Fisher Controls Pressure Sensing Trip Valve Type 377

Fisher™ 377 Pressure-Sensing Trip Valve

The Fisher™ 377 Pressure-Sensing Trip Valve is engineered to ensure precise control in applications requiring specific actuator responses to variations in supply pressure. This valve is integral to maintaining operational integrity by triggering predefined actions when supply pressure deviates from set thresholds.

Key Features

• Cost Efficiency: The single-valve design streamlines system architecture, reducing both costs and the need for multiple spare parts typically associated with systems utilizing multiple switching valves.
• Versatile Fail Modes: Easily configurable to various fail modes—fail up, fail down, or lock in the last position—with minimal adjustments, enhancing adaptability to diverse operational requirements.
• Adjustable Trip Point: Allows for precise calibration of the trip point to meet specific supply pressure criteria, ensuring tailored performance.
• Reliable Performance: Designed with large diaphragm areas and minimal moving components, the 377 Trip Valve offers efficient operation, reduced maintenance needs, and extended service life.

Technical Specifications

• Certifications: ATEX, CUTR
• Input Signal: Pneumatic
• Maximum Outlet Pressure: 150 psig
• Mounting Options: Actuator mount
• Operating Temperature Range: Standard and high-temperature variants available
• Position Control: On/Off
• Safety Certification: SIL 3 capable
• Supply Media Compatibility: Air, Natural Gas

Available Configurations

• 377D Trip Valve: Fails actuator piston down; includes check valve and volume tank.
• 377L Trip Valve: Locks actuator piston in the last position.
• 377U Trip Valve: Fails actuator piston up; includes check valve and volume tank.
• 377CW Trip Valve: Fails fully clockwise to close the valve; requires check valve and volume tank.
• 377CCW Trip Valve: Fails fully counterclockwise to close the valve; requires check valve and volume tank.

Each configuration is designed to meet specific operational needs, ensuring that the Fisher™ 377 Trip Valve can be tailored to a wide range of industrial applications.