Ball valve ld. Cranes LD
Stopcock ball design has become an indispensable alternative to valves for a number of reasons: the flow in the pipeline is quickly adjusted, high degree tightness, suitable for aggressive substances. One of the most reliable manufacturers in this area is the Chelyabinsk Spets Citizen Stroy company, whose brainchild is LD flanged ball valves. The company's products are known for their durability and operational reliability. The manufacturer is strict about his work. In each batch, the LD steel ball valve is tested for compliance with the established standards. Only verified batches are sent. This guarantees the quality of operation of each device. Our company offers big choice of these products, in the catalog you can select a steel flanged ball valve LD suitable type and load level.
Purpose and features of the ld steel ball valve
Manufacturing material – steel. This is a durable metal that is not damaged by various aggressive environments. Steel can withstand mechanical loads, including water hammer. For these and other reasons, the LD flanged steel ball valve is suitable for installation in gas, oil, heat and water supply systems, and in food industry workshops. The only exceptions are those environments that are aggressive specifically for steel. The design of products in this category allows maintaining good tightness. The LD steel ball valve, unlike other types of shut-off equipment, has a valve element in the form of a sphere. It lacks any mounting holes, which creates a continuous overlap in the pipe. The design also includes additional sealant. Therefore, LD flanged ball valves have increased tightness of transportation products. The property is maintained even under dynamic loads in the pipeline.
The seal quality classification of the valve is category “A”, this 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. This also corresponds to the sealant used. The valve element is supplemented with fluorosiloxane elastomer and fluoroplastic. Due to the tightness class and type of seal, the LD steel ball valve can be installed in industrial pipelines. Since it maintains tightness in unstable working environments. The device is more durable and stable flange type connections. In the store there are LD ball valves in all available varieties. The products correspond to the standard pipe range. They are designed for standardized pipe sizes. Therefore, you can buy an LD steel ball valve for any type of pipeline.
Range of ld cranes in Gremir
The products are easy to install and maintain. But they differ in some ways technical specifications. In our catalog you will purchase LD ball valves of the following varieties:
- Standard bore type of design. The diameter of the ball hole is one size smaller than the diameter of the pipe. LD steel flanged ball valve is suitable for installation in systems in which a small percentage of pressure loss is allowed.
- Full bore 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 full closing without any clearance. There is no product leakage in the system. Complete shutoff of liquid, steam or gas is ensured. LD flanged valves are suitable for industrial mains. The type of device determines 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 sealed. Choose an LD ball valve from the catalog of our store. A description of the parameters will help you choose required diameter and product size. We have affordable prices for LD ball valves and a large selection of products. We organize delivery of your order throughout the Russian Federation. You can find out more details on the website. To buy a steel ball valve LD, leave a request.
ChelyabinskSpetsGrazhdanStroy LLC is Russia's largest manufacturer of steel all-welded ball valves, produced since 2003 under the LD brand.
Ball valves LD is a shut-off and shut-off and control valve that 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.
LD ball valves are used on industrial and process 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 nominal diameter 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, welded, with polyethylene pipes for welding to HDPE pipes, as well as combined. Small diameter taps may also have threaded connection. LD taps of large diameters can be produced in several versions with different construction length, including "locked". Some models designed for transporting liquid media have a bleed valve to remove air from the pipeline.
Cranes large diameter are equipped with a gearbox; products designed for installation of an electric drive are also produced.
LD ball valves can be installed on the pipeline in any position - both horizontal and vertical. The permissible temperature range can be from -60°C to +200°C (for taps in a special climatic design). The operating 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 medium temperature.
Depending on the purpose, the body material is steel of various grades: St.20, 09G2S or 12N18X10T. The body of all LD valve models is all-welded, there are no bolted joints, which significantly increases the resistance of the shut-off valves to dynamic loads. Welding of housings is carried out automatically in an environment of inert gases, which eliminates the heterogeneity of the weld. In addition, the design of LD cranes does not use cast elements, as in most analogues, but those made by cold stamping.
The key to the quality of products of ChelyabinskSpetsGrazhdanStroy LLC is the constant monitoring of materials and workpieces at all stages of production of LD ball valves, as well as mandatory testing of each ball valve LD on test benches according to GOST 9544-93"Pipeline shut-off valves. Valves tightness standards."
The average service life of ball valves is 10,000 opening and closing cycles, the estimated service life is about 25 years. The manufacturer provides a three-year warranty for each product.
Ball valves LD are used in pipelines for transmitting a wide variety of media: water, gas, oil products, etc. The material for the manufacture of the body is grades of structural steel, such as, for example, 09G2S, st.20, stainless steel 12Х18Н10Т, etc. The LD ball valve has an actuator (ball ) and rod made of of stainless steel 20X13, 40X13. These elements are sealed with elastomer, fluoroplastic-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 threads. The tightness standard for LD faucet valves corresponds to class A according to GOST 54808-2011. According to climatic version LD steel ball valves for welding can be manufactured both for use in temperate climates (category U) and in cold climates (category HL) according to 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 flanged must perform its functions at temperatures of -60...+200 °C and -40...+200 °C, depending on its version. The service life is set to be at least 3 years. Our company supplies consumers with LD steel ball valves in any quantity in a short time.
Depending on the design of the faucet, it can be used in different climate categories, most often it is a temperate climate and a cold climate. The tightness of the valve design according to the standard, corresponding to class A, is ensured by LD ball valves high quality with many years of use.
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On Russian market there is a large selection of shut-off valves pipeline fittings: valves various designs, valves, flaps, butterfly valves, etc. However, in last years More and more consumers are giving their preference to ball valves.
