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Hastelloy Gate Valves

https://www.wsv-valve.com/products/hastelloy-gate-valves.html

Hastelloy contains ultra-low carbon and high Ni, Mo and Cr elements, which belongs to corrosion-resistant and high temperature-resistant materials.

 Our product has been applied in the severe industrial environment of chemurgy industry, nuclear facilities, chemical industry, bio-pharmaceutical industry and so on.

 Advantages Of Hastelloy Gate Valves

As a valve maker, we manufacture Hastelloy valves in various material, rating and dimension, according to your specifications. Our adherence to strong values has made our brand stand up amongst the others.

 Application Of Hastelloy Gate Valves

 This manual regulating valve can be used in the Petroleum chemical industry; Bearing corrosion resistance, uniform corrosion resistance and intergranular corrosion resistance.

 Inorganic, Organic and Mixed Acids, High performance of corrosion resistance

 Industries requiring high thermal stability and processability can use this industrial gate valve, such as agriculture, nuclear facilities, bio-pharmaceutical industry, etc.

 Seawater Desalination;  bearing excellent corrosion resistance.

 Pulp and Paper, high performance of heat stability and machinability  

 Aerospace industry, bearing high temperature resistance

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Hastelloy Check Valves

https://www.wsv-valve.com/products/hastelloy-check-valves.html

Weidouli offers a comprehensive range of Hastelloy check valve for all types of applications and industries including ressure seal check valve, Hastelloy dual plate check valve, Hastelloy nozzle check valve, Hastelloy single plate check valve, Hastelloy lift type check valve and Hastelloy swing check valve.

 Material Definition Of Hastelloy Check Valves

Hastelloy is a nickel-molybdenum alloy. It contains ultra-low carbon and high Ni, Mo, and Cr elements, which belong to corrosion-resistant and high temperature-resistant materials.

 There are many different grades of Hastelloy, many of which are nickel-chromium-molybdenum alloys. Each of these grades has been optimized for a specific purpose, but all of them are highly resistant to corrosion.

 Material Features Of Hastelloy Check Valves

Excellent corrosion resistance in the strong corrosion oxidative and the reducible acid medium.

 Applications of Hastelloy Check Valve

In general, Hastelloy check valves are mainly applied for liquids, air, or gases. By the way, a Hastelloy check valve is only used to clean filtered or strained liquids or gases. To achieve the Hastelloy check valves clean from dirty, you can put a strainer with a good wire mesh at the head of the Hastelloy check valves. In addition, the valves are applied to serve for vacuum relief. The internal threads side of the valve is linked with the valve service.

 Features of Hastelloy Check Valve

A Hastelloy check valve is made of titanium or alloy 20 for the body, piston, spring as well as locknuts.

 The seal of Hastelloy check valves is tight with the soft material of PTFE.

 Hastelloy check valves are tamper-proof because they can not adjust or remove externally to alter the pressure set once all the systems settle down. You can adjust the pressure setting into a factory set under certain circumstances.

 To reach the goal of a different pressure range, spare springs are able to adjust in the field.

 Operation of Hastelloy Check Valve

Although a Hastelloy check valve is designed for a specific cracking pressure in the factory, it can be set in the field by removing the check valve from the piping system. Operating the right cracking pressure needs some tries and measurements. You also need a pressure gauge to verify the pressure. To achieve an ideal pressure state, Hastelloy check valves remain unscrewed from the mounting place. A Hastelloy check valve can increase the crack pressure by removing the line.

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Hastelloy Ball Valves

https://www.wsv-valve.com/products/hastelloy-ball-valves.html

Hastelloy ball valves contain ultra-low carbon and high Ni, Mo and Cr elements, which belong to corrosion-resistant and high temperature-resistant materials. Hastelloy ball valve is well known for good machinability, although the alloy work hardens as is true of the nickel base alloys in general. We manufacture hastelloy ball valves in various rating and dimension, according to your specifications.

 Corrosion Resistance Characteristics of Hastelloy Ball Valves

 Flow resistance is small, the hand ball valve is the smallest of all valves, even if the reduced bore ball valve, its fluid resistance is quite small.

