TOM WHEATLEY Piston Check Valves Brochure
User Manual: TOM WHEATLEY Piston Check Valves Brochure Resource Library
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TOM WHEATLEY Piston Check Valves Designed to safely prevent backflow, preventing damage to pumps and compressors Table of Contents TOM WHEATLEY PISTON CHECK VALVES Features................................................................................................. 1 How to Order........................................................................................ 2 Dimensions............................................................................................ 3 Materials of Construction....................................................................... 4 Pressure-loss Curves / Flow Coefficients.................................................. 5 TOM WHEATLEY Piston Check Valves FEATURES Easy access to all valve internal parts through cover Spring provides positive closure Orifice controls closing speed of piston, dampening piston response to changes in flow Ball check valve inside piston allows quick opening Liner Piston Integral or removable seat designs available; metal overlays also are available The greater the backflow pressure, the tighter the seal Available in RF or RTJ end connections. When pressure surges and pulsations are prevalent in a flow system, Cameron’s TOM WHEATLEY piston check valves are an efficient solution to system protection. ® Due to a unique non-slam design, TOM WHEATLEY piston check valves have provided years of uninterrupted service downstream from reciprocating pumps and compressors, and in other applications where conventional check valve designs would be subjected to excessive wear. In addition, the TOM WHEATLEY piston check valve top entry design allows for easy access and replacement of all valve internal parts with reduced downtime. Smooth, Reliable Prevention of Backflow In the absence of pressure differential, a TOM WHEATLEY piston check valve rests in the closed position due to gravity and spring force. Pressure on the upstream end of the valve lifts the piston off the seat and allows flow. As flow varies, the piston of the TOM WHEATLEY piston check valve floats within a cylinder. Should the flow cease, the piston lowers and seats to create a bubble-tight prevention of backflow. A ball check mechanism and an adjacent orifice within the piston help to extend valve life by dampening piston movement and eliminating slamming or chattering in the event of sudden pressure surges or erratic flow conditions. The orifice size affects the degree of piston movement and is optimally selected at the factory to meet the requirements of a specified flow range. The TOM WHEATLEY piston check valve is available with the following features: • • • • Soft seal Metal-to-metal seal Renewable seat A variety of body and trim materials As a result of the piston and seat design, the greater the backpressure acting on the piston, the tighter the seal. TOM WHEATLEY piston check valves comply with API 6D/ ISO 14313, ASTM B 16.34 and NACE MR0175/ISO 15156, and all TOM WHEATLEY piston check valves are designed for horizontal service. TOM WHEATLEY piston check valves must be ordered specifically for vertical flow when intended for that service. 