Description
The Hansen HSCK400C is a 4" (100 mm) port butt weld combination stop/check valve with a seal cap. It combines a manual shut-off valve and a normally spring-closed check valve in one angle body, opening for flow in the arrow direction and reseating promptly when flow reverses.
Key specifications
- Catalog number: HSCK400C
- Size: 4" (100 mm), butt weld; connections match Schedule 40 pipe
- Flow coefficient (angle): Cv 320
- Body: cast steel, ASTM A352 Grade LCB; bonnet: ductile iron, ASTM A536
- Disc: ductile iron with Teflon seat; stainless steel spring
- Seal cap: zinc plated steel; a green seal cap and bonnet groove identify the valve as a stop/check
- Opening pressure drop: about 1 psi (0.07 bar)
- Safe working pressure: 400 psig (28 bar g) standard; 600 psig (41 bar g) on request
- Operating temperature: -60°F to 240°F (-51°C to 115°C)
- Refrigerants: R717 (ammonia), R22, R134a, R507a, R404a, R744 (CO2) and other Hansen-approved refrigerants
Common questions
Why use a stop/check valve instead of separate valves?
Hansen notes the combination valve reduces pressure drop, space and the number of welded joints, and avoids trapping liquid between a separate check valve and stop valve.
Which service kits fit this valve?
Hansen lists gasket kit 50-1138, bonnet assembly kit 50-1144, seat disk assembly kit 50-1150 and seal cap kit 50-1038 for the 4" HSCK. Hansen notes that parts for the older "SCK" stop/check valves (before 2003) are not interchangeable.
Specifications are based on Hansen Technologies Bulletin C519e (Combination Stop/Check Valves, Jan 2013). Confirm fit, ratings and application requirements before ordering.
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