 Good sealing performance. The hand operated valve seat is generally made of PTFE and other elastic materials, easy to ensure that the seal, and the sealing force of the ball valve increase with the increase in media pressure.

 The valve stem seal is reliable. When the ball valve opens and closes, the stem only makes a 90° rotation movement, so the packing seal of the stem is not easy to be destroyed, and the sealing force of the inverted seal of the stem increases with the increase in media pressure.

 The opening and closing of these types of industrial valve only do 90 ° rotation, so it is easy to achieve automatic control and remote control, the ball valve can be equipped with electric devices, pneumatic devices, hydraulic devices, etc.

 Application of Hastelloy Ball Valves

Petroleum chemical industry.

 Inorganic, organic, and mixed Acids.

 Industries requiring high thermal stability and process-ability, such as agriculture, nuclear facilities, bio-pharmaceutical industry, etc.

 Seawater desalination.

 Pulp and paper.

 Aerospace industry.

 Operation of Hastelloy Ball Valves

It is necessary to find out that the upstream and downstream pipelines of the Hastelloy ball valves have indeed relieved the pressure before the disassembling operation can be carried out.

 The bolts on the flange must be tightened symmetrically and gradually during assembly.

 When the Hastelloy ball valves are disassembled and reassembled, care must be taken to prevent damage to the sealing surface of the parts.

 New parts of the Hastelloy ball valves also need to be cleaned before assembling.

 Metal chips, fibers, grease (except those specified for use), dust, other impurities, foreign objects, etc., should not be allowed to contaminate, adhere or stay on the surface of the parts or enter the cavity during assembly.

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Globe Valves

https://www.wsv-valve.com/products/globe-valves/

A Globe valve is a linear motion valve and is primarily designed to stop, start and regulate flow. The disk of a Globe valve can be totally removed from the flow path or it can completely close the flow path. Globe valves are named for their spherical body shape with the two halves of the body being separated by an internal baffle. This has an opening that forms a seat onto which a movable plug can be screwed in to close or shut the valve. In globe valves, the plug is connected to a stem which is operated by screw action using a handwheel in manual valves. The globe valve must be installed in proper relation to the media flow as indicated by the flow direction arrow on the valve body.

 The principal variation in Globe-valve design is in the types of discs employed. Plug-type discs have a long, tapered configuration with a wide bearing surface. This type of seat provides maximum resistance to the erosive action of the fluid stream. In the composition disc, the disc has a flat face that is pressed against the seat opening like a cap. This type of seat arrangement is not as suitable for high differential pressure throttling.

 Maintenance of Globe valves is relatively easy, as the discs and seats are readily refurbished or replaced. This makes Globe valves particularly suitable for services that require frequent valve maintenance. Where valves are operated manually, the shorter disc travel offers advantages in saving operator time, especially if the valves are adjusted frequently.

 Advantages Of Globe Valves

 Good shutoff capability.

 Moderate to good throttling capability.

 Shorter stem travel between the open and closed positions as compared to a gate valve.

 Available in many patterns, each offering unique capabilities.

 Easy maintenance, as the discs and seats are readily refurbished or replaced.

  Globe Valve Body Patterns

There are three primary body patterns or designs for Globe valves, namely:

 Standard Pattern (also known as T Pattern or Z Pattern)

 Angle Pattern

 Oblique Pattern (also known as Y Pattern)

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Gate Valves

https://www.wsv-valve.com/products/gate-valves/

Gate valves are used to cut off or connect media transmission, and are suitable for pipeline systems in petroleum, chemical, thermal power plants and other industrial fields. Gate valves can only be fully opened and disconnected in the pipeline, which means it cannot be used for regulation and throttling. Gate valve provides well on/off or shuts off features, pressure drop during operation is very less, and is bidirectional. Meanwhile as metal to metal seat, these valves can respond to specific operating high pressure, high temperature operating conditions.