1 HOW TO ORDER Valve Size ASME End Connection/ Trim (in.) Pressure Class Seat Code 02 06 75 10B Ordering Data 02 = 2” 01 = ASME 150 73 = RF – Renewable Seat 03 = 3” 03 = ASME 300 74 = RTJ – Renewable Seat 04 = 4” 06 = ASME 600 75 = RF – Integral Seat 06 = 6” 09 = ASME 900 76 = RTJ – Integral Seat 08 = 8” 15 = ASME 1500 Materials Code 10 = 10” 12 = 12” Represents 2” ASME 600 RF with Integral Seat 10B Materials Code – See standard materials of constructions. Note: The alpha character represents the seal material code. Body ASTM A216 Gr. WCC Cover A516 Gr. 70 Cover Seal Buna-N Bolting ASTM A193 Gr. B7, ASTM A194 Gr. 2H Liner ASTM A29-1018 with ENP Piston 410 Stainless Steel Piston Seal Buna-N Seat Integral Piston Rings Cast Iron Note: Other materials of construction and seals are available upon request. 2 ASME Class 150-1500, 2” through 12” DIMENSIONS D Removable Seat Detail C C 8” - 12” E 2” - 6” Size B A Nominal Size in. (mm) 2 (50) 3 (80) 4 (100) 6 (150) 8 (200) 10 (250) 12 (300) ASME Class A (RF) A (RTJ) B C D E 150 300 600 900 1500 150 300 600 900 1500 150 300 600 900 1500 150 300 600 900 1500 150 300 600 900 150 300 600 900 150 300 600 900 10.50 (267)* 10.50 (267) 11.50 (292) 14.50 (368) 14.50 (368) 12.50 (318)* 12.50 (318) 14.00 (356) 15.00 (381) 18.50 (470) 14.00 (356)* 14.00 (356) 17.00 (432) 18.00 (457) 21.50 (546) 17.50 (445)* 17.50 (445) 22.00 (559) 24.00 (610) 27.75 (705) 19.50 (495) 21.00 (533) 26.00 (660) 29.00 (737) 24.50 (622) 24.50 (622) 31.00 (787) 33.00 (838) 27.50 (699) 28.00 (711) 33.00 (838) 38.00 (965) 11.13 (283)* 11.13 (283) 11.63 (295) 14.63 (372) 14.63 (372) 13.13 (334)* 13.13 (334) 14.13 (359) 15.13 (384) 18.63 (473) 14.63 (372)* 14.63 (372) 17.13 (435) 18.13 (461) 21.63 (549) 18.13 (461)* 18.13 (461) 22.13 (562) 24.13 (613) 28.00 (711) 20.00 (508) 21.63 (549) 26.13 (664) 29.13 (740) 25.00 (635) 25.13 (638) 31.13 (791) 33.13 (842) 28.00 (711) 28.63 (727) 33.13 (842) 38.13 (969) 5.25 (134) 5.25 (134) 5.75 (146) 7.25 (184) 7.25 (184) 6.25 (159) 6.25 (159) 7.00 (178) 7.50 (191) 9.25 (235) 7.00 (178) 7.00 (178) 8.50 (216) 9.00 (229) 10.75 (273) 8.75 (223) 8.75 (223) 11.00 (280) 12.00 (305) 13.88 (353) 9.75 (248) 10.50 (267) 13.00 (330) 14.50 (368) 12.25 (311) 12.25 (311) 15.50 (394) 16.50 (419) 13.75 (349) 14.00 (356) 16.50 (419) 19.00 (483) 9.25 (235) 9.25 (235) 9.50 (241) 10.00 (254) 10.25 (260) 10.75 (273) 10.75 (273) 11.13 (283) 11.38 (289) 13.13 (334) 11.50 (292) 11.50 (292) 11.88 (302) 12.37 (314) 13.00 (330) 16.38 (416) 16.38 (416) 17.07 (434) 17.25 (438) 15.75 (400) 13.00 (330) 13.88 (352) 14.88 (378) 15.13 (384) 15.38 (391) 15.38 (391) 16.38 (416) 16.88 (429) 18.50 (470) 18.50 (470) 18.26 (464) 19.13 (486) 7.00 (178) 7.00 (178) 7.00 (178) 7.63 (194) 7.63 (194) 8.25 (210) 8.25 (210) 8.25 (210) 8.25 (210) 11.63 (295) 9.75 (248) 9.75 (248) 9.75 (248) 9.75 (248) 10.75 (273) 11.75 (298) 11.75 (298) 12.25 (311) 11.75 (298) 13.13 (334) 14.75 (375) 14.75 (375) 14.75 (375) 14.69 (373) 17.50 (445) 17.50 (445) 17.50 (445) 17.50 (445) 21.00 (533) 21.00 (533) 21.00 (533) 21.00 (533) 6.00 (152) 6.50 (165) 6.50 (165) 8.50 (216) 8.50 (216) 7.50 (191) 8.25 (210) 8.25 (210) 9.50 (241) 10.50 (267) 9.00 (229) 10.00 (254) 10.75 (273) 11.50 (292) 12.25 (311) 11.00 (279) 12.50 (318) 14.00 (356) 15.00 (381) 15.50(394) 13,.50 (343) 17.50 (445) 16.50 (419) 18.50 (470) 16.00 (406) 17.50 (445) 20.00 (508) 21.50 (546) 19.00 (483) 20.50 (521) 22.00 (559) 24.00 (610) * Length exceeds dimensions given in API 6D/ISO 14313. 