Description
The ASCO K3A552V is a 3/4 inch normally closed (N/C) solenoid gas shut‑off valve designed for positive control of fuel gas in commercial and industrial combustion systems such as burners, furnaces, boilers, and HVAC equipment. It operates at 110–120 V AC, has a direct‑acting design, and provides reliable shut‑off for natural gas and LP gas applications with a maximum pressure differential of about 3 psi. The valve features a rugged aluminum body and threaded NPT connections with built‑in upstream and downstream test ports for maintenance and inspection. Its flow capacity (Cv) is approximately 9, suitable for around 520,000 BTU/hr service.
Key Features
- 2‑way normally closed operation — the valve stays closed when not energized and opens when powered, providing positive gas shut‑off control.
- Die‑cast aluminum body for durability in industrial environments.
- Designed for positive shut‑off on pilot or main gas lines of commercial and industrial gas burners.
- Supplied with 1/8" NPT upstream and downstream pipe taps (with plugs) to support routine testing and field maintenance.
- Rated for ambient temperatures up to approximately 175 °F, making it suitable for typical combustion and HVAC equipment environments.
- Flow capacity (Cv) around 9 (high flow for its size) and capable of handling around 520,000 BTU/hr in gas applications.
- Maximum operating differential pressure up to about 3 psi, appropriate for low‑pressure fuel control.
- Rapid open and close response (typically under 1 second).
