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DFT – 8008 SS-BSS Model Check Valve In-Line Threaded Check Valve
The DFT® Basic-Check valve is a versatile all-purpose, spring-assisted, in-line check valve that provides reliable, low maintenance service for a wide range of liquids and gases at various pressure/temperature combinations. The valve consists of a guard cage, spring, valve disc, retaining ring and seat. It can be combined with pipe fittings such as reducing couplings, drain elbows, etc. to form a complete check valve unit ideally suited for a broad range of pipeline applications or incorporated into machinery for OEM applications. The metal-to-metal sealing area of the Basic-Check valve’s disc and seat is precision lapped, providing very tight shut-off of both gas and liquid. If bubble-tight shut-off is required, resilient soft seats are available.Light spring available: Cracking Pressure = 0.24 PSI (6.5 inches of water)Request a Quote
Friction Loss (Meter of Pipe)
1 Cracking pressure for vertical flow will be slightly different: upward flow, slightly higher; downward flow, slightly less.
Not recommended for use on discharge of reciprocating compressors.
2 Contingent on service ratings of matching pipe and fittings.
Buna-N -49 (-70 to 250°F)
EPDM -57 (-75 to 300°F)
TFE®-Viton -98 (-40 to 400°F)
Viton® -51 (-40 to 400°F)
Zelon® -54 (37 to 400°F)
1 Soft seats are not available for the Style BSE check Valve. Buna-N and Viton are not suitable for steam service.
Inconel® X-750 (-460 to 700°F)
316 SS (-460 to 450°F)
- 1/4″ to 2 1/2″ Line size
- 450 to 6000 CWP
- Threaded ends
- Stainless Steel Construction
- Spring-assisted silent closing
- Horizontal or vertical installation
- Tight shut-off – lapped disc & seat
- Easy Maintenance
- Inconel® 750 Spring
- Soft seat
Cut Sheet (Basic-Check® Threaded In-Line Check Valves) (PDF)
Water Hammer (PDF)
Pressure Temperature Rating (PDF)
Technical Information (PDF)
Zelon Technical Information (PDF)
Canadian Registration Numbers (PDF)
Check Valves: Key Considerations to Make When Designing Fluid or Gas Flow Systems (PDF)