Honeywell VP531C1034 Pneumatic Terminal Unit Valve 5/8" OD Sweat 1.6 Cv

The Honeywell VP531C1034 is a two-way pneumatic terminal unit valve designed for proportional control of steam, hot water, or chilled water in HVAC terminal units. This normally-open, single-seated valve features a bronze body construction with 5/8 inch OD sweat (solder) connections for reliable installation in hydronic systems.

Key Features:

• 1.6 Cv flow capacity for precise fluid control
• 2-5 PSI spring range for proportional control applications
• Bronze valve body with 5/8" OD solder connections
• 150 PSI maximum body pressure rating (1034 kPa)
• 30 PSI maximum diaphragm pressure (205 kPa)
• Temperature range: 40°F to 240°F (140°F max differential for alternating hot/cold service)
• Compact size (3.5" from pipe centerline to top of actuator) for installation inside unit enclosures
• Easily replaceable actuator assembly for simplified service
• Push-on air connections for 1/4" OD plastic tubing

This valve provides reliable replacement compatibility for Johnson, Powers, Robertshaw, Barber-Colman, and older Honeywell pneumatic control devices. The normally-open configuration ensures fail-safe operation in heating applications, maintaining flow when air pressure is lost.