HA4A/71 - Hansen - 3 (80MM) Pressure Regulator Range A

The Hansen HA4A/71 is a 3" (80 mm) modular pressure regulator designed for ammonia (NH₃) and other industrial refrigerants. It is part of the HA4A series, known for its rugged construction, modular design, and high reliability in demanding refrigeration environments.

🔧 Technical Specifications

• Model: HA4A/71
• Port Size: 3" (80 mm)
• Connection Type: Flanged
• Pressure Range: Range A (typically for lower pressure applications)
• Safe Working Pressure: 400 PSIG (27 bar)
• Operating Temperature: –60°F to +240°F (–50°C to +115°C)
• Body Material: Ductile iron (ASTM A536)
• Piston: Steel, disc type with Teflon piston seal
• Pilot Trim: Stainless steel
• Weight: ~89 lbs

🌟 Key Features

• Modular Design:
  • Interchangeable control modules (pilots) for various functions.
  • Easy maintenance and upgrades.
• High Dirt Tolerance:
  • Teflon® dirt-wiping piston seals.
  • Operates reliably in dry or oil-free systems.
• Manual Opening Stem:
  • Located on top to avoid contamination from rust or debris.
• Sealing:
  • Teflon seating and stainless steel spring closing.
  • Non-asbestos gaskets.
• Applications:
  • Ideal for cold storage, food processing, petrochemical, pharmaceutical, and supermarket refrigeration systems.