Improved Seating: Eliminates steam loss and gas bypass by ensuring the valve head aligns perfectly with the seat

High-Durability Construction: Materials selected for resistance to corrosion and structural fatigue in outdoor refrigeration systems

The robust design includes a stainless steel bellows assembly and a 16 bar maximum working pressure rating

extending the functional life of the contacts

638-inch ID

Siemens Industrial Controls 3RH2921-1DA11 Switch R-410A Improved Seating: Eliminates steam lossThe Siemens 3RH2921 1DA11 is a high performance lateral auxiliary switch block specifically engineered for the expansion of control circuit contacts. Designed for veterans in the field, this Sirius auxiliary contact features a robust 1NO + 1NC (1 Normally Open and 1 Normally Closed) configuration, providing essential feedback for motor control logic. Its side mount architecture allows for a space efficient 10mm profile, attaching seamlessly via snap