2600 Series & 2600L Series - Process Valve

Product Brand: Farris

  • Conforms to API 526
  • Full Nozzle Design
  • Integral Cast Flanges
  • Metal Seat with optional o-ring
  • Balanced Bellows option
  • Open Bonnet and Lever Assemblies option
  • Adjustable Blowdown
  • 2600L – Multiple Service Single Trim Design option
General Specifications:
Size 1” x 2” to 20” x 24”
Orifice Areas D (0.15in2) to Z (176.7 in2)
Set Pressure Ranges 15 to 6000 psig (1.0 to 413 barg)
Temperature Ranges -320 to 1500°F (-195 to 815°C)
Flange Classes 150# – 2500#
Suitable for Air, Gas, Vapor, Steam & Liquid Service
Materials of Construction Carbon Steel
Stainless Steel
Low/High Temperature Alloy Steels
Hastelloy C
NACE Compliant Materials


  • ASME/NB Section VIII and III for Air, Steam and Water
  • CSA B51 (Canada CRN)
  • ISO 9001- 2008
  • PED 97/23/EC (European Pressure Equipment Directive)
  • ATEX 94/9/EC (European Potentially Explosive Atmospheres)
  • CSQL (China)
  • GOST-R (Russian)
  • US Coast Guard
  • Nuclear – 10 CRF 50 Appendix B, NCA-4000, NQA-1 N285.0
  • First Point Assessment Limited

pressure relief valve - design & operation

Farris’s pressure relief valves are designed to automatically protect your equipment against excessive overpressure. The Series 2600 pressure relief valves are designed to function equally well on air, gases, steam, or liquid service.


The pressure relief valve design incorporates several features which allow this valve to take a maximum amount of piping strain without hampering the functional characteristics of the valve or contributing to serious leakage.



The superior strength built into the body of the Farris pressure relief valve to resist these discharge piping strains materially reduces the deflection and distortion in the valve and reduces the leakage encountered, when at times, discharge piping strains become excessive.

The valve is engineered for exceptional tightness because of positive alignment, a high strength disc design, the elimination of thermal distortion and

optimum seating surface finish.



The Farris full nozzle pressure relief valve design incorporates a nozzle shape to provide:

  1. A high stable flow coefficient.
  2. Greater strength to resist possible discharge piping strains.
  3. Wrenching provisions on raised face nozzles where they will not interfere with the flow path.

The superior design allows easy maintenance by simplifying nozzle removal and assembly.


What is an air pressure relief valve?

An air pressure relief valve, also known as a pneumatic pressure relief valve, controls air within a compressed air system.


It is a valve that is designed to detect and prevent changes in pressure which could lead to damage and failure in a number of applications. If the desired pressure is exceeded, the valve releases the excess pressure.


How do I choose a pressure relief valve?

When choosing a pressure relief valve, the factors you should consider before selecting are:

  • Service/Application
  • Connection size and type
  • Set pressure & back pressure
  • Temperature
  • Required capacity

What are the three common types of relief valves?

The three most common types of relief valves are:

  • Conventional spring-loaded
  • Balanced spring-loaded
  • Pilot operated
2600 Series & 2600L Series - Process Valve
Product Enquiry>>
 Security code
* Required  How we use this information




Brecksville, Ohio
T: +1.440.838.7690

Edmonton, Canada

Ontario, Canada - (Nuclear)
T: +1.519.756.4800

Sao Carlos-SP, Brazil
T: +55.1621.078741


Corby, UK
T: +44.1536.425980


Beijing, China
T: +86.106.5058966

New Delhi, India
T: +91.11.49756200-299