3 MATERIALS OF CONSTRUCTION US Standard Trim 10 “X” “X” Components Canada Stainless Steel Standard Trim 20 Trim 12 “X” “X” “X” “X” Full Stainless Metal-to-Metal Stellite Facing Trim 30 Trim 40 Seat/Piston “X” “X” “X” “X” Trim 50 “X” “X” ™ Body A216-WCC A352-LCC A216-WCC A351-CF8M A216-WCC A216-WCC Cover ASTM A515 Gr. 70 ASTM A516 Gr. 70 ASTM A515 Gr. 70 A240-316 ASTM A515 Gr. 70 ASTM A515 Gr. 70 Cover Seal See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 See Note 1 A193 Gr. B7 A194 Gr. 2H A320 Gr. L7M A194 Gr. 7M A193 Gr. B7 A194 Gr. 2H A193 Gr. B7M A194 Gr. 8M A193 Gr. B7 A194 Gr. 2H A193 Gr. B7 A194 Gr. 2H Liner A29-1018 ENP A29-1018 ENP A29-1018 ENP A29-1018 ENP A29-1018 ENP A29-1018 ENP Piston 410 SS 410 SS 410 SS 410 SS 410 SS 410 SS w/Stellite #6 Hard Face Piston Seal See Note 1 See Note 1 See Note 1 See Note 1 n/a See Note 1 Seat Integral A216-WCC A352-LCC n/a A351-CF8M n/a n/a Seat Renewable Carbon Steel Carbon Steel 316 SS 316 SS Carbon Steel 410 SS w/Stellite #6 Hard Face Piston Rings Cast Iron Cast Iron Cast Iron Cast Iron ENP Cast Iron Cast Iron Piston Spring Alloy X-750 Alloy X-750 Alloy X-750 Alloy X-750 Alloy X-750 Alloy X-750 Bolting Notes: 1. In the trim number description, “X” “X” relates to the cover and piston seal material options. When ordering, replace the first “X” with the cover seal from the list below. Use the second “X” only when the piston seal is different from the cover seal (i.e., VM for FKM (Viton ) cover seal and metal-to-metal piston seal). ® B = Buna-N FKM (Viton) V = Other seal material options are available upon request. 2. N/A = Not available T = Teflon M = Metal-to-metal* 3. ENP = Electroless nickel plated H = HSN 4. EHC = Engineered hard chrome plating Fiber gasket F = A = 4 ® 5. Materials comply with NACE MR0175/ISO 15156 AFLAS * Not available in fig. 75 or 76 6. Other materials are available upon request PRESSURE-LOSS CURVES/FLOW COEFFICIENTS DIFFERENTIAL PRESSURE (psi) Pressure-loss Curves FLOW RATE (gal/min. of water) Dotted lines represent pressure loss for valves without springs. Flow Coefficients Flow Coefficients (CV) Full Open Valves Liquid (incompressible flow) Valve Size CV 2 46 3 104 4 212 6 477 8 848 10 1325 12 1908 Gas (compressible flow) Q GT 963 P -P Q = CV 963 P -P CV = CV = Q G rP Q = CV rP rP = G [ ] Q CV 2 G Where: Q = FLOW: LIQUIDS – gal/min GASES – cf/hour CV = FLOW COEFFICIENT P1 = INLET PRESSURE (psia) P2 = OUTLET PRESSURE (psia) 2 2 rP = PRESSURE DROP (P1 – P2) T = ABSOLUTE TEMPERATURE (° F + 460) 2 2 G = SPECIFIC GRAVITY (WATER = 1) 2 1 2 1 The equations listed below are the basis for the above nomogram. The nomogram is a method for solving the equations below quickly and simply when service fluid is water. GT 5 3250 Briarpark Drive, Suite 300 Houston, TX 77042 USA Toll Free 1.800.323.9160 Learn more about TOM WHEATLEY piston check valves at: www.c-a-m.com/TOMWHEATLEY TOMWHEATLEY@c-a-m.com ENVIRONME N XCELLEN LE CE TA TH SAFETY AL A HE ND CA HSE Policy Statement At Cameron, we are committed ethically, financially and personally to a working environment where no one gets hurt and nothing gets harmed. MERON ©2014 Cameron | T OM WHEATLEY is a registered trademark of Cameron. Stellite is a trademark of Deloro Stellite Company, Inc. Teflon and Viton are registered trademarks of E.I. DuPont De Nemours & Company | SWP 1.5M 3/14 AD00298V
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