1. PVWH Pump Presentation

2. PVWH Pumps n 10 Displacements –. 66 in³/rev –.86 in³/rev –1.35 in³/rev –1.55 in³/rev –2.06 in³/rev –2,83 in³/rev –3,88 in³/rev –4.67 in³/re –6.00 in³/rev –7.94 in³/rev n 3 Frame Sizes –SAE “A” 2-bolt –SAE “B” 2-bolt –SAE “C” 2-bolt

3. PVWH Pumps n Continuous Operating Pressures from 1500 psi to 5000 psi. n 11 Different Control Options –Simple Hn (Handwheel) to V-M Servo Control. n Operating Speeds from 600 rpm to 3000 rpm. –Higher speeds are available, please consult with your local Area Manager.

4. PVWH Features & Benefits n Large Selection of Controls. n Cylinder Barrel Supported by a Hydrodynamic Bearing. –Allows operation on special fluids. –Provides for an infinite bearing life. –Provides a compact design. n SAE Straight Keyed or Splined Shafts. –Splines available in Mobil (S) and Industrial Class 5 (K) fits. –Belt Driven Shafts available on SAE “A” and “B” frame sizes. n Keyed (B) and splined (C).

5. PVWH Features & Benefits n Large Sealed Front Shaft Bearing. –Allows for operation on special fluids. –Allows for side loads. (belt driving). n “A” Frame500 lbs. n “B” Frame750 lbs. n “C” Frame 1000 lbs. n Special Polymerous Saddle Bearings. –Allows operation on special fluids. –Permits constant control reaction. –Eliminates troublesome trunion bearings. –Provides long life.

6. PVWH Features & Benefits n Steel Pistons with Specially Treated Faces. –Increased fluid retention. –Higher pressure operation with longer life. –High degree of contamination resistance. (ISO 21/19/16) –Allows for operation on special fluids. n Patented Pressure Lubricated Swashblock. –Provides constant lubrication to saddle bearings for high pressure high cycling applications.

7. PVWH Features & Benefits n Hard-on-Hard Running Surfaces. –All running surfaces hardened to a Rockwell “C” of 60-65. –Provides greater resistance to contamination –Longer life. –Allows operation on fluids that would attack softer materials such as bronze. n Quiet Design Valve Plate (Standard). –Noise levels below 80 dBA.* –* Data taken with single microphone 3 ft. form the pump in a semi-reverberant room. n Optional Thru-shaft Valve Plates. –Allows for multiple pump combinations.

8. PVWH Specifications

9. PVWH Cutaway Side View Shaft Sealed Shaft Bearing Shaft Seal Pressure Lubricated Swashblock Saddle Saddle Bearings Hydrodynamic Bearing Shoe Retainer & Fulcrum Ball Piston & Shoe Assembly Hardened Cylinder Barrel Hardened Valve Plate

10. PVWH Cutaway Top View

11. PVWH Do’s and Don’ts n Do’s –Fill Case Prior to Start-up –Check Alignment n.005 Total Indicator Runout –Check Rotation –Connect Case Drain Directly to Reservoir (separately and full sized) –Back Off Pressure Adjustments (pump and relief valve) –Use Fast Acting Relief Valve n Don’ts –Restrict Case Drain Line –No Filter –No Heat Exchanger –No Other Connections –No suction filter or strainer

12. Don’ts Effects n Back Pressure on Pump Case –Can cause the piston shoes to liftoff from the swashblock n maximum case differential pressure of 10 psi –Shoe liftoff will roll the piston shoe edges, cold work the ball socket area of the shoe, and cause the shoe skirt to fail. n Result, a lot of small useless pieces in the front end of the pump. Definitely not a warranted failure. –Can cause break through of the hardening on the swashblock, causing wear on the swashblock and contaminating the system with fine iron particles and eventual failure of the swashblock and piston shoes. –Can cause the shaft seal to leak n 25 psi maximum seal pressure

13. Don’ts Effects n Improper Alignment –Can cause pump not to build pressure, and creates abnormal wear on the hydrodynamic bearing, and valve plate & cylinder barrel faces –Can cause the shaft seal to leak n Suction Filters and Strainers –Can cause cavitation, this is especially true as temperature changes and fluid viscosity increases n A definite No NO when running on fluids with high specific gravities Implosion of the air bubble caused by cavitation can generate temperatures in excess of 2300 ° F, resulting in burnt oil, and pitted valve plates & cylinder barrels Implosion of the air bubble caused by cavitation can generate temperatures in excess of 2300 ° F, resulting in burnt oil, and pitted valve plates & cylinder barrels

14. PVWH Controls n Pressure Controls –CN Pressure Comp. –CL Low Pressure Comp. –C2 Dual Pressure Comp. –CU Soft Start –HP Horsepower Limiting –HF Horsepower Limiting w/ Load Sensing –ER Electronic Proportional Pressure Compensator n Volume Controls –CF Load Sensing –CH High/Low –MN Pintle Control –MS Pintle Control w/ Neutral By-Pass –HN Hand Wheel –V-M Servo Control n Incorporates Moog Servo Valve

15. PVWH Controls n Options –VSR Remote Pump Compensator –VRS Pump Mounted Relief Valve –Minimum Volume Stop –Maximum Volume Stop

16. CN & CL Control

17. Pressure Adjusting ScrewPressure Comp. Assembly Compensator Spring & Spool Control SpringControl Piston Control Orifice (10-24 x.250)

18. CN & CL Control Compensated

19. CN & CL Control Diagram

20. CU Soft Start Control

21. CU Soft Start - NC Control Spring Control Piston Pressure Adjustment Compensator Adjustment Assembly Compensator Spring Compensator Spool Unloading Valve Control Orifice

22. CU Control - Unloading Note: When the solenoid is energized, pressure by-passes the compensator spool,

23. CU Control Diagram

24. CF Control

25. Load Sense Module Load Sense Spool Load Sense Spring Shims Load Sense Spring + Shims =Delta P Control Spring = Stand-By Pressure

26. CF Control Metered

27. CF Control Diagram

28. C2 Dual Pressure Compensator

29. C2 Dual Pressure Compensator Diagram

30. ER Proportional Pressure Compensator

31. ER Control Diagram

32. HP Limiter

33. HP Springs HP Stop Bar HP Spool HP Control Piston

34. HP Limiter Spool

35. HP Limiter Curves

36. CH Hi-LO Compensator

37. CH Hi-Lo Compensator Minimum Volume StopControl Piston Break Point Adjustment Compensator Spool

38. CH Hi-LO Compensated When using a minimum volume stop, a relief valve MUST be used!

39. HN Hand Wheel Control

41. MN / MS Pintle Control

43. VV Electronic Servo Control