Spence E-3-250 Valve

The Spence E-3-250 is a heavy-duty, 3-inch pilot-operated main valve designed for high-capacity steam pressure regulation in industrial and commercial HVACR systems. Built with a rugged cast iron body and featuring 250# flange connections, this normally closed valve is engineered to handle a maximum inlet pressure of 250 PSIG at temperatures up to 450°F. Its packless construction and balanced metal diaphragms eliminate the friction associated with traditional stuffing boxes, ensuring a sensitive response to 10 PSI minimum pressure differentials. This Spence E-Main valve is the industry standard for pressure reducing valve stations, providing a tight ANSI/FCI 70-2 Class IV shutoff. Whether you are configuring an ED pressure regulator or a temperature control pilot system, the Spence E-3-250 offers the flow capacity and mechanical integrity required for demanding large-scale steam distribution pipes.

• Frictionless Operation: The packless design with balanced metal diaphragms ensures longevity and rapid response without the maintenance requirements of stem packing.
• High Flow Capacity: Large 3" porting allows for maximum Cv, making it ideal for primary steam mains and high-load heat exchangers.
• Durable Construction: The 250# flanged cast iron body provides superior structural rigidity for high-pressure steam application environments.
• Versatile Pilot Pairing: Compatible with a wide range of Spence pilots for pressure, temperature, or solenoid-actuated control.
• In-Line Serviceability: Designed for easy access to internal components without removing the valve body from the piping.

What is the minimum pressure differential required for the E-3-250?
This valve requires a minimum differential of 10 PSI (0.7 bar) across the seat to ensure stable operation and full stroke.

Can this valve be used for dead-end service?
Yes, the Spence Type E is a single-seat design that provides tight shutoff, making it suitable for dead-end steam service where downstream pressure must be maintained at zero flow.

Is the pilot included with this main valve?
No, this is the main valve body only. Pilots, such as the D-style pressure pilot or T-series temperature pilot, must be specified and purchased separately based on your application needs.

This item must ship via truck. Please contact us for freight quote.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.