Gas pressure regulator rdg 50 specifications. Gas pressure regulators

The buildings 17.06.2019

The buildings

Type: gas pressure regulator.

The RDG-80 regulator is designed for installation in gas control points of hydraulic fracturing of gas supply systems for urban and rural areas. settlements, in hydraulic fracturing and gas control units of the GRU of industrial and municipal enterprises.

The gas regulator RDG-80 provides a reduction in the inlet gas pressure and automatic maintenance of the set pressure at the outlet, regardless of changes in gas flow and inlet pressure.

The gas regulator RDG-80 as part of the gas control points of hydraulic fracturing is used in gas supply systems for industrial, agricultural and municipal facilities.

The operating conditions of the regulators must comply with the climatic version U2 GOST 15150-69 with the ambient temperature:

From minus 45 to plus 40 °C in the manufacture of body parts from aluminum alloys;

From minus 15 to plus 40 °C in the manufacture of body parts from gray cast iron.

Stable operation of the regulator under given temperature conditions is ensured by the design of the regulator.

For normal operation negative temperatures environment it is necessary that the relative humidity of the gas during its origin through the regulator valves be less than 1, i.e. when the loss of moisture from the gas in the form of condensate is excluded.

Warranty period of operation - 12 months.

Service life - up to 15 years.

Main specifications regulator RDG-80

Accession to the pipeline: flange according to GOST-12820.

Regulator operating conditions: U2 GOST 15150-69.

Ambient temperature: from minus 45 °С to plus 60 °С.

Regulator weight: no more than 60 kg.

Uneven regulation: no more than + - 10%.

Size parameter name	RDG-80N	RDG-80V
Nominal diameter of the inlet flange, DN, mm
Maximum inlet pressure, MPa (kgf / cm 2)	1,2 (12)
Outlet pressure setting range, MPa	0,001-0,06	0,06-0,6
Seat diameter, mm	65; 70/24*
Adjustment range of the actuation pressure of the automatic shutdown device RDG-N with a decrease in outlet pressure, MPa	0,0003-0,003
Adjustment range of the actuation pressure of the automatic shutdown device RDG-N with an increase in outlet pressure, MPa	0,003-0,07
Pressure setting range for automatic shutdown RDG-V devices when output pressure decreases, MPa	0,01-0,03
Adjustment range of the actuation pressure of the automatic shutdown device RDG-V with an increase in outlet pressure, MPa	0,07-0,7
Connecting dimensions of the inlet branch pipe, mm	80 GOST 12820-80
Connecting dimensions of the outlet pipe, mm	80 GOST 12820-80

* - The regulator DN 80 is manufactured with a single seat as standard, a double seat on request.

The device of the gas pressure regulator RDG-80 and the principle of operation

The RDG-80N and RDG-80V regulators include the following main assembly units:

executive device;
- control regulator;
- control mechanism;
- stabilizer (for RDG-N).

1. controller control; 2. control mechanism; 3. case; 4. shut-off valve; 5. valve is working; 6. non-adjustable throttle; 7. saddle; 8. adjustable throttle; 9. working membrane; 10. actuator rod; 11. impulse tube; 12. rod control mechanism.

regulator RDG-80V composition

regulator RDG-80N composition

The actuator has a flanged body, inside which a replaceable seat is installed. A membrane drive is attached to the lower part of the housing, which consists of a membrane, in the central seat of which the pusher rests, and a rod moves in the bushings of the guide column and transmits the vertical movement of the membrane to the control valve.

The control regulator generates a control pressure for the submembrane cavity of the membrane actuator of the actuator in order to reposition the control valve.

With the help of the adjusting glass of the control regulator, the pressure regulator RDG-80 is adjusted to the specified output pressure.

The stabilizer is designed to maintain a constant pressure at the inlet to the control regulator (pilot), i.e. to eliminate the influence of inlet pressure fluctuations on the operation of the regulator as a whole and is installed only on low outlet pressure regulators RDG-N.

The stabilizer and the control regulator (pilot) consist of: a housing, a spring-loaded diaphragm assembly, a working valve, and a control cup.

A manometer-indicator is installed after the stabilizer to control the pressure.

The control mechanism is designed to continuously monitor the outlet pressure and issue a signal to actuate the shut-off valve in the actuator in case of emergency increase and decrease in the outlet pressure above the allowable setpoints.

