Ball valves LD. Steel ball valves LD Flanged ball valves ld manufacturer

LD- trademark, under which the ChelyabinskSpetsGrazhdanStroy plant supplies pipe fittings to the market. LD ball valves in their price category have almost completely replaced foreign counterparts, they are distinguished by high reliability, durability and.

This article presents LD pipe fittings. We'll consider design features cranes, their functional purpose and working principle. The assortment of the company will also be studied and recommendations on the choice of specific models of fittings will be offered.

Article content

Design features of LD cranes

LD company manufactures for industrial use, certified according to the standard GOST No. 54808 “Pipeline shut-off valves“. All products are made in an all-welded housing, which does not have bolted connectors, which reduces the risk of leakage under increased dynamic load in the pipeline to zero.

A feature of LD cranes is that for the manufacture of their body, not cast blanks are used, as in most competitors, but elements produced by cold stamping. This design provides increased strength of the body due to the absence of limiting stresses in the metal. Workpieces are joined in shielding gases (Ar+CO2) by means of automatic welding. Usage gas environment ensures minimal waste of the alloying components of steel, which gives an increased quality of the weld.

LD ball valves have the following layout:

1. The body is made of carbon steel grade 09G2S.
2. Connecting pipe for welding fittings to the pipeline
3. The neck fixing the rod on the body.
4. The stem that connects the hand lever to the locking element.
5. Restrictive washer that prevents stem shifts.
6. Locking ball with through perforation.
7. Seat seal made of M4K20 rubber;
8. Support ring.
9. Disc spring.
10. Stem Throat Seals - Ensures body seal against the environment.
11. The sealing ring performs a similar function.
12. Flanged connection plate.
13. The handle may have a "butterfly" configuration.
14. Round sealing ring.
15. Restriction nut - fixes the actuator handle on the stem.

All LD ball valves are certified according to the “A” tightness class - they have a zero level of leakage, which is achieved through the use of a system of redundant seals. Secondary seals are represented by O-rings located on the PTFE seat of the shut-off ball.

Fittings with a diameter of 50-500 mm have additional disc springs on the saddle, which ensure the same tightness of the valve when the working medium circulates in both directions, regardless of its temperature.

LD valves have a unified type marking KSh.Ts.F.015.0.040.X/L.03, wherein:

• KSh - ball valve;
• C - all-welded;
• F - flanged (M - coupling, P - for welding);
• 015 – nominal diameter, mm;
• 040 - working pressure, Bar;
• X/L - cold-resistant design with respect to impacts environment;
• 03 - time between failures, thousand cycles (at least 3000).

All modifications of LD fittings can be mounted on the pipeline in any position - vertical or horizontal.

Production of LD ball valves (video)

Product range

Range pipe fittings LD is divided into three series:

• Energy KShTsF - flange type ball valves;
• Energy KShTsP - ball fittings for welding;
• Energy KShTsM - coupling type taps for threaded connection.

Each series includes designs with a nominal diameter of 15-500 mm, designed for operation in systems with pressures up to 40 MPa. The company produces in a carbon steel casing, which can be installed on water supply pipelines, heating mains, lines for transporting fuels and lubricants, liquids, gases and vapors that do not contain abrasive impurities.

The range also includes fittings made of stainless steel, suitable for operation in any systems, the working environment of which does not have a corrosive effect on body materials. The temperature range of the transported medium is from -60 to +200 degrees, the environment - from +60 to +60 0.

The lineup pipe fittings LD consists of the following items:

1. Full bore and reduced valves with a diameter of 15-500 mm. In full-bore structures, the cross section of the through hole is identical to the diameter of the pipeline on which the fittings are mounted; in reduced analogues, the hole size is 80% of the pipe diameter. Designs with a diameter of 15-200 mm are made with a manual drive-handle. Size 150-200 mm is equipped with a worm gearbox, which facilitates valve control, with products 250-400 mm a mechanical gearbox is supplied.

   

2. Drain cocks for gas and liquid working medium - are available in a diameter of 15-50 mm. They are made in cases made of carbon steel 20X13 and stainless steel AISI304. Designed for installation on technical tanks, reservoirs and thermal equipment in order to release the working medium while monitoring its presence and sampling. Can be used in systems with pressure up to 10 MPa, working temperature in which does not exceed 225 degrees.

   

3. Cranes for underground laying with an extended stem. They are produced in diameters of 50-400 mm for a pressure of 16-40 MPa. The height of the stem varies between 1.5-3 meters. To facilitate manual control (using a standard T-key), a plain bearing made of PTFE is installed on the valve stem. Designs of large diameters (over 200 mm) can be equipped with electric or.

