Cranes LD. Ball valves ld Product range

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 working media: gas, oil products, steam, compressed air, drinking and process water, aqueous solutions, aggressive liquids, alcohol-containing substances.

Ball valves are produced with nominal diameters from 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. Cranes not large diameters may also have 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 the transport of liquid media have a bleed valve to remove air from the pipeline.

Cranes large diameter are completed with a reducer, the products calculated on installation of the electric drive are also issued.

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). Working pressure for main stop 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 shut-off 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.

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 principle of operation. The range of the company will also be studied and recommendations for choosing specific models fittings.

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 that does not have bolted connectors, which reduces the risk of leaks 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. The use of a gaseous medium provides a minimum waste of the alloying components of the steel, which gives an increased quality of the weld.

LD ball valves have the following layout:

The body is made of carbon steel grade 09G2S.
Connecting pipe for welding fittings to the pipeline
The neck fixing the rod on the body.
The stem that connects the hand lever to the locking element.
Restrictive washer that prevents stem shifts.
Locking ball with through perforation.
Seat seal made of M4K20 rubber;
Support ring.
Disc spring.
Stem Throat Seals - Ensures body seal against the environment.
The sealing ring performs a similar function.
Flanged connection plate.
The handle may have a "butterfly" configuration.
Round sealing ring.
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 model range of LD pipeline fittings consists of the following positions:

Full bore and reduced valves with a diameter of 15-500 mm. In full bore designs, the cross section of the through hole is identical to the diameter of the pipeline on which the fittings are mounted, in reduced analogs, the hole size is 80% of the pipe diameter. Designs with a diameter of 15-200 mm are made with a manual drive-handle. Standard size 150-200 mm is equipped with a worm gearbox, which facilitates valve control, with products 250-400 mm a mechanical gearbox is supplied.
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 environment 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.
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. For relax 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.
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. In the standard configuration, the structures are equipped with a ProGear gearbox, however, according to individual orders, it is possible to install a gearbox from third-party manufacturers.
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 connection method 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 industries. 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 process piping as well as for engineering communications. Taps of this brand are indispensable in the following working environments: gas, oil products, steam, compressed air, drinking and industrial 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.

Ball valves LD are used in pipelines for the transmission of a wide variety of media: water, gas, oil products, etc. The material for the manufacture of the body are structural steel grades, such as, for example, 09G2S, Art. 20, stainless steel 12X18H10T, etc. ) and stem made of stainless steel 20X13, 40X13. These elements are sealed with elastomer, fluoroplast-4 plastic.

The connection of the LD ball valve to the network is carried out both by welding and in other ways: if it is flanged, then using flanges, if it is coupling, then using a thread. The tightness standard of the valve gate LD corresponds to class A in accordance with GOST 54808-2011. By climatic version steel ball valves LD for welding can be manufactured both for operation in a temperate climate (category U) and in cold (category HL) in accordance with GOST 15150-69.

The products in question can be controlled by an ordinary handle, some kind of gearbox, as well as a pneumatic or electric drive. Ball valve LD flange must perform its functions at temperatures of -60 ... +200 ° C and -40 ... +200 ° C, depending on its version. Service life is set at least 3 years. Our company supplies steel ball valves LD to consumers in any quantity in a short time.

Depending on the design of the crane, it can be used in various categories of climate, most often it is a temperate climate and a cold climate. The tightness of the gate design according to the standard, corresponding to class A, provides LD ball valves with high quality during many years of operation.

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: fluoroplastic F4K20 (PTFE+C, Teflon) with a backup seal 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.