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PNEU-TRIP® is a state-of-the-art safety system designed for the protection of steam turbines. Each system includes a pneumatic trip block with SIL3-certified solenoid valves and SIL capable pneumatic actuator. When coupled with a Woodward ProTech SX, GII or TPS electronic overspeed detection system, PNEU-TRIP provides one of the most advanced, safe, high speed and reliable turbine protection solutions available.
The system features the patented technology that employs a unique pneumatically engaged travel stop for partial stroke testing. While a typical pneumatic trip system falls short in exercising the emergency trip solenoid valves and actuator springs while introducing risks of tripping the turbine during partial stroke tests. If a turbine trip condition is detected during the test, the travel stop is immediately disengaged allowing for quick and safe shutdown of the turbine. PNEU-TRIP components are designed to be fail-safe upon loss of electric or pneumatic power and are online replaceable in TMR configurations.
Each trip actuation system can be furnished either standalone or as a complete safety solution, integrated with a Woodward electronic overspeed detection device such as ProTech SX or ProTech TPS. PNEU-TRIP also seamlessly integrates with the existing overspeed detection system, such as the ProTech-GII.
ProTech device is supplied in an industrial enclosure designed and fabricated to NEMA/UL standards by Drake Controls. The enclosure meets requirements of both area classification and ambient conditions of each specific installation.
Drake Controls also provides optional speed probes with mounting bracket and speed tooth gear.
A factory-assembled and tested PNEU-TRIP linear trip valve actuation system is mounted directly on the steam chest and coupled to the OEM trip valve.
PNEU-TRIP quarter-turn rotary actuation system is supplied fully assembled with a zero-leakage quarter turn valve. PNEU-TRIP rotary trip valve system is mounted on turbine inlet flange.
* Will depend on actuator size/model and length of tubing for remote-mount trip block models
** Rotary actuators are SIL3 capable. Linear actuator SIL certification pending