Fisher 377 trip valves help you maintain normal process operation in applications where a specific valve or actuator action is required. When supply pressure falls below the trip point, the trip valve causes the actuator to fail up, lock in the last position, or fail down. When the supply pressure rises above the trip point, the 377 trip valve automatically resets, allowing the system to return to normal operation.
Product Description
The Fisher™ 377 Pressure-Sensing Trip Valve provides reliable fail-safe protection for valve actuators in critical applications. This pneumatic monitoring device automatically moves actuators to a safe position (up, down, or locked) upon supply pressure loss, then auto-resets when pressure recovers. Its simple, robust design ensures long service life with minimal maintenance. Ideal for safety systems in oil & gas, chemical, and power industries where operational integrity is paramount.
Key Features
Fail-Safe Actuation – Automatically positions valves to predetermined safe state upon pressure drop
Auto-Reset Function – Returns system to normal operation when supply pressure recovers
Cost-Effective Solution – Replaces complex multi-valve configurations with single-unit design
Field-Reversible Action – Easily configured for different fail modes without additional parts
Rugged Construction – Available in aluminum or stainless steel for harsh environments
Adjustable Trip Point – Customizable activation pressure to match system requirements
Technical Specifications
Product Series: Fisher™ 377
Function: Pressure-sensing trip valve
Max Supply Pressure: 150 psig (10.3 bar)
Connections: 1/4″ NPT (standard)
Body Materials: Aluminum or 316 Stainless Steel
Temperature Range: -40°F to +180°F (-40°C to +82°C)
Diaphragm Material: Buna-N (standard)
Typical Applications
Pressure protection systems in offshore oil & gas platforms
Safety shutdown systems in chemical processing plants
Turbine and boiler protection in power generation facilities
Critical process isolation in various industrial applications
Imported brand The product styles are rich anddiverse Professiona quality and service
KateTeco (Tianjin) Technology Co., Ltd. serves as an outstanding partner in the field of industrial fluid automation, specializing in the introduction and integration of high-end valves and instruments. We are committed to providing customers with safe, reliable, and intelligent system solutions. By leveraging global leading product resources and supported by systematic professional training and on-site technical assistance from Emerson’s experienced engineers, we ensure that customers can respond promptly and accurately to technical challenges.
With full lifecycle services covering installation, commissioning, operation, maintenance, and replacement, we deliver a true one-stop service system. This allows our customers to enjoy seamless, efficient, and high-quality assurance, supporting enterprises in achieving stable operation and continuous upgrades.
✅ Is it 100% genuine? —— We guarantee: All products are official and come with an 18-month warranty.
✅ Can it be delivered quickly? —— We promise: Provide fast global delivery services to ensure your project progress.
✅ Is expert support available? —— We offer: Full-process technical support, from selection guidance to installation and commissioning.
✅ Is the solution optimal? —— We ensure: Recommend the most reliable and cost-effective solution based on your specific needs.
