Spence 04-01623-00 Diaphragm

The Spence 04-01623-00 Diaphragm is a critical 3-1/2 inch pressure-sensing component engineered specifically for Spence Type D pilots. This 301 Stainless Steel diaphragm provides the necessary flexibility and tensile strength required to actuate the pilot mechanism in steam pressure reducing stations. For veteran technicians managing steam regulator maintenance, utilizing genuine Spence replacement parts is essential to maintain the calibration accuracy of the D-Pilot, which serves as the "brain" for larger main valves in pilot-operated systems. This specific diaphragm is also cross-compatible with Spence Type N and Type W pilots, offering versatile inventory utility for commercial boiler rooms. Precise seating of the 04-01623-00 ensures leak-free operation and consistent pressure regulation under high-temperature steam conditions. When rebuilding a pilot, verifying the diaphragm's integrity is the first step in troubleshooting fluctuating downstream pressure or pilot hunting. Ensure you follow standard torque patterns during the pilot bonnet reassembly to prevent premature fatigue of the stainless steel material.

• Engineered Precision: Specifically calibrated for the spring-loaded mechanism of Spence D-Pilot pressure regulators.
• High-Temperature Durability: Constructed from 301 Stainless Steel to withstand the rigorous cycling and thermal stress of steam service.
• Multi-Pilot Compatibility: Standardized fit for D, N, and W series pilots, reducing the number of SKUs required for field service.
• Reliable Pressure Response: Maintains rapid and accurate response to downstream pressure changes, preventing system instability.

• How many diaphragms are required for a standard rebuild? Cast iron D-Pilots typically require two (2) diaphragms, while cast steel versions may require three (3) to handle higher operating pressures.
• Does this fit the D2 pilot as well? This unit is designed for the standard D-Pilot. Always verify your specific pilot model and material (Iron vs. Steel) before installation.
• What is the physical diameter of this part? The 04-01623-00 measures 3-1/2 inches in diameter, ensuring a precise fit within the pilot chamber.

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.