Spence Engineering D5 Pilot

The Spence Engineering D5 Pilot is a heavy-duty, self-contained, spring-operated pressure reducing pilot designed to provide precise control for steam and air systems. This cast iron pilot is the direct replacement for P-D5-C1A1GS and is engineered for use with Spence E-Series main valves. With a 1-10 psi spring range, it offers an accuracy of ±1/2 psi, making it an essential component for low-pressure steam regulation where stability is paramount. The normally closed design and packless construction reduce maintenance intervals by eliminating traditional packing leaks and potential stem binding. This pilot includes a built-in strainer screen to protect the stainless steel trim from pipeline scale and debris, ensuring consistent performance in demanding commercial and industrial boiler rooms.

• Precision Regulation: Maintains a sensitive ±1/2 psi control accuracy for low-pressure applications between 1 and 10 psig.
• Rugged Construction: Built with a cast iron body and durable stainless steel internal components for maximum service life.
• Universal Compatibility: Fully interchangeable across all sizes of Spence E and C series main valves.
• Simplified Maintenance: Packless construction eliminates the need for frequent packing adjustments and prevents stem leakage.
• Direct Replacement: Specifically replaces manufacturer part number P-D5-C1A1GS, ensuring a seamless drop-in fit for existing installations.

• What main valves are compatible with the D5 Pilot? The D5 is primarily used with Spence Type E main valves to form a complete pressure reducing regulator, though it can also be used with Type C valves for specific steam and air services.
• How do I adjust the delivery pressure? Pressure adjustments are made by turning the adjustment nut on top of the pilot spring chamber. Clockwise rotation increases the set pressure, while counter-clockwise decreases it within the 1-10 psi range.
• Can this pilot be used for high-pressure applications? No, the D5 with the silver spring is specifically rated for a 1-10 psi delivery range. For higher pressure requirements, a different spring or a standard Type D pilot should be utilized.

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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.