Description
Honeywell VP525C1008 Pneumatic Radiator Valve Overview
The Honeywell VP525C1008 is a 1/2″ NPT pneumatic radiator valve engineered for precise proportional control in steam and hot water heating systems. With a straight male union connection for easy installation and a push-on air connection designed for 1/4″ O.D. plastic tubing, this valve simplifies field wiring and pneumatic hookup. Its normally open valve action ensures that heat is delivered in the absence of control air pressure, making it a reliable choice for fail-safe heating applications.
Key Features
- 1/2″ NPT straight male union connection for straightforward piping integration
- Flow coefficient (Cv) of 0.63 for accurate flow regulation
- 3–10 PSI spring range for proportional pneumatic control
- Push-on air connections compatible with 1/4″ O.D. plastic tubing
- Proportional, normally open (N.O.) valve action
- Suitable for use with steam or hot water heating systems
Specifications
- SKU: VP525C1008
- Brand: Honeywell
- Connection Size: 1/2″ NPT
- Connection Type: Straight male union
- Cv Rating: 0.63
- Spring Range: 3–10 PSI
- Air Connection: Push-on for 1/4″ O.D. plastic tubing
- Valve Action: Proportional, normally open
- Media: Steam or hot water
Application
The VP525C1008 is ideal for commercial and industrial hydronic and steam radiator systems where pneumatic control is required. The normally open design provides fail-safe heating — the valve opens fully when air pressure is lost, ensuring occupant comfort and system protection. The proportional control action allows for smooth, incremental modulation of flow, improving system efficiency and comfort compared to on/off control strategies.







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