MK-4621 Pneumatic Valve Actuator 8 to 13 PSIG
These valve actuators, with an 11 sq. in. effective diaphragm area, are used with TAC VB-7xxx series valves for proportional pneumatic control of hot water or chilled water valves.
The MK-46xx and MK4-46xx Series may also be mounted on discontinued 1/2" through 1-1/4" TAC VB-111, VB-131, VB-314, and VB-9xxx series valves.
Rugged die cast aluminum housing
Replaceable beaded molded neoprene diaphragm
Built-in spring to retract output shaft on loss of air pressure
Adjustable start point
Multiple spring ranges for various applications
1/2" nominal stroke