 Industrial Gate Valve Advantages

 1. Flexible or solid wedge

 2. Full-bore or reduced-port

 3. Replaceable seat or integral seat

 4. Bolted bonnet or self sealing bonnet

 5. Rising Stem

 Rising stems are fixed to the gate and they rise and lower together as the valve is operated, providing a visual indication of the manual regulating valve position and making it possible to grease the stem. A nut rotates around the threaded stem and moves it. This type of valve has an inside screwed stem and the packing is subjected to wear because of the up and down movement and turning motion of the stem.

 Hand Operated Gate Valve Applications in Industry

Weidouli is a professional industrial gate valve manufacturer and supplier in China. Weidouli provides a variety of industrial wedge gate valves for sale, including many materials such as cast and forged ones (Titanium, Nickel, Monel, Hastelloy, Monel, Inconel, Duplex, Zirconium, Alloy20, 904L, 254SMO, stainless steel etc.), therefore gate valves by the valve maker Weidouli can be used for numerous severe applications.

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Flange

https://www.wsv-valve.com/products/flange.html

Flange is a shaft and shaft connected parts, used for the connection between the pipe ends.

 Normal Flange Type

Integral flange (IF), threaded flange (TH), plate flat-welded flange (PL), butt-welded flange with a neck (WN), flat-welded flange with a neck (SO), socket welded flange (SW), butt-welded ring loose flange (PJ/SE), flat-welded ring loose flange (PJ/RJ), lining flange cover (BL(S)), flange cover (BL).

 Weidouli Flange Type

 Flat-welded flange(PL)

 Plate - welded flanges are the most common type of flanges

 Because of the good comprehensive performance of plate flat welding flange, it is widely used in the chemical industry, construction, water supply, drainage, petroleum, light and heavy industry, refrigeration, sanitation, plumbing, fire protection, electric power, aerospace, shipbuilding, and other basic projects.

 But the rigidity is poor, so it can not be used for supply and demand, flammable, explosive, and higher vacuum requirements of the chemical process piping system and high, extreme harm occasions.

 Sealing surface types are FF and RF.

 Butt-welded flange with a neck (WN)

 WN Flanges are the flange that has a tapered neck and butt-welded with cylinder or pipe.

 Because of the transition structure of the cone neck and the butt welding connection type, the strength and stiffness of the flange are strengthened. And the sealing performance is much better than the flat-welded flange.

 Suitable for high pressure, high temperature, or high requirements for sealing occasions

 The disadvantage is it needs to be forged, So it has a high cost of material and forging.

 Flat-welded flange with a neck(SO)

 The full name of the neck flat welded flange is the neck flat welded steel pipe flange. It is a flange that extends steel pipe and pipe fittings into the flange and connects with equipment or pipeline through fillet weld.

 Normal sealing surface：Face (RF), Concave (FM), Convex (M), Tenon (T), Groove (G), Full plane (FF).

 Advantages: SO flange is also a flat welding flange. It has a short neck, thus improving the strength of the flange and improve the bearing strength of the flange.So it can be used in a higher pressure pipeline.

 Disadvantages: the cost of SO flange is higher than the PL type. And due to the characteristics of its shape, it is easier to knock against in transportation.

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Duplex Globe Valves

https://www.wsv-valve.com/products/duplex-globe-valves.html

The microstructure of the duplex stainless steel globe valve consists of a mixture of an austenitic phase and a ferrite phase. Therefore, the duplex steel has both austenitic and ferritic stainless steel properties.

 The duplex globe valve uses stainless steel which has stronger resistance to corrosion than the commonly used grades of stainless steel valves, namely 304 valves and 316 valves. Duplex stainless steel valves are widely used in various industries such as the chemical industry, seawater desalination, shipbuilding, petrochemical industry, oil, and gas industry.

 Applications Industry Of Duplex Globe Valves

Pharmaceutical Equipment

 Chemical Equipment

 Sea Water Equipment

 Heat Exchangers

 Condensers

 Pulp and Paper Industry

 Off-Shore Oil Drilling Companies

 Power Generation

 Petrochemicals

 Gas Processing

 Specialty Chemicals

 Pharmaceuticals

 Cast steel duplex globe valve is an excellent valve to use for shut-off service and shall be installed in the proper direction as flow arrow marked in the body. Unless other specific, globe valve shall be used for uni-directional seal.