   

4. Cranes with a mechanical gearbox - the line includes fittings with a diameter of 100-300 mm. Due to the presence of the gearbox, the efforts that must be applied when opening the tap are significantly reduced. Also, the reducer prevents the possibility of water hammer in the pipeline. As standard, the structures are equipped with a ProGear gearbox, however, according to individual orders, it is possible to install a gearbox from third-party manufacturers.

   

5. Combined valves - the series consists of fittings with a diameter of 15-250 mm, working pressure 25-40 MPa. The structures have F/P configuration - one connecting pipe is flanged, the second one is for welding.

Flanged valves have standard connecting dimensions according to GOST No. 12815. The manufacturer uses version No. 1 (with a connecting ledge). This method of connection provides the most durable and reliable joint, which is why it is widely used in all areas of industry.

Coupling fittings have internal thread(BP) inch type corresponding to the requirements of GOST No. 6357. Such fittings are easier to install, however, due to the fact that the thread reduces the thickness of the body walls, sleeve valves have a limited scope.

Valves for welding are designed for installation by electric welding, gas welding can be used when installing structures with a diameter of up to 150 mm. During installation of fittings on horizontal pipelines must be in the open position. On vertical lines, when welding the upper branch pipe, the shutter is open, the lower one is closed. Welded fittings can be used on pipelines whose vibration displacement amplitude does not exceed 0.25 mm.

Holding Santekhkomplekt is the official dealer of ChelyabinskSpetsGrazhdanStroy. The largest Ural manufacturer under the trademark LD manufactures steel ball valves. They are designed for transportation of oil and gas, installation of pipelines, used in heat and water supply systems. Each product of the Chelyabinsk company undergoes mandatory tests for compliance with GOST and TU. Constant control of production guarantees a very high quality of products and a positive reputation among consumers.

Cranes LD

ChelyabinskSpetsGrazhdanStroy produces high-quality LD cranes for various areas industry. The LD crane is used in gas and oil pipelines, in water and heat supply systems, as well as in production shops enterprises Food Industry. It is reliable and does not let the agent moving through the pipes, preventing leaks. In addition, the LD crane is easy to maintain and does not require regular maintenance.

Ball valves LD

LD ball valves are required for industrial and technological pipelines, as well as for utilities. Cranes of this brand are indispensable in the following working environments: gas, oil products, steam, compressed air, drinking and technical water, aqueous solutions, aggressive liquids, alcohol-containing substances. They are issued in various types: flanged, welded, socket, combined. LD ball valves are easy to operate and have a shelf life of up to 30 years.

All-welded ball flanged valves LD are manufactured by ChelyabinskSpetsGrazhdanStroy LLC. They are presented in the catalog in full range. Steel flanged standard bore and full bore LD valves are on sale. Flanged valves LD KSh.Ts.F. designed to shut off the working flow in steam and water pipelines operating under pressure up to 40 atm, with temperatures up to 200 degrees Celsius. Below detailed description production materials:

• Frame: steel (St.20, 12X18H10T, 09G2S)
• Ball: stainless steel
• DN 15-32: 20X13; DN 40-65: AISI 304; DN 80-700: AISI 409;
• Stock: stainless steel (12X18H10T, 20x13)
• stem seal: fluorosiloxane elastomer
• Rod seal/plain bearing: fluoroplast Ф4К20 (PTFE+C, Teflon)
• ball seal: fluoroplast Ф4К20 (PTFE+C, Teflon) with backup seal made of fluorosiloxane elastomer

Steel flanged ball valves LD are manufactured in Russia and occupy a leading position in terms of price and quality. Full cycle production within one enterprise ensures maximum product quality.

Control options for flanged valves LD KShTsF

DN 15-250: handle - painted carbon steel with polymer tip

DN 300-700: mechanical gearbox included

The ball valve has become an indispensable alternative to valves for a number of reasons: the flow in the pipeline is quickly regulated, a high degree of tightness is ensured, and they are suitable for aggressive substances. One of the most reliable manufacturers in this area is Chelyabinsk Spets Grazhdan Stroy, whose brainchild is flanged ball valves LD. The company's products are known for their durability and reliability. The manufacturer has a strict attitude to his work. In each batch, the LD steel ball valve is tested for compliance with the set standards. Only tested batch will be shipped. This guarantees the quality of each device. Our company offers big choice of this product, in the catalog you can choose a steel flanged ball valve LD of a suitable type and load level.

