157B4088 Danfoss PVEH 24V Electro-Hydraulic Actuator

Product Overview

The Danfoss PVE Series 4 is an electro-hydraulic actuator platform designed to control the main spool of PVG proportional valve systems.

The three part numbers covered here are:

• 157B4088 — PVEH 24V
• 157B4128 — PVEM32 24V
• 157B4228 — PVEO32 24V

They should not be treated as identical products. The three configurations use different control architectures.

157B4088 is a PVEH 24V actuator and is currently discontinued by Danfoss, with 157B4033 listed as the recommended replacement.

157B4128 is a PVEM32 actuator using a ratiometric control signal, while 157B4228 is a PVEO32 actuator using ON/OFF control. Danfoss lists 11166829 and 11166743 respectively as recommended replacement products.

Danfoss documentation confirms that the PVE Series 4 platform can be used with PVG32, PVG100 and PVG120 systems. However, PVG120 requires a special interface arrangement and uses dedicated 155Gxxxx PVE codes.

For aftermarket replacement, the complete PVE code, connector, voltage, control type and PVG valve platform must therefore be verified before ordering.

Technical Specifications

157B4088 — PVEH 24V

• Manufacturer: Danfoss
• Product Type: PVEH Electro-Hydraulic Actuator
• Part Number: 157B4088
• Series: PVE Series 4
• Nominal Voltage: 24 V
• Control Type: Electro-Hydraulic Proportional Actuation
• Fault Monitoring: Active
• Connector Family: PVEH-S / 1×6 Deutsch configuration within the PVEH family
• Platform Compatibility: PVG32 / PVG100 / PVG120 family
• Product Status: Discontinued
• Recommended Replacement: 157B4033

Danfoss PowerSource identifies 157B4088 as PVEH 24V and explicitly lists 157B4033 as its recommended replacement.

157B4128 — PVEM32 24V

• Manufacturer: Danfoss
• Product Type: PVEM32 Electro-Hydraulic Actuator
• Part Number: 157B4128
• Series: PVE Series 4
• Supply Voltage: 24 V
• Control Signal: Ratiometric
• Pilot Pressure: 13.5 bar
• Connector: 1×4 DIN 43650-A / ISO 4400
• Connector Direction: 90° Up
• Hysteresis: 15.0%
• On-Stroke Response A: 350 ms
• On-Stroke Response B: 350 ms
• De-Stroke Reaction A: 90 ms
• De-Stroke Reaction B: 90 ms
• Resolution: 25
• Maximum Oil Consumption: 0 L/min
• Steady-State Oil Consumption: 0.4 L/min
• Nominal A Stroke: 7
• Nominal B Stroke: 7
• IP Rating: IP65
• Coil Power: 8 W
• Valve-Side Interface: PVE32 O-Ring
• Length: 106 mm
• Maximum System Pressure Peaks: 60 bar
• Certification: ISO 13849 compliant
• Marking: CE / EAC
• Product Status: Obsolete
• Recommended Replacement: 11166829

157B4228 — PVEO32 24V

• Manufacturer: Danfoss
• Product Type: PVEO32 Electro-Hydraulic Actuator
• Part Number: 157B4228
• Series: PVE Series 4
• Supply Voltage: 24 V
• Control Signal: ON/OFF
• Pilot Pressure: 13.5 bar
• Connector: 1×4 DIN 43650-A / ISO 4400
• Connector Direction: 90° Up
• On-Stroke Response A: 225 ms
• On-Stroke Response B: 225 ms
• De-Stroke Reaction A: 90 ms
• De-Stroke Reaction B: 90 ms
• Maximum Oil Consumption: 0 L/min
• Steady-State Oil Consumption: 0 L/min
• Nominal A Stroke: 7
• Nominal B Stroke: 7
• IP Rating: IP65
• Coil Power: 8 W
• Valve-Side Interface: PVE32 O-Ring
• Length: 106 mm
• Maximum System Pressure Peaks: 60 bar
• Certification: ISO 13849 compliant
• Marking: CE
• Product Status: Obsolete
• Recommended Replacement: 11166743

PVG120 Compatibility

Danfoss documentation confirms that PVE Series 4 is used with PVG32, PVG100 and PVG120 platforms.