The control mechanism consists of a detachable housing, a membrane, a rod, a large and small tuning spring, which balance the effect of the output pressure pulse on the membrane.

The shut-off valve has a by-pass valve, which serves to equalize the pressure in the cavities of the body of the actuator before and after the shut-off valve when starting the regulator.

The filter is designed to clean the gas used to control the regulator from mechanical impurities.

Regulator RGD-80 works as follows. The inlet pressure gas enters through the filter to the stabilizer, then at a pressure of 0.2 MPa to the control regulator (pilot) (for the RDG-N version). Text copied from www.site. From the control regulator (for the RDG-N version), the gas enters the submembrane cavity of the actuator through an adjustable throttle. The supra-membrane cavity of the actuator through an adjustable throttle and impulse tube the inlet gas pipeline is connected to the gas pipeline downstream of the regulator.

The pressure in the submembrane cavity of the actuator during operation will always be greater than the outlet pressure. The supra-membrane cavity of the actuating device is under the influence of the outlet pressure. The control regulator (pilot) maintains a constant pressure behind it, so the pressure in the submembrane cavity will also be constant (in steady state).

Any deviation of the outlet pressure from the set one causes pressure changes in the supra-membrane cavity of the actuator, which leads to the control valve moving to a new equilibrium state corresponding to the new values of the inlet pressure and flow rate, while the outlet pressure is restored.

In the absence of gas flow, the valve is closed, which is determined by the absence of a control pressure drop in the supra-membrane and sub-membrane cavities of the actuator and the action of the inlet pressure.

In the presence of a minimum gas consumption, a control differential is formed in the supra-membrane and sub-membrane cavities of the actuator, as a result of which the membrane of the actuator with a rod connected to it, at the end of which the operating valve sits freely, will begin to move and open the passage of gas through the formed gap between the valve seal and saddle.

With a further increase in gas flow, under the action of a control pressure drop in the above cavities of the actuator, the membrane will move further and the rod with the working valve will begin to increase the passage of gas through the increasing gap between the seal of the working valve and the seat.

With a decrease in gas flow, the valve, under the influence of a changed control pressure drop in the cavities of the actuator, will reduce the passage of gas through the decreasing gap between the valve seal and the seat, and in the absence of gas flow, the valve will close the seat.

In the event of emergency increases and decreases in the outlet pressure, the membrane of the control mechanism moves to the left or right, the stem of the control mechanism through the bracket disengages from the stop and releases the levers associated with the shut-off valve stem. The shut-off valve, under the action of a spring, closes the gas inlet to the regulator.

Throughput of regulators RDG-80N and RDG-80V Q m 3 / h saddle 65 mm, p \u003d 0.72 kg / m 3

Pvx, MPa	Рout, kPa
Pvx, MPa	2…10	30	50	60	80	100	150	200	300	400	500	600
0,10	2250	2200	1850	1400
0,15	2800	2800	2800	2750	2600	2350
0,20	3400	3400	3400	3400	3350	3250	2600
0,25	3950	3950	3950	3950	3950	3950	3650	2850
0,30	4500	4500	4500	4500	4500	4500	4450	4000
0,40	5600	5600	5600	5600	5600	5600	5600	5600	4650
0,50	6750	6750	6750	6750	6750	6750	6750	6750	6500	5250
0,60	7850	7850	7850	7850	7850	7850	7850	7850	7850	7300	5750
0,70	9000	9000	9000	9000	9000	9000	9000	9000	9000	8850	8050	6200
0,80	10100	10100	10100	10100	10100	10100	10100	10100	10100	10100	9750	8700
0,90	11200	11200	11200	11200	11200	11200	11200	11200	11200	11200	11150	10550
1,00	12350	12350	12350	12350	12350	12350	12350	12350	12350	12350	12350	12100
1,10	13450	13450	13450	13450	13450	13450	13450	13450	13450	13450	13450	13400
1,20	14600	14600	14600	14600	14600	14600	14600	14600	14600	14600	14600	14600

Overall dimensions of the gas pressure regulator RDG-80

Regulator brand	Length, mm	Construction length, mm	Width, mm	Height, mm
RDG-80N	670	502	560	460
RDG-80V	670	502	560	460

Operation of the RDG-80 regulator

The RDG-80 regulator must be installed on gas pipelines with pressures corresponding to its technical specifications.

