157B4033 157B4116 157B4128 | Danfoss PVEH PVEM Proportional Actuator

Product Overview

The 157B4033, 157B4116, and 157B4128 are members of the Danfoss Power Solutions PVE Series 4 electro-hydraulic proportional actuator family. These actuators mount 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.

157B4033 is a PVEH (Proportional High) high-precision actuator, featuring closed-loop spool position control for applications with high performance requirements. 157B4116 and 157B4128 are PVEM (Proportional Medium) medium-precision actuators, utilizing open-loop PWM control for cost-sensitive applications with moderate accuracy requirements. 157B4116 is the 12V DC version, while 157B4128 is the 24V DC version—both share identical mounting interfaces and functional specifications, differing only in voltage rating.

Manufactured to strict Danfoss original specifications, these actuators deliver 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 actuators offer complete interchangeability—157B4033 is directly replaceable by 11166824 (Series 7) ; 157B4116 and 157B4128 are both directly replaceable by 11166829 (Series 7) —with no modifications to mounting interfaces or electrical connections required, significantly reducing equipment downtime and retrofitting costs.

Technical Specifications 

157B4033 — PVEH32 (High-Precision Proportional Actuator)

• Model Number: 157B4033

• Replacement Model: 11166824

• Brand Series: Danfoss Power Solutions PVE Series

• Actuator Type: PVEH32 (Proportional High — High-Precision Proportional Actuator)

• Compatible Valve Groups: Danfoss PVG32 / PVG100

• Series: Series 4 (S4)

• Voltage Range: 11 – 32 V DC

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

• Connector Type: 1×4 DIN 43650-A / ISO4400 (Hirschmann)

• Connector Direction: 90° (Up)

• Fault Monitoring: Passive Fault Monitoring

• Pilot Pressure: 13.5 bar

• Hysteresis: Approx. 4%

• Response Time (Forward/Backward) : 120 ms

• Coil Power: 8 W

• Protection Class: IP65

• Operating Temperature Range: -40°C to +85°C

• Filtration Requirement: ISO 4406 18/16/13

• Weight: Approx. 1.0 kg

• Product Status: Obsolete, replaced by 11166824

157B4116 — PVEM32 (Medium-Precision Proportional Actuator, 12V)

• Model Number: 157B4116

• Replacement Model: 11166829

• Brand Series: Danfoss Power Solutions PVE Series

• Actuator Type: PVEM32 (Proportional Medium — Medium-Precision Proportional Actuator)

• Compatible Valve Groups: Danfoss PVG32 / PVG100

• Series: Series 4 (S4)

• Voltage: 12 V DC

• Control Method: PWM Proportional Signal Control, Open-loop Control

• Connector Type: 1×4 DIN 43650-A / ISO4400 (Hirschmann)

• Fault Monitoring: Passive Fault Monitoring

• Pilot Pressure: 13.5 bar

• Hysteresis: Approx. 25–35%

• Protection Class: IP66

• Operating Temperature Range: -40°C to +85°C

• Filtration Requirement: ISO 4406 18/16/13

• Weight: Approx. 0.84 – 0.9 kg

• Product Status: Obsolete, replaced by 11166829

157B4128 — PVEM32 (Medium-Precision Proportional Actuator, 24V)

• Model Number: 157B4128

• Replacement Model: 11166829

• Brand Series: Danfoss Power Solutions PVE Series

• Actuator Type: PVEM32 (Proportional Medium — Medium-Precision Proportional Actuator)

• Compatible Valve Groups: Danfoss PVG32 / PVG100

• Series: Series 4 (S4)

• Voltage: 24 V DC

• Control Method: PWM Proportional Signal Control, Open-loop Control

• Connector Type: 1×4 DIN 43650-A / ISO4400 (Hirschmann)

• Fault Monitoring: Passive Fault Monitoring

• Pilot Pressure: 13.5 bar

• Hysteresis: Approx. 25–35%

• Protection Class: IP65 – IP66

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

• Filtration Requirement: ISO 4406 18/16/13

• Weight: Approx. 1.0 kg

• Product Status: Obsolete, replaced by 11166829

Key Technical Advantages

1. PVEH Closed-loop High-Precision Control for High-Performance Demands
The 157B4033 (PVEH32) employs an embedded micro-controller and built-in LVDT position sensor for closed-loop spool position control, with hysteresis as low as approx. 4% and response time of just 120 ms. PVEH is the standard choice within the PVE series for applications with high performance demands.

