DUO-CHEK II Check Valves
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Duo-Chek II High Performance Check Valves DC 0001-GB-11.01/GP

2 Duo-Chek II High Performance Check Valves Easy to handle, a wide variety of body design, materials and trim Product features: Duo-Chek® II high performance check valve is the original Mission wafer check valve introduced to the market in the late 50’s. They are available in the sizes, pressure classes and configurations you need to meet the most demanding of applications. Our product range includes, but is not limited to, ANSI Pressure Class 150 through 2500 API 6A and 6D pressure classes DIN, JIS, BS, AS, and ISO standards are also available. Wafer, lug, double flanged and extended body...

3 High-quality dual-plate design for a multitute of liquid and gas fluid applications Some of the major markets and typical applications are depicted here. Injection, Oil/Steam Separation, Gas/Oil Gathering Systems, Flowlines, Wellheads Recouvery Service Water Recirculators, Manifold, Terminal Transfer Lines, Barge Unloading Lines, Shipboard Services Plant Blower Discharge, Fire Protection Systems, HVAC Systems Retainerless valves for critical applications without pin retainer penetration through the body are available in Wafer and are standard in Lug and Double Flange valves. Spring action...

4 Leading engineering specifiers specify the Duo-Chek II for check valve applications because it provides high performance. Extensive research and testing with demonstrated performance has earned worldwide recognition, unmatched in the industry. The Duo-Chek II wafer valve design is generally stronger, lighter, smaller, more efficient and less expensive than conventional swing check valves. Its design meets API 594 which is approximately one fourth the face to face dimension and 15% to 20% the weight, on most popular sizes making them less expensive than a swing check valve. lt is much...

5 The innovative dual-plate design of the Duo-Chek II employs two spring-loaded plates (disc halves) suspended on a central vertical hinge pin. As flow begins, the plates open in response to a resultant force (F) which acts as the center of the sealed surface area. The contact point of the reacting spring leg’s force (Fs) acts beyond the center of the plate area, causing the heel to open first. This prevents rubbing of the seal surface prior to normal plate opening, eliminating wear. As the velocity of flow decreases, torsion spring action reacts automatically. This moves the plates closer...

6 Duo-Chek II Configurations Wafer style body valves are designed with flangeless bodies with relatively short face to face dimensions. They are clamped between mating flanges wich are connected by studs and nuts. Size 2. - 72. ANSI Class 150 - 2500 Style G - Wafer Wafer Design The advanced design of the Duo-Chek II valves provides many operational benefits to the user, which combined with its more compact size and lower weight, make this valve types an excellent alternative to standard swing chek valves. Wide size range, pressure range and addes options allow further market needs to be...

Specials / Standards Valve Design: API 594 Valve Pressure Testing & Inspection API 598 Pressure / Temperature ASME / Ratings ANSI B16.34 Pipline API 6D Valves: Production API 6A Valves: 7 Lug Style Valves cover the bolting the entire length of the body. Lug valves are furnished whenever possible to keep weight to a minimum. These valves are standard retainless design. Size 2. - 24. ANSI Class 150 - 2500 Lug Valves Retainerless Design Grayloc® Hub End Valves Valves with Grayloc ends may be furnished for use with hub end, clamp-style connections. These end connections simplify installation...

Crane Process Flow Technologies GmbH P.O.-Box 11 12 40 D-40512 Düsseldorf Heerdter Lohweg 63-71 D-40549 Düsseldorf Phone +49 211 5956-0 Fax +49 211 5956-111 We reserve the right for changes to all technical specifications