Pressure reducing valve type ADM

Product documentation

Operating pressure pmax: 315 bar

Flow rate Qmax: 60 lpm

D 7120
11-2021 -1.0 en
© by HAWE Hydraulik SE.
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Printing date / document generated on: 19.11.2021

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 Table of Contents

1 Overview of pressure reducing valves type ADM................................................................................................. 4

2 Available versions............................................................................................................................................ 5
2.1 Basic type and size............................................................................................................................................5
2.2 Pressure range................................................................................................................................................... 6
2.3 Pressure adjustment........................................................................................................................................... 6

3 Parameters....................................................................................................................................................... 7
3.1 General data......................................................................................................................................................7
3.2 Weight.............................................................................................................................................................. 8
3.3 Pressure and volumetric ow............................................................................................................................... 8
3.4 Characteristic lines.............................................................................................................................................9

4 Dimensions.................................................................................................................................................... 10
4.1 Valve for pipe connection..................................................................................................................................10
4.2 Valve for manifold mounting..............................................................................................................................11
4.3 Pressure adjustment..........................................................................................................................................12

5 Installation, operation and maintenance information....................................................................................... 13

5.1 Intended use................................................................................................................................................... 13
5.2 Assembly information....................................................................................................................................... 13
5.3 Operating instructions.......................................................................................................................................13
5.4 Maintenance information................................................................................................................................... 14

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 1 Overview of pressure reducing valves type ADM

Pressure reducing valves are a type of pressure valve. They maintain a largely
constant outlet pressure even at a variable (higher) inlet pressure. In hydraulic
systems with multiple consumers, each individual consumer can be assigned a
pressure reducing valve. This way, each consumer's pressure can be set to a lower
level separately.
The pressure reducing valve type ADM is directly controlled. The valves have an
override compensation. If for instance the secondary pressure rises above the set
value due to external forces, then they act like a pressure-limiting valve. There is a
design-related leakage ow.
Features and benets
• Integrated overpressure function
• Various adjustment options
Area of application
• General hydraulic systems
• Fixtures
• Test benches

Pressure reducing valve type ADM

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 2 Available versions

Circuit symbol

ADM ADM ... P

Pipe connection Manifold mounting

Ordering example

ADM 22 D R -110

Pressure setting (bar)

2.3 "Pressure adjustment"

2.2 "Pressure range"

2.1 "Basic type and size"

NOTE
If no pressure setting is stated, the valve is set to the maximum value of the corresponding pressure range ex-works.

2.1 Basic type and size

Type Flow rate P d A Pressure pmax (bar) Connections per ISO 228-1
Qmax (lpm) at port P
P, A L
Pipe connection
ADM 11 12 315 G 1/4 G 1/4
ADM 21 25 G 1/4
ADM 22 25 G 3/8
ADM 32 60 G 3/8
ADM 33 60 G 1/2
Manifold mounting
ADM 11 P 12 315 see Chapter 4.2, "Valve for
manifold mounting"
ADM 22 P 25
ADM 33 P 60

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2.2 Pressure range

Coding Pressure range pA (bar)

ADM 11 ADM 2.. ADM 3..
A 160 ... 250 160 ... 250 130 ... 250
C 60 ... 160 45 ... 160 30 ... 160
D 30 ... 120 30 ... 120 25 ... 100
F 10* ... 50 10* ... 30 15* ... 25
* Flow rate only up to approx. 40% of Qmax

NOTE
The pressure values apply when Qp d A = 0 lpm, i.e. the consumer is in end position and is not moving (static pressure).
When Q . 0, the pA pressure drops slightly as long as the consumer has not yet reached its end position.
see Chapter 3.4, "Characteristic lines"

2.3 Pressure adjustment

Coding Description Circuit symbol

Without coding Standard, tool adjustable
R Manually adjustable (wing bolt and wing nut)
V Turning knob (self-locking)
H Turning knob, lockable (key in line with factory specifications for the automotive industry;
included in the scope of delivery, with an additional key held by the authorised plant
personnel)

T Pin (with aluminium spring dome), ADM(P) 11 only

if drain port L is routed to the tank in an unpressurised state (<20 bar)
TS Pin (with steel spring dome), ADM(P) 11 only
if counter-pressure at drain port L is greater than 20 bar

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 3 Parameters

3.1 General data

Designation Pressure reducing valve

Design Directly controlled spool valve with override compensation.

