By Product Type

Proportional pressure-limiting valve type PDV and PDM

Product description

Proportional pressure-reducing valves are a type of pressure control valve. They remotely control the pressure in hydraulic systems continually and electrically.

The proportional pressure-reducing valve type PDM is a piloted valve with a piston and is controlled electro-proportionally. The valve has an external control oil drain. It continuously maintains a constant pressure on the secondary pressure side, independently of the inlet side. The pressure reducing valve is available as a single valve for pipe connection or as a manifold mounting valve.

The proportional pressure-reducing valve PDM is particularly suitable for dynamic control of the pressure level in hydraulic systems.

Features and benefits:
  • Integrated overpressure function
Intended applications:
  • General hydraulic systems
  • Equipment
  • Test benches
  • Hydraulic tools
Technical data - Type PDM - Prop. pressure reducing valve
Size3DesignPortingWorking pressure350System pressure350Flow rate (lpm)40DocumentDownloadsConfiguratorConfigurator
Size4DesignPorting, Manifold mountingWorking pressure350System pressure350Flow rate (lpm)80DocumentDownloadsConfiguratorConfigurator
Size5DesignPorting, Manifold mountingWorking pressure350System pressure350Flow rate (lpm)120DocumentDownloadsConfiguratorConfigurator
Size11DesignPortingWorking pressure320System pressure350Flow rate (lpm)12DocumentDownloadsConfiguratorConfigurator
Size21DesignPortingWorking pressure180System pressure350Flow rate (lpm)20DocumentDownloadsConfiguratorConfigurator
Size22DesignPortingWorking pressure180System pressure350Flow rate (lpm)20DocumentDownloadsConfiguratorConfigurator
SizeDesignWorking pressureSystem pressureFlow rate (lpm)DocumentConfigurator3Porting35035040DownloadsConfigurator4Porting, Manifold mounting35035080DownloadsConfigurator5Porting, Manifold mounting350350120DownloadsConfigurator11Porting32035012DownloadsConfigurator21Porting18035020DownloadsConfigurator22Porting18035020DownloadsConfigurator
Technical data - Type PDMP - Prop. pressure reducing valve
Size11DesignManifold mountingWorking pressure320System pressure350Flow rate (lpm)12DocumentDownloadsConfiguratorConfigurator
Size22DesignManifold mountingWorking pressure180System pressure350Flow rate (lpm)20DocumentDownloadsConfiguratorConfigurator
SizeDesignWorking pressureSystem pressureFlow rate (lpm)DocumentConfigurator11Manifold mounting32035012DownloadsConfigurator22Manifold mounting18035020DownloadsConfigurator
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Directional spool valve type SWPN
LV_S20_1_D7529.cmyk.100x100
LV

Nomen-
clature:

Shut-off valve
(idle circulation valve, directly controlled or pilot-controlled)

Design:
Individual valve for pipe connection
Individual valve
Manifold mounting

Adjustment:
Fixed
manually adjustable

pmax:
bar
bar

Qmax:
25 l/min
l/min

Cylinder type LV
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MPN_S4_3_D7207.cmyk.100x100
MP, MPW

Nomen- clature:
Radial piston and/or gear pump with integrated motor single or dual-circuit pump

Design:
Oil immersed hydraulic power pack
for intermittent or load/no load operation
(S2-/S3-/S6-service)

pmax:
Radial piston pump bar (high pressure), gear pump 220 bar (low pressure)

Qmax:
12.4 lpm (high pressure) (Vg = 9.17 cm3/rev) 83 lpm (low pressure) (Vg = 61 cm3/rev)

Vt max:
100 l

Compact hydraulic power pack type MP and MPW
Foreword to the online edition of the O+P-Fachlexikon "Fluidtechnik von A bis Z" (O+P technical glossary "Fluid technology from A to Z")

Hydraulic and pneumatic drive and control technology – collectively termed fluid technology – is a comparatively young specialist area of drive and automation technology that only started to become used widely in industry in the middle of the 20th century. Prior to that it was mostly in special applications where the benefits of fluid technology were used, for instance in pneumatic brakes for railway rolling stock or hydraulic steering power assistance systems for cars, on presses or in servo hydraulic follow up controls for aircraft systems.

In the 1950s fluid technology started to be used increasingly in machine and plant engineering, in mobile machinery, in motor vehicles, in shipping as well as in aerospace. It was used to automate work processes, to simplify machine designs and to increase performance. Even though fluid technology was of varied application and was an important specialist area for mechanical engineering, up to this point it was not a subject at colleges and universities – unlike electrical engineering. As a consequence up until the 1970s hydraulic components and systems were primarily developed by innovative engineers based on customer requirements and practical experience. Countless devices, parts for devices and technical methods came about and had to be given names so manufacturers and users could understand each other. Many manufacturers undertook this task largely at their own discretion, especially as by means of clever neologisms they were able to differentiate themselves from competitors. This situation marked the terminology in fluid technology for a long time.

