This single-unit trip valve simplifies systems that would otherwise need multiple switching valves. It features an adjustable trip point, large diaphragm areas, and few moving parts for reliable performance and long service life. Configurations include fail-down (377D), lock-in-last-position (377L), fail-up (377U), and directional fail modes. It can be manifold-, yoke-, or bracket-mounted and is compatible with various Fi-sher piston actuators.
Fi-sher 377 Pneumatic Pressure Trip Valve Control Valve Safety Device Valve Trip Valve
Price:
US $1498.00 - 1698.00/ Set
MOQ:
1 Set
Delivery Time:
6-8 weeks
Brand:
F-isher
Product Description
The Fi-sher 377 is a pressure-sensing trip valve used in control applications where a specific actuator action is required when supply pressure falls below a set point. It automatically causes the actuator to fail up, lock in the last position, or fail down, and resets when supply pressure recovers.
Product Overview
Technical Specifications
| Specification | Details |
|---|---|
| Product | Fi-sher 377 Trip Valve |
| Function | Pressure-sensing trip valve for actuator fail action |
| Available Modes | Fail-down (377D), Lock-in-last (377L), Fail-up (377U), Clockwise/Counterclockwise fail options |
| Allowable Supply Pressure | Maximum 10.3 bar (150 psig); Minimum 3.8 bar (55 psig) |
| Trip Point | Adjustable from 2.8 bar (40 psig) to 72% of supply pressure |
| Reset | Automatically resets 12.5% to 33% above trip point |
| Body Connections | 1/4 NPT internal |
| Temperature Capabilities | Nitrile: -40 to 82°C (-40 to 180°F); Fluorocarbon options available |
| Construction Materials | Aluminum or stainless steel housing |
| Hazardous Area | ATEX Group II Category 2; SIL 3 capable |
| Approximate Weight | Aluminum: 0.95 kg; Stainless steel: 2.31 kg |
Application Industry
Used in process control systems with pneumatic piston actuators where defined fail-safe action is required upon loss of air supply, including oil and gas, chemical, power, and general industrial applications.
Common Problems
Users may face issues with improper trip point setting, volume tank sizing for fail modes, or piping complexity in multi-valve setups. The 377 design reduces piping needs and allows easy mode conversion with minor hookup changes.
Replacement Models
Serves as a direct or functional replacement for earlier Fi-sher trip valves or multi-valve trip systems requiring simplified fail-safe control.
Why Buy From Us
We supply genuine Fi-sher / Em-erson products with experience in control valve accessories and reliable support for process applications.
Stock & Delivery Time
Typical production and delivery time is 6-8 weeks.
RFQ Form
Please provide actuator type, required fail mode, supply pressure, and mounting preference for a customized quotation.
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Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.
Company
Xiangjing (Shanghai) M&E Technology Co., Ltd
Location
No.6 Building,No.98 Lane, No.1 Fulian Road, Baoshan District, Shanghai, China
Contact Person
Edward Zhao