Liquid Surge Relief Valves
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1 THE NEXT GENERATION Liquid Surge Relief Valves Brochure# SURGE0416 EXPERTS IN SOFT SEAT VALVE TECHNOLOGY
2 CONTENTS INTRODUCTION AND FEATURES SECTION PAGE Introduction and Features...2 Application & Operation...3 Specifications Materials of Construction...4 Pressure Setting Data...4 Dimensions & Weights...5 Sizing...6 Part Numbering...7 Other Flow Safe Products...Back Cover design features include: Direct pressure setting of main piston without pilot or other controls that must vent or change state Furnished with precision self-relieving regulator for steady control of set pressure Superior flow capacities based on 3rd-party tests at high-capacity water test lab Side discharge for easy, cost-effective installation Repeatable leak-tight soft seat design Top entry for low-cost maintenance and low cost of ownership Standard 316 SS trim for superior corrosion resistance Piston dampening ring for chatter-free performance Self-draining and repairable in-line -20 to 500 F (-29 to 260 C) temperature range The policy of FLOW SAFE and its authorized assemblers is a commitment to value through: Environmentally compatible products Cost-efficient design with minimal parts Quality products, readily available Flexibility to meet unique customer needs No-hassle service 2
3 APPLICATION & OPERATION Dome reservoir Regulator Pressure gauge Dome gas Main valve body From dome gas supply Piston seal / wedge ring Liner Wear ring Piston Outlet System fluid Seat CLOSED Inlet OPEN Liquid product pipelines must be protected from liquid surges that may be caused by pump failure, rapid block valve closing, non-return check valve hard-shutting, emergency shutdown of a tank or loading system, or even a pump coming on or tripping. The magnitude of surge pressures varies, some virtually undetectable to those severe enough to cause major damage. These propagating waves, either increasing or decreasing rapidly, are commonly known as hydraulic transient surge or water hammer that can cause severe damage to liquid product pipelines, vessels, flanges, valving, and associated equipment. The Flow Safe SurgeFlow series has been developed exclusively for liquid surge protection. These valves are extremely simple and 100% reliable. The dome cavity volume on top of the main valve piston is filled with nitrogen gas to effect proper set pressure of the valve. Dome gas pressure is set according to the characteristic piston seat-to-seal area ratio for the given valve size (see Page 4). This dome load forces the main valve into a closed position using a soft elastomer seat, providing 100% tight shut-off. When surge pressure is sensed, the SurgeFlow valve piston opens immediately as the liquid fluid force acting under the piston overcomes the force from the dome gas acting on top. The piston continues to lift in proportion to the pressure surge, slightly compressing the dome gas. The closing cycle responds directly to pressure decay in the piping upstream of the SurgeFlow surge relief valve. SurgeFlow series valves are designed for accurate and repeatable performance. They will handle both minimum and/or maximum surge cases when called upon to relieve. Flow Safe suggests all surge relief valves be located nearest the point where maximum pressure can occur in the main pipeline, for optimal safety purposes. 3
