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.
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.
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 dredging 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.
The dual Plate Check Valve is an all purpose non return valve that is much stronger, lighter in weight and smaller in size compared to a conventional swing check valve or life check valve. Dual plate check valve has cylindrical body which makes the valve look like any other pipe fitting. A cylindrical body has much more uniform distribution of stress compared to a conventional swing check valve. A cylindrical body of the pressure containing part of the Dual Plate Check Valve can be designed to withstand extreme much to the weight (thickness) of valve. Thus for severe/ rugged loading conditions, these valves have a distinct edge over the conventional valves both in terms of safety and economics besides general versatility.
Lug type dual plate check valve suitable for use in countries with a lot of earthquakes or in environments where there will be vibrations. The dual plate lug type check valve only takes 15-20 minute completely dissemble and reassemble or less. Seat Leakage: Our products- dual plate check valve is tested to API-598 which has a metal to metal seat permitted seat leakage of 3 c.c./inch when use hydrostatic test. And if we use pneumatic test is according to API-598 which has a metal to metal seal permitted seat leakage of 700 c.c./inch. In general, the flange holes of dual plate lug type check valves have tapping.
Double disc lug type check valves are designed to ASME, JIS, ISO, AWWA...etc. specifications and conform to API 594. Double disc lug type check valves are tested to API 598 standards. Dual plate lug type check valves are normally with Buna-n, Viton, EPDM, and metal seats. Our twin plate wafer check valves conform to all industry standards. API 594 dictates valve dimensions, including face-to-face dimensions and out dimensions, so twin plate wafer type check valves can replace any make of ANSI Dual Plate Water Check Valve.
Dual plate check valves cheap to Install than swing check valve: Traditional flanged swing check valve are heavy and therefore requires special foundations or supports which are expensive, dual plate check valve on the other hand are relatively light and shall be hung directly on the pipe without any support whatever. Most of traditional swing check valves will not close properly in case of the heavy disc will hang slightly open, and the plates in the dual plate check valves are so light and are maintained in the close position by a spring, so the dual plate check valves may be mounted in any position from horizontal to vertical.
It is named the Lug type check valve is because the shape is like the ear. Full Lug type dual plate check valve is suitable for the environment where the space is small, because the flange hole has tapping, it can save the space occupied by the nut and the cost of the nut. Full Lug design dual plate check valves are more popular than swing check valves because they have a low slamming effect. The advantages of a dual plate full lug type check valve compared to a swing check valve are not limited to space saving and lower slamming rate. The total cost of a dual plate full lug type check valve including the sum of initial cost, maintenance cost, and energy cost, is less than a swing check valve. Full Lug design dual plate check valves are automatic valves that open with forward flow and close against reverse flow.
Dual plate wafer type check valve with full rubber is usually used in seawater desalination system. Usually we chose iron body and aluminum bronze disc to complete the valve. Dual plate wafer type check valve with full rubber don’t need MOQ. Dual plate wafer type check valve with full rubber can applied in the sewage industry, sea water treatment and desalinization project, and etc.
Full rubber dual plate check valve is lined with rubber, which has a better waterproof and slip-proof effect than the other valves. Without any leakage under normal circumstance. Commonly used in environments with high salinity content, desalination or coastal areas. Save costs and reduce space requirements: We have many kind of body materials to choose, but the basic materials are CI and DI. In the face to face specification, we use the shorter face to face specification EN-558 to save costs, short face-to-face dimensions minimizes space requirements. In addition, the body material can also be selected by WCB.CF8.CF8M, etc. There are two options standard for EN558 and API594.