Installation and switching on of regulators must be carried out by a specialized construction and installation and operating organization in accordance with approved project, specifications for the production of construction and installation works, the requirements of SNiP 42-01-2002 and GOST 54983-2012 “Gas distribution systems. Natural gas distribution networks. General requirements to operation. Operational documentation".

The elimination of defects during the revision of regulators should be carried out without the presence of pressure.

During the test, the increase and decrease in pressure shall be carried out smoothly.

Preparation for installation. Unpack the regulator. Check the completeness of the delivery.

Depreserve the surfaces of the regulator parts from grease and wipe them with gasoline.

Check the RDG-80 regulator by external inspection for the absence of mechanical damage and the integrity of the seals.

Placement and installation.

The RDG-80 regulator is mounted on a horizontal section of the gas pipeline with the membrane chamber down. The connection of the regulator to the gas pipeline is flanged according to GOST 12820-80.

The distance from the bottom cover of the membrane chamber to the floor and the gap between the chamber and the wall when installing the regulator in the hydraulic fracturing and hydraulic distribution unit must be at least 300 mm.

The impulse pipeline connecting the pipeline with the sampling point must have a diameter of DN 25, 32. The connection point of the impulse pipeline must be located on top of the gas pipeline and at a distance from the regulator of at least ten diameters of the gas pipeline outlet pipe.

Local narrowing of the passage section impulse pipe not allowed.

The tightness of the actuator, stabilizer 13, control regulator 21, control mechanism 2 is checked by starting the regulator. In this case, the maximum inlet and outlet pressures for this regulator are set, and the tightness is checked using a soap emulsion. Pressurization of the regulator with pressure, the value of which is higher than that indicated in the passport, is unacceptable.

Operating procedure.

Before the regulator RDG-80 is installed technical pressure gauge TM 1.6 MPa 1.5 for measuring the inlet pressure.

A two-pipe pressure and vacuum gauge MV-6000 or a pressure gauge when working on low pressures, in the same technical pressure gauge TM-0.1 MPa - 1.5 when operating at medium gas pressure.

When the RDG-80 regulator is put into operation, the control regulator 1 is adjusted to the value of the preset output pressure of the regulator, the regulator is also reconfigured from one output pressure to another by the control regulator 11, while wrapping the adjusting cup of the membrane spring of the control regulator, we increase the pressure, and turning - lowering.

When self-oscillations appear in the operation of the regulator, they are eliminated by adjusting the throttle. Before putting the regulator into operation, it is necessary to open the bypass valve using the shut-off device lever; cock the automatic disconnecting device; the bypass valve will close automatically. If necessary, reconfiguration of the upper and lower limits of the shut-off valve actuation pressure is carried out by large and small adjusting nuts, respectively, while turning the adjusting nut, we increase the actuation pressure, and unscrewing it, lower it.

Maintenance. Regulator RDG-80V and RDG-80N is subject to periodic inspection and repair. Text copied from www.site. The term of repairs and inspections is determined by the schedule approved by the responsible person.

Technical inspection of the executive device. To inspect the control valve, it is necessary to unscrew the top cover, remove the valve with the stem and clean them. The valve seat and guide bushings should be thoroughly wiped.

In the presence of nicks and deep scratches seat should be replaced. The valve stem must move freely in the column bushings. To inspect the membrane, remove the bottom cover. The membrane must be inspected and wiped. It is necessary to unscrew the throttle needle, blow and wipe.

Inspecting the Stabilizer 13. To inspect the stabilizer, unscrew the top cover, remove the diaphragm assembly and valve. The diaphragm and valve must be wiped. When inspecting and assembling the diaphragm, wipe the sealing surfaces of the flanges. Inspection of the control regulator is carried out similarly to the inspection of the stabilizer 13.

Inspection of the control mechanism. Unscrew the adjusting nuts, remove the springs and the top cover. Inspect and wipe the membrane. Verify the integrity of the valve seal. Replace membrane if necessary. Wipe the sealing surfaces of the body and cover.

