Hydraulic Components and Systems

1 Hydraulic Componentsand SystemsHydraulic Componentsand SystemsGENERAL INFORMATIONE uropean SalesDynex/Rivett C5 Steel Close, Little End Road,Eaton Socon, Huntingdon,Cambs. PE19 8TT United KingdomTel: +44 (0) 1480 213980 FAX: +44 (0) 1480 405662E-mail: HeadquartersDynex/Rivett Capitol DrivePewaukee, WI 53072 Tel: (262) 691- 2222 FAX: 262-691- 0312E-mail: Units & SystemsDynex/Rivett Nickerson RoadAshland, MA 01721 Tel: (508) 881- 5110 FAX: 508-881-6849E-mail: NOTES: Maximum pressures indicated throughout are the maximum intermittent pressures a component cansustain for occasional, short periods of operation without appreciably reducing the life the Dynex sales department for a review of any application which requires operating abovethe rated pressures, flows, speeds or higher than normal operating shown were in effect when printed.

2 Since errors or omissions are possible, contactyour sales representative for the most current specifications before ordering. Dynex reserves theright to discontinue products or change designs at any time without incurring any more informationvisit our web manufactures Hydraulic Components and Systems which operate underdifficult conditions including high pressure, contamination, dirty environments,fluids with low lubricity, extreme temperature variations and long duty cycles. High flow piston pumps and control valves operate with extended life atpressures from 6000 to 20 000 psi (420 to 1380 bar).The company s history dates to 1884. The two divisions, Dynex and Rivett, werereorganized as Dynex/Rivett Inc. in 1977. Today, customers use high-performanceDynex products for stronger, more efficient and reliable designs for machinesthat can be used with confidence around the world, without concern for are committed to responding to customers special requirements.

3 Our flexibleproduct design and manufacturing can shorten new-product development time,as well as support regular production ProductsUsed With ConfidenceThroughout the WorldCHECKBALL PUMPSSUCTIONCOMPRESSIONDISCHARGE3 Long Life in Demanding ApplicationsAt Pressures to 20 000 psi (1380 bar)EFFICIENT HIGH PRESSURE OPERATIONHigh flow checkball pumps operate reliably at pressures from 6000 to 20 000 psi (420 to 1380 bar). The positive seating action of the individual pistoncheck valves provides better wear and greater volumetric efficiency, especiallyat higher pressures. The check valves take the place of a valveplate, commonly used in other pumpdesigns to direct flow from the pump inlet to the outlet. With no dynamic metal-to-metal surface, checkball pumps are resistant to wear or scoring, providing anadvantage with lower lubricity and contaminated operation the checkball rotates, providing a uniform, moving area ofwear against the seat.

4 The result is high efficiency even as the checkball TOLERANT FOR DIRTY ENVIRONMENTSThe checkball design is exceptionally contamination tolerant because the outletcheck valves provide a relatively large flushing path for any systemcontamination. This makes the pumps ideal for Systems where the fluid cannotbe totally cleaned by filtration, or where complete filtration is just not OPERATION WITH A WIDE RANGE OF FLUIDSC heckball pumps are compatible with standard petroleum-based fluids, lubefluids and low-lubricity fluids including water-glycol, Skydrol, other phosphateester fluids and various aerospace fluids. This makes these pumps ideal for useon subsea production control Systems , metal processing equipment,development or production test-stands, aircraft ground-support equipment andother applications requiring special TO DAMAGE FROM CAVITATIONThis design is also resistant to cavitation damage, because the outlet checkvalves do not unseat until pressure in the pumping chambers rises to loadpressure.

5 Cavitation is caused by the implosion of fluid filling any vapor bubblesin the pumping chambers. This can occur in other pump designs when fluidunder low pressure is suddenly subjected to the higher pressure of the PUMP OUTPUT REDUCES INVENTORYF ixed displacement and Hydraulic variable delivery models are direction of output flow is constant, regardless of drive shaft rotation. Bi-directional output can be an advantage when using double-ended electricmotors, requiring only one model to be stocked and reducing installation powered by a diesel engine, a reversal in direction will not affect pumpoutput AND QUIET OPERATIONC heckball pumps provide smooth flow. Output with reduced pressure fluctuationsresults from combining the individual piston outputs in the pump cover or have indicated a typical peak to peak pressure ripple as low as 100 psioperating at 8000 psi ( 7 bar at 560 bar) for PV4000 Series pumps may be quieter than other pump designs, especially at highspeeds and pressures.