With the O+P-Fachlexikon "Fluidtechnik von A bis Z" (O+P technical glossary "Fluid technology from A to Z"), the 1st edition of which was published in 1989 by Vereinigte Fachverlage in Mainz, Hans Ebertshäuser made an important contribution to defining and explaining the terms and names used in fluid technology. The lexicon triggered some productive discussion about terms and their technical context in the fluid technology sector and among users. University research and standardisation have also contributed to the harmonisation and refinement of terms and definitions. For this reason in 1995 there was a 2nd revised edition with the joint authorship of Hans Ebertshäuser (who died in 1992) and Siegfried Helduser. Here in particular terms from the areas of measurement and control, microelectronics as well as electrohydraulic control technology were revised or added.

20 years after the publication of the 2nd edition, a renewed revision of the O+P technical glossary of fluid technology is necessary: Mechatronics, digital signal processing and new safety standards make the addition of numerous additional terms and definitions necessary to reflect the current state-of-the-art. From January 2015 this task was taken on by a team of authors at HAWE Hydraulik SE, Munich to provide a helpful reference work for fluid technology. The new edition will no longer be published as a printed book, but as an online version in German and English on the homepage of HAWE Hydraulik SE.

Übersicht Foreword
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Fork lift truck
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HST_S_4_D7650.cmyk.65x65
HST

Nomenclature:
Valve combination according to type
consisting of:

Design:
Valve bank

Actuation:
Solenoid

pmax:
bar

Qmax:
90 lpm

Lifting module and lifting/lowering valve type HST
HE_S_1_D71471.cmyk.100x100
H

Nomenclature:
Piston pump

Design:
Single acting hand pump
Double acting hand pump

pmax:
800 bar

Vstroke max :
30 cm3/stroke

Mini power unit type H 400, 410, 440
MPN_S4_3_D7207.cmyk.100x100
MP, MPW

Nomen- clature:
Radial piston and/or gear pump with integrated motor single or dual-circuit pump

Design:
Oil immersed hydraulic power pack
for intermittent or load/no load operation
(S2-/S3-/S6-service)

pmax:
Radial piston pump bar (high pressure), gear pump 220 bar (low pressure)

Qmax:
12.4 lpm (high pressure) (Vg = 9.17 cm3/rev) 83 lpm (low pressure) (Vg = 61 cm3/rev)

Vt max:
100 l

Compact hydraulic power pack type MP and MPW
MPN_S4_3_D7207.cmyk.100x100
MP, MPW

Nomen- clature:
Radial piston and/or gear pump with integrated motor single or dual-circuit pump

Design:
Oil immersed hydraulic power pack
for intermittent or load/no load operation
(S2-/S3-/S6-service)

pmax:
Radial piston pump bar (high pressure), gear pump 220 bar (low pressure)

Qmax:
12.4 lpm (high pressure) (Vg = 9.17 cm3/rev) 83 lpm (low pressure) (Vg = 61 cm3/rev)

Vt max:
100 l

Compact hydraulic power pack type MP and MPW
MPN_S4_3_D7207.cmyk.100x100
MP, MPW

Nomen- clature:
Radial piston and/or gear pump with integrated motor single or dual-circuit pump

Design:
Oil immersed hydraulic power pack
for intermittent or load/no load operation
(S2-/S3-/S6-service)

pmax:
Radial piston pump bar (high pressure), gear pump 220 bar (low pressure)

Qmax:
12.4 lpm (high pressure) (Vg = 9.17 cm3/rev) 83 lpm (low pressure) (Vg = 61 cm3/rev)

Vt max:
100 l

Compact hydraulic power pack type MP and MPW
MPN_S4_3_D7207.cmyk.100x100
MP, MPW

Nomen- clature:
Hydraulic power pack with built-in electric motor (AC or 3-phase version) and single-circuit or dual-circuit pump

Design:
Oil immersed compact hydraulic power pack for short period and intermittent operation and continuous run with intermittent load (S2, S3, S6)

pmax:
Radial piston pump 700 bar
Gear pump 220 bar

Qmax:
Radial piston pump
12.4 lpm (Vg = 9.17 cm3/U)
Gear pump
83 lpm (Vg = 61 cm3/U)

Vt max:
100 l

Compact hydraulic power pack type MP and MPW