Model Single valve for pipe connection or manifold mounting

Material • Valve block nitrided steel

• Bore diamond honed
• Control piston made of stainless steel, hardened and ground
• Bore and piston deburred by polishing
• Spring dome made of zinc die casting

Attachment Mounting thread or tapped holes, see Chapter 4, "Dimensions"

Installation position Any

Ports/connections ■ P = Pump (inlet)

■ A = Consumer
■ L = Leakage (unpressurised to the tank, see Chapter 3.3, "Pressure and volumetric ow")
Connecting thread:
P, A, L: see Chapter 2.1, "Basic type and size"

Flow direction Working direction P d A

Free return ow A d P only permissible for small ow rates below about 50% of Qmax.
Otherwise, a bypass check valve must be installed for free return ow and for viscosities > 150 mm2/s (see
Chapter 3.4, "Characteristic lines")
Overdrive A d L possible:
up to about 25 … 30% of Qmax with ADM 3..
up to about 50 … 60% of Qmax with ADM 11 and ADM 2..

Hydraulic uid Hydraulic uid, according to DIN 51 524 Parts 1 to 3; ISO VG 10 to 68 according to DIN ISO 3448
Viscosity range: 4 - 1500 mm2/s
Optimal operating range: approx. 10 - 500 mm2/s
Also suitable for biologically degradable hydraulic uids type HEPG (polyalkylene glycol) and HEES (synthetic
ester) at operating temperatures up to approx. +70°C.

Cleanliness level ISO 4406

20/17/14

Temperatures Environment: approx. -40 to +80 °C, hydraulic uid: -25 to +80 °C, pay attention to the viscosity range.
Start temperature: down to -40°C is permissible (observe start viscosities) as long as the steady-state
temperature is at least 20K higher during subsequent operation.
Biologically degradable hydraulic uids: note manufacturer specifications. With consideration for the seal
compatibility, not above +70°C.

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3.2 Weight

Pipe connection Type

ADM 11 = 0.6 kg
ADM 21 = 0.7 kg
ADM 22 = 0.7 kg
ADM 32 = 1.0 kg
ADM 33 = 1.0 kg

Manifold mounting Type

ADM 11 P = 0.6 kg
ADM 22 P = 0.9 kg
ADM 33 P = 1.1 kg

3.3 Pressure and volumetric ow

Operating pressure ■ On the pump side pmax = 315 bar

■ Consumer side pA max, see Chapter 2.2, "Pressure range"
■ Reux pL $ 20 bar

DAMAGE
Pressure at L is added to pressure at A.

Flow rate see Chapter 2.1, "Basic type and size"

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3.4 Characteristic lines

Viscosity of the hydraulic uid approx. 50 mm2/s

pA - QP d A - Characteristic lines (example type ADM 22 C)

QA d L overdrive (lpm), QP dA consumer current (lpm); pA pressure (bar)

1 Setting 160 bar

2 Setting 100 bar
3 Setting 50 bar

An overdrive occurs when an external force exceeding the pA setting acts on the consumer and pushes the ow back in the A direction.
The return ow is discharged via A → L ab, the consumer pressure pA rises slightly above the pressure setting.
Sp-Q characteristic line for free return ow A d P

Q ow rate (lpm); Sp ow resistance (bar)

DAMAGE
Note information for ow direction (see Chapter 3.1, "General data").

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 4 Dimensions

All dimensions in mm, subject to change.

4.1 Valve for pipe connection

1 Sealing option

Type B H a a1 b b1 #d e e1 e2 f h Connections per ISO 228-1

P, A L
ADM 11 45 50 33 6 26.5 36.5 6.5 15 23 25 3.5 49.5 G 1/4 G 1/4
ADM 21 50 58 38 6 32 42 6.5 18 26 28 3.5 49.5 G 3/8 G 1/4
ADM 22
ADM 32 60 70 40 10 10 58 9 28 28 40 8 59.5 G 1/2 G 1/4
ADM 33

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4.2 Valve for manifold mounting

Hole pattern

1 Sealing option
2 For tightening torque see table below

Base plate

1 O-ring NBR 90 Sh

Type B L a a1 b c #d #d1 e e1 f g h Tightening O-ring Connections per

torque (Nm) ISO 228-1
P, A L P, A L
ADM 11 P 35 50 24 17 24 6 6 6 10 12.5 3.5 M6x45 41 9.5 7.65x1.78 G 1/4 G 1/4
ADM 22 P 40 58 26 20 24 6 8 8 12 14 3.5 M6x50 51.5 9.5 9.25x1.78 G 3/8 G 1/4
ADM 33 P 40 70 40 14 28 8 10 8 9 16 8 M8x50 51.5 23 12x2 9.25x1.78 G 1/2 G 1/4

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4.3 Pressure adjustment

Adjustment device without coding Adjustment device coding R Adjustment device coding H

Adjustment device coding V Coding pressure range Sp/revolution (bar/R)

ADM 11 ADM 2.. / ADM 3..
A 55 49
C 43 14
D 12 11
F 4 2

Type h h1
ADM 11 41 58
ADM 21 41 58
ADM 22
ADM 32 56 64
ADM 33

Adjustment device coding T, TS

DAMAGE
Do not exceed the actuation end position!
Actuation in axial direction only (lateral forces not permissible).
Design the actuating element pressing the pin accordingly or provide it with its
own end stop.

