Description
The ASCO S261SH02N3JK4 is a commercial‑grade pilot‑operated gas shut‑off valve designed for industrial and commercial combustion systems. It uses a zero‑differential piloted diaphragm mechanism and is normally closed, meaning it blocks gas flow unless energized. It operates on 120 V AC and controls fuel gas for burners, furnaces, boilers, and similar heavy‑duty equipment. The valve body is die‑cast aluminum with threaded NPT connections for easy pipe installation. It includes 1/8 inch upstream and downstream test ports for routine pressure and leak testing. Typical ambient temperature range is approximately ‑20 °F to 170 °F, and it is suitable for differential pressures up to about 25 psi. Flow capacity is approximately 83 Cv, supporting high‑capacity gas flow up to several million BTU/hr.
Key Features
- 2‑way, normally closed design for positive shut‑off when not energized.
- Pilot‑operated diaphragm control for stable, reliable gas actuation.
- Die‑cast aluminum body with threaded NPT inlet and outlet.
- Upstream and downstream 1/8 inch NPT test ports for pressure testing.
- Flow coefficient of about 83 Cv for high gas throughput.
- Rated for differential pressures up to about 25 psi and ambient temperatures up to ~170 °F.
- Fast opening/closing (under ~1 second).
- Commonly used in commercial burners, large HVAC combustion systems, and industrial heaters.
