Description
The Hansen GW402C is a 4" (100 mm) butt weld globe shut-off valve with a seal cap, built for industrial refrigeration piping. It welds directly to Schedule 40 steel pipe, avoiding the leak points of flanged or threaded joints, and uses Hansen's non-leak seal plus stem packing design to minimize stem leakage.
The straight-through globe flow path and low pressure drop design suit main and branch lines. Typical uses include ammonia system suction, liquid, discharge, recirculated liquid, hot gas, thermosyphon and oil lines, and steel pipe portions of halocarbon and industrial systems, where seal cap models are specified.
Key specifications
- Catalog number: GW402C (globe, seal cap)
- Size: 4" (100 mm), butt weld; connections match Schedule 40 pipe
- Flow coefficient (globe): Cv 290
- Body: cast steel, ASTM A-352 Grade LCB
- Bonnet: ductile iron, ASTM A-536
- Stem: polished stainless steel; seat disc: retained PTFE (Teflon); stainless steel ball bearings
- Stem packing: graphite composite plus neoprene O-ring in series
- Seal cap: zinc plated steel
- Safe working pressure: 400 psig (28 bar g) standard; 600 psig (41 bar g) available on request
- Operating temperature: -60°F to 240°F (-51°C to 115°C) standard
- Refrigerants: R717 (ammonia), R22, R134a, R507a, R404a, R744 (CO2) and other Hansen-approved refrigerants
Common questions
What is the difference between the GW402C and the GW402H?
Both are 4" butt weld globe valves. The C suffix means this valve ships with a seal cap, while the GW402H ships with a handwheel. Hansen notes that the handwheel and seal cap are interchangeable.
Can this valve be used with CO2 or halocarbon refrigerants?
Hansen lists the butt weld shut-off valve line as suitable for R717 (ammonia), R22, R134a, R507a, R404a, R744 (CO2) and other Hansen-approved refrigerants.
Specifications are based on Hansen Technologies Bulletin G359d (Butt Weld Shut-Off Valves, Nov 2019). 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.