Possible malfunctions of the RDG-80 regulator and methods for their elimination

Fault name, outward manifestation and additional features	Likely Causes	Elimination Method
The shut-off valve does not ensure the tightness of the constipation.	Breakage of the shut-off valve spring. Breakaway valve seal by gas flow. Worn seal or damaged shut-off valve.	Replace defective parts.
The shut-off valve does not work consistently. Not amenable to adjustment.	Breakage of the large spring of the control mechanism.
The shut-off valve does not open when the outlet pressure drops.	Breakage of the small spring control mechanism.	Replace the spring, adjust the control mechanism.
The shut-off valve does not work in case of emergency increase and decrease in outlet pressure.	Membrane rupture of the control mechanism.	Replace the membrane, adjust the control mechanism.
With an increase (decrease) in the outlet pressure, the outlet pressure increases (decreases) sharply.	Actuator diaphragm rupture. Worn control valve seals. Stabilizer diaphragm rupture. Control regulator diaphragm rupture.	Replace defective diaphragms, gaskets, seat.

Gas pressure regulator RDG-50N, RDG-50V is a device that lowers gas pressure from high and medium values to a certain level. The reducer refers to the reducers after itself. The pressure value set by the consumer is maintained in automatic mode. To prevent emergencies that have arisen due to a sharp increase or drop in pressure, a blocking device is provided in the regulator. It is allowed to operate the device at an ambient temperature from -40 to +60 ° C. Normal operation of the reducer at low temperatures will be ensured under conditions where the relative humidity of the gas passing through the reducer is less than 1. Under such conditions, the formation of condensate is excluded.

Specifications RDG-50N, RDG-50V

Parameter name	RDG-50N	RDG-50V
Working environment	Natural gas according to GOST 5542-87
Maximum inlet pressure, MPa	1,2
Seat diameter, mm	25,35,40,42,45
Outlet pressure setting range, kPa	160	30-600
Setting range of the shut-off device, kPa - with a decrease in output pressure - with an increase in output pressure	0,3-31,4-12	3-3037,5-160
Accuracy of actuation of the disconnecting device, %, no more	±5
Housing material	Aluminum AK7ch GOST 1583-93
Construction length, mm	365±2
Nominal diameter inlet/outlet, mm	50/50
Overall dimensions, mm, no more than - length - width - height	430482503	430405509
Weight, kg, no more	28	26

Installation of the regulator RDG-50N, RDG-50V

The reducer is mounted on a horizontal pipeline with the membrane chamber down. The impulse pipeline to the regulator from the outlet gas pipeline must be at least 20 mm in diameter. The impulse pipeline to the control mechanism from the outlet gas pipeline must be with a nominal diameter of at least 15 mm.

To periodically check the operation of the shutdown device on the impulse pipeline to the control mechanism, it is necessary to provide a fitting for supplying pressure and a pressure gauge. When inserting impulse pipelines into a gas pipeline, holes in the gas pipeline must be drilled, and not cut through by a welding torch, in order to avoid metal buildup on the wall, which can lead to distortion of the sampled pressure pulse.

The tie-in points of controlled pressure pulses must be on straight section the main gas pipeline following the expansion, at a distance equal to 5 ... 10 pipeline diameters. The tie-in points of the impulses should be located in the upper part of the gas pipeline.

A manometer is placed in front of the reducer to measure the inlet pressure. A manometer for measuring the outlet pressure is installed at the top of the gas pipeline in close proximity to the points of sampling of impulses. The tightness of the actuator, stabilizer, control regulator, control mechanism is checked by trial run of the regulator. In this case, the maximum inlet and outlet pressure for the tested gearbox is set, and the tightness is determined using a soap solution. Testing the regulator with water is prohibited! The reducer is pressurized with a pressure not exceeding the pressure in the passport.

There is no RDG-50N(V) repair kit as standard. By additional order, the reducer is equipped with all necessary spare parts, the composition of which is determined by the customer himself.

Possible markings:

RDG-50N/25

RDG-50N/30

RDG-50N/35

RDG-50N/40

RDG-50N/45

Capacity of the regulator RDG-50N(V).

Rvh. MPa	RDG-50N (saddle 30mm)	RDG-50V (saddle 30mm)	RDG-50N (saddle 35mm)	RDG-50V (saddle 35mm)	RDG-50N (saddle 40mm)	RDG-50V (saddle 40mm)	RDG-50N (saddle 45mm)	RDG-50V (saddle 45mm)

To find out the price, specifications, RDG-50 passport, you just need to contact our managers.

