Series 2600

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Series 2600

Pressure Relief Valves

Table of ContentsIntroduction .............................................................................................. 1 The Farris Advantage ................................................................................ 2 2600 Series Design .................................................................................. 3 2600 Series Construction ......................................................................... 4 2600 Series Metallurgy ............................................................................ 5 2600 Series Operation ...........................................................................6-7 General Technical Information................................................................... 8 Definitions ................................................................................................ 9

AccessoriesCap and Lever Materials ......................................................................... 68 Test Gag Installations.............................................................................. 69 Remoter, Bugproof Vent and Valve Position Indicators ............................. 70 Steam Jacketing Methods ...................................................................... 71

Dimensions and WeightsValve Dimensions and Weights ..........................................................72-75 ANSI Flange Connection Types................................................................ 76 ANSI Flange Dimensions......................................................................... 77 DIN Flange Dimensions........................................................................... 78

ScopeType Numbering System....................................................................10-11 Ordering Information, Replacements....................................................... 10 Standard Bills of Material...................................................................12-13 Series 2600L Certified Design ................................................................ 14 Series 2600S Exposed Spring................................................................. 15 2600/2600L Balanced Piston Design ...................................................... 16 Heat Transfer Fluid Service/Low Temperature ......................................... 17 Corrosive and Low Temperature Materials .........................................18-20 Sour Gas (H2S) Materials ........................................................................ 21 O-Ring Seat Pressure Seal.................................................................22-23 Orifice Selection Tables and Charts, U.S. Units ...................................24-38 Orifice Selection Tables and Charts, Metric Units ...............................43-56 Super Capacity Valve Scope.................................................................... 61 Super Capacity Bills of Materials .......................................................62-63 Valve Pressure Limits (Special Materials) ...........................................79-83

SizingSizing Equations and Nomenclature........................................................ 84 Conventional Valves ................................................................................ 84 BalanSeal Valves .................................................................................... 85 Fluid Data ............................................................................................... 86 Sizing Factors for Vapors & Gases........................................................... 87 Sizing Factors for Steam ......................................................................... 88 Sizing Factors for Liquids...................................................................89-91 Conversion Factors ................................................................................. 92

Capacity TablesAir 10% Overpressure, U.S. Units............................................................ 39 Steam 10% Overpressure, U.S. Units ...................................................... 40 Water 10% Overpressure Code 2600L, U.S. Units ................................... 41 Water 25% Overpressure, Non Code, U.S. Units ...................................... 42 Air 10% Overpressure, Metric Units ........................................................ 57 Steam 10% Overpressure, Metric Units .................................................. 58 Water 10% Overpressure, Code 2600L, Metric Units .............................. 59 Water 25% Overpressure, Non Code, Metric Units .................................. 60 Super Capacity 2600 Series Overpressure, U.S. Units ........................64-65 Super Capacity 2600 Series Overpressure, Metric Units ....................66-67

IntroductionThis catalog covers Series 2600, 2600S and 2600L pressure relief valves including the latest information available to assist you in the sizing and selection of the proper valves for your application. Farris pressure relief valves have over a half century of proven performance providing automatic and positive protection against overpressure in thousands of industrial plants and facilities worldwide. Our earned reputation as the First Line of Safety is the result of countless Farris innovations combined with progressive engineering, sound design and high quality production. Our headquarters and manufacturing facility located in Brecksville, Ohio, oversees the production of these superior valves at plants in the United States, Canada, the United Kingdom, and China. The Brecksville facility is also responsible for research and development, engineering, manufacturing technology, and sales and marketing. We offer the services of our engineering sales representatives throughout the world as well as our Farris Authorized Service Teams (FAST Centers) and headquarters staff to extend you every possible customer service.

WarrantyAll products manufactured by Farris Engineering are warranted free of defects in material and workmanship when used within the range recommended for a period of one year after installation or eighteen months from delivery. When authorized, any defective product may be returned to the factory and if found defective will be repaired or replaced free of charge, solely at the discretion of Farris Engineering, ex-works our factory. No charge for labor or other expense incurred will be allowed, as the liability of Farris Engineering is measured by the refund price of the defective product only. All warranties are based on the product being used within the range recommended and does not cover damages or defects due to normal wear and tear, misuse, alteration or neglect. The purchaser shall determine the suitability of the product for use and assumes all risks and liabilities in connection therewith. This warranty does not cover the performance of valves tested at site on test equipment that is not to the same technical standard as that used by the manufacturer.

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The Farris AdvantageFarris pressure relief valves are designed to automatically protect your equipment against excessive overpressure. Every care is taken in the development, design and production of these valves to ensure complete dependability in performance. Our constant objective is to provide a superior valve that will assure ultimate protection at the lowest cost, both initially and throughout its service life. What is the Farris Advantage?

Easy sizing and selection of valves using Farris catalogs and/or SizeMaster Sizing and Selection software. A method of specification and ordering that is simple, accurate and complete. Accurate and timely shipments in accordance with our computerized inventories. Factory-trained engineering/sales staff to assist you in solving your pressure relief valve problems. Streamlined design to allow you maximum flexibility in the use and repair of your Farris pressure relief valves. Assurance of the utmost safety of your equipment when protected by a Farris valve. Maximum seat tightness in accordance with stringent inspection and testing. Complete repair and maintenance information that affords you repairs in your own maintenance shop. Maximum interchangeability of parts. Continuous availability of replacement parts at our plants and authorized service centers for immediate shipment to meet your emergency requirements. Long service life of a soundly-designed pressure relief valve made from materials suited to your service. Twenty-four hour/seven-day customer support is achieved via our FAST Centers and our Web-based CW Commerce Program accessible to all Farris Representatives.

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2600 Series DesignValve SelectionThis catalog simplifies the sizing and selection of Series 2600 process pressure relief valves. The pressure relief valves are presented here in an easy-to-understand format. Unless otherwise stated, references made to the Code refer specifically to ASME Section VIII, Division 1.

Certified Capacity Code ComplianceThe Series 2600 pressure relief valves have been carefully constructed and tested in accordance with the requirements of the ASME Pressure Vessel Code, Section VIII. Their capacity rating for the applicable fluids is certified by the National Board of Boiler and Pressure Vessel Inspectors.

Range of Service ApplicationSeries 2600 pressure relief valves are designed to function equally well on air, gases and steam or in liquid service. For specific Code applications in liquid service, Farris 2600L relief valves offer superior performance. This catalog covers orifice ranges D through Z.% of Set Press.

Approx. Opening Pressure100 90 80

Nozzle DesignThe Farris full nozzle pressure relief valve design (Fig 1) incorporates a nozzle shape to provide: 1. A high stable flow coefficient. 2. Greater strength to