pvk pumps. pvk pump features controls are easily field convertible. by using pilot control modules...
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P Control Module Load Sense Module Load Sense Connector Module Visual Stroke IndicatorTRANSCRIPT
PVK Pumps
PVK Pump Features
• Controls are Easily Field Convertible.– By using pilot control modules (PCM’s) for
various control functions.
P Control Module
Load Sense Module
Load Sense Connector Module
Visual Stroke Indicator
PVK Pump Features
• Hydrodynamic Cylinder Barrel Bearing– Allows for a more compact design
PVK Pump Features
• Hydrodynamic Cylinder Barrel Bearing– Allows for a more compact design– Enables operation on low viscosity or special
fluids.
PVK Pump Features
• Hydrodynamic Cylinder Barrel Bearing– Allows for a more compact design– Enables operation on low viscosity or special
fluids.– Provides infinite bearing life
PVK Pump Features
• Hydrodynamic Cylinder Barrel Bearing– Allows for a more compact design– Enables operation on low viscosity or special
fluids.– Provides infinite bearing life– Permits the pump to operate continuously at
high pressure, without degradation of the bearings.
Hydrodynamic Bearing
PVK Pump Features
• Outboard Driveshaft Bearing Design– Pre-lubricated
PVK Pump Features
• Outboard Driveshaft Bearing Design– Pre-lubricated– Oversized
PVK Pump Features
• Outboard Driveshaft Bearing Design– Pre-lubricated– Oversized– Allows the pump to operate on special and low
viscosity fluids.
PVK Pump Features
• Outboard Driveshaft Bearing Design– Pre-lubricated– Oversized– Allows the pump to operate on special and low
viscosity fluids.– Allows the pump to operate continuously at
high pressure.
Pre-lubricated, oversized driveshaft bearing
PVK Pump Features
• Swashblock and Saddle Design– Eliminates troublesome yolk bearings
PVK Pump Features
PVK Pump Features
Saddle & Bearings
Saddle Bearings & Saddle
PVK Pump Features
• Swashblock and Saddle Design– Eliminates troublesome yolk bearings– Increased Bearing Area vs Needle or Roller
Bearings.
PVK Pump Features
• Swashblock and Saddle Design– Eliminates troublesome yolk bearings– Increased Bearing Area vs Needle or Roller
Bearings.• Pressure Lubricated Swashblock
• More consistent control response
PVK Pump Features
Pressure Lube Galleries
PVK Pump Features
• Swashblock and Saddle Design– Eliminates troublesome yolk bearings– Increased Bearing Area vs Needle or Roller
Bearings.• Pressure Lubricated Swashblock
• More consistent control response• Allows for operation on special and low viscosity
fluids.
PVK Features
• Optional Minimum and Maximum Volume Stops– Allows the customer to tailor pump flows to his
exact needs.
Optional Minimum Volume Stop Standard Maximum Volume Stop
PVK Features
• Caution: When using a minimum volume stop a full flow high pressure relief valve must be used.
PVK Pump Features
• Quiet Valve Plate & Port Plate– Minimizes noise at typical electric motor
speeds.
PVK-140 Quiet Valve Plate
PVK 270/370 Quiet Port Plate
PVK Pump Features
• Quiet Valve Plate– Minimizes noise at typical electric motor
speeds.• This is accomplished by porting the trapped high
pressure oil in the cylinder barrel, through the de-compression orifice, into the pump case
De-compressed oil is bled into the pump case instead of the inlet port.
Port Plate for PVK-270
De-compression orifice
Port Plate for PVK-270
De-compression exhaust
PVK Pump Features
• Quiet Valve Plate– Minimizes noise at typical electric motor
speeds.• This is accomplished by porting the trapped high
pressure oil in the cylinder barrel, through the de-compression orifice, into the pump case.
• Compression Slot slowly compresses the oil in the pumping piston chamber, before being fully connected to the outlet port.
Compression Slot
Inlet Port
De-compression V slot
The Competition
• What happens to oil when it ported through a flow control?
• What happens to oil when it ported through a flow control?– 1. A pressure drop is created.
• What happens to oil when it ported through a flow control?– 1. A pressure drop is created.
• Creating heat.
• What happens to oil when it ported through a flow control?– 1. A pressure drop is created.
• Creating heat.– 2. Fluid is accelerated.
• What happens to oil when it ported through a flow control?– 1. A pressure drop is created.
• Creating heat.– 2. Fluid is accelerated.
• Creating turbulent flow.
• Where is this hot, turbulent going?
• Where is this hot, turbulent going?
–Back into the rotating group!
Inlet Port
De-compression V slot
PVK Pump Features
• Thru-Shaft (standard)– 100% thru-shaft torque capability
PVK Pump Features
• Thru-Shaft (standard)– 50% thru-shaft torque capability*
• Enables multiple pump installations from one drive source.
• * Consult Factory for Higher Torque Capabilities
Thru-shaft
Cover Plate
PVK Pump Features
• Hard-on-Hard Running Surfaces (PVK-140)– Provides greater contamination resistance.
