PPV PISTON VALVE DESCRIPTION: The Pennant Piston Valve (PPV) is a linear movement valve in which a stainless steel piston travels between the upper and lower seal ring. These rings are separated by a lantern bushing, which supports the piston and creates a bubble tight seal. When the valve is in the open position, the upper seal ring in conjunction with the piston prevents leakage through the stem. In the closed position, the lower seal ring seals the valve - passage and provides a tight shutoff. Known for their extraordinary performance and long life, Piston Valves can handle a variety of media such as steam, thermal fluid, condensate and many other liquids and gasses. They can be used in on/off and throttling applications. Bubble tight (ANSI leakage class VI) shutoff Can be used for throttling applications Robust and maintenance free Long service life Effective sealing area is large, as compared to the conventional linear movement valves Compensates for thermal expansions with reinforced Grafoil sealing rings and Belleville washers Can be easily serviced inline Easy to repair: The only wearing parts are sealing rings which are easily replaceable Low cost of ownership (Cost of ownership includes maintenance, inventory cost in addition to the purchase cost) SIZES AND CONNECTIONS: MOC & END CONNECTION * Forged #800 (Screwed/Socket weld) Cast # 300 (Screwed/Socket weld) Cast #150 (FLANGED ENDS) Cast #300 (FLANGED ENDS) Cast PN40 (FLANGED ENDS) * Forged #800: ½”, ¾”, 1” – Angle pattern; 1”, 1½” – Straight pattern. Welded-on flanged connections available. Socket weld ends – as per ASME B16.11 Integral flanged ends - as per ASME B16.5 (#150, #300) - as per BS EN1092–1 PN40 INSTALLATION: The valve should be installed in the direction of flow indicated on the body. The valve can be installed in any plane, provided it is accessible for operation. MAINTENANCE: In case any leakage is observed the bonnet nuts should be tightened with the valve in the fully closed position. Tightening the bonnet nuts may be repeated as and when required until the rings are worn out and no further adjustment or tightening is possible. At this stage the sealing rings need to be replaced. 6 No undue force should be used when tightening the nuts, as they should rotate easily with a standard spanner. Care should be taken while tightening the nuts to avoid tilting of the bonnet. Undue force should not be used to shut the valve as this may damage the spindle or the wheel. IMPORTANT: Always use the recommended tightening torque. Avoid excessive tightening, as this may reduce the life of the sealing rings. Care should be taken while removing the old sealing rings for replacement.
Open the catalog to page 1LIMITING CONDITIONS: Forged Cast - Screwed/SW Cast - Integral/ Flange #150 Cast - Integral/ Flange #300 Cast - Integral/ Flange #PN40 Hydrostatic Shell Test Seat Leakage Test Body design rating PMA - Max. permissible pressure PMO - Max. permissible operating pressure Body design rating #300 as per ASME B16.34 PMA - Max. permissible pressure 725 psig @ 100 °F PMO - Max. permissible operating pressure 398 psig @ 800 °F Body design rating #150 as per ASME B16.34 PMA - Max. permissible pressure 285 psig @ 100 °F PMO - Max. permissible operating pressure 78 psig @ 800 °F Body design rating #300 as...
Open the catalog to page 2DIMENSION TABLE: SIZE ½" ¾" 1" 1½" CAST CONSTRUCTION - INTEGRAL FLGD.: LANTERN BUSH LOWER VALVE RING GRAFOIL WITH SS UPPER VALVE RING REINFORCEMENT BELLEVILLE WASHER CAST IRON DIMENSION TABLE: Piston Valve - Integral Flgd Cast Construction SIZE ½" ¾" 1" 1½" 2" 3" 4" 6" 8
Open the catalog to page 3BALANCED VALVE (2½” ~ 8”): For higher size piston valves - NPS. 2½”, 3”, 4”, 6”, 8”, higher torques will be required to operate (close/open) an unbalanced valve against inlet pressure. Balanced piston valves overcome this higher torque requirement, by balancing the pressure above and below the piston. BODY BONNET HANDWHEEL ASTM A216 Gr. WCB ASTM A216 Gr. WCB CAST IRON AISI 316/ ASTM A351 Gr. CF8M AISI 316 AISI 410 BRASS CAST IRON/AISI 304 PISTON SHAFT SPINDLE SPLIT NUT LANTERN BUSH LOWER VALVE RING UPPER VALVE RING GRAFOIL WITH SS BONNET VALVE RING REINFORCEMENT GLAND VALVE RING GLAND COVER ASTM...
Open the catalog to page 4HOW TO ORDER: Example: PPV/FCS/1/2"/SW, Where Product Code Sizes Available End Connections SW: Socket Weld NPT: SCR NPT FCS : FORGED CARBON STEEL (ASTM A105) BSP:SCR BSP BSPT:SCR BSPT Welded Flange SW: Socket Weld PPV CAST (SW/SCR): ½”, ¾”, 1” CCS : CAST CARBON STEEL (ASTM A 216 Gr. WCB) NPT: SCR NPT BSP:SCR BSP BSPT:SCR BSPT F1: Flanged End #150 F3: Flanged End #300 PN40: Flanged End PN40 ORDERING INFORMATION: 1. Service Fluid 2. Maximum Operating Pressure 3. Maximum Operating Temperature 4. Size 5. End Connections
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