Rotork Schischek manufactures electric actuators for quarter-turn and linear valve and damper operation with a spring-return failsafe capability and with ‘Ex’ or ‘Red’ explosionproof or ‘In’ non-explosionproof enclosure specifications.
The Max range is designed for quarter-turn operation at output torques between 5 and 150 Nm with a selectable stroke time of 3, 15, 30, 60 or 120 seconds. The selectable stroke time is one of a number of options that are built into the standard product, including the adaptable power supply and choice of on/off, three-position or modulating control. For position signalling and feedback a 4-20mA or 0-10V supply can be utilised, whilst two end of travel auxiliary position switches are optionally available. An integral heater automatically maintains reliable actuator operation at temperatures down to -40ºC, facilitating the installation of standard products in extreme environments. In its failsafe version the actuator is available with SIL2 safety integrity level approval.
The supply vessel order follows a similar marine industry order from Pecol involving ExMax explosionproof actuators, supplied for damper control on an Italian naval aircraft carrier.