544

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Proportional

Flow Control Valve

Spool Type, Pilot-Operated,

Normally Closed

Cartridge – 280 bar

PWK12120WP

200 l/min

280 bar

The PWK12120WP is a normally closed,

spool type, pilot-operated proportional

ow control valve. Together with a

pressure compensator, which maintains

a constant differential between the inlet

pressure (port 1) and the outlet pressure

(port 2), it can be used as a proportional

ow regulator.

The energization of the coil reduces or

increases an orice cross-section via the

pilot stage and thus controls the useable

oil ow.

The spring tted between the main and

pilot pistons acts against the solenoid

force - this force feedback ensures that

the ow control piston always maintains

a stable position.

General

z Reliable and cost-effective proportional control of the ow by controlling the

position of the ow control piston using force feedback

z Smooth opening and closing

z Excellent dynamic performance

z Low hysteresis

z Excellent repeatability

z Optional internal damping of the control piston to dampen vibrations in

applications prone to vibrations such as lifting equipment

z All surfaces zinc-plated and corrosion-proof

z Coil seals protect the solenoid system

z Wide variety of connectors available

z All valve parts made of high-strength steel with hardened and ground components

to ensure minimal wear and extended service life

z Different ow rate ranges available

Function

SPeciFicationS

Operating pressure: Max. 280 bar

Nominal ow: Max. 200 l/min

Permitted pressure differential between

ports 1 and 2:

Max. 50 bar

Media operating temperature range: Min. -20 °C to max. +100 °C

Ambient temperature range: Min. -20 °C to max. +60 °C

Operating uid: Hydraulic oil to DIN 51524 Part 1 + 2

Viscosity range: min. 10 mm²/s to max. 420 mm²/s

Filtration: Class 19/17/14 according to ISO 4406

or cleaner

MTTF

: 150 years

Installation: No orientation restrictions

Material: Valve body: steel

Piston: hardened and

ground steel

Seals: NBR (standard)

FKM (option)

Back-up rings: PTFE

Cavity: Metric 12120

Weight: Valve complete: 0.33 kg

Coil only: 0.19 kg

Electrical details

Control currents: Max. 2.1 A; 2.2 Ohm (12V coil)

Max. 1.05 A; 8.8 Ohm (24V coil)

Dither frequency: Approx. 160 Hz

Duty cycle: 100 %

Hysteresis with dither: ≤ 5 % of max. control current (undampened)

≤ 8 % of max. control current (dampened)

Type of coil: Coil (12 or 24)...-40-1836

Note: In order to achieve optimum function, any trapped air should be vented with

the bleed screw of the pole tube.

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Model code

PWK12120 WP - 01 M - C - V - 01 - 24 PG - 8.8

Basic model

Proportional

Flow control valve, metric

Function symbol

Normally closed,

pilot-operated

Type

01 = with damping

02 = without damping

Manual override

Omission = without manual override

M = with manual override

Body and ports

C = Cartridge only

Seals

V = FKM (standard)

N = NBR (optional)

Flow rate range and control characteristics

Types 01, 03, 04, 11, 12, 14 see Q-I diagrams

Coil voltage

12 = 12 Volt DC (2.2 Ohm)

24 = 24 Volt DC (8.8 Ohm)

Other voltages on request

Coil connector

PG = DIN connector to EN175301-803

PL = Lead wires (2), 0.75mm², 457 mm long

PN = Deutsch connector, 2 pole

PT = AMP Junior Timer, 2 pole, radial

Coil resistance

2.2 = 2.2 Ohm (12V)

8.8 = 8.8 Ohm (24V)

diMenSionS

Millimeter (inch)

Subject to technical modications

cavity

Metric 12120

Millimeter (inch)

Subject to technical modications

HYDAC Fluidtechnik GmbH

Justus-von-Liebig-Str.

D-66280 Sulzbach/Saar

Tel: 0 68 97 /509-01

Fax.: 0 68 97 /509-598

E-Mail: utec@hydac.com

curveS

Measured at

n = 34 mm

oil

= 46 °C

Standard models

Model code Part No.

PWK12120WP-01-C-V-01-24PG-8.8 3398440

PWK12120WP-01-C-V-03-24PG-8.8 3398441

PWK12120WP-01-C-V-04-24PG-8.8 3398442

PWK12120WP-02-C-V-11-24PG-8.8 3398443

PWK12120WP-02-C-V-12-24PG-8.8 3398444

PWK12120WP-02-C-V-14-24PG-8.8 3398485

Other models on request

NOTE

The information in this brochure relates to

the operating conditions and applications

described.

For applications or operating conditions

not described, please contact the relevant

technical department.

Subject to technical modications.

tting depth

Manual override

Int. hex. SW3

Sealing nut hex. SW10

Torque value

±1

Hex. SW32

Torque

±10

To operate valve

manually and for

venting, remove

protective cap

and loosen

sealing nut.

Torque value 4

±2

After loosening mounting nut,

coil can be rotated through

360° and removed.

For venting, remove nut and

loosen cross-head screw.

After venting, tighten screw

to 2.5

±0.5

Nm.

Standard line bodies

Code Part No. Material Ports Pressure

R12120-10X-01 396708 Steel, zinc-plated G3/4 350 bar

R12120-10X-02 396707 Steel, zinc-plated M 27 x 2 350 bar

Other line bodies on request

Cartridge form tools

Tool Part No.

Countersink (shank MK3) 172880

Reamer (shank MK2) 1014207