 Grades Of Duplex Globe Valves

Duplex materials are always available with S31803(F51), S32750(F53), S32760(F53), S32205(F60), S32550(F61) etc with relevant casting code ASTM A890/A995 1A, 2A, 3A, 4A, 5A, 6A, 1B, 1C, CD4MCu, CD4CuN, CD3MCuN, CE8MN, CD6MN, CD3MN, CE3MN, CD3MWCuN.

 Advantages of Duplex Globe Valve

With a simple structure, duplex globe valves can be manufactured easily.

 It is convenient to maintain the surface and property of a duplex globe valve.

 The duplex globe valve has greater corrosion resistance in stress corrosion cracking.

 At a rather lower price, duplex globe valves have low friction between the sealing surface and long life.

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Duplex Gate Valves

https://www.wsv-valve.com/products/duplex-gate-valves.html

Duplex stainless steel has the advantages of both ferritic stainless steel and austenitic stainless steel: austenitic stainless steel reduces the brittleness, maintains excellent toughness and weldability; ferritic stainless steel improves the yield strength, intergranular corrosion resistance and chloride stress corrosion resistance.

Features of Duplex Gate Valves

The lower nickel and molybdenum content of the Duplex Stainless Steels as compared to the austenitic grades with similar corrosion resistance, gives the Duplex grades a lower cost. Weidouli provides a whole range of high-class, customizable and innovative Duplex Stainless Steel Valves. Weidouli is a valve maker that can offer Duplex gate valves with different features, contact us to know more!

 Application of Duplex Gate Valves

 The manual regulating valve can be used for oil refining

 The industrial gate valve can be used for fertilizer

 Pulp & paper industry

 Petrochemical engineering

 Devices like Heat exchanger and condensator

 Seawater desalination plants

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Duplex Check Valves

https://www.wsv-valve.com/products/duplex-check-valves.html

Weidouli offers a comprehensive range of Duplex check valves for all types of applications and industries. As for dual plate check valves, they have JB/T 8937  & API 594  design, wafer type. As for the end connections: Flange RF, Wafer & Lug are all standard units.

 The other available type of Weidouli Duplex check valves includes Duplex pressure seal check valve, Duplex nozzle check valve, Duplex single plate check valve, Duplex lift type check valve, Duplex swing check valve.

 Material Definition Of Duplex Check Valves

Duplex stainless steel is a steel that has half of the ferrite phase and half of the austenitic phase in its quenching structure, and generally, the minimum phase content must be up to 30%.

 Material Features Of Duplex Check Valves

Corrosion Resistance

Excellent general corrosion resistance; superior to Stainless steel in most environments. Excellent resistance to localized corrosion including intergranular, pitting, and crevice corrosion; the CPT of Duplex steel is generally at least 35ºC. The grade is also resistant to chloride stress corrosion cracking (SCC) at temperatures of up to about 150ºC. Duplex steel will often perform well in environments that cause premature failure of austenitic grades. It has better resistance to seawater than Stainless steel.

 Heat Resistance

Although Duplex steel has good high-temperature oxidation resistance, this grade - like other duplex stainless steels - suffers from embrittlement if held for even short times at temperatures above 300ºC. If embrittled, this can only be rectified by a full solution annealing treatment. Duplex stainless steels are almost never used above 300ºC.

 What is the Difference Between a Single Check Valve and a Duplex Check Valve?

A single check valve protects against the risk of backflow and back-siphonage contamination while a double check valve is typically two single check valves linked together. As the name of the two types of check valves suggested, a double check valve seems to function as two single check valves. In fact, a double check valve can provide safe backup if one of the single check valves fails for any reason. What is more, a double check valve even has screws on each side of a single check valve so that the valve port can be opened and cleaned, as debris can build up over time.

 What is a Duplex Check Valve Used for?

A duple check valve is made of a mixture of an austenitic phase and a ferrite phase. With strong corrosion resistance, a duple check valve can be used in various industrial applications such as pharmaceutical equipment, chemical equipment, seawater equipment, heat exchange, power generation, petrochemicals, gas processing, specialty chemicals, etc.