1. General Introduction
Farris 2600 pressure relief valves are designed to function equally well on air, gases and steam or in liquid service, conforms to API 526 standard, 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. Both conventional and balanced bellow design are available, full nozzle design guarantee a high stable flow coefficient, balanced bellow design provides consistent capacity, set pressure and blow down at elevated backpressure encountered when valves discharge into headers or where other devices produce variable backpressure in the relief manifold system. Nozzle can be removed from body with the blow down ring attached.
2. General Specification
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# to 2500# |
Suitable for | Air, Gas, Vapor, Steam & Liquid Service |
Materials of Construction | Carbon Steel, Stainless Steel, Low/High Temperature Alloy Steels, Monel, Hastelloy C, Duplex, NACE Compliant Materials |
Certifications | 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 (Dubai of UAE) GOST-R (Russian) US Coast Guard Nuclear – 10 CRF 50 Appendix B, NCA-4000, NQA-1 N285.0 First Point Assessment Limited |
3. Model selection of 2600 pressure relief valves
Main Code | Suffix Codes | Description | |||||||
Prefix code H | Designates high pressure versions. Used for "Q", "R","T" &"U" orifices only | ||||||||
26 | 2600 pressure relief valves | ||||||||
Orifice Areas | D | API=0.110 in2, Actual=0.150 in2; / API=71 mm2, Actual=97 mm2 | |||||||
E | API=0.196 in2, Actual=0.225 in2; / API=126 mm2, Actual=145 mm2 | ||||||||
F | API=0.307 in2, Actual=0.371 in2; / API=198mm2, Actual=239 mm2 | ||||||||
G | API=0.503 in2, Actual=0.5591in2; / API=325 mm2, Actual=361 mm2 | ||||||||
H | API=0.785 in2, Actual=0.8731 in2; / API=506 mm2, Actual=563 mm2 | ||||||||
J | API=1.287 in2, Actual=1.430 in2; / API=83 mm2, Actual=923 mm2 | ||||||||
K | API=1.838 in2, Actual=2.042 in2; / API=1186 mm2, Actual=1317 mm2 | ||||||||
L | API=2.853 in2, Actual=3.170 in2; / API=1841 mm2, Actual=2045 mm2 | ||||||||
M | API=3.60 in2, Actual=4.000 in2; / API=2323 mm2, Actual=2581 mm2 | ||||||||
N | API=4.34 in2, Actual=4.822 in2; / API=2800 mm2, Actual=3111 mm2 | ||||||||
P | API=6.38 in2, Actual=7.087 in2; / API=4116 mm2, Actual=4572 mm2 | ||||||||
Q | API=11.05 in2, Actual=12.27 in2; / API=719 mm2, Actual=7916 mm2 | ||||||||
R | API=16.0 in2, Actual=17.78 in2; / API=10323 mm2, Actual=11471 mm2 | ||||||||
T | API=26.0 in2, Actual=28.94 in2; / API=16774 mm2, Actual=18671 mm2 | ||||||||
U | Actual=31.5 in2; / Actual=203.2 mm2 | ||||||||
V | Actual=49.4 in2; / Actual=318.7 mm2 | ||||||||
W | Actual=63.62 in2; / Actual=410.2 mm2 | ||||||||
W2 | Actual=104.0 in2; / Actual=670.8 mm2 | ||||||||
X | Actual=113.1 in2; / Actual=729.5 mm2 | ||||||||
Y | Actual=143.1 in2; / Actual=923.0 mm2 | ||||||||
Z | Actual=176.7 in2; / Actual=1139.7 mm2 | ||||||||
Construction | A | Conventional construction | |||||||
B | BalanSeal construction | ||||||||
C | Conventional with O-ring seat pressure seal | ||||||||
D | BalanSeal with O-ring seat pressure seal | ||||||||
E | BalanSeal with auxiliary balancing piston | ||||||||
F | BalanSeal with auxiliary balancing piston and O-ring seat pressure seal | ||||||||
T | Teflon seat, conventional | ||||||||
U | Teflon seat, BalanSeal | ||||||||
Temperatures & Materials | 1 | Inlet temperature -20 to 800℉, Carbon steel body & bonnet, Chrome Alloy spring | |||||||
2 | Inlet temperature 451 to 800℉, Carbon steel body & bonnet, Chrome Alloy spring | ||||||||
3 | Inlet temperature 800 to 1000℉,Chrome Moly steel body & bonnet, High temperature Alloy spring | ||||||||