2. PVEM Economical Proportional Control for Medium-Precision Applications
The 157B4116 and 157B4128 (PVEM32) utilize open-loop PWM proportional control, delivering reliable proportional control with a more cost-effective solution. PVEM is the ideal choice within the PVE series for medium-precision, cost-sensitive applications.

3. Wide Voltage Range with Flexible Configurations for Diverse Systems
The PVEH series supports 11-32 V DC wide voltage input, compatible with both 12V and 24V systems. The PVEM series offers both 12V (157B4116) and 24V (157B4128) versions to accommodate different host equipment voltage platforms.

4. Standard DIN Connector for Easy Installation
The entire series features the 1×4 DIN 43650-A / ISO4400 (Hirschmann) standard connector, offering strong compatibility, easy installation, and convenient on-site replacement and maintenance.

5. Passive Fault Monitoring for Status Warning
The entire series is equipped with Passive Fault Monitoring, continuously monitoring input signal status. When an anomaly is detected, the LED indicator provides visual feedback. 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.

6. High Ingress Protection for Demanding Environments
Achieving IP65 to IP66 protection ratings, the actuators effectively resist dust, oil mist, and water spray. With a wide operating temperature range of -40°C to +90°C, they are ideal for demanding outdoor applications in construction and agricultural machinery.

7. Complete Interchangeability with Seamless S4-to-S7 Upgrade Path
157B4033 is directly replaceable by 11166824; 157B4116 and 157B4128 are both directly replaceable by 11166829. Old and new models share identical mounting interfaces, electrical connections, and functional specifications. The Series 7 versions offer further improvements in environmental durability, EMC robustness, and installation convenience.

Application Areas

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

• Agricultural Machinery: Combine harvesters, tractors (JCB, CLAAS, etc.) — hydraulic actuator proportional control

• Material Handling Equipment: Forklifts, telescopic handlers (Manitou, etc.) — hydraulic systems

• Industrial Hydraulic Systems: Injection molding machines, presses, test benches — proportional directional control

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

• Specialized Vehicles: Truck-mounted cranes, aerial work platforms — hydraulic proportional control

Expert Maintenance Tips

1. Verify Model and Replacement Status — Critical Step
157B4033 is a Series 4 product and has been officially discontinued, replaced by 11166824 (Series 7) . 157B4116 and 157B4128 are both Series 4 products and have been officially discontinued, both replaced by 11166829 (Series 7) . Old and new models are fully compatible in mounting interfaces and electrical specifications. Series 7 versions offer better environmental durability and diagnostic capability—11166824 and 11166829 are recommended for new purchases or replacements.

2. Connector Type Verification
The entire series uses 1×4 DIN 43650-A / ISO4400 (Hirschmann) standard connectors. Before installation, confirm that the mating connector on your valve group matches this type. Hirschmann (DIN) connectors are NOT interchangeable with Deutsch or AMP connectors.

3. Voltage Specification Verification — Critical for PVEM Selection
157B4116 is the 12V DC version; 157B4128 is the 24V DC version. While they share identical appearance and mounting interfaces, the voltage specifications differ—ensure correct model selection based on your system supply voltage. The Series 7 replacement 11166829 supports 11-32V DC wide voltage input, capable of replacing both 12V and 24V versions.

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 and response performance.

5. Pilot Pressure Verification
PVE series actuators require a pilot pressure of 13.5 bar (196 psi) for normal operation. Ensure the system provides stable pilot pressure above this value—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. The entire series features Passive Fault Monitoring—during commissioning, observe the LED status indicator to confirm proper actuator and valve group operation.