However, the manufacturer’s code tables distinguish PVG120 from the standard PVG32/PVG100 PVE codes.

For PVG120, Danfoss specifies:

• PVEH Active, AMP: 155G4094
• PVEH Passive, AMP: 155G4095
• PVEO 12 V, AMP: 155G4282
• PVEO 24 V, AMP: 155G4284
• PVEH Active, Hirschmann/DIN: 155G4092
• PVEH Passive, Hirschmann/DIN: 155G4093
• PVEO 12 V, Hirschmann/DIN: 155G4272
• PVEO 24 V, Hirschmann/DIN: 155G4274

Therefore, a product page should not state that 157B4088, 157B4128 or 157B4228 are dedicated PVG120 PVE actuators without checking the actual valve interface and original actuator code.

Key Technical Advantages

Electro-Hydraulic Spool Control

PVE actuators combine an electronic subsystem with a hydraulic pilot stage to position the PVG main spool. This architecture allows an electrical command to control hydraulic flow through the PVG work section.

13.5 bar Pilot Pressure

The identified 157B4128 and 157B4228 units specify a 13.5 bar PVE pilot pressure. Correct pilot pressure is essential for achieving the intended main-spool stroke.

Ratiometric vs ON/OFF Control

The different control architectures are a major engineering distinction:

• 157B4128: Ratiometric control
• 157B4228: ON/OFF control

Therefore, the controller output type must match the actuator configuration. They are not interchangeable simply because both are 24 V, 1×4 DIN actuators.

Industrial Electrical Protection

The identified PVEM32 and PVEO32 configurations use IP65 protection, a 1×4 DIN 43650-A / ISO 4400 connector and an 8 W coil configuration.

Standardized PVG Integration

PVE Series 4 actuators are engineered as electrical actuation modules for Danfoss PVG systems rather than as stand-alone proportional valves. The architecture is therefore optimized around PVG spool control and pilot hydraulics.

Clear Replacement Cross-References

Official Danfoss replacement information provides useful aftermarket references:

• 157B4088 → 157B4033
• 157B4128 → 11166829
• 157B4228 → 11166743

Application Areas

Typical applications include:

• Construction Machinery
• Agricultural Machinery
• Forestry Equipment
• Material Handling Equipment
• Road Construction Machinery
• Excavators
• Loaders
• Tractors
• Harvesting Machinery
• Telehandlers
• Mobile Hydraulic Systems
• PVG32 Valve Systems
• PVG100 Valve Systems
• PVG120 Valve Systems

For PVG120 applications, the dedicated 155Gxxxx actuator code and special interface arrangement should be verified before replacement.

Expert Maintenance Tips

Verify the Complete Actuator Code

Do not identify the actuator solely by the PVE family name. Verify:

• Exact part number
• PVE type
• Supply voltage
• Connector
• Control signal
• PVG platform
• Mechanical interface

Do Not Substitute PVEM with PVEO Without Controller Verification

157B4128 is ratiometric, while 157B4228 is ON/OFF. A controller designed for one control architecture may not correctly operate the other.

Check Pilot Oil Conditions

Danfoss specifically warns that obstructions in the pilot-oil circuit can directly affect spool control. Reduced pilot pressure limits spool control, while excessive pilot pressure can damage the PVE.

Perform a Performance Test After Replacement

Danfoss requires performance verification after replacement of modules or cables. The test should verify wiring, actuator response and complete PVG operation rather than simply checking electrical continuity.

Use the Correct Operating Voltage

Danfoss states that operating the PVE below nominal voltage reduces PVG performance and that the PVE is not designed to operate outside its specified voltage conditions.

Check PVG120 Interface Geometry

For PVG120 installations, confirm the special interface plate and LVDT arrangement described by Danfoss before installing a Series 4 actuator. PVG120 uses a different mechanical arrangement from the standard PVG32/PVG100 PVE installation.

Recommended Replacement Strategy

For service procurement, use the manufacturer’s documented replacement path as the first reference:

157B4088 → 157B4033

157B4128 → 11166829

157B4228 → 11166743

Then verify the replacement against the complete PVG valve configuration before shipment.