07 2600 Series 8718

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Farris EngineeringSeries 2600 Safety Valves

The aim of this presentation is to provide an overview of the Farris 2600 Series ASME Section VIII pressure relief valves.

3 | May 6, 2019 | Proprietary © Curtiss-Wright

Applications, References & Overview Farris’ 2600, 2600S & 2600L pressure relief

valves are used wherever safety valves according to API 526 are specified, e.g.:– Refineries– Chemical industry– Petrochemical industry– Oil and gas – Onshore and Offshore– Vessel and piping systems– Floating Production Storage and Offloading (FPSO)

AirSteamWater

Product Scope

Conventional Design

Balanced Bellows Design

BalanSeal Bellow and Balanced Piston Design

2600L Liquid and 2600S Exposed Spring Design

2600L LIQUID 2600S EXPOSED SPRING

2600 Series Restricted Lift

Full Lift Valve:Valve capacity controlled by size of the valve nozzle orifice area.

Restricted Lift Valve: Capacity controlled by the cylindrical discharge opening between the seating surfaces created when disk lifts above the seat [Curtain Area].

Valve Lift Types

2600 Series Restricted Lift Why Use Restricted Lift Valves

• Orifice areas of adjacent orifices on API type valves increase from 21% to 73%.

• Restricting lift allows you to more closely match the valves ratedcapacity to the system requirements.

• Mitigate problem of inlet pressure loss exceeding APIrecommended limit of 3% of set pressure.

Farris Lift Restriction Method - Spacer• Does not require modification of standard internal parts to achieve lift

restriction.• Does not require use of extra wire sealing or locking mechanism like

other methods, such as use of adjustable gag screws.

Basic Valve Requirements• Each valves actual full lift must first be verified before the lift

restriction spacer is manufactured and installed.• Valves cannot be restricted to less than 30% of the full rated lift or

0.080”. [Per ASME Code, paragraph UG-134]• Restricted lift nameplate capacity is determined by multiplying the

capacity at full rated lift by the ratio of restricted lift to the full rated lift. [Per ASME Code, paragraph UG-133]

• Spring Selections – Use standard 2600 spring charts.

2600 Series Restricted LiftMarking & TaggingType Number contains “-RL” suffix.Restricted lift value included on capacity line.Capacity listed for restricted lift value.Lift restriction spacer marked with part number and as machined height

Approved Products

• 2600 Series - Air, gas, vapor & steam service. Current design only. National Board Certification Number 57406

• 2600L Series – Liquid service. Current design only. National Board Certification Number 57417.

• 2600L – Air, gas, vapor & steam service.• Coefficients of discharge identical to full lift designs

O-RINGS

2600 D ThroughKOrifice O-Ring

2600 L ThroughTOrifice O-Ring

Standard Materials

Item Component Standard 316 Stainless Steel High Temp (800 – 1000 F)

Material Carbon Steel AusteniticStainless Steel

Chrome Molybdenum Steel

2 Bonnet WCB CF8M WC6

5 Spring Chrome Alloy 316 St. St. high temp.,alloy steel

4 Disc 316 St. St. 316 St. St. 316 St. St.

3 Nozzle CF8M CF8M CF8M

1 Body WCB CF8M WC6

Materials for Corrosive Service

Item Component Materials for Corrosive and Low Temp Service

Material Monel Hastelloy NACE Low Temp. Carbon Steel Duplex

2 Bonnet Monel Hastelloy C WCB (NACE)CF8M (NACE)

LCBLCC

DuplexSuper Duplex

5 Spring Inconel X750 Inconel X750 Inconel X750 Chrome Alloy Inconel X750

4 Disc Monel Hastelloy C 316 St. St. (NACE) 316 St. St. Duplex

Super Duplex

3 Nozzle Monel Hastelloy C CF8M (NACE) CF8M DuplexSuper Duplex

1 Body Monel Hastelloy C WCB (NACECF8M (NACE)

LCBLCC

DupexSuper Duplex

Options

Open Lever Packed Lever Bolted Cap Balanced Bellows Test Gag

Open Bonnet O-Ring Disc Stellite SeatingSpecial

Materials/Connections Lift Indicator

Nomenclature• Example: 26DA12L-120/S4

Global Approvals

Thank You

http://farris.cwfc.com

Farris Engineering10195 Brecksville RoadBrecksville, OH 44141 USA

07 2600 Series 8718

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