E 5.169.2.0/12.10

120

Pressure Relief Valve

Spool Type, Pilot-Operated

with Electrical Venting

Metric Cartridge – 350 bar

DB12120APMZ

Up to 200 l/min

Up to 350 bar

The pressure relief valve

DB12120APMZ is a pilot-operated spool

valve with electrical venting.

If the pressure at port 1 exceeds the

pre-set spring tension, the pilot stage

opens and oil ows from behind the

main piston to tank port 2. The resulting

pressure differential causes the main

piston to open and allows oil to ow from

port 1 to port 2.

It can also be switched electrically so

that oil ows through the valve below

the set pressure. In this case the

valve is open providing the solenoid is

energized.

Features

 Pressure relief function with electrical venting

 Excellent stability throughout the entire ow range

All exposed surfaces zinc-plated and corrosion-proof

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

components to ensure minimal wear and extended service life

Robust design using one-piece valve body minimizes the effect of eccentricities

in cavity and maximizes reliability

Low pressure drop due to CFD optimized ow-path

 Adjustable across entire pressure range

 Various pressure ranges up to 350 bar

 Increased operating reliability due to protective strainer

Function

sPeciFications

Operating pressure: max. 350 bar

Flow rate: max. 200 l/min

Setting pressure range: Up to 350 bar

Media operating temperature range: min. -30 °C to max. +120 °C

Ambient temperature range: min. -30 °C to max. +80 °C

Fluid: Hydraulic oil to DIN 51524 Part 1 + 2

Viscosity: min. 7.4 mm²/s to max. 420 mm²/s

Filtration: Class 21/19/16 to ISO 4406

or cleaner

MTTF

: 150 years

Installation: No orientation restrictions,

preferably horizontal

Materials: Valve body: high-tensile steel

Piston: hardened and

ground steel

Seals: NBR (standard)

FKM (optional,

temperature range

to -20 °C)

Back-up rings: PTFE

Cavity: 12120A

Weight: Valve 0.55 kg, Coil 0.23 kg

Electrical data:

Type of voltage: DC solenoid,

AC voltage is rectied

using a bridge rectier

built into the coil

Current draw at 20 °C: 1.5 A at 12 V DC

0.8 A at 24 V DC

Voltage tolerance: -15% to +15% of the nominal voltage

Coil duty rating: Continuous up to 115 % of

nominal voltage at max. 60 °C

ambient temperature

E 5.169.2.0/12.10

121

PerFormance

model code

DB 12120APMZ - 01 - C - N - 350 V - 24 DG

Basic model

Pressure relief valve

Cavity to ISO

12120A = 2-way cavity

Type

01 = standard

Body and ports*

C = cartridge only

Versions with body on request

Seals

N = NBR (standard)

V = FKM (optional)

Pressure setting range

350 = up to 350 bar

Adjustment option

V = adjustable using tool

Coil voltage

12 = 12 VDC, 24 = 24 VDC

AC (internally full wave rectied)

115 = 115 V AC

230 = 230 V AC

Other voltages on request

Coil connectors (Coil...40-1836)

DC: DG = connector to EN175301-803

DK = Kostal threaded connector

DL = leadwires (2), 0.75mm²

DN = Deutsch connector, 2 pole

DT = AMP Junior Timer, 2 pole, radial

AC: AG = connector to EN175301-803

Other connectors on request

dimensions

Pressure differential

Flow rate

cavity

12120A

Cartridge form tools

Tool Part No.

Pre-forming tool 175002

Countersink 162128

Reamer MK2 174874

Tap 1002625

Measured at ν = 34 mm²/s, T

oil

= 46 °C

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

The information in this brochure

relates to the operating conditions and

applications described. For applications

and operating conditions not described,

please contact the relevant technical

department. All technical details are

subject to change without notice.

NOTE

Millimeter

Subject to technical modications

Standard models

Model code Part No.

DB12120APMZ-01-C-N-350V-24DG 3166891

Other models on request

Millimeter

Subject to technical modications

*Standard line bodies

Code Part No. Material Ports

R12120A-01X-01 396489 Steel, zinc-plated G3/4

Other line bodies on request

tting depth

thick

Ø9 through-holes

hex SW32 metric

torque 100

+10

After loosening the nut, coil

can be rotated or removed

torque 4

SW 1/2"

torque 8

bleed screw

torque 2.5

+0.5

pressure setting

SW6

Pressure differential

Flow rate