Microfinish Valves Pvt. Ltd manufactures Quarter Turn Rotary Actuator. Microfinish Valves Pvt. Ltd is an ISO 9001: 2000 accredited company. The Quarter Turn Rotary Actuator is a Pneumatic actuator most commonly used valve automation systems and utilizes compressed air readily available in most plants. The Rotary Actuator comes in single and double acting versions suitable for quick opening and closing in both on-off and control applications and is coupled with ball, butterfly and plug valves,