DIRECTIONAL VALVES

PD16-40 Piloted 3-Way Spool, External Vent

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 PD16-40 allows ﬂ ow passage from ➂ to ➁ bidirectionally,

while ﬂ ow is blocked at

➃. V is a spring chamber vent-to-atmosphere, which is

internally O-ring sealed from the cartridge ﬂ ow paths.

On remote pilot signal at

➀, the valve shifts to open from ➂ to ➃, while blocking

ﬂ ow at

➁.

The vented spring chamber allows PD16-40 to be fully pressurized at any port without

affecting required pilot pressure.

FEATURES

• Hardened spool and cage for long life.

• Optional sealed pilot.

• Industry common cavity.

RATINGS

Operating Pressure: 240 bar (3500 psi)

Proof Pressure: 350 bar (5075 psi)

Flow: See Performance Chart

Internal Leakage: 164 cc/minute (10 cu. in./minute) max. at 207 bar (3000 psi)

Pilot Pressure Required:

To Spool Crossover: 7.6 bar (110 psi)

To Full Spool Shift: 9.0 bar (130 psi)

Oil Volume Required to Full Shift: 2.5 cc (0.15 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: VC16-4; See page 9.116.1

Cavity Tool: CT16-4XX; See page 8.600.1

Seal Kit: SK16-4X-MMM; See page 8.650.1

Cap Vent Seal: 6003125

USASI:

ISO:

SYMBOLS

PERFORMANCE (Cartridge Only)

4.342.1

8.6/125

6.9/100

5.2/75

3.4/50

1.7/25

37.9

75.8

113.6

151.4

FLOW lpm/gpm

PRESSURE DROP bar/psi

189.3

to or to

32 cSt/150 ssu oil at 40°C

➂➂➃➁

HYDRAFORCE

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Note: This valve is designed with a dynamic oil-to-atmosphere seal in the

vent section. Ambient conditions will cause this vent seal to degrade which

will reduce the valve’s cycle life. If this could cause a problem, we suggest

that a non-vented model be selected. Consult factory for assistance.

Blue rectangles are links to other catalog pages.

Cartridge: Weight: 0.52 kg. (1.15 lbs.)

Steel with hardened work surfaces.

Zinc-plated exposed surfaces.

Buna N O-rings and polyester

elastomer back-ups standard.

Standard Ported Body: Weight:

1.5 kg. (3.3 lbs.); Anodized high-

strength 6061 T6 aluminum alloy,

rated to 207 bar (3000 psi). Ductile

iron bodies available; dimensions

may differ. See page 8.016.1

DIMENSIONS

MATERIALS TO ORDER

PD16-40

4.342.2

Option

None

(Blank)

Open Transition N

Porting

Cartridge Only 0

SAE 12, SAE 6 Pilot 12T

SAE 16, SAE 6 Pilot 16T

PD16-40__ - __ __ __ - __ - __

Seals

N Buna N (Std.)

NS Buna N with Sealed Spool

(110 psi spring minimum required)

V Fluorocarbon

VS Fluorocarbon with Sealed Spool

(110 psi spring minimum required)

Bias Spring

†

60 4.1 bar (60 psi)

80 5.5 bar (80 psi)

110 7.6 bar (110 psi)

170 11.7 bar (170 psi)

Optional bias springs considered

on OEM request.

†

Note: 110 psi bias spring is the

minimum required for use with

sealed spool.

HYDRAFORCE

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Blue rectangles are links to other catalog pages.