4 | Inlet temperature 1000 to 1200℉, special order of material | ||||||||
5 | Inlet temperature 1201 to 1500℉, special order of material | ||||||||
1 | Inlet temperature -21 to -75℉, Use "S3" Trim Options | ||||||||
1 | Inlet temperature -76 to -450℉, Use "S4" Trim Options | ||||||||
Inlet Class | 0 | ASME Flanges Class 150 | |||||||
1 | ASME Flanges Class 300, lightweight valve | ||||||||
2 | ASME Flanges Class 300, heavyweight valve | ||||||||
3 | ASME Flanges Class 600 | ||||||||
4 | ASME Flanges Class 900 | ||||||||
5 | ASME Flanges Class 1500 | ||||||||
6 | ASME Flanges Class 2500 | ||||||||
Special Construction (If applicable) | A | Expanded API sizes: air, steam and gas service | |||||||
B | Expanded API sizes: ASME liquid valve | ||||||||
C | Expanded API sizes: ASME Code Section VIII exposed spring design | ||||||||
D | Valve suitable for heat transfer service-vapor | ||||||||
E | Valve suitable for heat transfer service-liquid | ||||||||
F | Expanded API size valves suitable for heat transfer service-vapor | ||||||||
G | Expanded API size valves suitable for heat transfer service-liquid | ||||||||
L | ASME Code certified for liquid, air, steam and gas service | ||||||||
S | ASME Code Section VIII exposed spring design | ||||||||
Inlet Facing | 0 | Special Facings | |||||||
1 | Raised Face, ASME Std. (125 to 160 AARH) | ||||||||
2 | Large Female, ASME Std. | ||||||||
3 | Small Male, ASME Std. | ||||||||
4 | Small Female, ASME Std. | ||||||||
5 | Large Tongue, ASME Std. | ||||||||
6 | Large Groove, ASME Std. | ||||||||
7 | Small Tongue, ASME Std. | ||||||||
8 | Small Groove, ASME Std. | ||||||||
9 | Ring Joint (octagonal), ASME Std. | ||||||||
H | 63-83 AARH Smooth, Finish RF | ||||||||
J | 63 to 83 AARH (outlet only) | ||||||||
K | 63 to 83 AARH (inlet & outlet) | ||||||||
X | Special Welded Connections | ||||||||
Cap Construction | 2 | Screwed Cap | |||||||
3 | Bolted Cap | ||||||||
4 | Packed Lever | ||||||||
7 | Open Lever | ||||||||
8 | Remoter (with Packed Lever) | ||||||||
Test Gag | 0 | Without Gag | |||||||
1 | With Gag | ||||||||
Special Material | Special Material for Corrosive Service Table |
4. Material selection table for corrosion Service
Designation | Special Material Description | |||
Internal Parts | ||||
Body Bonnet, Cap | Internal Parts | |||
Nozzle & Disc | Other | Springs & Buttons | ||
/S1 | Standard | 316 | 316 | Chrome Alloy Spring, 316 Buttons |
/S3 | 316 | 316 | 316 | Chrome Alloy Nickel Plated Spring, 316 Buttons |
/S4 | 316 | 316 | 316 | 316 |
/H1 | Standard | Hastelloy C | Standard | Standard |
/H2 | Standard | Hastelloy C | Hastelloy C & Monel | Chrome Alloy Nickel Plated Spring, 316 Buttons |
/H3 | Hastelloy C | Hastelloy C | Hastelloy C | Chrome Alloy Nickel Plated Spring, 316 Buttons |
/H4 | Hastelloy C | Hastelloy C | Hastelloy C | Hastelloy C |
/M1 | Standard | Monel | Standard | Standard |
/M2 | Standard | Monel | Monel | Chrome Alloy Nickel Plated Spring, 316 Buttons |
/M3 | Monel | Monel | Monel | Chrome Alloy Nickel Plated Spring, 316 Buttons |
/M4 | Monel | Monel | Monel | Inconel Spring, Monel Buttons |
/N1 | Carbon Steel (NACE) | 316 (NACE) | 316 | Inconel Spring, 316 Buttons |
/LB | SA-352 Gr. LCB (Cap - 316) | 316 | 316 | Standard |
/LC | SA-352 Gr. LCB (Cap - 316) | 316 | 316 | Standard |
/N4 | 316 (NACE) | 316 (NACE) | 316 | Inconel Spring, 316 Buttons |
5. Bill of material of 2600 conventional type pressure relief valves
6. Bill of material of 2600 balanced bellow type pressure relief valves
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