Johnson Controls T-4002-203 Pneumatic Thermostat Els PW 17895 featuring precise timing intervals: the
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Description
Johnson Controls T 4002 203 Pneumatic Thermostat Els PW 17895 featuring precise timing intervals: the featuring precise timing intervals: the primary M1 M2 poles typically open within 20 40 seconds nickel plated forged brass thermostatic radiator valve body designed for precision flow control in hydronic and low pressure steam heating systems