Check valve, non-return valve or one-way valve is a valve that have many kind of type, ex: dual plate wafer check valve, single door check valve etc……, Dual-plate check Valve for a broad range of applications. Double Door Check Valve are designed to automatically prevent back-flow in systems where it permit flow in one way control and prevent flow in the opposite direction. Double Door Check Valve cost-efficient design and non-slam properties. The low weight and short length saves, requires less space, and is easier to install Valve are designed in accordance to API 594 and have dual plate or single plate design.
Dual plate check valve are available in 4 basic connection: Wafer, Lug, Solid Lug, Flanged end, and in an extensive range of sizes, pressure classes and materials. Our double disc wafer type check valve delivery is fast, but the quantity and size will affect the delivery time. Welcome your enquiry from home and abroad.
Dual check valve's body with full rubber lined can effectively reduce disc's leakage probability for the corrosion of sea water. Dual plate check valve are available in 4 basic types: Wafer, Lug, Solid Lug, Flanged end, and in an extensive range of sizes, pressure classes and materials.
Retainerless check valve body; meaning, no penetration through the body wall,eliminating the possibility of outside leakage.Do not have any leakage problem on Body. Dual plate check valve with retainerless are available in 4 basic types: Wafer, Lug, Solid Lug, Flanged end, and in an extensive range of sizes, pressure classes and materials.
Single door check valve can be divided into thin and thick short type and long type. Except for the pressure difference between the two ends, there is no additional sealing force. Single Door Wafer Check Valve is popular with its simple parts, easy maintenance and low price. Suitable for general need to quickly shut down the water source environment, and places with installation space restrictions.
Spring type check valve mainly uses the force of the spring to achieve the purpose of sealing, therefore, the reverse reaction to the fluid is faster, and the fluid can be controlled in the pipeline. TVCCL spring type check valve can be divided into one-piece and three-pieces. Spring type check valve control disc by spring, also known as a one-piece check valve or single spring check valve.3-pcs type check valve has differently thread can be chosen. Spring Type check valves can save the expensive costs of equipment repairs.
Cast Iron dual plate check valve, the price is inexpensive, with ordinary strength and good machinability.Our CI material is America standard ASTM A126 CLASS B. Also be similar to FC200, FC250, GG25, JIS-G5501. And low plasticity and toughness. With good shock absorption and absorbs noise and vibration. The fasts thermal conductivity is convenient for smelting. Also, due to low cost and easy rust, most of them are used in alternative pipelines. Cast iron is suitable for use in environments where the fluid is water or normal ambient.
Ductile iron Dual Plate Wafer Type Check Valve, also known as ductile cast iron, ductile iron , nodular cast iron, spheroidal graphite iron, with the advantages of gray cast iron. Our DI material is America standard ASTM A536 65 45 12 and ASTM A395 65 45 15. Also be similar to FCD450, GGG40,JIS-G5502. While most varieties of cast iron are weak in tension and brittle, ductile iron has much more impact and fatigue resistance, due to its nodular graphite inclusions. And with the advantages of gray cast iron, and with a little steel advantage such as high strength, toughness, ductility, hardening, thermal workability, etc.…
Dual plate check valves - WCB, also known as cast steel, carbon steel. This steel has a good welding characteristic, suitable for use in the environment needs seat overlay welding. TVCCL dual plate check valve with WCB material is America standard ASTM A216 WCB. Also be similar to material SCPH2. Carbon steel is an alloy of iron where the main alloying element is carbon. WCB material is most suitable for high-temperature use. The main advantage is the cost – Valve produced from carbon steels provide a cost-effective solution in environments where other factors are considered less important than cost. The disadvantage is poor corrosion resistance. This can be overcome by surface protection such as paint, provided that the line media does not corrode the valve from the inside.
CF8-304 of dual plate check valves is an economical and practical choice for most environments, also it is one of the common forms of stainless steel used around the world. It is a good choice for low budget’s project and longevity. Our CF8 material for double plate check valve is is America standard ASTM A351 CF8. Also be similar to material SCS13 and 1.4308. Its high quality and durability ensure that your product lasts a long time.304 can withstand corrosion from most oxidizing acids. However, 304 doesn’t have the chloride resistance of 316. It is susceptible to corrosion from chloride solutions.
CF8M-316 is also the common form of stainless steel check valves. It has almost the same physical and mechanical properties as 304 stainless steel 316 stainless steel differ from 304 is the addition of molybdenum, an alloy which drastically enhances corrosion resistance, especially for more saline or chloride-exposed environments. Our CF8M material is America standard ASTM A351 CF8M. Also be similar to material SCS14 and 1.4408. The slightly higher price point of 316 is well worth it in areas with low chloride exposure, especially space where near the coast and salted area.
Aluminum bronze - C95800 offers superior saltwater and seawater corrosion resistance. It is especially suited for marine applications with optimum resistance to seawater corrosion. C95800 material of TVCCL dual plate wafer check valves is America standard B148 C95800. Also be similar to the material ALBC3. Aluminum Bronzes are a family of copper-based alloys that use iron and nickel in their chemistry - but rely on aluminum as the principal alloying element. Aluminum significantly adds to the strength to the point that it is similar to that of medium carbon steel. The additional advantage is that aluminum bronze also possesses excellent corrosion resistance. It is that strength and corrosion resistance that gave rise to the widespread use of aluminum bronze. Besides, along with this high strength alloy is excellent for welding and it can effectively lower the cost to the project, such like desalination project...etc.
