Spence E2-1 1/2 Valve

The Spence E2-1 1/2 Valve is a pilot-operated main valve engineered for precision in steam and gas media regulation. Featuring a cast iron body and packless construction, this normally closed valve eliminates the friction associated with traditional stuffing boxes, ensuring long-term reliability in high-cycle environments. This 1-1/2 inch E2 main valve is specifically designed for low-pressure steam systems, rated for a maximum operating pressure of 15 PSIG at 250°F.

Experienced contractors utilize the Spence E2-1 1/2 to manage varying initial pressures and maintain a constant delivery setpoint. By pairing this single-seat steam valve with appropriate pressure or temperature pilots, you can achieve accurate pressure reduction or process control. The internal protected main spring and Nitrile (NBR) diaphragms provide consistent performance across the full flow coefficient range. For optimal results, ensure the valve is installed in a horizontal pipe run with the diaphragm chamber facing down to facilitate proper drainage and prevent water hammer.

• Frictionless Operation: The packless design prevents stem binding and reduces maintenance requirements in steam distribution systems.
• Precise Control: Maintains tight shutoff (ANSI/FCI 70-2 Class IV) to prevent steam leakage and pressure creep during dead-end service.
• Versatile Compatibility: Integrates seamlessly with various Spence pilots for pressure (Type D), temperature (Type T), or solenoid-actuated applications.
• Durable Construction: The cast iron (CI) build and protected spring assembly resist the harsh conditions typical of district heating and boiler room piping.

What is the difference between the Spence E and E2 main valves?
The E2 series is specifically enhanced for low-pressure steam and gas applications, often featuring a larger diaphragm and a lighter spring to improve sensitivity at lower PSIG ratings compared to the standard E series.

Why is my Spence E2 valve failing to open?
Common causes include a clogged 5A restriction elbow or a ruptured main diaphragm. Ensure the 1/4" control pipe is free of debris and the pilot is receiving the signal required to load the diaphragm chamber.

Can I install this valve in a vertical line?
For reliable operation and drainage, it is recommended to mount the Spence E2-1 1/2 in a horizontal line with the diaphragm underneath. Vertical installation can lead to erratic regulation and condensate buildup.

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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.