Siemens Building Technology GRD221.1U Actuator 322838-753 and UDAS75 model series unit

and UDAS75 model series unit heaters

The 240V heater assembly utilizes high-grade nichrome wire

it utilizes NBR seals to maintain a bubble-tight shut-off across a pressure range of 0-125 PSI

While debris can be removed

this brass body solenoid valve features a 5/32" orifice and is rated for a broad pressure range of 1 to 150 PSI

Siemens Building Technology GRD221.1U Actuator 322838-753 and UDAS75 model series unitThe Siemens Building Technology GRD221. 1U Actuator is a specialized 120V fire and smoke damper actuator designed for critical life safety HVACR applications. As a veteran grade two position spring return actuator, it delivers 30 lb in of torque, ensuring reliable open close operation for smoke control and combination fire smoke dampers. Built to exceed the rigors of UL555 and UL555S standards, this unit provides a nominal 30 second drive time and a