Hardened running surfaces
PVK-140
PVK Pump Features
• Hard-on-Hard Running Surfaces (PVK-140)– Provides greater contamination resistance.– Allows for operation on special and low
viscosity fluids.
PVK Pump Features
• Hard-on-Hard Running Surfaces– Provides greater contamination resistance.– Allows for operation on special and low
viscosity fluids.– Helps facilitate longer pump life.
PVK Pump Features
• Hard-on-Hard Running Surfaces– Provides greater contamination resistance.– Allows for operation on special and low
viscosity fluids.– Helps facilitate longer pump life.– ISO Contamination Rating of 18/15
PVK Pump Specifications
• Two Frame Sizes– SAE “D” Four-bolt Mount
PVK Pump Specifications
• Two Frame Sizes– SAE “D” Four-bolt Mount– SAE “F” Four-bolt Mount
PVK SAE 4-Bolt Mounts
6.00 7.00
PVK-140 PVK-270/370
SAE “D” SAE “F”
PVK Specifications
• A Variety of Controls to choose from
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
• P-2NN Two Pressure Compensator
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
• P-2NN Two Pressure Compensator• P-3NN Three Pressure Compensator
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
• P-2NN Two Pressure Compensator• P-3NN Three Pressure Compensator• P-C** Single Pressure w/ N.O. Soft Start
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
• P-2NN Two Pressure Compensator• P-3NN Three Pressure Compensator• P-C** Single Pressure w/ N.O. Soft Start• P-D** Two Pressure w/ N.O. Soft Start
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
• P-2NN Two Pressure Compensator• P-3NN Three Pressure Compensator• P-C** Single Pressure w/ N.O. Soft Start• P-D** Two Pressure w/ N.O. Soft Start• P-E** Three Pressure w/ N.O. Soft Start
PVK Specifications
• A Variety of Controls to choose from– P-1NN Single Pressure Compensator
• P-2NN Two Pressure Compensator• P-3NN Three Pressure Compensator• P-C** Single Pressure w/ N.O. Soft Start• P-D** Two Pressure w/ N.O. Soft Start• P-E** Three Pressure w/ N.O. Soft Start• P-RNN Remote (“P” Control off pump)
PVK Specifications
• “P” Controls cont.• P-A** N.O. Proportional Pressure Compensator
PVK Specifications
• “P” Controls cont.– P-A** N.O. Proportional Pressure Compensator– P-B** N.C. Proportional Pressure Compensator
PVK Specifications
• “P” Controls cont.– P-ANN N.O. Proportional Pressure Compensator– P-B N.C. Proportional Pressure Compensator
• Optional Control Modifiers– /F Load Sensing
PVK Specifications
• “P” Controls cont.– P-ANN N.O. Proportional Pressure Compensator– P-B N.C. Proportional Pressure Compensator
• Optional “P” Control Modifiers– /F Load Sensing– /G Horsepower Limiting w/ Load Sensing
PVK Specifications
• “P” Controls cont.– P-ANN N.O. Proportional Pressure Compensator– P-B N.C. Proportional Pressure Compensator
• Optional “P” Control Modifiers– /F Load Sensing– /G Horsepower Limiting w/ Load Sensing– /H Horsepower Limiting
PVK Specifications
• V-M Electronic Servo Control– 2 Servo Valve Sizes Available for Fast or
Slower Response.• 25 Liter Servo Valve• 50 Liter Servo Valve
PVK Specifications
• V-M Electronic Servo Control– 2 Servo Valve Sizes Available for Fast or
Slower Response.• 25 Liter Servo Valve• 50 Liter Servo Valve
– * requires a separate pilot source
– LVDT Pump Feedback• Feeds back pump position
PVK Specifications
• RU Control– Two Position Pump Control
• Two adjustable deliveries
PVK Specifications
• RU Control– Two Position Pump Control
• Two adjustable deliveries• Uses Standard CETOP 3 Pilot Valve
– * requires a separate pilot source
PVK Pump Specifications
UNIT THEORETICAL RATED MAXIMUM FLOW RATE POWER INPUTMAXIMUM CONTINUOUS PRESSURE at 1800 rpm at rated contin.
DISPLACEMENT PRESSURE rated contin. pressure
pressure and 1800 rpm
in3/rev ml/rev psi bar psi bar gpm I/min hp kw
140 8.61 141 5000 345 5800 400 63 238,7 207.2 154,6
270 16.3 267 5000 345 5800 400 120 454,8 392.3 292,8
370 22.4 367 3500 241 4250 293 162.1 614,4 389.4 290,6
PVK Pump Specifications
• Caution:– PVK 270 and 370’s are specifically balanced
for 1200 rpm or 1800 rpm. – When ordering, please specify the electric
motor drive speed.
PVK Pump Specifications
• Caution: The PVK-270/370 requires 35 psia at the inlet in order to operate at 1800 rpm.
