These valve actuators, with an 11 sq. in. (71 cm2)
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.
Application- 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