|The ME4430, normally open series, & the ME4530, normally closed series are 2-position,
2-wire, fail-safe on power disruption units. They are designed for on-off control of
hot or chilled water, glycol (50%) and low-pressure steam.These 2-way and 3-way
control valves all use common high strength, glass filled, nylon composite, electric
gear motor actuators. An insulating collar keeps the valve body heat away from
the actuator.The actuator is equipped with a dial type position indicator and an
M30 quick disconnect mounting thumbnut.