TOM WHEATLEYTM Piston Check Valves

1 TOM WHEATLEYTMTOM WHEATLEY Piston Check ValvesVALVES & MEASUREMENTVALVES & MEASUREMENTTABLE OF CONTENTSPISTON Check VALVEF eatures 1 Installation & Operation 2 How to Order 2 Assembly & Disassembly3 Dimensions Raised Face Flanged End4 Dimensions Ring Joint Flanged End5 Standard Materials of Construction6 Pressure Loss Curves & Flow Coefficients7 TRADEMARK INFORMATION8CT-TOM-PCV01/08 NP-5M TOM WHEATLEYCT-TOM-PCV01/08 NP-5M1 Piston Check VALVES2 in. (50 mm) THROUGH 12 in. (300 mm) ASME CLASS 150 - 2500 When pressure surges and pulsations are prevalent in a flow system, TOM WHEATLEY Piston Check Valves are an efficient solution to system 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.

2 In addition, the TOM WHEATLEY Piston Check Valve Top Entry Design allows for easy access and replacement of all valve internals with minimal , Reliable Prevention of BackflowIn 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 Check Valve floats within a cylinder. Should the flow cease, the Piston lowers and seats to create a bubble-tight prevention of ball Check mechanism and an adjacent orifice withinthe Piston extend valve life by dampening Piston movement and eliminating slamming or chattering in the event of sudden pressure surges or erratic flow conditions.

3 The orifice size affects the degree of Piston movement and is optimally selected at the factory to meet the requirements of a specified flow 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 a result of the Piston and seat design the greater the back pressure acting on the Piston the tighter the WHEATLEY Piston Check Valves complies with API 6D (ISO 14313) and is available in the sizes and pressure classes listed TOM WHEATLEY Piston Check Valves are designed for horizontal WHEATLEY Piston Check Valves must be specifically ordered for vertical flow up when intended for that request, TOM WHEATLEY Valve is prepared to design other sizes and pressure classes of Piston Check WHEATLEY manufactures a full line of Swing Check and Wafer Check access to allvalve internalsthrough Check Valveinside Piston allowsquick or removableseat designs overlaysare also providespositive controls closingspeed of Piston .

4 Dampening pistonresponse to changesin greater the backflow pressure, thetighter the in RF or RTJ End Connections. TOM WHEATLEYVALVES & MEASUREMENT2 Piston Check VALVES2 in. (50 mm) THROUGH 12 in. (300 mm) ASME CLASS 150 - 2500CT-TOM-PCV01/08 NP-5M TOM WHEATLEYSECTIONAL VIEW OF ASSEMBLED Piston Check VALVEO perating temperatures should not exceed 300 F (149 C) continuous or 350 F (177 C) intermittently. Specify when ordering if operating temperatures exceed the WHEATLEY minimum maintenance due to simplicity of design and rugged construction. Recommended spare parts kit consists of Piston Seal, Piston Rings, Springs and Cover Seal.

5 Piston Check Valves require INSTALLATION/OPERATIONR emove shipping protectors from End Connections. Check interior of the valve through each end for foreign objects and/ or shipping TOM WHEATLEY Piston Check Valves are designed for horizontal service. TOM WHEATLEY Piston Check Valves must be specifically ordered for vertical flow when intended for that SERVICETOM WHEATLEY Piston Check Valves should be installed with inlet and outlet at the same level and the bonnet/cover facing upward for proper action. TOM WHEATLEY Piston Check Valves must be installed with the arrow on the body pointing in the direction of intended flow.

6 Horizontal flow is the preferred orientation for the TOM WHEATLEY Piston Check TO ORDERVALVE SIZEASMEEND CONNECTION/TRIM(inches)PRESSURE CLASSSEATCODEORDERING DATA02067510B02=2 03=3 04=4 06=6 08=8 10=10 12=12 01 =ASME15003 =ASME30006 =ASME60009 =ASME90015 =ASME150025 =ASME250073 =RF- Renewable Seat74 =RTJ- Renewable Seat75 =RF- Integral Seat76 =RTJ- Integral SeatMaterials CodeREPRESENTS2 ASME 600RF WITH INTEGRAL SEAT10 BMaterials Code - See Standard Materials of ConstructionsThe Alpha Character Represents the Seal Material Code BodyASTM A216 Gr. WCCC overASTM A36 Cover SealFiber GasketBoltingASTM A193 Gr.

7 B7, ASTM A194 Gr. 2 HLinerASTM A29-1018 with ENPP iston410 Stainless SteelPiston SealBuna-NSeatIntegralPiston RingsCast IronNote: Other materials of construction and seals available upon FLOWThe TOM WHEATLEY Piston Check Valvearrow pointing in the direction of intended flow. User must specify, when ordering if the valve is intended for vertical the End Connections and Mating Pipe thoroughly prior to assembly. Proper support of the valve and/or pipe should be provided to eliminate strain on End in excess of the working pressure should not be applied to the closed Piston .

8 All Valves have been hydrostatically tested to 1 1/2 times the rated working pressure. is installed with the Valves & MEASUREMENTCT-TOM-PCV01/08 NP-5M3 Piston Check VALVES2 in. (50 mm) THROUGH 12 in. (300 mm) ASME CLASS 150 - 2500 the Piston and liner assembly out of body (use eye hole in center of Piston if necessary). Remove Piston from liner and remove Check valve and orifice(s) from seals and sealing surface for foreign material, nicks and/or body seat face for wear or any parts showing signs of damage, excess wear or in reverse & RETAINER SCREWBLEEDER PLUGNUTSTUDCOVERCOVER SEALSPRINGBODYLINERPISTON SEALPISTONPISTON RINGCHECK VALVE TOM WHEATLEYVALVES & MEASUREMENT4 Piston Check VALVES2 in.

9 (50 mm) THROUGH 12 in. (300 mm) ASME CLASS 150 - 2500 RAISED FACE FLANGED END, FIGURE NUMBERS 73 AND 75 NOMINAL SIZE in. (mm) ASME CLASSABCD150 (267)* (134) (165) (178) (267) (134) (165) (178) (292) (146) (171) (178)2 (50) (368) (184) (178) (178) (368) (184) (184) (178) (451) (226) (191) (203)150 (318)* (159) (203) (210) (318) (159) (203) (210) (356) (178) (210) (210)3 (80) (381) (191) (216) (210) (470) (235) (292) (295) (578) (289) (318) (295)150 (356)* (178) (286) (248) (356) (178) (286) (248) (432) (216) (292) (248)4 (100) (457) (229) (302) (248) (546) (273) (337) (273) (673) (337) (381) (273)150 (445)* (223) (410)

10 (298) (445) (223) (410) (298) (559) (280) (416) (298)6 (150) (610) (305) (425) (298) (705) (353) (483) (334) (914) (457) (483) (334) (495) (248) (425) (368) (533) (267) (425) (368)8 (200) (660) (330) (425) (368) (737) (368) (425) (368) (622) (311) (470) (432) (622) (311) (470) (432)10 (250) (787) (394) (470) (432) (838) (419) (470) (432) (699) (349) (572) (610) (711) (356) (572) (610)12 (300) (838) (419) (572) (610) (965) (483) (572) (610)DIMENSIONSABCSIZEDREMOVABLESEAT DETAILFIGURE 73CT-TOM-PCV01/08 NP-5M TOM WHEATLEY* Length exceeds dimensions given in API 6D/ISO & MEASUREMENTCT-TOM-PCV01/08 NP-5M5 Piston Check VALVES2 in.