6 Tests on some models have shown readings as low as63 dBA. The sound generated is typically a more comfortable, lower pitchcompared to other compression, the inlet checkball (insidethe piston) seats. Pressure in the pumpingchamber rises until it exceeds load outlet checkball then lifts off its seat andfluid is pumped out of the outlet checkball valves provide a largeflushing path for any system operation the checkball rotates,providing a uniform, moving area of wearagainst the seat. High volumetric efficiency ismaintained even as the checkball DISPLACEMENT PUMPS4 Selecting Standard Pressure PumpsFor Operation to 8000 psi (560 bar) OUTPUT FLOWS FROM TO GPM (2,6 TO 198,7 L/MIN)Standard pressure models are available with outputs from to gpm(2,6 to 198,7 L/min) at 1800 rpm, with maximum pressures to 6000 psi (420bar) continuous and 8000 psi (560 bar) table lists most commonly used models with keyed shafts.

7 PF4000 Seriespumps with 10 or 20 design/modification numbers require detailed modelcodes specifying shaft and seal options. Contact a Dynex sales representativefor complete ordering information including spline shaft options, dimensions andperformance fixed displacement pumps are bi-rotational, providing constant direction offlow regardless of drive shaft , , , , , ,93000210400028022002800No. 12 No. 8 , , , , , , , ,05000350600042020002400No. 16 8 , , , , , ,16000420800056020002400No. 12 No. 10 , , , , , ,15000350600042020002400No. 20 12 , , , ,63000210500035020002400PF4011-20 , ,26000420800056026003600PF4015-20 , ,66000420800056026003600No. 24 No. 12 PF4021-20 , ,83000210500035026003600PF4018-10 , ,14000280600042020002400PF4026-10 , ,54000280600042020002400No.

8 24 12 , , , , , ,860004206000420180023002-1/2 inch Flange 1 inch Flange ,75500380600042018002200 Output flow based on typical performance at rated pressure with pressurized inlet where required. Refer to Bulletin PES. These models are also available with ports: Models PF2006-1807 and PF2008-1802 (Inlet, 3/4 inch ; Outlet, 1/2 inch ). These models are available with various shaft and seal options. Contact a Dynex sales representative for complete model code. These models are also available with ports: Models PF4015-P-10 and PF4021-P-10 (Inlet 1-1/4 inch ; Outlet 3/4 inch ). Pattern for standard 4-bolt flange. STANDARD PRESSURE FlowAt 1500 rpm Output FlowAt 1800 rpm RatedSpeedrpmRatedPressureMaximumSpeedrp mInletPort SizesOutletMaximum Intermittent PressureFIXED DISPLACEMENT PUMPS5 Selecting High Pressure Models ForOperation to 20 000 psi (1380 bar) OUTPUT FLOWS FROM TO GPM (0,83 TO 120,4 L/MIN)The table lists the most commonly used models with keyed shafts.

9 PF500,PF4000 and PF4200 Series pumps with 10 or 20 design/modificationnumbers require detailed model codes specifying shaft and seal a Dynex sales representative for complete ordering informationincluding spline shaft options, dimensions and performance shown in the table, high pressure outlet ports are recommended whenoperating above 8000 psi (560 bar).All fixed displacement pumps are bi-rotational, providing constant direction offlow regardless of drive shaft , ,833/8 Medium PressurePF504H-10 , ,32800056010 00070018002800 No. 12 and Threaded PF507H-10 , ,82or G 1/4 ( ) PF510H-10 , , ,3500035010 00070018002800No. 12 Medium Pressure Coned and Threaded , ,3500035010 00070018002800No. 12 G 3/8 ( ) , ,5600042010 00070018002800No. 16 Medium PressureConed and Threaded , ,5600042010 00070018002800No.

10 16 1/2 ( ) PF4011H-A-20 , ,110 00070010 00070018001800No. 24 Medium PressurePF4015H-A-20 , ,810 00070010 00070018001800 Coned and Threaded PF4011H-B-20 , ,110 00070010 00070018001800No. 24 3/4 ( ) PF4015H-B-20 , ,810 00070010 00070018001800PF4203H-10 , ,515 000104020 000138018001800PF4205H-10 , ,915 000104020 0001380180018009/16 Medium PressurePF4208H-10 , ,312 00083017 000117018001800No. 24 and Threaded PF4209H-10 , ,512 00083017 000117018001800PF4210H-10 , ,410 00070015 , ,715 000104015 0001040180018002-1/2 inch Flange Outlet Block Required , ,110 00070010 000700180018002-1/2 inch Flange Outlet Block Required , ,480005608000560180018002-1/2 inch Flange Outlet Block Required Output flow based on typical performance at rated pressure with pressurized inlet where required. Refer to Bulletin PES.