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The EVSI 20 is a servo-operated valve
you know the housing and shaft dimensions are make-or-break
System Compatibility: The 4-20mA current loop signal is compatible with most industrial controllers and BAS platforms
though specifics depend on the media and coil configuration
Conbraco Industries 18C-542-4-150 Valve 30067439-890 The EVSI 20 is aThe Apollo 18C 542 4 150 is a high capacity bronze automatic temperature and pressure relief valve engineered for the protection of large scale commercial hot water heaters and storage tanks. This ASME Section IV certified valve features a substantial 6,050,000 BTU capacity, making it a critical safety component for high output hydronic systems. The unit is factory set at a 150 PSI relief pressure and a maximum temperature threshold of 210?? F. Built