4 SPECIFICATIONS MATERIALS OF CONSTRUCTION Pressure range Temperature range Valve body material Dome reservoir material Trim 1 material Seat / piston seal material Wedge / wear ring material 100 to 3705 psig (6.9 to 255 barg) -20 to 500 F (-29 to 260 C) SA-216 WCB or SA-352 LCC SA-106B, SA-53 E/B, or SA-234 WPB 316/316L stainless steel Buna-N, Viton, EPR, or as requested Graphite-filled PTFE 1 Internal wetted parts and gas control components Contact factory for availability of other materials or lower set pressures. Viton is a registered trademark of E.I. Du Pont de Nemours and Co. or affiliates. PRESSURE SETTING DATA Set pressure of valve multiplied by listed dome ratio gives corresponding regulated dome pressure value. Superimposed backpressure will reduce effective set pressure based on standard dome ratio setting; contact factory for adjustment. Valve Size Dome Ratio 1 1 x /2 x x x x x x x x Baseline values - may be adjusted based on actual test or operational experience. Ratio equals seat area divided by piston seal area. 4
5 DIMENSIONS & WEIGHTS Inlet Connection Outlet Connection 1 FNPT 2 FNPT Orifice Diameter, in (mm) Flow Area, in 2 (mm 2 ) A Dimensions, in (mm) 1 B C, approx. Approx. weight, lb (kg) 5.06 (129) 3.00 (76) 16 (406) 40 (18) 1-150# 2-150# 4.13 (105) 4.50 (114) 15 (381) 43 (20) 1-300# 2-150# (24.3) (464) 4.38 (111) 4.50 (114) 15 (381) 44 (20) 1-600# 2-150# 4.38 (111) 4.50 (114) 15 (381) 44 (20) 1-900# 2-300# 4.94 (126) 4.75 (121) 16 (406) 55 (25) # 2-300# (20.7) (336) 4.94 (126) 4.75 (121) 16 (406) 55 (25) 1-1/2 FNPT 3 FNPT 4.63 (118) 3.75 (95) 16 (406) 53 (24) 1-1/2-150# 3-150# 5.13 (130) 4.88 (124) 17 (432) 58 (26) (38.1) (1140) 1-1/2-300# 3-150# 5.13 (130) 4.88 (124) 17 (432) 63 (29) 1-1/2-600# 3-150# 5.13 (130) 4.88 (124) 17 (432) 63 (29) 1-1/2-900# 3-300# 6.38 (162) 6.75 (171) 18 (457) 88 (40) (34.0) (906) 1-1/2-1500# 3-300# 6.38 (162) 6.75 (171) 18 (457) 88 (40) 2-150# 3-150# 5.38 (137) 4.88 (124) 23 (584) 85 (39) 2-300# 3-150# (49.3) (1905) 5.38 (137) 4.88 (124) 23 (584) 90 (41) 2-600# 3-150# 5.38 (137) 4.88 (124) 23 (584) 90 (41) 2-900# 3-300# 6.56 (167) 6.75 (171) 24 (610) 110 (50) (42.9) (1446) # 3-300# 6.56 (167) 6.75 (171) 24 (610) 110 (50) 3-150# 4-150# 6.13 (156) 6.38 (162) 29 (737) 135 (61) 3-300# 4-150# (73.7) (4261) 6.13 (156) 6.38 (162) 29 (737) 145 (66) 3-600# 4-150# 6.38 (162) 6.38 (162) 29 (737) 145 (66) 3-900# 4-300# 7.50 (191) 7.13 (181) 30 (762) 175 (79) (66.6) (3489) # 4-300# 7.50 (191) 7.13 (181) 30 (762) 190 (86) 4-150# 6-150# 7.75 (197) 8.25 (210) 31 (787) 195 (88) 4-300# 6-150# (96.9) (7379) 7.75 (197) 8.25 (210) 31 (787) 195 (88) 4-600# 6-150# 7.75 (197) 8.25 (210) 31 (787) 200 (91) 4-900# 6-300# 9.81 (249) 9.19 (233) 33 (838) 265 (120) (92.0) (6655) # 6-300# 9.81 (249) 9.19 (233) 33 (838) 265 (120) 6-150# 8-150# 9.44 (240) 9.50 (241) 38 (965) 360 (163) 6-300# 8-150# (146.3) (16813) 9.44 (240) 9.50 (241) 38 (965) 360 (163) 6-600# 8-150# 9.69 (246) 9.50 (241) 38 (965) 415 (188) 8-150# # (276) (279) 41 (1041) 500 (227) 8-300# # (193.7) (29458) (276) (279) 41 (1041) 500 (227) 8-600# # (295) (279) 42 (1067) 560 (254) # # (295) (330) 44 (1118) 1000 (454) (243) (46355) # # (295) (330) 44 (1118) 1050 (476) # # (303) (395) 73 (1854) 1600 (726) (303) (72174) # # (322) (395) 74 (1880) 1700 (771) 1 See diagram on Page 4. Dimensions subject to change without notice. Contact Flow Safe for submittal drawing whenever specific dimensions are needed for construction. 5
