Check valves are automatic shut-off valves that are commonly used for preventing backflow or drainage in a piping system. Often applied on the discharge side of pumps, check valves prevent the system from draining if the pump stops and protects against backflow, which could harm the pump and/or other equipment.
Note: This valve is intended for liquid service that does not exceed 10 ft/sec. It is designed for steady flow conditions and is not recommended for use in reciprocating pump, compressor or other type of physical/thermal shock-load applications. This valve is not recommended for steam service or flow media that contains solids. It should be installed at least five pipe diameters downstream from any turbulence producing components. Flow straighteners may be required in certain applications.
Features
- Designed for Long Service Life: Utilizes straightening vanes that reduce turbulence in incoming flow, thus minimizing noise, vibrations erosion, cavitations, and other factors that could result in premature valve failure
- Minimal Head Loss: Head loss is minimized by providing a large cross-sectional area which exceeds that of the adjacent pipeline - Additionally, the spring-loaded, center guided disc is designed with very low cracking pressure which reduces the amount of energy required to open the valve
- Quick Closure to Reduce Water Hammer: Silent shut-off is achieved via the fully automatic, spring assisted disc that closed near zero flow velocity - The lightweight, center guided disc design creates a positive shutoff prior to flow reversal and helps to keep slamming and surges to a minimum
- Resilient Soft Seats: Soft Seats (Nitrile Rubber & Viton) combined with precision machined sealing surfaces allow the CV 90-DI to maintain a bubble seal that meets AP 598 leakage requirements - Metal seats can also be furnished
- Versatile Design: Sizes 2 - 6 in. utilize a unique scallop design that permits dual pressure service (ASME Class 150 and 300) - Sizes 8 - 12 in. are only rated for ASME Class 150
Specifications
- Sizes: 2 - 8 in. - Larger sizes available - Please call for more information
- Type: Wafer - Center Guided
- ASME Class: 150/300
- Body: Ductile Iron (ASTM A536)
- Trims: Stainless Steel
- Seat: Viton
- Pressure/Temperature Rating:
- ASME Class 150 (2 - 12 in.): 250 PSI @ 100°F
- ASME Class 300 (2 - 6 in.): 640 PSI @ 100°F
- Low Cracking Pressure: 1/2 PSI
- Seat & Gasket Temp. Range:
- Nitrile Rubber: -20 - 250°F
- Viton: -40 - 400°F
- Stainless Steel Spring Temp. Rating: 450°F
- Referenced Standards & Codes: ASME B16.42 - Ductile Iron Pipe Flanges and Flanged Fittings; ASME B16.5- Pipe Flanges and Flanged Fittings; MSS SP-6 - Standards Finishes for Connecting-end Flanges; MSS SP-25 - Standard marking System for Valves; MSS SP-125 - D.I., In-Line, Spring Loaded, Center Guided Valves; FM Approvals Class 1230 - Anti-Water Hammer Check Valves (2 - 12 in.)
- Markets: Oil & Gas Production, General Industry, Chemical, Petrochemical, Power, Food & Beverage
Downloads
Globe Style - Silent Check Valve Installation - Operation - Maintenance Guide (PDF Download)
