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. Key Benefits: 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. Common Questions: 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. 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.
