Directional valve

3-way/2-position

max

= 40 l/min, p

max

= 350 bar

Direct acting, spool type, switching solenoid

Type series: WKDP32G-8U-…

– Screw-in cartridge valve for cavity AU/C1030

– All external parts with zinc-nickel plating according to

DIN EN ISO 19598

– Installation in threaded port body type GAU-12

– Fits common cavity according to ISO and NFPA

– Reliable switching, even after long dwell times

– Low head loss

– Optional with manual override

– The slip-on coil can be rotated, and it can be replaced

without opening the hydraulic envelope

– High pressure wet-armature solenoids

– Various plug-connector systems and voltages are

available

Symbol

Description

The 3-way/2-position solenoid operated spool valves,

series WKDP32G…, are NG 8, direct acting, pressure

balanced screw-in valves with a 7/8-14 UNF mounting

thread. They are designed on the proven sliding-

spool principle. The straightforward design delivers an

outstanding price/performance ratio. All external parts

of the screw-in valves are zinc-nickel plated and are thus

suitable for use in the harshest operating environments.

The slip-on coils can be replaced without opening the

hydraulic envelope and can be positioned at any angle

through 360°. These valves are primarily used in mobile

and industrial applications as pilot valves for control

ling the travel direction of actuators such as hydraulic

motors and cylinders. For self-assembly, please refer to

the section related data sheets.

Type series: WKDP32G-8U-… 1 / 5 Reference: 400-P-120920-EN-02/04.2024

Technical data

General characteristics Description, value, unit

Function group directional valve

Function 3-way/2-position

Design screw-in cartridge valve

Controls switching solenoid

Characteristic direct acting, spool type

MTTFd value 150 years

Construction size NG 8 / SAE 10

Thread size 7/8-14 UNF-2A

Mounting attitude unrestricted

Weight 0.54 kg

Cavity acc. ISO fits into ISO 17209: 7/8-03-0-13

Cavity acc. NFPA fits into NFPA/T3.5.50: 0.875-03-0-09

Cavity acc. factory standard AU/C1030

Tightening torque steel 80 Nm

Tightening torque aluminium 80 Nm

Tightening torque tolerance ± 10 %

Minimum ambient temperature - 30 °C

Maximum ambient temperature + 50 °C

Surface protection

all external parts with zinc-nickel plating according to

DIN EN ISO 19598

Sealing material see ordering code

Seal kit order number NBR: DS-519-N / FKM: DS-519-V

Hydraulic characteristics Description, value, unit

Maximum operating pressure 350 bar

Maximum flow rate 40 l/min

Flow direction see symbol

Hydraulic fluid

HL and HLP mineral oil according to DIN 51 524;

other fluids on request!

Minimum fluid temperature - 30 °C

Maximum fluid temperature + 80 °C

Viscosity range 10 … 500 mm²/s (cSt)

Recommended viscosity range 15 … 250 mm²/s (cSt)

Minimum fluid cleanliness

(cleanlineless class according to ISO 4406:1999)

class 20/18/15

Type series: WKDP32G-8U-… 2 / 5 Reference: 400-P-120920-EN-02/04.2024

Electric characteristics Description, value, unit

Actuator type solenoid coil

Solenoid coils type 36X48/16.1

Supply voltage DC 12/24 V DC

Supply voltage AC 115/230 (50 … 60 Hz) V AC

Supply voltage tolerance ± 10 %

Nominal power consumption 19 W

Switching time

Switching time measured at: UN: Δp = 280 bar; Q = 32 l/min;

TAmbient = 20 °C; ϑ = 46 mm2/s) / 3 to 2: 21 ms (energizing)

26 ms (de-energizing), 2 to 1: 29 ms (energizing) 25 (de-ener

gizing), 2 to 3: 29 ms (energizing) 38 (de-energizing)

Relative duty cycle 100 %

Electrical connection coil several connection types available, see ordering code

Protection class solenoid coil to ISO 20 653 / EN 60 529

several classes of protection available, see ordering code

(with appropriate mating connector and proper fitting and

sealing)

NOTE!

The switching time can be strongly dependent

on flow rate, pressure, oil viscosity and the dwell

time under pressure. In practice, the switching

time may therefore deviate from the specified

value range.

