Cat. B-Edit1E

B

VANE PUMPS

Fixed Displacement

Pump TypeGraphicSymbols

125102050100200

Single Pumps

50T"PV2R" SeriesSingle Pumps

PV2R1

PV2R2 PV2R3 PV2R4(PV2R1)(PV2R2) (PV2R3)"PV2R" Series
Double Pumps

Maximum
Operating
500 1000 Pressure
MPa

Output Flow at 1200 r/min at No-Load L/min

Small Volume

150T

Large Volume (PV2R2) (PV2R3) (PV2R4)

Page

7

B-5

21

B-6

21

B-18

● The following pumps can also be supplied.
"PV2R4A" Single Pumps"PV2R24A/PV2R34A" Double Pumps
Consult Yuken for details.

Caution :In the case of Water Glycol fluid, a slight oil leak occurs from the shaft seal part.
(Criterion : 500ml / 6 months of oil leakages.)
Please install a tray appropriate capacity on the pump-base.

B-1

Hydraulic Fluids■ Type of Hydraulic Fluids
Any type of hydraulic fluids listed in the Table 1 below can be used. However, the specifications of the pumps such as maximum pressure
and maximum pump speed may be changed according to the type of hydraulic fluids to be used.
For details, please refer to the specifications of the pump concerned.
(Table 1)● Hydraulic Fluids
Type of Fluids"PV2R" Series Single Pumps"PV2R" Series Double Pumps

Single Pumps

Petroleum Base Oils

Use anti-wear type oils or R & O (Rust and Oxidation inhibitor) type oils (equivalent to ISO VG32 or 46)

Synthetic Fluids

Use phosphate ester type fluids.
When phosphate ester type fluid is used, prefix "F-" to the model number because the special seals(fluororubber) are required to be used.

Water
ContainingFluids

Consult Yuken for details.

Water-Glycols

Standard pumps can be used without conditions.
However, if any type other than those in Table 2 is used, the maximum
operating pressure is limited.

(Table 2)● Anti-Wear Type Water-Glycols
Fluid Manufacturer

Commercial Trade Name

Shell Lubricants Japan K.K.

Shell HFC Fluid

ENEOS Corporation

HIGHLAND FRZ 46

MORESCO Corporation

HYDOL HAWCOSMO OIL LUBRICANTS
Co.,Ltd.

COSMO FLUID GS 46
COSMO FLUID HQ 46■ Fluid Viscosity and Temperature
Use the hydraulic fluids which satisfy the recommended viscosity and oil temperature given in the Table 3 below.
However, please note that if any of the pumps listed in the table 4 is started at low speed, the maximum fluid viscosity is limited.
● Fluid Viscosity and Temperature FluidTemperature°C

Petroleum Base Oils
Phosphate Esters
Water-Glycols

0-70
0-50

(Table 3)● Maximum Viscosity for Low Start-up Speed

Viscosity
mm2/s

20-400(Table 4)

Start-up Speedr/minMax. Viscosity
mm2/s

750

100

950

200

50T, PV2R2600

100

PV2R23950

200

Pump TypePV2R1, PV2R12
PV2R13■ Control of Contamination
Contamination of hydraulic fluids results in pump failures and reduced pump lives. Carry out sufficient contamination control for hydraulicfluids and keep contamination level within NAS class 12.
Also, use a 100 µm tank filter on the suction side, more than 50 mm away from the tank bottom.

B-2

Fixed Vane Pumps

VANE PUMPS
Instructions
Employ a flexible coupling whenever possible, and avoid any stress from bending or thrust.
Maximum permissible misalignment is less than 0.1 mm TIR and maximum permissible misangular is less than 0.2°.

■ Suction Pressure
Set the suction pressure at pump inlet port at the value given in the table below. Furthermore, use the pipes in the suction side having thediameter as indicated on the installation drawings. In case where the pump is installed on the tank or at the position higher than the tank top
cover, the height of the suction port of the pump should be less than 1 meter from the oil level {less than 0.8 meter in case of using
phosphate esters or water containing fluids}.
Suction Pressure
Minimum

Pump TypePetroleum Base Oils

Phosphate Esters
Water Containing Fluid

Maximum−16 kPa＋140 kPa−16 kPa＋30 kPa

Single Pumps50T, 150T

−20 kPa"PV2R" Series
Single Pumps

PV2R1, PV2R2−20 kPa

PV2R3, PV2R4−20 kPa ★

PV2R12−20 kPa

PV2R13, PV2R23−20 kPa ★

"PV2R" Series
Double Pumps

Fixed Vane Pumps

B■ Alignment of Shaft★ In relation to the rotating speed of the pump, the minimum suction pressure may be restricted for a certain nominal displacement. For details, pleaserefer to the specifications of the pump concerned.

■ Precautions at Starting
At an initial operation or at an operation after a long rest, the pump may have difficulty in sucking up fluid. In such cases, an air bleed valve
should be installed beforehand on the discharge side (model No. ST1004-＊-10), or discharge air by slightly slackening the connection on
the discharge side. At starting, operate the pump intermittently as far as possible with no load. For fluid viscosity at starting, see the item of"Hydraulic Fluids".

■ Other Precautions
If a pump is used at speed below 1200 r/min, install the pump with the suction port upside so that the pump can suck up fluid easily atstarting.

Fixed Vane Pumps

B-3Interchangeability in Installation between Current and New Design
The models shown below have been changed in design.
NameModel Numbers
CurrentNew

Interchangeabilityin Installation

Major Changes''PV2R1'' Series
Single Pumps

PV2R1−＊−＊−RAA−4222

PV2R1−＊−＊−RAA−43

Yes● Change only design number''PV2R2'' Series
Single Pumps

PV2R2−＊−＊−RAA−40

PV2R2−＊−＊−RAA−41

Yes● Lower noise level''PV2R3'' Series
Single Pumps

PV2R3−＊−＊−RAA−30

PV2R3−＊−＊−RAA−31

Yes● Lower noise level''PV2R12'' Series
Double Pumps

PV2R12−＊−＊−＊−REAA−4222 PV2R12−＊−＊−＊−REAA−43

Yes''PV2R13'' Series
Double Pumps

PV2R13−＊−＊−＊−RAAA−4222 PV2R13−＊−＊−＊−RAAA−43

Yes''PV2R14'' Series
Double Pumps

PV2R14−＊−＊−＊−RAAA−3222 PV2R14−＊−＊−＊−RAAA−33

Yes''PV2R23'' Series
Double Pumps

PV2R23−＊−＊−＊−REAA−40

PV2R23−＊−＊−＊−REAA−41

Yes''PV2R33'' Series
Double Pumps

PV2R33−＊−＊−＊−RAAA−30

PV2R33−＊−＊−＊−RAAA−31Yes● Change only design number● Lower noise level

B-4''PV2R24'' Series
Double Pumps

PV2R24−＊−＊−＊−RAAA−30

PV2R24−＊−＊−＊−RAAA−31

Yes''PV2R34'' Series
Double Pumps

PV2R34−＊−＊−＊−REAA−30

PV2R34−＊−＊−＊−REAA−31

Yes

Fixed Vane Pumps