Wafer Dual Plate Check Valves
Class 900 Wafer Dual Plate Check Valve is configured for high-pressure process and pipeline service. Available materials, end connections, operation and inspection options can be matched to the project specification.
Technical Specifications
| Pressure Class | ASME Class 900 |
|---|---|
| Design Standard | API 594 / ASME B16.34 |
| Size Range | 2–48 in |
| Body Materials | WCB, CF8M, Duplex 2205, Super Duplex 2507 |
| Connections | Wafer, Lug, Double Flanged |
| Application Focus | Compact backflow protection with reduced installation weight |
Selection Guide
Class 900 is used for high-pressure process and pipeline service. Typically needs more engineering review than lower classes because end connections, actuation and inspection can change materially. For this valve design, buyers should also review disc motion, hinge or spring behavior, closure response and seat design.
Final pressure-temperature limits, dimensions, operating torque and test values are confirmed against the applicable standard, approved drawing and project specification.
Download a PDF summary with the Class-specific product range, materials, end connections, selection notes and RFQ checklist.
Download PDF DatasheetMaterial Selection
Typical project materials include WCB, CF8M, Duplex 2205, Super Duplex 2507. The correct grade depends on corrosion, minimum and maximum design temperature, toughness, hardness limits and the project material specification.
End Connections
Rtj and bw become more common in demanding piping classes, although final selection must follow the line specification. Available connection families for this product include Wafer, Lug, Double Flanged.
Design & Engineering
For Class 900, pay closer attention to body/bonnet joint design, operating torque, seating load, bolting and actuation. Also confirm orientation, flow direction, allowable pressure drop, closure behavior, body material and end connection.
Pump discharge, compressor discharge, process lines, pipelines and utility systems. Final suitability depends on the actual fluid, design temperature, corrosion conditions, cycling frequency and project specification.
Testing & Inspection
Agree project itp, traceability, pressure testing and specified nde before manufacture.
RFQ Checklist
Use this checklist to prepare a complete enquiry and reduce technical clarification during quotation.
01 · Basic Data
Confirm nominal size, Class 900, quantity, design standard and required delivery basis.
02 · Construction
State body material, trim or seat requirement and the approved end connection: Wafer, Lug, Double Flanged.
03 · Project Requirements
Include process fluid, design temperature, applicable project specifications, inspection level and certification requirements.
Buyer Questions
Provide valve size, Class 900, design standard, body and trim material, end connection, operation, quantity, service fluid, design temperature and inspection requirements.
Typical project options include WCB, CF8M, Duplex 2205, Super Duplex 2507. Final material selection must follow the approved piping class and service conditions.
This product family includes Wafer, Lug, Double Flanged. The correct connection depends on the line class, flange facing or weld preparation in the project specification.
Where the design allows it, gear, pneumatic, electric or hydraulic operation can be evaluated after operating torque, fail action and project requirements are confirmed.
Related Products
Compare other pressure classes in the same valve family or return to the full product range.
