Farris Engineering produces spring-loaded and pilot-operated safety relief valves for refinery, chemical, petrochemical and power service. The valves are specified to API standards and are usually supported by test and repair records.
Surplus relief valves arrive from turnaround replacements, spare holdings that were never installed, and unit changes that altered the required set pressure or capacity.
Brand disclosure. Farris is a trademark of its respective owner. Louisiana Valve Buyer is an independent purchaser of surplus equipment and is not affiliated with, authorised by, sponsored by or endorsed by Farris or its owner. These pages describe equipment we are willing to buy; they do not represent manufacturer service, repair authorisation, calibration, pressure certification, product compatibility, or a statement that any used item is ready for future process service.
Seller guides
Farris equipment, in detail
What we look at
Reviewing Farris equipment
Nameplate
Set pressure, capacity, orifice designation, size and material. All of it is on the plate.
Pilot assembly
On pilot-operated valves, the pilot is the value. Keep it with the valve.
Records
Test and repair records, and any authorised repair shop documentation.
A detailed, accurate list is more useful than a generic brand mention. If you can tell us the model, the size, the class and what is attached, the review is straightforward. If you cannot, photographs of the nameplates will get us most of the way.
What to preserve
Before anything is disconnected
Keep the assembly together, keep the tag on the valve, and photograph the nameplates before anything is separated. Most of the value lost on branded equipment is lost in the ten minutes after removal, not in the years before it.
Questions sellers ask
Do you buy used Farris equipment?
Yes. We buy Farris equipment as surplus, in single lots or as part of a whole crib. We buy it as equipment, not as scrap, and we make no claim about its fitness for future service.
Is Farris surplus worth more than unbranded equipment?
Often yes, because the brand tells a buyer what the specification is and where parts come from. The premium depends on the model, the condition and the documentation.
What if the nameplate is missing?
Send photographs of the body and any cast markings. Brand and model can often be established from the shape and the marking, though the price reflects the uncertainty.