Specifications RDG-80-N(V)

	RDG-80-N(V)
Controlled environment	natural gas according to GOST 5542-87
Maximum inlet pressure, MPa	0,1-1,2
Outlet pressure setting limits, MPa	0,001-0,06(0,06-0,6)
Gas throughput with ρ=0.73 kg/m³, m³/h: R in = 0.1 MPa (app. N) and R in = 0.16 MPa (version B)	2200
Working valve seat diameter, mm:
big	80
small	30
Uneven regulation, %	±10
Pressure setting limit of triggered automatic shutdown device, MPa:
when output pressure drops	0,0003-0,0030...0,01-0,03
when output pressure rises	0,003-0,070...0,07-0,7
Connecting dimensions, mm:
D at the inlet	80
D at the outlet	80
Compound	flange according to GOST 12820
Overall dimensions, mm	575×585×580
Weight, kg	105

The device and principle of operation of RDG-80-N (V)

The actuator (see figure) with small 7 and large 8 control valves, shut-off valve 4 and noise suppressor 13 is designed by changing the flow sections of the small and large control valves to automatically maintain the specified outlet pressure in all gas flow modes, including zero, and turn off the gas supply in the event of an emergency increase or decrease in outlet pressure. The actuator consists of a cast body 3, inside which a large seat 5 is installed. The valve seat is replaceable. A membrane drive is attached to the bottom of the housing. The pusher 11 rests against the central seat of the membrane plate 12, and the rod 10 transmits the vertical movement of the membrane plate to the stem 19, at the end of which a small control valve 7 is rigidly fixed. The rod 10 moves in the bushings of the housing guide column. Between the protrusion and the small valve, a large control valve 8 sits freely on the stem, in which the seat of the small valve 7 is located. Both valves are spring-loaded.

Under the large saddle 5 there is a noise suppressor in the form of a glass with slotted holes.

Stabilizer 1 is designed (in the “H” version) to maintain a constant pressure at the inlet to the control regulator, i.e. to exclude the effect of fluctuations in the outlet pressure on the operation of the regulator as a whole. The stabilizer is made in the form of a direct-acting regulator and includes: a body, a membrane assembly, a head, a pusher, a valve with a spring, a seat, a sleeve and a spring for adjusting the stabilizer to a given pressure before entering the control regulator. The pressure on the pressure gauge after the stabilizer must be at least 0.2 MPa (to ensure a stable flow rate).

Stabilizer 1 (for version "B") maintains a constant pressure behind the regulator by maintaining a constant pressure in the submembrane cavity of the actuator. The stabilizer is made in the form of a direct action regulator. In the stabilizer, unlike the control regulator, the supra-membrane cavity is not connected to the supra-membrane cavity of the actuator, and a stiffer spring is installed to adjust the regulator. The adjusting cup adjusts the regulator to the specified outlet pressure.

The pressure regulator 20 generates a control pressure in the submembrane cavity of the actuator in order to reset the control valves of the control system. The control regulator includes the following parts and assemblies: housing, head, assembly, membranes; pusher, valve with spring, seat, cup and spring for adjusting the regulator to a given outlet pressure. With the help of the adjusting cup of the control regulator (for version "H"), the pressure regulator is adjusted to the specified outlet pressure.

Adjustable chokes 17, 18 from the submembrane cavity of the actuator and on the discharge impulse tube are used to adjust for a quiet (without oscillation) operation of the regulator. Adjustable choke includes: body, slotted needle and stopper.

The pressure gauge is designed to control the pressure in front of the control regulator.

The shut-off valve control mechanism 2 is designed to continuously monitor the outlet pressure and issue a signal to actuate the shut-off valve in the actuator in case of emergency increase and decrease in the outlet pressure above the allowable set values. The control mechanism consists of a detachable housing, a diaphragm, a rod, a large and a small spring, which balance the effect of the output pressure pulse on the diaphragm.

Filter 9 is designed to clean the gas supplying the stabilizer from mechanical impurities

The regulator works as follows.

