Parker’s safety exhaust valves remove all trapped air from machinery

Wainbee carries Parker's P33 series of exhaust valves.

For industrial equipment that boosts machine safety, the place to look is Wainbee Limited. The company offers many products for this purpose, including Parker’s P33 series of global redundant safety exhaust valves. These units are designed to remove trapped air safely from machinery, resulting in a safe state. The P33 series is compatible with two-channel safety architecture up to Category 4, Performance Level e.

Internally or externally monitored

These Parker valves are 3/2 normally closed valves that quickly exhaust compressed air during a fault condition and offer monitored coverage to ensure safe operation. Two styles of safety exhaust valves are available – internally or externally monitored. External monitoring happens through a two-channel system connected to a safety interface device. Both models are available with an optional, adjustable soft start and high flow exhaust to shut down equipment more rapidly when required. For quick visual reference, LEDs offer clear status of main solenoid operation, sensor power, and fault condition.

Other features of these safety exhaust valves from Wainbee:

• Solid-state pressure sensors for accurate fault-condition monitoring;
• M12 connectors for solenoids and sensors for easy installation;
• Easy electrical interface with M12 connectors to safety circuit;
• Superior seated seal design for extended lifespan;
• No-maintenance, non-clog safety exhaust outlet by design;
• Suitability for standalone use or modular mounting to P32 or P33 FRL assembly; and
• High B10 life value.

For externally monitored valves, a PLC or relay conducts the monitoring, which provides a size and cost advantage over internal monitoring. A safety interface integrated into the PLC or relay determines the achievable category and performance level of the control system. Users provide the logic function through the safety device. The valve locks out to the safe state if its solid-state sensors detect asynchronous movement of the elements. If the solid-state sensors are in different states for more than 150 milliseconds, the programming logic must shut the power off to the solenoids.

Parker does not recommend using these valves with clutch or brake applications; they are intended in conjunction with a safety relay or PLC.

As always, a single product does not provide a complete safe system, but is designed to work in conjunction with the entire machine network to achieve a safe goal.

For more information, contact Wainbee.

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