6 SIZING The correct SurgeFlow size is determined by matching the flow coefficient Cv of available valves, tabulated below, to the Cv required for the application at a specified rise over set (overpressure or accumulation). This table is valid for set pressures of 100 psig (7 barg) and greater; contact the factory for lower set pressure requirements. Rise over Set Valve ASME Max. Cv 10% 20% 25% Size Inlet Rating (Full Open) Cv Cv Cv 1 x 2 NPT, /2 x 3 NPT, / x / x / x / x x x x Q = Cv (P 1 P 2 ) / SG where: Q = flow rate (gpm) SG = specific gravity Cv = Q SG / (P 1 P 2 ) P 1 = inlet pressure w/accumulation (psig) P 2 = backpressure (psig) Example: A capacity of 4000 bbl / hr of 40 API crude oil (SG = 0.825) is required at 500 psig set pressure, zero backpressure; system design pressure is ASME Class 300; max. desired line pressure = 550 psig (10% rise over set) 1. Determine required Cv: Q = (4000 bbl / hr) (hr / 60 min) (42 gal / bbl) = 2800 gpm Cv = / (500*1.10-0) = Select valve from table above with Cv = or greater at 10% rise over set. Choose 4-300# x 6-150# with Cv =
7 PART NUMBERING P R F R F 1 - C S - S S - V V N Options: N = NACE trim Y = Swagelok tube fittings Seals: B = Buna-N Y = HNBR V = Viton ( A ) H = AED Viton E = EPR / EPDM A = Aflas U = Polyurethane X = Perfluoroelastomer 1 MV Seat: O-ring material from Seals above Trim material: See Body material below, plus SM = SS + Monel Body material: CS = Standard carbon steel N5 = Inconel 625 CL = Low-temperature CS N0 = Inconel 600 SS = 316 SS / CF8M 6M = 6 Mo (254 SMO) SL = 316L SS / CF3M MO = Monel D4 = 22% Cr duplex SS D6 = 25% Cr duplex SS C3 = LC3 CS H2 = Hastelloy C / C22 H6 = Hastelloy C276 Outlet size / connection type / rating: See Inlet data below, plus 16 = 16 Inlet rating: 0 = Threaded 1 = 150# 3 = 600# 5 = 1500# 2 = 300# 4 = 900# Inlet connection type: FN = Female NPT RF = RF flange (ASME) RJ = RTJ flange (ASME) EF = RF flange (metric) EJ = RTJ flange (metric) Inlet size: 01 = 1 02 = 2 04 = 4 08 = 8 12 = = 1-1/2 03 = 3 06 = 6 10 = 10 0 for F9000 Model + Pilot + MV Seat type: 9 = F = No pilot + 5 = O-ring seat P = Pilot-operated or surge relief valve 1 If not specified, will include appropriate Kalrez, Chemraz, Perlast, or similar grade. 7
8 Experts in Soft-Seated Technology F84/85/88 Series Safety Relief Valve (Gas) - ASME VIII F84L/88 Series Liquid Relief Valve - ASME VIII F70U Series Unloader Valve F7000/8000 Series Pilot-Operated Relief Valve - ASME VIII F70PR Series Pilot-Operated Relief Valve - DOT Leaders in true High Performance with commitment to value through: 24/7 service, repair, and support Soft seats offering unsurpassed tightness Large coefficients and orifice areas = Best capacities ASME Sec. VIII, API, DOT, ISO 9001, CE, Marine class societies (e.g., DNV, BV) Trained representatives with solid factory support Quick-ship program through Flow Safe Supply YOUR AUTHORIZED REPRESENTATIVE Executive Office Houston Distribution Center 3865 Taylor Road Tower Oaks Blvd. Orchard Park, NY Houston, TX (716) (832) (716) Fax (716) Fax Inquiries: info@flowsafe.com
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