Butterfly valves - Actuators

Valves of Series 922 and Series 933 are equipped with pneumatic control actuators, which consist of toothed gear, rack and two pistons.

The actuators are powerful, compact and durable units for use on quarter turn operations.

These are available in double-action and spring-reset modes. Various modes are available to meet the requirements for a large range of torques. All the pneumatic control actuators have mounted flanges in accordance with ISO 5211.



Pneumatic control actuators for valves of Series 900 and Series 911 are suitable for quarter turned valves of large apertures.

By means of a fork the linear motion of piston can be trans-formed into rotation: thus the actuators are suitable for Butterfly valves with large apertures for the purposes of regulating as well as on-off operations.

These actuators provide accurate, safe and reliable valve operation at low supply pressures. Heavy-duty lever arrangement offers great stability under large torque and shock conditions.

Operation with low friction allows more accu-rate control, easy maintenance and long service life for the system.

Series 'H' Hand lever arrangement provides latching system in open, closed and eight in-termediate positions.

A pointer indicates the position of disc and an additional lock facility is provided to prevent unauthorized valve operation.

Lever actuators are provided on siz-es from 2" (50mm) to 6" (150mm) only. For size 8" (200mm) and above Gear Operators are recommended

Series 'MOR' Gear operators offer simple and reliable manual positioning of the valves.

These actuators consist of worm gear arrangement housed in a robust cast iron hous-ing.

Sturdy design provides long life and maintenance-free services.

The high gear ra-tios enable minimum input efforts for high torque conditions.