PVEA/PVEM Actuator 157B4775 157B4736 157B4737 157B4792 157B4128

Product Overview

The PVEA and PVEM series electro-hydraulic proportional actuators are two core members of the Danfoss PVE actuator family. The PVEA is a high-precision proportional control actuator featuring a closed-loop control architecture with an embedded 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, making it ideal for applications with demanding control accuracy requirements. The PVEM is a medium-performance proportional control actuator, also employing closed-loop control with 12-step proportional resolution for medium-performance applications.

This product offers a complete range of PVEA/PVEM series electro-hydraulic actuators—including models 157B4775 (PVEA 11-32V AMP PASS) , 157B4736 (PVEA-DI 11-32V AMP ACT) , 157B4737 (PVEA-DI 11-32V AMP PASS) , 157B4792 (PVEA 11-32V DEU ACT) , and 157B4128 (PVEM 24V DIN PASS) —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 fault monitoring under actual operating parameters prior to shipment

• PVEA High-Precision Proportional Control: Closed-loop architecture for precision flow regulation

• PVEM Medium-Performance Proportional Control: 12-step resolution for medium-performance applications

• 11-32V Wide Voltage Range: Compatible with both 12V and 24V mainstream vehicle power systems

Technical Specifications 

Valve Family Compatibility

• PVG32 / PVG100

Actuator Type

• PVEA: High-precision proportional control actuator (closed-loop)

• PVEM: Medium-performance proportional control actuator (closed-loop)

Supply Voltage

• 11-32 VDC (wide voltage range)

• 157B4128 (PVEM): 24 VDC

Control Signal

• Analog voltage proportional signal (Ratiometric)

• Recommended PWM frequency: > 1000 Hz

Input Impedance

• 12 kΩ

Pilot Pressure (Standard PVE)

• Nominal: 13.5 bar

Hysteresis

• 157B4792: 2.0%

• PVEA series: 2–6%

Resolution

• PVEA: High resolution

• PVEM: 12 steps

Coil Power

• 8 W

Response Time (157B4792)

• On-stroke A: 350 ms

• On-stroke B: 350 ms

• De-stroke A: 225 ms

• De-stroke B: 225 ms

Max Oil Consumption (Steady State)

• 0.4 L/min

Protection Class

• IP66 (PVEA series)

• IP67 (157B4792)

Operating Temperature Range

• -40°C to +90°C (estimated, based on PVE series general specifications)

Connector Type

• 157B4775: 1×4 AMP

• 157B4736: 2×4 AMP

• 157B4737: 2×4 AMP

• 157B4792: 1×4 Deutsch (DT04)

• 157B4128: 1×4 DIN 43650-A / ISO4400 (Hirschmann)

Connector Direction

• 90° (Up)

Weight

• 157B4775: approx. 0.9–1.0 kg

• 157B4736: 0.9 kg

• 157B4792: 1.007 kg

• 157B4128: approx. 1.0 kg

Certifications

• CE, EAC

• ISO13869 compliant

157B Series Model List

• 157B4775: PVEA electro-hydraulic actuator, 11-32V, 1×4 AMP connector, passive fault monitoring

  • Type: PVEA (high-precision proportional control)

  • Series: Series 4

  • Compatible with: PVG32

  • Protection: IP66

  • Superseded by 11177353

• 157B4736: PVEA-DI electro-hydraulic actuator, 11-32V, 2×4 AMP connector, active fault monitoring, with direction indication

  • Type: PVEA-DI (with direction indication)

  • Series: Series 4

  • Compatible with: PVG32

  • Protection: IP66

  • Superseded by 11177355

• 157B4737: PVEA-DI electro-hydraulic actuator, 11-32V, 2×4 AMP connector, passive fault monitoring, with direction indication

  • Type: PVEA-DI (with direction indication)

  • Series: Series 7 replacement

  • Compatible with: PVG32

  • Protection: IP66

  • Superseded by 11177356

• 157B4792: PVEA electro-hydraulic actuator, 11-32V, 1×4 Deutsch connector, active fault monitoring

  • Type: PVEA (high-precision proportional control)

  • Compatible with: PVG32

  • Protection: IP67

  • Hysteresis: 2.0%

  • Response time: On-stroke 350 ms / De-stroke 225 ms

  • Superseded by 11177347

• 157B4128: PVEM electro-hydraulic actuator, 24V DC, 1×4 DIN connector, passive fault monitoring

  • Type: PVEM (medium-performance proportional control)

  • Compatible with: PVG32

  • Voltage: 24V DC

  • Superseded by 11166829

Key Technical Advantages

1. High-Precision Closed-Loop Proportional Control
Both PVEA and PVEM actuators employ a closed-loop control architecture with an embedded 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 closed-loop design ensures precise linear correspondence between electronic control signals and spool displacement, delivering significantly improved spool positioning accuracy and repeatability. The PVEA series offers low hysteresis of 2–6%, with 157B4792 achieving an ultra-low 2.0% hysteresis—particularly critical for applications with stringent control accuracy requirements.