The input pressure gas flows through the filter to the stabilizer 1, then to the control regulator 20 (for version "H"). From the control regulator (for version "H") or the stabilizer (for version "B"), the gas flows through the adjustable throttle 18 into the submembrane cavity and through the adjustable throttle 17 into the submembrane cavity of the actuator. Through the throttle washer 21, the supra-membrane cavity of the actuator is connected by an impulse tube 14 to the gas pipeline downstream of the regulator. Due to the continuous flow of gas through the throttle 18, the pressure in front of it, and, consequently, the sub-membrane cavity of the actuator, during operation, will always be greater than the outlet pressure. The supra-membrane cavity of the actuating device is under the influence of the outlet pressure. The pressure regulator (for version “H”) or the stabilizer (for version “B”) maintains a constant pressure, so the pressure in the sub-membrane cavity will also be constant (in steady state). Any deviations of the outlet pressure from the set one cause pressure changes in the supra-membrane cavity of the actuator, which leads to the control valve moving to a new equilibrium state corresponding to the new values of the inlet pressure and flow rate, while the outlet pressure is restored. In the absence of gas flow, the small 7 and large 8 control valves are closed, which is determined by the action of the springs 6 and the absence of a control pressure drop in the above-membrane and sub-membrane cavities of the actuator and the action of the outlet pressure. In the presence of a minimum gas consumption, a control pressure drop is formed in the supra-membrane and sub-membrane cavities of the actuator, as a result of which the membrane 12 will begin to move under the action of the resulting lifting force. Through the pusher 11 and the rod 10, the movement of the membrane is transmitted to the stem 19, at the end of which the small valve 7 is rigidly fixed, as a result of which the gas passes through the gap formed between the seal of the small valve and the small seat, which is directly installed in the large valve 8. In this case, the valve under the action of spring 6 and inlet pressure, it is pressed against the large seat, so the flow rate is determined by the flow area of the small valve. With a further increase in gas flow under the action of a control pressure drop in the indicated cavities of the actuator, the membrane 12 will begin to move further and the stem with its protrusion will begin to open the large valve and increase the passage of gas through the additionally formed gap between the valve seal 8 and the large seat 5. With a decrease in gas flow, the large valve 8 under the action of a spring and receding under the action of a changed control pressure drop in the cavities of the actuating device of the stem 19 with protrusions will reduce the flow area of the large valve and subsequently close the large seat 5. The regulator will begin to operate in low load modes.

With a further decrease in the gas flow, the small valve 7 under the action of the spring 6 and the changed control pressure drop in the cavities of the actuator, together with the membrane 12, will move further in the opposite direction and reduce the gas flow.

In the absence of gas flow, the small valve 7 will close the small seat. In the event of an emergency increase and decrease in the output pressure, the membrane of the control mechanism 2 moves to the left and right, the shut-off valve lever 4 comes out of contact with the stem 16, the shut-off valve under the action of the spring 15 will shut off the gas flow by the regulator.

1 - stabilizer; 2 - control mechanism; 3 - body of the actuator; 4 - shut-off valve; 5 - large saddle; 6 - springs of small and large control valves; 7, 8 - small and large control valve; 9 - filter; 10 - rod of the actuator; 11 - pusher; 12 - membrane of the actuator; 13 - noise suppressor; 14 - impulse tube of the outlet gas pipeline; 15 - cut-off valve spring; 16 - rod of the control mechanism; 17, 18 - control chokes; 19 - stock; 20 - control regulator; 21 - throttle washer

Specifications RDG-50N(V)

	RDG-50N	RDG-50V
	1,2	1,2
	1-60	30-600
Seat diameter, mm	35 (25)	35(25)
	900 (450)	900 (450)
	±10	±10

	0,3-3	3-30
	1-70	0,03-0,7
D
entrance	50	50
exit	50	50
Construction length L, mm	365	365

length l	440	440
width B	550	550
height H	350	350
Weight, kg, no more	80	80

* Provided with a set of replacement springs.

The device and principle of operation of RDG-50N (V)

The regulator actuator (see figure) with control valves and a shut-off valve is designed to automatically maintain the specified outlet pressure in all gas flow rates by changing the valve flow area, to turn off the gas supply in case of emergency increase and decrease in outlet pressure.

The actuating device has a housing 3, inside which a saddle is installed. The membrane actuator consists of a membrane 5, a rod connected to it, at the end of which a valve is fixed. The rod moves in the bushings of the guide column of the body.

