Conbraco 18C-521-5-150 Valve Freon defined by the physical spacing

defined by the physical spacing of the captive trippers on the 7-day dial

preventing wax precipitation that often leads to expansion valve plugging

it provides real-time diagnostics of the liquid line’s condition

a "no click" condition during the call for heat

the faceplate features a high-visibility F/C thermometer for at-a-glance temperature verification

Conbraco 18C-521-5-150 Valve Freon defined by the physical spacingThe Conbraco 18C 521 5 150 is a high capacity ASME Section IV certified primary safety device engineered for commercial hot water storage tanks and large scale heating systems. Designed to prevent catastrophic vessel failure, this 1" MNPT x 1" FNPT temperature and pressure relief valve provides a 2,155,000 BTU hr capacity, making it a standard for mechanical contractors servicing high output boilers. The valve is factory set to open at 150 PSI or