Farris Engineering 27DA23-140S4 Safety Pressure Relief Valve 3/4" x 1" 45 PSIG

The Farris Engineering 27DA23-140S4 is a high-performance safety pressure relief valve designed for overpressure protection in industrial piping systems, vessels, and equipment. Manufactured by Farris Engineering (a division of Teledyne Fluid Systems, now under Curtiss-Wright), this model features a balanced bellows design for reliable operation in backpressure applications. It is commonly used in chemical processing, oil and gas, pharmaceutical, and power generation industries to prevent equipment failure by automatically relieving excess pressure. Key benefits include precise set pressure accuracy, corrosion-resistant materials for longevity, and compliance with ASME Section VIII standards for safety. Compared to similar valves like those from Crosby or Consolidated, the Farris 27DA offers superior bellows sealing and easier maintenance, reducing downtime. Drawbacks may include higher initial cost and the need for periodic testing to ensure functionality. This specific unit has a 3/4" inlet and 1" outlet, set at 45 PSIG, making it ideal for low to medium pressure systems. From the provided images, the valve appears used with visible wear and minor surface corrosion, but structural integrity seems intact. No parent/child assets are evident, though it may integrate with pressure sensors or controllers in a full system.