Performance graphs

measured with oil viscosity 33.0 mm²/s (cSt), coil at steady-state temperature and 10 % undervoltage

p = f (Q) Performance limit Δp = f (Q) Pressure drop-flow rate characteristic

400-PG-0737

p [bar (psi)]

50 (725)

100 (1450)

150 (2150)

200 (2900)

250 (3600)

300 (4350)

350 (5000)

Q [l/min (gpm)]

4020 3010

(11)(5.25) (8)(2.75)

1) 2 → 1 solenoid de-energized

2) 2 ↔ 3 solenoid energized

400-PG-0736

2 (30)

4 (60)

6 (85)

8 (130)

10 (145)

Q [l/min (gpm)]

4020 30100

p [bar (psi)]∆

(11)(5.25) (8)(2.75)

Type series: WKDP32G-8U-… 3 / 5 Reference: 400-P-120920-EN-02/04.2024

Installation

35.5

(1.40)

(1.06)

(1.93)

41.15

(1.62)

73.5

(2.89)

120.2

(4.73)

46.7

(1.84)

(1.89)

12.5

(.492)

Ohne Handnotbetaetigung "O"

without manual override "O"

7/8-14 UNF-2A

MA =

2.7 [Nm]

2.0 [ft·lb]

± 10 %

MA = 1)

Ø16.00×2.00

Ø19.30×2.20

Ø14.00×1.78

Ø12.42×1.78

Ø12.00×1.45×1.00

Ø10.70×1.45×1.00

12.5

(.492)

37.75

(1.49)

Mit Handnotbetaetigung "P"

with manual override "P"

Mit Handnotbetaetigung schraubbar "S"

with screw-in manual override "S"

Beispiel für die Masseinheit:

Example for the dimensional units:

(.031) =

0.031''

inch

0.79 = 0.79 mm millimeter

NOTE!

1) When fitting the screw-in cartridge valve, use

the specified tightening torque. The value can be

found in the chapter "Technical data".

ATTENTION!

Only qualified personnel with mechanical skills

may carry out any maintenance work. Generally,

the only work that should ever be undertaken is

to check, and possibly replace, the seals. When

changing seals, oil or grease the new seals thor

oughly before fitting them.

NOTE!

The seals are not available individually. The seal

kit order number can be found in the chapter

"Technical data".

Type series: WKDP32G-8U-… 4 / 5 Reference: 400-P-120920-EN-02/04.2024

Ordering code

directional valve

spool-type

Ex.

1U8PKW D A G

nominal size 8 / SAE 10

W =

K =

8 =

technical design no. (omit when ordering)1 … 9 =

voltage e.g. 24 (24 V)… =

current DCD =

direct actingD =

3-way/2-position, normally closed32G =

electrically operated, V DC = 19 W P =

cavity type AU/C1030U =

32G N DO

with manual override

with screwable manual override

without manual override (standard)

O =

P =

FKM (fluorocarbon rubber / VITON) seals

(special seals on request)

NBR (nitril-butadien-rubber / BUNA) seals (standard)

N =

standard model according to valid data sheet

special model (on request)

A ... Q

Z ... R

Junior Timer radial plug connection (IP 65)

Junior Timer radial plug connection (with protection diode, IP 65)

DIN EN 175301-803 connection, 3-pole 2 P+E, without mating plug (IP65)

(standard)

connection without mating plug

only connection “G“ with mating plug

without

Deutsch plug connection DT04-2P, 2-pole radial (IP 67/69)

for the following plug-variants, please consult BUCHER:

Deutsch plug connection DT04-2P, 2-pole radial (with protection diode, IP 67/69)

DIN EN 175301-803 connection, 3-pole 2 P+E, without mating plug (with protection diode, IP65)

G =

Q =

U =

Related data sheets

Reference Description

400-P-040011 form tools

400-P-040291 cavity AU/C1030

400-P-738121 threaded port body GAU-12-…

400-P-120112 solenoid coil 36X48/16.1

400-P-010101 MTTFd Values for Hydraulic Valves

info.ch@bucherhydraulics.com www.bucherhydraulics.com

Data is provided for the purpose of product description only, and must not be construed as warranted characteristics in the legal sense. The

information does not relieve users from the duty of conducting their own evaluations and tests. Because the products are subject to continual

improvement, we reserve the right to amend the product specifications contained in this catalogue.

Type series: WKDP32G-8U-… 5 / 5 Reference: 400-P-120920-EN-02/04.2024