2. Flexible Fault Monitoring Options — Active and Passive Available
The PVEA series offers both Active Fault Monitoring and Passive Fault Monitoring options:

• Active (157B4736, 157B4792) : Continuously monitors actuator electrical status. Upon detecting anomalies (signal/supply voltage out of range, spool position error, etc.), the actuator automatically transmits fault signals.

• Passive (157B4775, 157B4737, 157B4128) : Displays error states via LED indicators, with diagnostic information read by the controller.
  Both options effectively enhance system safety and maintainability.

3. Multiple Connector Options and Installation Flexibility
The PVEA/PVEM series offers three mainstream connector options to accommodate different OEM wiring harness standards:

• AMP connector (157B4775: 1×4; 157B4736/157B4737: 2×4)

• Deutsch connector (157B4792: 1×4 DT04)

• DIN/Hirschmann connector (157B4128: 1×4 DIN 43650-A)
  The 90° upward connector orientation facilitates cable routing in compact valve stack spaces.

4. 11-32V Wide Voltage Multi-Voltage Power Supply
PVEA series actuators support an 11-32V DC wide input voltage range, allowing a single actuator to accommodate both 12V and 24V mainstream vehicle power systems. 157B4128 (PVEM) is a 24V rated version. The wide voltage design greatly simplifies spare parts management and significantly reduces inventory costs and selection complexity.

5. Rugged IP66/IP67 Protection and Extreme Environmental Tolerance
PVEA series actuators feature IP66 protection, with 157B4792 achieving IP67, effectively resisting dust ingress, high-pressure water jets, and short-term immersion. The operating temperature range spans -40°C to +90°C, with nominal pilot pressure of 13.5 bar, ensuring reliable electrical performance and mechanical actuation under extreme cold, high-temperature, and challenging conditions.

6. Standardized Interface and Quick Replacement Capability
PVEA/PVEM actuators feature unified Danfoss PVE series mechanical mounting dimensions with standardized electrical interfaces, enabling replacement within minutes without special tools, dramatically reducing equipment downtime.

Application Areas

• Mobile Cranes and Knuckle Boom Cranes: High-precision proportional control for boom, telescopic, and slewing functions

• Aerial Work Platforms: Smooth proportional regulation and precise positioning of boom movements

• Agricultural Machinery: Electro-hydraulic proportional drive for tractor hydraulic hitch systems and combine harvester working mechanisms

• Material Handling Equipment: Precise hydraulic system flow distribution for forklifts and reach stackers

• Construction Equipment: Fine proportional control for attachment hydraulic tools on excavators and loaders

• Marine and Offshore Engineering: Hydraulic proportional control for deck cranes, hatch covers, and winches

• Industrial Hydraulic Systems: Electronic control drive for high-precision proportional valves on stationary equipment

Expert Maintenance Tips

1. Model Confirmation and Replacement Relationships
The PVEA/PVEM series has undergone multiple generational changes. Before installation, confirm the replacement relationship for your specific model:

• 157B4775 has been superseded by 11177353

• 157B4736 has been superseded by 11177355

• 157B4737 has been superseded by 11177356

• 157B4792 has been superseded by 11177347

• 157B4128 has been superseded by 11166829
  It is recommended to select the latest code models for long-term supply availability and after-sales support.

2. Connector Type Confirmation
Prior to installation, verify that the actuator connector type matches your system wiring harness:

• 157B4775: 1×4 AMP

• 157B4736 / 157B4737: 2×4 AMP

• 157B4792: 1×4 Deutsch (DT04)

• 157B4128: 1×4 DIN 43650-A / ISO4400 (Hirschmann)
  Ensure the locking mechanism is fully engaged during connection to prevent loosening due to vibration.

3. Pilot Pressure Verification
PVEA/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 Verification

• PVEA series (11-32V wide voltage): Verify voltage is within 11-32V range with ripple not exceeding 5%

• 157B4128 (24V rated): Verify voltage is within 22-30V range

5. PWM Signal Requirements
PVEA/PVEM are proportional control actuators requiring PWM (Pulse Width Modulation) control signals. Recommended PWM frequency > 1000 Hz. Signal voltage mapping is as follows:

• 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)

6. Fault Monitoring Function Verification (Active Models)
157B4736 and 157B4792 are active fault monitoring models. After installation, verify that the fault monitoring function operates correctly: simulate fault conditions such as coil open circuit or signal anomalies to confirm the actuator can properly transmit fault signals to the controller.

7. Spare Parts Strategy
It is recommended to keep 1-2 commonly used actuator models as on-hand spares. Thanks to the modular PVEA/PVEM actuator design, faulty units can be replaced quickly during short service interruptions. It is advisable to stock the latest code models (11177353, 11177355, 11177356, 11177347, 11166829).