Stabilizer 1 is designed to maintain a constant pressure at the inlet to the control regulator, i.e., to exclude the influence of inlet pressure fluctuations on the operation of the regulator as a whole. The stabilizer is made in the form of a direct-acting regulator and includes: a housing, a spring-loaded diaphragm assembly, and a working valve. The inlet pressure gas flows through the stabilizer 1 to the control regulator 7. From the control regulator (for the RDG-80N version) or from the stabilizer (for the RDG-80V version), the gas enters the submembrane cavity through the adjustable throttle 4, and through the impulse tube - into the above-membrane cavity actuator. Through the throttle, the submembrane cavity of the actuator is connected to the gas pipeline behind the regulator. The pressure in the submembrane cavity of the actuator during operation will always be greater than the outlet pressure. The supra-membrane cavity of the actuating device is under the influence of the outlet pressure.

The control regulator (for the RDG-80N version) or the stabilizer (for the RDG-80V version) maintains a constant pressure behind it, so the pressure in the sub-membrane cavity will also be constant (in the set mode).

Any deviations of the outlet pressure from the set one cause pressure changes in the supra-membrane cavity of the actuator, which leads to the valve moving to a new equilibrium state corresponding to the new values of the inlet pressure and flow rate, while the outlet pressure is restored. In the absence of gas flow, the valve is closed, which is determined by the absence of a control pressure drop in the supra-membrane cavity of the actuator and the action of the inlet pressure. In the presence of gas consumption, a control differential is formed in the supra-membrane and sub-membrane cavities of the actuator, as a result of which the membrane 5 with the stem connected to it, at the end of which the valve is fixed, will move and open the passage of gas through the gap formed between the valve seal and the seat. With a decrease in gas flow, the valve, under the action of a control pressure drop in the cavities of the actuator, together with the membrane, will move in the opposite direction and reduce the gas passage, and in the absence of gas flow, the valve will close the seat. In the event of emergency increases and decreases in the outlet pressure, the membrane of the control mechanism 2 moves to the left or right, the shut-off valve stem comes out of contact with the stem 6 of the shut-off valve control mechanism, and under the action of the spring closes the gas inlet to the regulator.

Gas pressure regulator RDG:
1 - stabilizer; 2 - membrane of the control mechanism; 3 - body; 4 - adjustable throttle; 5 - membrane; 6 - stock; 7 - control knob

	RDG-50N	RDG-50V
Maximum inlet pressure, MPa	1,2	1,2
Outlet pressure setting limits, kPa	1-60	30-600
Seat diameter, mm	35 (25)	35(25)
Throughput at an inlet pressure of 0.1 MPa and an outlet pressure of 0.001 MPa for gas with a density of 0.72 kg/m³, m³/h	900 (450)	900 (450)
Uneven regulation, %, no more	±10	±10
Limits of adjustment of pressure of operation of the automatic disconnecting device, kPa:
when output pressure drops	0,3-3	3-30
when output pressure rises	1-70	0,03-0,7
D u, connecting pipe, mm:
entrance	50	50
exit	50	50
Construction length L, mm	365	365
Overall dimensions, mm, not more than:
length l	440	440
width B	550	550
height H	350	350
Weight, kg, no more

Throttle overmembrane RDG
Throttle submembrane RDG
Shut-off valve RDG
RDG pilot valve
Valve working RDG
Stabilizer valve RDG
Sealing ring RDG
Membrane of the RDG control mechanism
RDG Pilot Membrane
Membrane working RDG
Membrane stabilizer RDG
Shut-off valve spring RDG
RDG pilot valve spring
Spring control mechanism large RDG
Pilot spring RDG
RDG stabilizer spring
Spring control mechanism small RDG
RDG Pilot's Saddle
Regulator seat RDG
Shut-off valve seal RDG
RDG Regulator Filter
Valve stem working RDG
The rod of the control mechanism RDG
Pilot RDG
RDG stabilizer

