Spence D5-5/25 Pilot

The Spence D5-5/25 Pilot is a heavy-duty pressure reducing pilot designed for precise steam pressure regulation in industrial applications. Engineered for use with Spence Type E or Type C main valves, this pilot utilizes a 5-25 PSI spring range to maintain a constant delivery pressure regardless of fluctuations in the inlet line. The cast iron construction ensures long-term durability in high-cycle environments, while the internal diaphragm is responsive to minute pressure changes, preventing?hunting or system instability. This direct-operated regulator is a critical component for steam system optimization, specifically within low-to-medium pressure heating systems. Proper installation requires a downstream sensing line to provide accurate feedback to the pilot. Its modular design allows for straightforward field maintenance and quick orifice replacement, ensuring minimal downtime for mechanical contractors managing complex boiler rooms or district heating loops.

• Spring Range: Calibrated for 5 to 25 PSI output, ideal for low-pressure steam headers.
• Direct Acting Design: Ensures rapid response to downstream load changes for stable pressure control.
• Universal Compatibility: Interchanges seamlessly with Spence Type E and Type C main valve bodies.
• Rugged Build: Heavy-walled casting and hardened stainless steel seats resist erosion and steam wire-drawing.
• Field Serviceability: Designed for easy access to internal components without removing the pilot from the sensing line.

Common Questions

What causes erratic pressure control when using the D5 pilot?
Inconsistent downstream pressure is often caused by a clogged sensing line or a dirty strainer. Ensure the 1/4-inch NPT control line is clear and that the pilot orifice is free of scale or debris.

Can I change the delivery pressure range by only swapping the spring?
Yes, the Spence D5 pilot is versatile; however, ensure the spring color code matches the intended PSI set point to maintain calibration accuracy and diaphragm safety.

Does this pilot require an external power source?
No, this is a self-contained pilot that operates using the energy of the steam itself, making it reliable for remote or critical installations where electrical power is unavailable.

This item is not eligible for free shipping.

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.