This design is available on all our full port check valves. Dual plate wafer check valve the short facetoface design makes dual plate check valves more compact and lighter, providing easy installation and less expensive costs than conventional swing check valves. Check valve, ductile iron, asme class 150, single disc swing type wafer type. Dual plate check valve range goodwin international is the market leader in the design and manufacture of dual plate check valves for use in the worlds hydrocarbon, energy and process industries upstream, midstream, downstream. Both serve to block back flow from occurring in a pipe line.
Cv122 dual plate check valve is a general purpose and one way flow valves that is stronger, lighter and more reliable than conventional swing check valves. Retainless wafer type dual plate swing check valve. This valve is mainly suitable for urban, industrial and high. Patented slim plate design giving improved flow efficiencies and superior metaltometal seating shutoff. It is different from the twoway check valves sometimes erroneously referred to as double check valves used in air brake systems on heavy trucks which select from the highest pressure source. Wafer, flanged, solid lug, buttweld end, hub end, and in an extensive range of sizes, pressure. Lapped seating surfaces that exceed api 598 seat leakage requirements for.
Both use a swinging disc to block and allow flow in one direction. We are known for our unique elastomer design, which provides the lowest pressure drop and highest cv in the industry. Retainerless dual plate check valves for a broad range of applications. Dcw dual plate check is typed of wafer, lug, frange. Light weight reduces weight by 8090% compared to conventional flanged check valves. Wafer check valves goodwin crane mission stockham style. Check valve, stainless steel, asme class 150, short pattern wafer type.
Duochek high performance check valves superior valve co. Scv dual plate check valve design naturally reduces fluid drag allowing easy opening and fast closure with minimal hammering. Titan fci dual plate check valves are designed to provide troublefree service and seldom require maintenance. Dual plate wafer type check valve 1502500lb 11260 dual plate wafer type check valve we are professional manufacturer of valves in taiwan, providing high quality valves, wafer check valve, dual plate check valve, spring check valve. Also available with a lugged body, cv 123b, or flanged body, cv 123c, upon request. This design is standard on all ansi series 125lb through 2500lb valves.
The innovative dualplate design of the duochek employs two spring loaded plates disc halves suspended on a central vertical hinge pin. The abacus twin plate check valve works on the following principle. The dual plate check valve is a multipurpose valve that is stronger, lighter and smaller compared to conventional swing check or lift check valves. Our wafer pattern dual plate check valve offers excellent sealing capabilities for both high and low pressures. Durable dual plate wafer type check valve manufacturer. Us valve supplies check valves in a wide variety of configurations and materials. Dual plate check valve features design features the cvi dual plate check valve design api594 and api6d. Available in a wide range of metallurgies, seating materials and options, valmatic is prepared to meet your air check valve needs. Dual plate check valves are more popular than swing check valves in norwegian offshore industry 16. Dual plate wafer type check valve 1502500lb 11260 dual plate wafer type check valve. In all dual plate check valves, the center pin off which the discs rotate and the limiter bar which prevents the discs from hitting each other need to be affixed to the valve body. Chemtrols samil dual plate check valves are manufactured. We have wellmaintained quality management comprising a team of experienced professionals that keeps an eye on. Lapped seating surfaces that exceed api 598 seat leakage requirements for metalseated valves.
The flow of water through a valve at 60f in us gallonsminute usgpm with a pressure drop of. Valve flow coefficients valve coefficient cv and average spring force class 125 300 valve size cv spring force psi in mm. Cv 123a cv 123b cv 123c end connection wafer type lugged type flanged type size 1. Duochek high performance nonslam check valves are the original mission manufacturing company wafer check valves introduced to the market in the late 50s. Class 600 valves are only available with metaltometal metalsealing. The dual plate wafer type check valve are manufactured in accordance with api, astm, ansi, jis, awwa, iso or other international standards. Our dual plate lug type check valve is widely appreciated by the customers due to their longer functional life, reasonable price, and less maintenance. To remove the check valve from the pipeline, first isolate the check valve by shutting off the upstream pump and. Check valves valve suppliers australia braeco sales. Selfseating design that reduces dragging along the seat surfaces. Api 594 ansi dual plate wafer check valves us valve. With a track record of supply spanning over 35 years, goodwin has developed an enviable reputation for. Wafer check dual flap part number system agwasg series.