Above, we have listed the main parts that can fail during the operation of the regulator. At present, in a crisis, it is often easier to repair a working regulator than to buy a new one. Of course, this is not always cost-effective, but often this is a real way out, which is economical in terms of money, but rather labor-intensive. It should immediately be noted that repair of the RDG-50 regulator should only be carried out by specially trained personnel authorized to this species works! Savings in this case can lead to sad consequences, ranging from a serious breakdown of the regulator, to accidents with human casualties.
RDG-50N without much effort can be found in many organizations involved in the supply gas equipment. But it should be noted that not everyone understands the intricacies of the operation of the gearbox and the differences in the main components. If you decide repair kit RDG-50N order, then first of all it is necessary to clarify the manufacturer of this product and preferably the year of its production. The fact is that in appearance it can be said that the regulators of different manufacturers practically do not differ, but the components can have significant differences. With regard to RTI, for example, membrane working RDG-50 everyone has the same. The only difference between them is the material.

Some manufacturers make membranes from membrane web, and some make them cast. The same goes for pilot membrane RDG-50 and stabilizer membrane RDG-50. But with the membranes of the pilot, not everything is so simple. There are several pilot designs. The round membrane of the pilot RDG-50 and the square membrane of the pilot differ not only in shape, but also in size. It is worth paying attention to the throttles.

Throttle RDG-50 may have different design. There was a case when the customer provided the name of the plant, but did not specify the year of production. When spare parts for RDG-50 were put it turned out that the chokes are not suitable. They turned out to have experimental regulators, parts for which no one had made for a long time. Saddle RDG-50 Rarely anyone differs, but still there are different. When ordering a saddle, as well as valve RDG-50, it is necessary to specify the diameter.
An important aspect when choosing spare parts is the material from which they are

are made and the production process itself also leaves its mark on the quality of parts. For example, if valve seal RDG-50 if it is not pressed with high quality, then such a valve will not work for a long time and will have to be repaired again.
Manufacturers are constantly working on the design of their regulators. This is due to the desire to reduce costs, as well as improve the quality and accuracy of work. Technicians develop new designs and this leads to changes in the internal parts of the regulators.
Regulators RDG-50, RDG-80 and RDG-150 have a similar design and the difference between the repair kits is the size of the parts. For example membrane working RDG-150 significantly more than membrane working RDG-80. The same is true with valves. Due to the difference in passage diameters and, accordingly, bandwidth valve working RDG-150 more than valve working RDG-80, and that, in turn, is larger than the working valve RDG-50. Such components as the pilot and stabilizer from one manufacturer do not differ for regulators with different diameters. High regulators do not have a stabilizer in their design, so the cost of a repair kit will be lower. At repair kit RDG-150 price the highest among the three modifications, repair kit RDG-80 price intermediate and, accordingly, the price of the repair kit for the RDG-50 is the lowest.

We provide an opportunity repair kit RDG buy with delivery in Serpukhov, Odintsovo, Krasnogorsk, Khimki, Balashikha, Domodedovo, Lyubertsy, Podolsk, Chekhov, Stupino, Ramenskoye, Korolev, Pushkino, Noginsk, Tambov, Almaty, Atyrau, Aktau, Moscow, Novosibirsk, Nizhny Novgorod, Omsk, Tomsk, Yaroslavl, Petrozavodsk, Kazan, Aktobe, Karaganda, Ulan-Ude, Vladivostok, Khabarovsk, Penza, Kaluga, Volgograd, Chelyabinsk, Yekaterinburg, Ivanovo, Kstovo, Cheboksary, Ryazan, Dzerzhinsk, Rostov-on-Don, Perm, St. Petersburg, Kursk, Tula, Tver, Samara, Voronezh, Naberezhnye Chelny, Tyumen, Gatchina, Vladimir, Veliky Novgorod, Krasnoyarsk, Volzhsky, Belgorod, Rybinsk, Barnaul, Smolensk, Samara, Shchekino, Kemerovo, Orenburg, Surgut, Khasavyurt, Makhachkala, Grozny, Kaspiysk, Ufa, Miass, Krasnodar, Stavropol, Togliatti, Stary Oskol, Sterlitamak, Ishimbay, Rudny, Bryansk, Kostanay, Uralsk Sochi, Novokuznetsk, Astana, Amursk, Angarsk, Norilsk, Nizhnekamsk, Elista, Biysk, Murmansk, Vladikavkaz, Khanty-Mansiysk, Nalchik, Orel, Kalining Rada, Yoshkar-Ola. To do this, you need to contact us in any way convenient for you.