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AD644 (Differential Pressure Actuator)
This actuator is used in ICR bodies and its function is to keep a differential pressure between 2 fluids: the outlet of the body of the ICR valve and the one form the reference pipeline. Both pressures are pumped in the upper and lower chambers of the actuator, and the spring is used to establish the value of the differential.
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AN57D and AN57I for VE
The EPTA® AN57d and AN57i actuators pneumatically command the VE type control valves. It performs a modulating control or prints an on-off function on the valve, if the received signal is of that nature. For normal signals of 3-15 psi and 6-30 psi the AN57 actuator is reversible between NA and NC (AN57d and AN57i).
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AN657 and AN667 for ICR
The actuators AN657 y AN667 are in charge of the pneumatic control of the control valves. It carries out a modulating control or establishes an on-off to the valve, it the input signal is of that type.
