Connect the high-pressure side to the black port and the low-pressure/vacuum side to the gray port

The International Environmental 70665406 Relay is an OEM replacement part engineered for high-reliability switching in fan coil units and industrial HVACR systems

a specialized 30mm heavy-duty pilot device may be required

Does this part include the gasket

Siemens Building Technology 599-03168 Valve 318518-761 Connect the high-pressure side toThe Siemens 599 03168 is a professional grade Flowrite 599 Series globe valve designed for high performance throttling in commercial hydronic and steam systems. This 1 1 4 inch NPT 2 way valve features a normally open (NO) configuration and is engineered with a 16 Cv equal percentage flow characteristic, ensuring precise modulation and consistent heat transfer across the coil. Constructed with a heavy duty bronze body and brass trim, it is rated for