Farris Engineering

Farris' workhorse direct spring-operated relief valve, opening automatically once inlet pressure exceeds the spring set point — no external power or signal required.

• ASME Section VIII certified
• Rated to 800 psig
• Air, steam & liquid service
• Threaded or flanged connections

Close-up of a FAST-tagged direct spring safety valve, showing the exposed spring housing and lifting lever used for manual test and inspection.

• ASME Section VIII certified
• Manual test lever
• Open-spring bonnet design
• Flanged inlet/outlet

A threaded direct-spring valve with a prominent manual lifting lever and identification nameplate, sized for smaller process lines.

• Threaded inlet connection
• Manual lifting lever
• Stamped identification nameplate
• Air, steam & liquid service

A flanged direct-spring valve with a full-length lifting lever, allowing manual operational testing while the line stays in service.

• Flanged inlet & outlet
• Full-length test lever
• ASME/NB-certified
• Air, steam & water service

A compact threaded spring-loaded valve sized for smaller lines carrying air, steam, vapor or liquid, where a full flanged body isn't required.

• Threaded connections
• Air, steam, vapor & liquid
• Compact, space-saving body
• FAST authorized service tag

A threaded spring-loaded relief valve with a compact lifting lever and identification plate for field verification.

• Threaded connection
• Compact lifting lever
• Field-verifiable set pressure
• Air, steam, vapor & liquid

A direct spring-loaded relief valve that reaches full lift at set pressure, with external blowdown adjustment and a manual lifting lever for in-service testing.

• ASME Section VIII certified
• Direct spring-loaded — full lift at set
• Soft seat design
• External blowdown control

A compact, space-saving direct-spring valve for lighter-duty relief service where a smaller footprint is needed.

• Space-saving body
• Threaded connection
• Lighter-duty relief service
• ASME Section VIII certified

A pilot-operated valve uses process pressure itself, through a small external pilot, to hold the main valve closed until set pressure is reached — enabling higher operating ratios and modulating relief.

• Snap-acting or modulating pilot
• Semi- or full-port nozzle
• Higher operating pressure ratio
• Stainless pilot assembly

A larger pilot-operated valve fitted with dual gauge and test connections and a stainless pilot assembly, suited to high-capacity process protection.

• Dual gauge/test connections
• Stainless pilot assembly
• High-capacity flanged body
• Semi- or full-port nozzle

A Farris-branded pilot-operated valve with an external pilot assembly and isolation valves for online testing without a process shutdown.

• Online test isolation valves
• External pilot assembly
• No process shutdown required for testing
• Flanged inlet & outlet

A wireless monitoring module that clips onto an in-service relief valve, tracking lift events and pressure conditions in real time without interrupting the process.

• Real-time lift & leak detection
• Wireless data transmission
• Retrofits to existing valves
• Backed by factory FAST service network

The compact iNSURE® module mounted directly on the valve outlet, giving a continuous read on relief valve condition between turnarounds.

• Continuous condition monitoring
• Compact outlet-mounted module
• Reduces unplanned inspection
• Backed by factory FAST service network

The same direct-spring design available across multiple body materials and connection styles, so the right valve fits the piping and service already on site.

• ASME/NB-certified
• Flanged or threaded body
• Carbon steel or stainless trim
• Air, steam & water service

Farris' relief valve line spans compact threaded models to heavy flanged bodies, covering light instrument air through high-capacity process protection.

• Multiple body sizes & materials
• Threaded & flanged connections
• Balanced-bellows options available
• Backed by FAST authorized service

A further view of the Farris relief valve line, spanning compact direct-spring models to larger flanged, lever-operated designs.

• Compact to large-bore bodies
• Direct-spring & pilot designs
• Multiple finishes & materials
• Backed by FAST authorized service

A flanged valve and a compact threaded valve shown side by side, illustrating the range of body sizes available for different line sizes.

• Flanged & threaded options
• Range of body sizes
• Matched finish across the line
• Air, steam & liquid service

Two pilot-assisted relief valves from the Farris line, each fitted with external sensing and test connections for high-capacity duty.

• External pilot sensing lines
• Test connections included
• High-capacity process protection
• Flanged process connections

A direct spring-operated valve holds a precision-machined disc against the nozzle seat under spring force, lifting cleanly once inlet pressure overcomes the set pressure.

• Precision-lapped seat & disc
• Adjustable spring set pressure
• Guided stem for repeatable lift
• Field-serviceable internals

Another cutaway view of the direct-spring mechanism, showing the guided spindle, spring chamber and seat arrangement in detail.

• Guided spindle & seat
• Enclosed spring chamber
• Consistent, repeatable lift
• Field-serviceable internals

A relief valve fitted with a handwheel and actuator bonnet for remote or automated operation, where local manual reset isn't practical.

• Manual handwheel override
• Actuator-ready bonnet
• Suited to remote/automated operation
• Flanged process connection