FISHER™ 377
Technical Parameters
Parameter Specification
Model Fisher 377
Type Pilot-Operated Safety Relief Valve (POSRV)
Operation Full Nozzle or Full Bore design
Set Pressure Range Wide range available, typically from 5 to 6000 psig (0.3 to 414 bar) depending on specific model and pilot.
Temperature Range -450°F to 1000°F (-268°C to 538°C)，取决于主阀和导阀的配置和材料。
Body Materials Carbon Steel (Standard), Stainless Steel, Alloy Steels
End Connections Flanged (Various ANSI Classes), Butt-Weld, Screwed (NPT)
Orifice Size Wide range per API standards, from D (0.110 in²) to T (6.380 in²) and larger.
Seat Tightness Bubble-tight (Typically ANSI Class IV or better) up to 98-99% of set pressure.
Pilot Options Overpressure, Vacuum, Thermal Fire, Combination, etc.
FISHER™ C891
Key Parameters
Category Parameter Description / Typical Values
Power & Performance Operating Principle Rotating eccentric weight generating directional centrifugal force.
Centrifugal Force Variable, depending on model and air pressure. Can range from several hundred to thousands of pounds of force (e.g., up to 10,000 lbs or more).
Frequency (RPM) Typically in the range of 2,000 to 12,000 VPM (Vibrations per Minute). Adjustable via air pressure.
Air Supply Air Pressure Standard operating range: 40 to 100 psig (2.8 to 6.9 bar).
Air Consumption Varies significantly with size and speed. Can range from 5 SCFM to over 50 SCFM.
Physical Housing Material Cast Iron or Aluminum.
Mounting Multiple bolted foot mounts or basepad for secure attachment to the vessel.
Weight Varies by model, typically from 10 lbs (4.5 kg) to over 100 lbs (45 kg).
Environment Operating Temperature Standard range for ambient industrial conditions.
Noise Level Can be significant; optional mufflers are often available to reduce noise.
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