Specifically designed as a volute casing O-ring for the Armstrong Series 4270 close-coupled motor-mounted end suction pumps

For contractors performing a boiler repair service

It is designed for systems that pull a dedicated 1

Its normally open contacts close upon detecting the specified negative pressure

a modulating series would be required

MAMAC Systems PR-274-R4-MA Pressure Sensor 318973-401 Specifically designed as a voluteThe MAMAC Systems PR 274 R4 MA is a high precision low pressure sensor designed for critical monitoring of clean dry air or inert gases in commercial and industrial HVACR environments. Built with a micro machined, glass on silicon capacitance sensor, this differential pressure transducer provides field technicians with exceptional stability and a 10 PSID overpressure rating to prevent zero shift during system surges. The unit features six field