LD ball valves have a long service life (5-10 years). This undeniable reliability is ensured by constant monitoring of ball valve workpieces and materials throughout the entire production process. Each LD steel ball valve is tested for valve tightness and body strength on special test benches. Testing of taps is carried out in accordance with GOST 9544-93, which sounds like “Pipeline shut-off valves. Standards for tightness of valves."
Places for installation and operation of LD ball valves can be housing and communal services pipeline systems, water pipelines, pipelines for transporting oil, gas and petroleum products.
The LD steel ball valve has proven itself as a reliable shut-off device that has a high-quality seal of the stem-neck assembly, the seats in the ball valve are additionally spring-loaded, and there are also duplicate seals on the seats, the material of which is coke-filled fluoroplastic made from fluorosiloxane elastomer.
Using ball steel cranes LD can reduce costs for maintenance pipeline systems. This is achieved through the use of all-welded technology in the manufacture of ball valves. The result is that such a ball valve is durable and reliable. In the manufacture of LD ball valves, the method of squeezing blanks by cold stamping is used. For the production of KS, the material used is pipe elements from various metallurgical plants. As a result of all of the above, various leaks do not occur working environment, and this happens if bolted connections are used in the design of other ball valves, maintenance is not required and the availability of spare parts and structural elements is also not required various instruments for repairs and training programs.
Advantages of LD ball valves:
All-welded body
The all-welded body of the LD ball valve does not have any bolted connectors on the body through which leakage is possible under dynamic loads of the pipeline. The ball valve does not use cast elements, as in most types of shut-off valves, but cold-formed blanks made from the pipe assortment of the largest domestic metallurgical plants.
Strength
The body of the LD ball valve consists of a central welded spherical part (body) and cylindrical end connections (nozzles). The spherical forged design, which does not have bolted connectors, allows it to withstand the maximum with minimum wall thickness and minimum weight. operating pressure and provide maximum load resistance.
Tests
Each LD ball valve undergoes the following acceptance tests
1. for air tightness Rpr 6 kgf/cm² at t?+ 20?C
2. for strength and density with water:
* for Ru 1.6 MPa - Rpr 24 kgf/cm²
* for Ru 2.5 MPa - Rpr 38 kgf/cm²
* for Ru 4.0 MPa - Rpr 60 kgf/cm²
No maintenance required
Since the LD ball valve has a long service life, rugged all-welded construction and no packing seals, it requires no maintenance or spare parts. Thus, there is no need for training programs, special tools and equipment for repairs, or storage of spare parts.
High speed of shutting off the flow of the working medium
The LD ball valve is opened or closed by turning the handle 90°, and more than ten full revolutions of the handwheel are required to open or close the valve.
The small (compared to gate valves) weight parameters of LD ball valves ensure minimal load on the pipeline.
Ease of Management
At high pressures and when the seal is tightened tightly, opening and closing the valves is very difficult due to the small diameter of the flywheel, which leads to the use of additional improvised means. It takes several full revolutions of the flywheel to open or close. The ball valve can be easily opened or closed by turning the stem 90°. In this case, it is possible to visually determine whether the tap is open or closed.
Temperature resistance of ball valve
Temperature resistance of the ball valve is up to 180°C. A valve (valve) with a rubber seal allows only 70 °C, and a cone valve - no more than 80 °C.
Optimal price-quality ratio”
The price of the valve is slightly lower than the price of the LD ball valve, but the installation and maintenance costs of the valve are significantly higher than the similar costs for the ball valve, which, combined with the high cost of repairing the valve, allows us to conclude that economic efficiency use of LD ball valve.
The LD brand ball valve has two internal diameter standards: standard bore and full bore. The LD standard port steel valve has inner diameter the holes in the ball are one GOST size smaller than the diameter of the attached pipe. The dimensions of the hole diameter of a full bore valve coincide with the diameter of the pipe, which entails large dimensions, weight and price of the product.
The rod in the product can be considerably extended, which is convenient if access directly to the tap is limited due to the installation features of the system. Also, the LD steel ball valve can be ordered with a mechanical gearbox, which is suitable for valves of large diameters and high pressures.
Materials
LD brand ball valves use a unified set of materials in their design. The body of the part is made of steel 20, cold-resistant 09g2s or stainless steel 12x18n10t. The rod and ball are made of stainless steel 12x18n10t or 20x13. The rod is sealed with fluorosiloxane elastomer, and the ball is sealed with the same plus for double protection with fluoroplastic. The LD brand ball valve is equipped with a handle with a polymer tip.
Types of fastening
The company's ball valves are available in three main mounting forms: flanged, socket and welded, and LD also offers combination-mount valves and drain valves. The LD steel flanged ball valve is distinguished by high reliability and removable connections. Installation of such a crane is advisable in rooms where there are restrictions on welding, on production lines that require periodic dismantling and maintenance of the pipeline system. Flange valves are available up to diameter sizes of 600-700 mm.
A valve with a welded connection is relevant when maximum tightness is required. This type is in demand on main pipelines, in systems with a large passage diameter, as well as in conditions where water hammer cannot be ruled out. pipeline system. Welded taps can be purchased with a diameter from 15 to 600 mm.
The coupling connection is presented for taps with a diameter of up to 80-100 mm, depending on the design for gaseous or liquid media. This is due to the expectation of lower medium pressure and reduced sealing qualities. The advantage of these valves is easy assembly with a pipeline, simple disassembly and reusability.
The flanged ball valve in the LD brand is also available with a combined mount, where there is a flange on one side and a welding connection on the other. This connection is very convenient when moving from main pipeline to the local production line system.
The choice of a specific crane model must be carried out as carefully as possible, given that the cost of an accident if the wrong choice is made can be very high.