The "Duplex stainless steels" are a family of stainless steels. These are called duplex (or austenitic-ferritic) grades because their metallurgical structure consists of two phases, austenite (face-centered cubic lattice) and ferrite (body centered cubic lattice) in roughly equal proportions. Generally a small amount is not less than 30%. Due to the presence of ferrite and austenite in the duplex stainless steel. Therefore, it has the advantages of higher strength of ferritic stainless steel, resistance to chloride stress corrosion, and excellent toughness of austenitic stainless steel. Duplex stainless steel is more resistant to corrosion than the most common stainless steel valves, CF8 and CF8M. Duplex stainless steel valves are widely used in various industries such as chemical industry, seawater desalination, shipbuilding industry, petrochemical industry, oil and gas because of their extremely corrosion resistance and high strength.
The dual plate wafer type check valve are manufactured in accordance with API, ASTM, ANSI, JIS, AWWA, ISO or other international standards. It is economical on installation and maintenance because installation is simple. It is ideal type for cost saving. Our delivery for fast delivery is in 3-7 days. (Depends on our current stock.) We have the ability to design and our own molds. If you have special dimension, we can make customized check valve.
When choosing a double disc wafer type check valve it is important to make a cost-benefit analysis of the specific system. Often focus is to reduce cost and at the same time obtain the lowest possible pressure loss. CI and DI is cheap material, we chose short face to face standard to make wafer pattern twin plate check valve for cost saving. Compact design with short face-to-face dimensions minimizes space requirements. CI is a good material choice in normal working conditions and low pressure.
The dual plate wafer check valve is similar to the swing check valve and a little better in terms of closing because of the coiled springs that assist the two cantilevered doors in closing more quickly. Use of wafer pattern twin door check valve is popular in liquid services. Its lightweight and compact construction make it a preferable choice when space and convenience are important. It is 80 to 90% lighter than conventional full body check valve. The cost of installation and maintenance is very low compared to other types.
Our dual plate check valves conform to all industry standards. API 594 dictates valve dimensions, including wall thickness, face-to-face dimensions and OD, so valves can replace any make of ANSI dual plate water check valve. WCB material is cheaper than CF8 and CF8M and has good welding performance which is suitable for the environment where valve seat surfacing is required. If the body seat and plate seat are required for surfacing, WCB material is a good choice.
Dual plate check valves are self-automated, so they don’t need any form of manual assistance to help them open and close. Used in a variety of liquid and gas applications to prevent flow reversal and associated surge and water hammer, these double disc wafer type check valves are designed for vertical and horizontal flow applications. Double disc wafer type check valves are available in a range of configurations and sizes, including compact dimensions for limited spaces -- as well as multiple pressure classes and material construction. Dual plate wafer non-return valves are found in just about any type of facility from industrial plants to homes. They help to prevent reverse flow of fluids and gases within a system. Simply put, their sole purpose is to keep fluid flowing forward.
Aluminum-Bronze material of dual plate check valve is suitable for seawater or a little bit corrosive environment, also Aluminum-Bronze does not need the minimum order quantity. Aluminum-Bronze material is usually used in dual plate wafer type check valve with full rubber. And the valve body can be cast iron A126 class B or ductile iron A536 65-45-12 to reduce costs.Dual plate wafer type check valve with full rubber can resist the corrosion of seawater.
By-pass valves are generally used for three basic reasons:To allow the pipeline differential pressure to be balanced, lowering the torque requirement of the valve and permit one-man operation. With the pump closed and the by-pass open, a continual flow is allowed, avoiding possible stagnation. Delayed filling of pipelines.The bypass valve produced by TVCCL is a dual plate wafer type check valve with a hand-wheel to adjust the water flow and achieve dredge effect. It is very simple to use the hand-wheel to control valve to open and close. The installation method is the same as the dual plate wafer type check valve. The only difference is the hand-wheel. The advantage of using the hand-wheel to control the pressure difference is that without external power, and the pressure of the system itself is actuated, which effectively improves the operational safety and more reliable than the conventional electric control valve. Also, the price of the bypass valve is lower than the electric control valve.
Because the check valve flange type doesn’t tapping on the flange hole, installation of double door flange type check valve is simpler than double door lug type check valve TVCCL valve is an ISO 9001 accredited and CE certified manufacturer of Dual Plate Check Valves with design features as per API 594 Standards Double door flange type check valves we have standard retainerless design too. We take our commitment to product quality and documentation seriously. We provide only the best to our customers.
Dual plate flange type check valve is pressure tested in accordance with API 598 Dual plate flange type check valves are designed to comply with the requirements of API 594, ASME B16.34 the ASME code and special customer requirements as applicable Double-flanged valves shall only be supplied where nut space between flanges is adequate. Unless otherwise specified in the purchase order, the bolt holes will be through-drilled. Flange type dual plate check valve’s OD designed in according to ASME B16.5,AWWA C209,MSS SP-44 specifications.
Flange type dual plate check valve suitable for use in countries with a lot of earthquakes or in environments where there will be vibrations. The quick-close action prevents the medium from flowing back and eliminates water-hammer effect. This dual plate check valve is short in length, so that it is rigid and easy to mount. It is easy to install on pipeline which is laid horizontally or vertically. The stem of the valve should be perpendicular to the horizontal level when the dual plate check valve is mounted on horizontal pipeline. For vertical installation the direction of flow should be downward.
The dual plate lug type check valve only takes 15-20 minute completely dissemble and reassemble or less. In general, the flange holes of dual plate lug type check valves have tapping. Lug type check valves are furnished with thru-hole bolting in accordance with ASME, JIS, ISO, MSS and AWWA…etc. Threaded bolt holes are available when specified. A metal-to-metal leakage rate of 1cc/minute/inch diameter can be provided at no extra cost if specified with customer enquiry/order. Note: API 598 specifies 3cc/minute/inch diameter with water.