Honeywell VP527A1034 Two-Way Pneumatic Radiator Valve 3/8" Nominal 1/2" OD 1.6 Cv

The Honeywell VP527A1034 is a normally open, single-seated pneumatic unitary valve designed for proportional control of hot and cold water in unit air conditioners, fan coil units, and radiator systems. This compact two-way valve features a 1/2" outer diameter with 3/8" nominal connection size, offering a 1.6 Cv flow coefficient and operating pressure range of 3-10 PSI.

Key Features:

• Forged brass straight-through body with end connections threaded for 45° SAE flare fitting nuts
• High-temperature rolling diaphragm actuator with aluminum cover for reliable operation
• Spring-loaded, self-adjusting Buna-N "V"-ring packing that is replaceable without system shutdown
• Stainless steel stem, 3/16" (5mm) diameter for durability
• Integral seat and brass plug with removable composition disc provides equal percentage flow characteristics
• Integral air connection for 1/4" O.D. plastic tubing
• Compact design permits installation where space is limited

Technical Specifications:

• Body pressure rating: 250 PSI maximum
• Close-off pressure: 45 PSI
• Maximum controlled medium temperature: 250°F
• Temperature range: -40°F to 180°F (-40°C to 82°C)
• Overall length: 4-1/8 inches

This valve serves as a replacement for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell pneumatic control valves, making it an excellent choice for retrofit and upgrade applications in commercial HVAC systems.