Spence 05-05007-00 Spring the internal spring is rated

the internal spring is rated for 4" to 8" water column

designed to withstand the high-heat cycles of modern furnaces and boilers

On terminals 1 and 3

While it fits the physical T-4000 Series frame

Spence 05-05007-00 Spring the internal spring is ratedThe Spence 05 05007 00 Silver Spring is a critical calibration component designed specifically for the Spence D Pilot pressure reducing valve. Engineered for precision in steam and liquid systems, this D series pilot spring provides a reliable tension range of 1 10 PSI or 3 20 PSI depending on the specific pilot configuration and application requirements. As a genuine Spence replacement part, it ensures the pilot assembly maintains accurate set point