When it comes to check valves, swing checks and wafer checks are actually similar in many ways. Velan products dualplate check valves proquip wafer. Eighty years ago the specifier had only to pull out a standard swing check valve specification and add it to the system plans regardless of location or application. If removal of check valve is required for inspection, please follow these steps. The compact design features nonslam springassisted closing.
In a standard body style, the result is a penetration through the body wall. A dual plate check valve is lighter and more compact than a conventional swing check valves. The scv designs offers many features and options beneficial for oil, liquid gas, and liquid applications. Pdf comparing dual plate and swing check valves and the. And it is generally stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves. From potable water, to abrasive slurries, and even corrosive chemicals. Separate springs are provided for each door to close.
We are professional manufacturer of valves in taiwan, providing high quality valves, wafer check valve, dual plate check valve, spring check valve. When to use a swing check vs wafer check valve cis blog. When a check valve is needed to prevent backflow, nibco has a complete lineup, including the nibco ring check with selfclosing disc, horizontal swing, sliding disc, silent check and y pattern. Downloads wafer check valves abacus valves abacus valves. Also available with a lugged body, cv123b, or flanged. Dual disc check valves the dual disc check valve with its compact wafer design and low cost have made it a popular choice when space and price are major factors in valve selection. Size 2 to 40 asme pressure class 150 up to 1500 api 6d and api 598 pressure classes wafer, lug, double flanged and extended body design. Valmatic has utilized the same criteria in the design of our seven different check valve lines. It has about 25% the face to face dimension and 15% to 20% the weight of a. Our dual plate wafer check valves are available in sizes up to 60 in carbon steel, 316 stainless steel and ductile iron and in classes 125, 150, 300 and 600. Duochek high performance nonslam check valves crane.
Dual plate wafer nonreturn valves equivalents of techno check valve 5050. A broad range of configurations that includes piston, tilting disc, springloaded disc and dualplate models meets the critical, hightemperaturepressure demands of the worlds major industries. Retainerless dualplate check valves for a broad range of applications. Only nonslam silent check valves are designed this way. Low pressure drop high cv dual plate wafer check valves have larger open area than other designs, thus reducing pressure drop compared to swing, lift or other check valves. Standard compliance is the face to face dimension shall be in accordance with api594, or other standards are available upon request. Api 594 dictates valve dimensions, including wall thickness, facetoface dimensions and od, so valves can replace any make of ansi dual plate water check valve. Spring with valve wide open unstressed spring plate in open position spring with valve closed plate in closed position 140 55. Dpv api 594 dual plate wafer check valves delta pacific valve. A double check valve or double check assembly dca is a backflow prevention device designed to protect water supplies from contamination. Ask us how to spec the right check valve, or get catalogs, chemical resistance guides and submittals. Each of these types has a trim component which swings out of the flow path hence the term swing checks. Today, however, engineers weigh the importance of slamming characteristics, headloss, cost of purchase and cost of maintenance when making an air check.
In the case of axial flow check valves the trim moves parallel to the axis of the flow path. Other retainerless dualplate check valve designs have a. The dual plate check valve is simple in configuration, shorter in facetoface dimension and convenient in installation and maintenance. Leakfree, tight sealing, protection against reverse flow and minimal flow direction changes are at the core of flowserve check valve designs. Sizes, pressure classes and design availability to meet all requirements you need for your applications. Dualplate check valve welco valve company provides dual plate check valves with spring loaded, can significantly reduce water hammer. This valve takes less space in a pipe run where space could be a problem and can be installed in a horizontal or vertical up positions. Check valves low pressure check valve manufacturer u. Check valve dual plate check valve product zhejiang. Dual plate check valves are the vital mechanisms which play a key role in many industrial applications.
Dual plate check valve lvsa group pty ltd pipes, valves. It is economical on installation and maintenance because installation is simple. Southern california valves high quality standards demand. Jul 27, 2017 dual plate check valve welco valve company provides dual plate check valves with spring loaded, can significantly reduce water hammer. Our dual plate check design weighs a fraction of the fullbodied swing or piston check valves. Cast iron dual plate check valve wafer pattern valves online. Duochek high performance nonslam check valves are the original mission wafer check valves introduced to the market in the late 50s. Where increased integrity is required the cv 123 dual plate check valve can be provided with a retainerless design as well. The differences in the two valve may seem obvious when you look at them, but many users dont realize the difference it might make in their application. Dual plate check valves ss flanged end dual plate check.
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