Threaded Check Valves (Vertical Spring, Swing, Y-Type; 200 to 1000 WOG, 1/4 to 3 in)

The threaded check valve range covers three designs for small bore backflow protection: in-line vertical (spring loaded lift) check valves in 2-piece and 3-piece bodies, swing check valves and Y-type spring check valves.

All are investment cast in CF8, CF8M or WCB and supplied with female threads to NPT, BSP or DIN standards; swing and Y-type versions are also available with socket weld ends.

Key features

• 2-PC and 3-PC vertical check valves: spring loaded disc, full port, 1000 WOG (PN63)
• Vertical check valves metal seated, soft seat available
• Swing check valves: swing type disc with precision ground seat, 200 WOG (PN16)
• Y-type spring check valves: PTFE seat, 800 WOG (PN50)
• Threads to ASME B1.20.1 (NPT), DIN 259 / DIN 2999, BS 21, ISO 228-1 and ISO 7-1
• Pressure test, dimension check and PMI test before delivery

Technical data

Materials

• Body and bonnet / cap: WCB, CF8 or CF8M
• Disc: CF8 or CF8M
• Spring: 304 or 316
• Swing type pin: 304 or 316
• Seat (Y-type), gaskets: PTFE
• 3-PC body bolts, washers and nuts: 304

Applications

• Pump and compressor discharge protection
• Water treatment, HVAC and plumbing systems
• Chemical and refinery utility lines, small bore

Standards and certification

Designed to ASME B1.20.1, DIN 259 / DIN 2999, BS 21, ISO 228-1 and ISO 7-1 thread standards, ASME B16.11 for socket weld ends and API 598 inspection (swing type) according to the manufacturer. The manufacturer declares ISO 9001 certification and CE marking; certificates and test reports (API 598 pressure test, material certificates) are provided on request with the quotation.

Supplied on quotation and configured to your requirements (size, pressure class, end connection, materials, operator). Dimension tables available on request.

Supplied from a qualified manufacturer selected by ASSINOV. Origin, manufacturer details and certificates are provided with our quotation.