Product Overview
The PVEM series electro-hydraulic proportional actuators are core members of the Danfoss PVE actuator family. The PVEM is a medium-performance proportional control actuator featuring a closed-loop control architecture with an embedded LVDT position sensor providing real-time spool position feedback. A micro-controller processes the signal voltage and feedback signal to precisely regulate solenoid valves that drive the main spool. The PVEM offers 12-step proportional resolution, making it a cost-effective solution for work functions with medium performance requirements within PVG proportional valve groups.
The PVEM actuator employs 2-solenoid valve bridge technology with a new patented 3-way logic design, offering a simple and robust structure. All proportional PVEM variants feature closed-loop spool control and continuous fault monitoring. Three performance variants are available: standard PVEM, PVEM-R (with ramp function), and PVEM-Q (quick reaction).
This product offers a complete range of PVEM series electro-hydraulic actuators—including models 157B4033 (PVEH 11-32V PASS) , 157B4528 (PVEM 24V Ramp) , 157B4616 (PVEM 12V) , and 157B4516 (PVEM 12V Ramp) —as direct drop-in replacement alternatives for original Danfoss PVE actuators. All actuators are manufactured to strict OEM specifications and undergo 100% real-world condition simulated testing, ensuring seamless integration with existing systems without any modification required.
Core Value Proposition:
Direct Interchangeability: Full dimensional, interface, and electrical compatibility with original Danfoss PVE actuators
100% Simulated Condition Testing: Complete validation of response characteristics and functionality under actual operating parameters prior to shipment
Closed-Loop Proportional Control: 12-step resolution for medium-performance applications
11-32V Wide Voltage Range: Compatible with both 12V and 24V mainstream vehicle power systems
Ramp Function (PVEM-R) : Provides smooth flow transitions, reducing hydraulic shock
Technical Specifications
Valve Family Compatibility
Actuator Type
Supply Voltage
157B4033 (PVEH) : 11-32 VDC
157B4528 (PVEM 24V) : 24 VDC
157B4616 (PVEM 12V) : 12 VDC
157B4516 (PVEM 12V) : 12 VDC
Control Signal
Analog voltage proportional signal (Ratiometric)
Neutral: Uₛ = 0.5 × U_DC (50% DUT)
P→A direction: Uₛ = 0.5 to 0.25 × U_DC (50% to 25% DUT)
P→B direction: Uₛ = 0.5 to 0.75 × U_DC (50% to 75% DUT)
Current Consumption
157B4528 @ 24V: 0.33 A
157B4616 @ 12V: Typical
Recommended PWM Frequency
Pilot Pressure
Proportional Resolution (PVEM)
Hysteresis (PVEH 157B4033)
Protection Class
Operating Temperature Range
Electrical Connection
Coil Power (PVEH 157B4033)
Response Time (PVEH 157B4033)
Max Oil Consumption (PVEH 157B4033)
Weight
Approx. 1.0 kg
157B4033: 1 kg
Certifications
CE, EAC
ISO13849 compliant
157B Series Model List
157B4033: PVEH electro-hydraulic actuator, 11-32V PASS
Type: PVEH (high-performance proportional control)
Series: Series 4
Fault monitoring: Passive
Connector: 1×4 DIN 43650-A / ISO4400
Hysteresis: 4%
Superseded by 11166824
157B4528: PVEM electro-hydraulic actuator, 24V Ramp
157B4616: PVEM electro-hydraulic actuator, 12V
157B4516: PVEM electro-hydraulic actuator, 12V Ramp
Key Technical Advantages
1. Closed-Loop Proportional Control — 12-Step Medium-Performance Precision Regulation
The PVEM actuator employs a closed-loop control architecture with an embedded LVDT position sensor providing real-time spool position feedback. An embedded micro-controller processes the signal voltage and feedback signal, precisely regulating solenoid valves to drive the main spool. The PVEM offers 12-step proportional resolution, delivering precise linear correspondence between electrical command signals and spool displacement for medium-performance flow regulation applications. The 157B4033 (PVEH) offers 4% low hysteresis and high-performance proportional control.
2. Ramp Function (PVEM-R) — Smooth Flow Transitions, Reducing Hydraulic Shock
Models 157B4528 and 157B4516 are PVEM-R (with ramp function) variants. The ramp function enables the actuator to gradually adjust spool position at a controlled rate when command signal changes occur, rather than step-change abrupt transitions. This design effectively prevents hydraulic shock caused by sudden flow changes, protecting system piping and actuators—particularly critical for applications requiring smooth start-up and stopping.
