DIRECTIONAL VALVES

PD10-44 Piloted 2-Way Spool

DESCRIPTION

A screw-in, cartridge-style, pilot-operated, spool-type, hydraulic directional valve for

three-way circuits requiring remote pilot actuation.

OPERATION

In neutral (unpiloted), the PD10-44 blocks ﬂ ow from ➂ to ➁ bidirectionally. The spring

chamber is directed to port

➃, which is internally O-ring sealed from the cartridge ﬂ ow

paths.

On remote pilot signal at

➀, the valve shifts to open from ➁ to ➂, bidirectionally.

Any pressure on port

➃ is added to the spring value.

FEATURES

• Hardened spool and cage for long life.

• Industry common cavity.

RATINGS

Operating Pressure: 240 bar (3500 psi)

Flow: See Performance Chart

Internal Leakage: 82 cc/minute (5 cu. in./minute) max. at 207 bar (3000 psi)

Pilot Pressure Required:

To Spool Crossover: 7.6 bar (110 psi) with a 110 psi bias spring

To Full Spool Shift: 8.6 bar (125 psi) with a 110 psi bias spring

Oil Volume Required to Full Shift: 0.65 cc (0.04 cu. in.)

Temperature: -40 to 120°C with standard Buna seals

Filtration: See page 9.010.1

Fluids: Mineral-based or synthetics with lubricating properties at viscosities of

7.4 to 420 cSt (50 to 2000 sus); See Temperature and Oil Viscosity, page 9.060.1

Installation: No restrictions; See page 9.020.1

Cavity: VC10-4; See page 9.110.1

Cavity Tool: CT10-4XX; See page 8.600.1

Seal Kit: SK10-4X-MMM; See page 8.650.1

SYMBOLS

USASI ISO:

PERFORMANCE (Cartridge Only)

4.355.1

8.6/125

6.9/100

5.2/75

3.4/50

1.7/25

7.5

15.1

30.2

FLOW lpm/gpm

PRESSURE DROP bar/psi

32 cSt/150 ssu oil at 40°C

37.9

22.7

➁ to ➂ or ➂ to ➁

HYDRAFORCE

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DIMENSIONS

Cartridge: Weight: 0.16 kg. (0.35 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-ups standard.

Standard Ported Body: Weight:

0.34 kg. (0.75 lbs.); Anodized high-

strength 6061 T6 aluminum alloy,

rated to 207 bar (3000 psi). Ductile

iron bodies available; dimensions

may differ. See page 8.010.1

TO ORDER

PD10-44

4.355.2

Bias Spring

†

60 4.1 bar (60 psi)

110 7.6 bar (110 psi)

170 11.7 bar (170 psi)

Porting

Cartridge Only 0

SAE 6 6T

SAE 8 8T

1/4 in. BSP* 2B

3/8 in. BSP* 3B

*BSP Body

U.K. Mfr. Only

PD10-44 - __ __ __ - __ - __

Seals

NS Buna N with Sealed Spool

VS Fluorocarbon with Sealed Spool

Optional bias springs considered

on OEM request

1.25

31.8

1.25

31.8

2.50

63.5

1.00

25.4

1.17

29.7

2.44

62.0

1.36

34.5

2.84

72.1

3.25

82.6

2.00

50.8

0.28

7.1

1.99

50.5

0.74

18.8

0.25

6.4

INCH

MILLIMETRE

ACROSS

FLATS

TORQUE

25 ft-lbs

(33.9 Nm) max.

†

Note: 110 psi bias spring is the

minimum required for use with

sealed spool.

HYDRAFORCE

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MATERIALS

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