HCK5D/8 - Hansen - 4 (100MM)Self-equalizing Suction Stop w/1/2 Socket Weld Disc STR

The Hansen HCK5D/8 is a 4" (100mm) self-equalizing, gas-powered suction stop valve with a 1/2" socket weld Disc STR, designed for large-scale industrial and commercial refrigeration systems. Here's a detailed overview of its specifications and features:

Key Specifications

• Model: HCK5D/8
• Port Size: 4" (100mm)
• Disc Type: 1/2" Socket Weld, Disc STR
• Body Material: Ductile iron (ASTM A536)
• Seal Cap: Steel, zinc chromate plated
• Stem: Plated steel
• Top Cover: Steel (ASTM A36)
• Spring: Stainless steel
• Safe Working Pressure:
  • Standard: 400 psig (27 bar)
  • CO₂ Applications: 600 psig (40 bar)
• Operating Temperature: -60°F to +240°F (-50°C to +115°C)
• Weight: ~155 lbs 
  1

Features

• Self-Equalizing Piston Design: Eliminates the need for a separate bleed-down solenoid valve.
• 2-Step Operation: Remains normally open via a spring; closes with gas pressure during defrost.
• Controlled Bleed-Down: Valve remains closed until pressure across it is equalized, enhancing safety and system protection.
• Manual Opening Stem: For servicing and troubleshooting.
• Adjustable Bleed Rate: Via screw-in orifice discs.
• Flexible Installation: Can be installed horizontally or vertically (side installation preferred for liquid/oil conveyance).
• Refrigerant Compatibility: Suitable for ammonia, halocarbons, CO₂, and other approved refrigerants