SPECIFICATIONS PVK-140 PVK-270 PVK-370
DRIVEMaximum RPM Flooded Inlet Supercharged Inlet
Minimum RPM Flooded Inlet Supercharged Inlet
Torque to turn shaft (ft. lbs.)
18002400
600600
15
1500 1800*
600600
60
1500 1800*
600600
60
InletPressure (psia) 1800 rpm 1500 rpm 1200 rpm
13.710.08.0
35.013.010.5
35.014.011.0
PVK Viscosity & Temperature Specifications
SPECIFICATIONS PVK-140 PVK-270 PVK-370Fluid Also see “Additional Notes” For filtration & contamination levels
Viscosity SSU Minimum Maximum
802000
802000
802000
Operating Temperature (F°)* Inlet Maximum Minimum Case Range
200-20
150-250
150-20
150-200
150-20
150-200
*Minimum and maximum viscosities should be observed
PVK-140 LH Valve PlateControl Cylinder Bore
LH Valve Plate
Compression Slot
De-compression Orifice
Hardened Running Surface
PVK-140 RH Valve Plate
RH Valve Plate
PVK-140 RH & LH Valve Plates
LH - CCW RH - CW
Note: Compression slots point in the opposite direction of pump rotation.
PVK “P-1NN” Control
OP 1 OP 2
OP 3 OP 4
OP 6
OP 7
OP 14
GPA
RP1“A” Port
“B” Port
PVK Control Specifications
SPECIFICATIONS PVK-140 PVK-270 PVK-370Control Minimum Pilot Pressure (psi) Volume Control Control piston stroke (inches) Control piston areas (inches²) Pressure Controls On Stroke Off Stroke Volume Controls On & Off are equal Volume (in³) Pressure Controls On Stroke Off Stroke
5001.21
0.4052.436
2.436
0.492.95
5001.62
0.6013.693
3.693
0.975.98
5001.62
0.6013.693
3.693
0.975.98
Volume Controls On & Off are equal Swashblock angle (degrees) max. Rate (msec.) at 1800 Rpm & rated pressure* On stroke Off stroke
2.9517
10070
5.9815
11070
5.9815
11070
*Fastest possible times. When using “Pressure Controls”, stroking times may be slower….depending on conditions. Consult Oilgear Technical Sales Department.
PVK Do’s and Don’ts
• The Do’s List– Check Alignment (.005 TIR)
– Fill the pump case!– Verify shaft rotation.– Connect case drain line directly back to
tank with no restrictions, full sized and separately.
PVK Do’s and Don’ts
• The Do List– Use a fast acting spike relief valve.– Back off the compensator and relief
valve adjustments prior to initial start-up.
PVK Do’s and Don’ts
• The Don’t List or the “If it breaks, you bought it list.”
–Do not restrict the case drain line.• No filters (if one is used make sure it
is sized for peak case flows and install a 5 psi check valve in parallel.)
PVK Do’s and Don’ts
• Case Restriction cont.– No in-line (Hedland style) flow meters, they
tend to be quite restrictive, the flow path through the meter is only a ½” inch diameter hole. If using one please, install a ball valve in parallel with the meter. Keep the ball valve open when you are not monitoring case flow.
PVK Do’s and Don’ts
• Case Restrictions cont.– No heat exchangers. –What does a heat exchanger need to
operate properly?
PVK Do’s and Don’ts
• Case Restrictions cont.– No heat exchangers.
• What does a heat exchanger need to operate properly.
• Answer: Turbulent Flow or pressure drop. Turbulent flow scrubs cold oil off the tubes and mixes it with hot oil, thus creating cooler oil.
PVK Do’s and Don’ts
• Case Restriction cont.– No other return or drain lines.
• Whew, thought we’d never get through case restrictions, didn’t ya.
• Inlet– No inlet strainers or filters.
PVK Do’s and Don’ts
• Inlet cont.– Strainers and filters can cause
cavitation. This is especially true as temperature and viscosity change.
• What is cavitation?
PVK Do’s and Don’ts
• Cavitation: Creating a low enough pressure to allow gasses normally in solution, to become free state. On the inlet of a pump this “free state gas (air)”, creates a bubble. When the bubble re-compresses (on pressure side of the pump) it implodes. This implosion generates temperatures in excess of 2300º F.
The Effects of Case Restriction
• Will cause the piston shoes to lift off the swashblock.– Maximum differential pressure for a PVK pump varies depending
on rpm. It can be as high as 10 psi at 1800.
• Vickers PVH 7 psi• Rexroth AA10VSO 7 psi• Oilgear PVWH 10 psi• Oilgear PVG 60 psi @1800 rpm• Oilgear PVM 10 psi
PVK Case Differential vs Inlet Curves
The Effects of Case Restriction
30 PSI on Inlet, 0 PSI on Case
0 PSI on Inlet, 30 PSI on Case
The Start of a bad thing
PVK-140 swashblock
The Final Stage
Thank you for buying Oilgear Products