Coding pressure range Actuation

1 Stroke Stroke (mm) Force (N)
A 7.5 570
C 12.5 385
D 13 260
F 16.5 67

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 5 Installation, operation and maintenance information

Observe the document B 5488 “General operating instructions for assembly, commissioning, and maintenance.”

5.1 Intended use

This product is intended exclusively for hydraulic applications (uid technology).

The user must observe the safety measures and warnings in this document.
Essential requirements for the product to function correctly and safely:
All information in this documentation must be observed. This applies in particular to all safety measures and warnings.
The product must only be assembled and put into operation by specialist personnel.
The product must only be operated within the specied technical parameters described in detail in this document.
All components must be suitable for the operating conditions when using an assembly.
The operating instructions for the components, assemblies and the specic complete system must also always be observed.
If the product can no longer be operated safely:
1. Remove the product from operation and mark it accordingly.
✓ It is then not permitted to continue using or operating the product.

5.2 Assembly information

The product must only be installed in the complete system with standard and compliant connection components (screw ttings, hoses,
pipes, xtures etc.).
The product must be shut down correctly prior to disassembly (in particular in combination with hydraulic accumulators).

DANGER
Sudden movement of the hydraulic drives when disassembled incorrectly
Risk of serious injury or death
► Depressurise the hydraulic system.
► Perform safety measures in preparation for maintenance.

5.3 Operating instructions

Observe product configuration and pressure/ow rate.

The statements and technical parameters in this document must be strictly observed.
The instructions for the complete technical system must also always be followed.

DAMAGE
Read the documentation carefully before usage.
The documentation must be accessible to the operating and maintenance staff at all times.
Keep documentation up to date after every addition or update.

CAUTION
Overloading components due to incorrect pressure settings.
Risk of minor injury.
■ Pay attention to the maximum operating pressure of the pump and the valves.
■ Always monitor the pressure gauge when setting and changing the pressure.

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Purity and ltering of the hydraulic uid
Fine contamination can significantly impair the function of the product. Contamination can cause irreparable damage.
Examples of ne contamination include:
■ Swarf

■ Rubber particles from hoses and seals

■ Dirt due to assembly and maintenance

■ Mechanical debris

■ Chemical ageing of the hydraulic uid

DAMAGE
New hydraulic uid from the manufacturer may not have the required purity.
Damage to the product is possible.
► Filter new hydraulic uid to a high quality when lling.
► Do not mix hydraulic uids. Always use hydraulic uid that is from the same manufacturer, of the same type, and with the
same viscosity properties.

For smooth operation, pay attention to the cleanliness level of the hydraulic uid (cleanliness level see Chapter 3, "Parameters").
Additionally applicable document: D 5488/1 Oil recommendations

5.4 Maintenance information

Check regularly (at least once a year) by visual inspection whether the hydraulic connections are damaged. If external leakages are
found, shut down and repair the system.
Clean the surface of the device regularly (at least once a year) (dust deposits and dirt).

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 References

Additional versions
■ Pressure reducing valve type ADC, ADM, ADME, AM: D 7458

■ Pressure-reducing valve type CDK: D 7745

■ Pressure-reducing valve type DK, DZ and DLZ: D 7941

Application
■ Compact pump type MP: D 7200

■ Directional spool valve bank type SWS: D 7951

■ Compact hydraulic power pack type KA and KAW size 2: D 8010

■ Proportional directional spool valve, type PSL and PSV size 2: D 7700-2

■ Proportional directional spool valves types PSL/PSV/PSM, size 3: D 7700-3

■ Proportional directional spool valve, type PSL, PSM and PSV size 5: D 7700-5

■ Compact hydraulic power pack type HK 4: D 7600-4

■ Compact hydraulic power pack type MPN and MPNW: D 7207

■ Compact hydraulic power pack type HKL and HKLW: D 7600-3L

D 7120 11-2021-1.0

HAWE Hydraulik SE
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Phone +49 89 379100-1000 | info@hawe.de | www.hawe.com

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