Description
The Hansen HSCK300C is a 3" (80 mm) 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 full flow in the arrow direction and reseating promptly when flow reverses.
Typical applications include refrigeration liquid, suction and hot gas lines, liquid pump discharge and compressor discharge.
Key specifications
- Catalog number: HSCK300C
- Size: 3" (80 mm), butt weld; connections match Schedule 40 steel pipe
- Flow coefficient (angle): Cv 205
- Body: cast steel, ASTM A352 Grade LCB; bonnet: ductile iron, ASTM A536
- Disc assembly: ductile iron with Teflon seat; polished stainless steel stem
- Stem packing: graphite composite plus neoprene O-ring in series
- Seal cap: zinc plated steel; identified as a stop/check by a green seal cap and bonnet groove
- 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
- Service kits listed by Hansen for this size: gasket kit 50-1137, bonnet assembly 50-1143, seat disk assembly 50-1149, seal cap kit 50-1038
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. It suits liquid pump discharge, compressor discharge and hot gas defrost liquid lines.
How should it be installed?
Install with flow in the direction of the body arrow, preferably with the stem vertical. Hansen recommends removing the bonnet, spring and disc assemblies before welding.
Specifications are based on Hansen Technologies Bulletin C519e (Combination Stop/Check Valves, Jan 2013). Confirm fit, ratings and application requirements before ordering.
Disclaimer: The image shown is a general representation of the product category and may not depict the exact part number offered. Actual product appearance, specifications, and configuration may vary.