Purpose and features of ld steel ball valve

Production material - steel. It is a durable metal that is not damaged by various aggressive environments. Steel withstands mechanical loads, including water hammer. For these and other reasons, the LD steel flanged ball valve is suitable for installation in gas, oil, heat and water supply systems, in food industry workshops. The only exceptions are those media that are specifically aggressive for steel. The design of products in this category allows you to maintain good tightness. Steel ball valve LD, unlike other types of shut-off equipment, has a gate element in the form of a sphere. It does not have any mounting holes, which creates a continuous overlap in the pipe. The design also includes additional sealant. Therefore, flanged ball valves LD have increased tightness of transportation products. The property is maintained even under dynamic loads in the pipeline.

The tightness quality classification of the gate is category “A”, which means that the property remains even with temperature fluctuations. Therefore, the LD steel ball valve is suitable for installation outdoors, in moderate and cold climatic conditions. The applied sealant also corresponds to this. The shutter element is supplemented with fluorosiloxane elastomer and fluoroplast. Due to the tightness class and the type of seal, the LD steel ball valve can be installed in industrial pipelines. Since it maintains tightness in an unstable working environment. Greater strength and stability of the device is the flange type of connection. In the store, LD ball valves in all available varieties. The products correspond to the standard pipe assortment. They are designed for standardized pipe sizes. Therefore, you can buy a steel ball valve LD for any type of pipeline.

Range of ld cranes in Gremir

The products are easy to install and maintain. But they differ in some technical specifications. In our catalog you will purchase LD ball valves of the following varieties:

• Standard construction type. The ball hole diameter is one size smaller than the pipe diameter. The ball valve LD steel flange is suitable for installation in systems in which a small percentage of head loss is allowed.
• Full port design. The hole of the ball fully corresponds to the diameter of the pipe. Therefore, the LD steel flanged ball valve provides full opening or complete closure without any lumen. There is no product leakage in the system. Provides complete shut-off of liquid, vapor or gas. Flanged LD valves are suitable for industrial mains. The type of device causes reduced hydraulic losses.

Since the valves are flanged LD, their connection is carried out using additional elements flanges. And thanks to gaskets made of paronite and baconite, the connections remain completely tight. Choose in the catalog of our store ball valve LD. The description of the parameters will help you choose the desired diameter and size of the product. We have an affordable price for ball valve LD and a large selection of products. We organize delivery of your order across the Russian Federation. You can find out the details on the website. To buy a steel ball valve LD leave a request.

LLC "ChelyabinskSpetsGrazhdanStroy" is the largest Russian manufacturer of all-welded steel ball valves manufactured since 2003 under the LD trademark.

Ball valves LD- This is a shut-off and shut-off and control valve, which is actively used in the oil and gas industry. In addition, the products are actively used by companies in the housing and communal services sector.

Ball valves LD are used on industrial and technological pipelines transporting the following media: gas, oil products, steam, compressed air, drinking and process water, aqueous solutions, aggressive liquids, alcohol-containing substances.

Ball valves are produced with a nominal diameter of 15 to 700 mm, both standard bore and full bore. All models of LD ball valves are available with various types connections - flanged, coupling, welding, with polyethylene pipes for welding to HDPE pipes, as well as combined. Small diameter valves may also have a threaded connection. LD cranes of large diameters can be produced in several versions with different face-to-face lengths, including gate valves. Some models designed for transportation liquid media, have a bleed valve to remove air from the pipeline.

Cranes of large diameter are equipped with a gearbox, and products designed for the installation of an electric drive are also produced.

Ball valves LD can be installed on the pipeline in any position - both horizontally and vertically. Range allowable temperatures can range from -60°C to +200°C (for valves in a special climatic version). The working pressure for main shut-off valves is up to 25 bar, some models of small diameter valves are designed for 40 bar, regardless of the temperature of the medium.

Depending on the purpose, the body material is steel of various grades: St.20, 09G2S or 12N18X10T. The body of all models of LD cranes is all-welded, there are no bolted connections in it, due to which the resistance of stop valves to dynamic loads is significantly increased. Hulls are welded automatically in an inert gas environment, which eliminates the inhomogeneity of the weld. In addition, the design of LD cranes does not use cast elements, as in most analogues, but made by cold stamping.

The key to the quality of products of ChelyabinskSpetsGrazhdanStroy LLC is the constant control of material and workpieces at all stages of the manufacture of LD ball valves, as well as mandatory testing of each LD ball valve on test benches in accordance with GOST 9544-93"Pipeline shut-off valves. Norms of tightness of gates".

The average resource of ball valves is 10,000 cycles of opening and closing, the estimated service life is about 25 years. The manufacturer provides a three-year warranty for each product.