Direct Cross-Reference: Replaces Allanson 2721-668SF without kit modifications

5 uF at 370V capacitor for proper starting torque and run efficiency

verifying TRR1998 transformer specs against the system nameplate is vital to prevent undervoltage issues during terminal load engagement

The P70DA-400 specifically features a manual reset lockout

Spirax-Sarco 55225 Main Valve Refrigerant Direct Cross-Reference: Replaces Allanson 2721-668SFThe Spirax Sarco 55225 is a high performance 1. 25 inch NPT 25 Series main valve designed for precise pressure and temperature control in industrial steam systems. This pilot operated diaphragm valve is engineered for durability, utilizing a stainless steel diaphragm to provide high lift and maximum flow capacity. As a fundamental component of the Spirax Sarco 25P pressure reducing valve assembly, the 55225 model ensures stable downstream pressure