RTC — Scotch yoke pneumatic actuators

RTC single/double acting pneumatic low-pressure actuators, are suitable for the operation of quarter turn valves (ball valves, butterfly valves and plug valves) for ON-OFF and modulating heavy-duty service. The actuator is made up of a waterproof scotch yoke mechanism transforming the linear movement of the pneumatic cylinder (on closing or opening) into the rotary movement, which is necessary for valve operation. The travel stroke of the yoke is adjustable between -4 deg/+4 deg at both ends by mean of the external mechanical stops arranged into the side-wall of the mechanism body and into the end flange of the pneumatic cylinder. Scotch yoke mechanism centerbody cover is machined to provide the assembly pattern for any required accessories (for example positioner, signaling limit swiches, etc.) by mean of proper matching units. The above mentioned accessories are operated by the actuator drive sleeve. Actuator centerbody bottom wall is machined with threaded holes to allow actuator mounting on top of valve top-work either directly or, when required, with the interposition of an adaptor flange or a mounting bracket.  
 
  • Actuators certified in accordance with PED and/or ATEX
 
  • Double acting or spring return compact design
 
  • Environmental protection: IP66/IP67M according to IEC/EN 60529
 
  • Housing is manufactured in carbon steel material without any cast/grey/ductile iron or aluminum parts
 
  • Operating pressure: up to 12 Barg
 
  • Operating temperature: -30°C to +100°C (lower or higher temperature available on request)
 
  • Output torque: from 40 Nm up to 6.000 Nm for double acting version
 
  • Scotch yoke mechanism available in both canted or symmetric executions
 
  • Spring ending torque: from 40 Nm up to 2.500 Nm for single acting version
 
  • Standard supply medium: air, nitrogen or sweet gas (special version for sour gas on request)
 
  • Up to SIL3 requirements as a “single device”