157B4835 | Danfoss PVES Proportional Actuator 11-32V PVG32

Product Overview

The 157B4835 is a PVES (Proportional Valve Actuator Super) electro-hydraulic proportional actuator from Danfoss Power Solutions’ PVE Series 4 product line. This actuator mounts directly onto Danfoss PVG32 and PVG100 proportional valve groups, converting electrical input signals into pilot pressure to precisely control main spool displacement for proportional flow control.

PVES is the highest-precision actuator variant in the PVE series, featuring closed-loop spool position control and primarily used for work functions with very high performance requirements. The 157B4835 is equipped with a 1×4 AMP connector and features Passive Fault Monitoring.

Manufactured to strict Danfoss original specifications, this actuator delivers consistent performance in material quality, machining precision, sealing integrity, and factory testing. Every unit undergoes 100% full-load simulation testing prior to shipment, validating pressure, flow, and directional cycling performance under real-world operating conditions. The actuator offers complete interchangeability—157B4835 is directly replaceable by 11166859 (Series 7) —with no modifications to mounting interfaces or electrical connections required, significantly reducing equipment downtime and retrofitting costs.

⚠️ Important Note: 157B4835 is a Series 4 (S4) product and has been replaced by the Series 7 (S7) version 11166859. The S7 series offers significant improvements in environmental durability (-40°C to +90°C), diagnostic coverage (dual demodulator spool position monitoring), EMC robustness, and installation convenience. 11166859 is recommended for new purchases or replacements.

Technical Specifications 

157B4835 (Old Model / Series 4)

• Model Number: 157B4835

• Replacement Model: 11166859

• Brand Series: Danfoss Power Solutions PVE Series

• Actuator Type: PVES (Proportional Valve Actuator Super — Ultra-high precision proportional actuator)

• Compatible Valve Groups: Danfoss PVG32 / PVG100

• Series: Series 4 (S4)

• Voltage Range: 11 – 32 V DC

• Nominal Voltage: 12 VDC / 24 VDC

• Control Method: Analog Voltage Signal (Ratiometric), Closed-loop Spool Control

• Input Signal: Voltage Signal, 25–75% of supply voltage

• Connector Type: 1×4 AMP (AMP Junior Timer)

• Fault Monitoring: Passive Fault Monitoring

• Direction Indication (DI) : No

• Hydraulic Ramp: No

• Float Position: No

• EX Certification: No

• Pilot Pressure (Standard PVE) : 13.5 bar (196 psi)

• Pilot Pressure Range: 10.0 – 15.0 bar (145 – 218 psi)

• On-Stroke Response (Neutral → Max Spool Travel) : 120 ms

• De-Stroke Response (Max Spool Travel → Neutral) : 65 ms

• Hysteresis: < 1% (typical for PVES series)

• Coil Power: 8 W

• Protection Class: IP66

• Operating Temperature Range: -40°C to +90°C

• Hydraulic Fluid: Mineral-based hydraulic oil

• Filtration Requirement: ISO 4406 18/16/13

• Weight: Approx. 1.0 kg

• Product Status: Obsolete, replaced by 11166859

Key Technical Advantages

1. Closed-loop Spool Position Control for Ultra-high Precision
The PVES actuator employs an embedded micro-controller that continuously processes the input voltage signal and feedback from the built-in LVDT (Linear Variable Differential Transformer) position sensor, precisely regulating the pilot solenoid valves to control spool position. This closed-loop control architecture makes PVES the highest-precision actuator in the PVE series, with hysteresis as low as < 1%—ideal for applications with stringent control accuracy requirements.

2. Wide Voltage Range for 12V and 24V System Compatibility
Supporting 11-32 V DC wide voltage input, the actuator is compatible with both 12V and 24V vehicle and industrial power systems. Ratiometric signal control ensures stable output across all voltage conditions—a single actuator model serves multiple voltage platforms, significantly simplifying inventory management.

3. Passive Fault Monitoring for Status Warning
The 157B4835 features Passive Fault Monitoring, continuously monitoring input signal status. When an anomaly is detected, the LED indicator changes from green to red and the fault output pin goes high. Unlike Active Fault Monitoring, Passive Fault Monitoring does not disable the solenoid valves when an error is detected—the system continues to operate while providing a warning. Once the error is no longer registered, the system automatically “forgets” the error and resumes normal operation.

4. High Ingress Protection for Demanding Environments
Achieving IP66 protection rating, the actuator effectively resists dust, oil mist, water spray, and high-pressure washdown. With a wide operating temperature range of -40°C to +90°C, it is ideal for demanding outdoor applications in construction machinery, agricultural machinery, marine, and offshore equipment. The Series 7 replacement (11166859) offers further improvements in environmental durability, EMC robustness, and diagnostic capability.

5. Complete Interchangeability with Seamless S4-to-S7 Upgrade Path
157B4835 is directly replaceable by 11166859—old and new models share identical mounting interfaces, electrical connections, and functional specifications. The Series 7 version features an upgraded modular design for easier installation and faster replacement, enabling true “plug-and-play” upgrades.

Application Areas

• Mobile Construction Equipment: Excavators, loaders, cranes — implement proportional control

• Agricultural Machinery: Combine harvesters, tractors — hydraulic actuator proportional control

• Forestry Machinery: Harvesters, forwarders — proportional valve control

• Material Handling Equipment: Forklifts, aerial work platforms — hydraulic systems

• Marine & Offshore Equipment: Deck machinery, winches — hydraulic control

• Industrial Hydraulic Systems: Test equipment and test benches with stringent precision requirements

Expert Maintenance Tips

1. Verify Model and Replacement Status — Critical Step
157B4835 is a Series 4 product and has been officially discontinued, replaced by 11166859 (Series 7) . Old and new models are fully compatible in mounting interfaces and electrical specifications—direct interchangeability is guaranteed. 11166859 is recommended for new purchases or replacements.

2. Connector Type Verification
157B4835 / 11166859 use 1×4 AMP (AMP Junior Timer) connectors. Before installation, confirm that the mating connector on your valve group matches this type. AMP connectors are NOT interchangeable with Deutsch or Hirschmann (DIN) connectors.

3. Electrical Connection Verification
Before installation, confirm supply voltage is within 11-32 V DC range. The PVES actuator uses Ratiometric proportional voltage control—signal voltage ranges from 25–75% of supply voltage (neutral at 50%). Shielded cables are recommended to minimize electromagnetic interference on proportional control signals.

4. Fluid Cleanliness Management
PVE actuators require fluid cleanliness to ISO 4406 18/16/13. Install a filter with ≤10μm absolute filtration upstream of the PVG32 valve group and monitor fluid contamination regularly. Contaminants in the pilot oil directly affect spool control precision.

5. Pilot Pressure Verification
PVE series actuators require a pilot pressure of 13.5 bar (196 psi) for normal operation, with an allowable range of 10.0 – 15.0 bar. Ensure the system provides stable pilot pressure within this range—insufficient pilot pressure will result in incomplete spool shifting or delayed response.

6. First-Start Commissioning with Fault Monitoring Validation
Before initial system startup, perform an air-bleed cycle at reduced pressure. Apply a low voltage signal first (approximately 25% of supply voltage) to test actuator response, then gradually increase to the operating signal range (25-75% of supply voltage). The 157B4835 features Passive Fault Monitoring—during commissioning, observe the LED status indicator (green = normal / red = fault) to confirm proper actuator and valve group operation.