Allow automatic temperature control in two-pipe steam or hot water systems for free standing radiators, convectors, and other heating units with standard capacity requirements | Provide comfort and energy savings at affordable prices | Continually monitor and adjust room temperature for consistent comfort and relief from under-heating and overheating. | Valve seat disc, which is made of resilient material (EPDM), ensures tight shutoff on steam or hot water systems. | Nickel-plated brass casted body with working parts in cartridge insert for ease of service. | Controls include sensor, setpoint dial and valve actuator; components may be integral or connected by capillary tubes. | Require no electrical connections. | All working parts are replaceable using service tool (MT100C1016) while valve remains in service, in-line, under pressure. | Valves normally open without control mounted. | Valves may also be used with MV100 Electric Zone Valve Actuator.