3. 11-32V Wide Voltage Multi-Voltage Power Supply
PVEM actuators support an 11-32V DC wide input voltage range, allowing a single actuator to accommodate both 12V and 24V mainstream vehicle power systems. 157B4033 is a 11-32V wide-voltage version, 157B4528 is a 24V version, while 157B4616 and 157B4516 are 12V versions. The wide voltage design greatly simplifies spare parts management and significantly reduces inventory costs and selection complexity.
4. Passive Fault Monitoring with LED Status Indication
PVEM actuators feature passive fault monitoring. When abnormal operating conditions are detected, the actuator signals faults to operators or control systems via the LED indicator. This design enables rapid problem localization and enhances system maintainability.
5. Rugged IP65 Protection and Extreme Environmental Tolerance
PVEM actuators feature IP65 protection, effectively resisting dust ingress and low-pressure water jets. The operating temperature range spans -40°C to +90°C, ensuring reliable electrical performance and mechanical actuation under extreme cold, high-temperature, and challenging conditions.
6. Standardized Interface and Quick Replacement Capability
The PVEM series features the 1×4 DIN 43650-A / ISO4400 (Hirschmann) standardized electrical interface, with 90° upward connector orientation for convenient cable routing in compact valve stack spaces. Unified Danfoss PVE series mechanical mounting dimensions enable actuator replacement within minutes.
Application Areas
Mobile Cranes and Knuckle Boom Cranes: Medium-precision proportional control for boom and telescopic functions
Aerial Work Platforms: Smooth proportional regulation of boom movements
Agricultural Machinery: Electro-hydraulic proportional drive for tractor hydraulic hitch systems and combine harvester working mechanisms
Material Handling Equipment: Hydraulic system flow distribution for forklifts and reach stackers
Construction Equipment: Proportional control for attachment hydraulic tools on excavators and loaders
Industrial Hydraulic Systems: Electronic control drive for medium-precision proportional valves on stationary equipment
Industrial Automation and Electro-Hydraulic Positioning Systems
Expert Maintenance Tips
1. Model Confirmation and Replacement Relationships
The PVEM series has undergone multiple generational changes (Series 4 → Series 7). Before installation, confirm the replacement relationship for your specific model:
157B4033 has been superseded by 11166824
157B4528 has been superseded by 11166845
157B4616 has been superseded by 11166853
157B4516 has been superseded by 11166845
It is recommended to select the latest code models for long-term supply availability and after-sales support.
2. Electrical Connection Inspection
Prior to installation, verify that the connector type matches your system wiring harness—all models feature the 1×4 DIN 43650-A / ISO4400 (Hirschmann) connector. Ensure the locking mechanism is fully engaged during connection to prevent loosening due to vibration.
3. Pilot Pressure Verification
PVEM actuators require a stable pilot oil supply pressure for proper operation. Standard PVE actuators require a nominal pilot pressure of 13.5 bar. IMPORTANT: Standard PVE electrical modules CANNOT operate at 25 bar pilot pressure! Verify that system pilot pressure meets actuator specifications before installation.
4. Supply Voltage and PWM Signal Verification
157B4033 (11-32V wide voltage): Verify voltage is within 11-32V range
157B4528 (24V version): Verify voltage is within 22-30V range
157B4616 / 157B4516 (12V versions): Verify voltage is within 11-15V range
Recommended PWM frequency > 200 Hz with voltage ripple not exceeding 5%
5. Proportional Resolution and Performance Expectations
PVEM offers 12-step proportional resolution. For applications requiring higher control precision (e.g., high-precision closed-loop control), PVEA or PVEH series actuators are recommended. 157B4033 (PVEH) offers 4% low hysteresis and 120 ms response time, suitable for applications with higher dynamic requirements.
6. Contamination Prevention During Replacement
When replacing a PVEM actuator, observe the following precautions:
Thoroughly clean the area around the actuator before removal
Immediately seal ports with clean plugs after removal to prevent contaminant entry into the hydraulic system
Verify O-ring seals are intact before installing the new actuator
Prevent foreign objects from falling onto the mounting surface during installation
Tighten mounting screws diagonally to specified torque
7. Spare Parts Strategy
It is recommended to keep 1-2 commonly used actuator models as on-hand spares. Thanks to the modular PVEM actuator design, faulty units can be replaced quickly during short service interruptions. It is advisable to stock the latest code models (11166824, 11166845, 11166853).
