Product Description
Product Overview
The PVEM32 series electro-hydraulic proportional actuators are proportional electro-hydraulic actuators engineered by Danfoss for the PVG32/PVG100 proportional valve groups. As part of the Danfoss PVE actuator family, these actuators are the core electronic control components of the PVG modular proportional valve system, widely used for proportional hydraulic control in construction machinery, agricultural equipment, and material handling applications.
The PVEM32 actuator is a closed-loop proportional actuator primarily used for controlling medium power requirement work functions. Its core architecture includes a built-in microcontroller that processes the signal voltage and LVDT (Linear Variable Differential Transformer) feedback signal to regulate the solenoid valves accordingly.
This product range covers the following models and configurations:
11166829 (PVEM32 S7 Standard) : Series 7 standard PVEM actuator, 11–32V DC, 1×4 DIN/Hirschmann connector, passive fault monitoring, replaces 157B4116 and 157B4128
157B4128 (PVEM32 24V DC, obsolete) : 24V DC PVEM actuator, fully replaced by 11166829
11166852 (PVEM32-FLB) : PVEM actuator with B-port float (swimming position) function
11166853 (PVEM32-Q) : Quick Reaction dynamic version with optimized response time
Our complete range of Danfoss PVEM32 actuators strictly adheres to OEM technical standards, achieving 100% direct interchangeability with original components. Every unit undergoes 100% simulated operating condition bench testing prior to shipment, ensuring performance parameters are fully consistent with genuine Danfoss products. Direct replacement significantly reduces equipment downtime and maintenance costs.
Technical Specifications
PVEM32 Series General Specifications
Product Series: Danfoss PVEM32 electro-hydraulic proportional actuator
Product Type: Closed-loop proportional electro-hydraulic actuator
Brand: Danfoss
Compatible Valve Groups: PVG32 / PVG100 proportional valve groups
Supply Voltage Range: 11 – 32 V DC (compatible with 12V and 24V systems)
Nominal Voltage: 12/24 V DC
Connector Type: 1×4 DIN / Hirschmann
Ingress Protection: IP65
Standard Pilot Pressure: 13.5 bar (196 psi)
Minimum Pilot Pressure: 10.0 bar (145 psi)
Operating Temperature Range: -40°C to +90°C
Recommended Cleanliness: ISO 4406 Code 23/19/16
Recommended Oil Viscosity: 12 – 75 cSt
Weight (11166829) : Approx. 1.00 – 1.03 kg
Weight (11166852) : Approx. 1.02 kg
Packing Size (11166829) : 19 × 14 × 6 cm
Model Function Overview
11166829 (PVEM Standard) : Standard PVEM actuator for medium proportional control of most conventional work functions
11166852 (PVEM-FLB) : Features B-port float (swimming position) function for applications requiring float control (e.g., bucket float, floating cylinders)
11166853 (PVEM-Q) : Quick Reaction dynamic version with optimized response time for demanding dynamic performance applications
Key Technical Advantages
1. Closed-Loop Proportional Control for Precise Spool Positioning
The PVEM32 is a closed-loop proportional actuator. An integrated LVDT (Linear Variable Differential Transformer) provides real-time spool position feedback. The built-in microcontroller compares the command signal with the LVDT feedback signal and regulates the solenoid valves accordingly, ensuring precise spool-to-command correspondence. Compared to open-loop actuators, closed-loop control delivers higher precision, better repeatability, and superior disturbance rejection.
2. Wide Voltage Range for Diverse Vehicle Electrical Systems
The PVEM32 supports a wide voltage range of 11–32 V DC, compatible with both 12V and 24V electrical systems. Whether on 12V-powered compact equipment or 24V-powered heavy machinery, the PVEM32 can be installed directly without additional voltage conversion modules.
3. Multiple Function Versions for Flexible Application Adaptation
The PVEM32 series offers multiple function versions:
Standard (11166829) : Suitable for most conventional proportional control requirements
FLB Float (11166852) : Features B-port float function for applications requiring float control
Q Quick Reaction (11166853) : Optimized response time for demanding dynamic performance applications
4. Passive Fault Monitoring with LED Fault Indication
The PVEM32 features passive fault monitoring with an LED fault display and a fault output pin. When a fault is detected, the LED illuminates and provides a fault output signal, greatly facilitating on-site fault diagnosis and troubleshooting.
5. Energy-Saving Circuit for Reduced Power Consumption and Heat Generation
The PVEM32 incorporates an energy-saving circuit. Once the spool reaches the target position, the actuator automatically reduces the holding current, significantly reducing power consumption and coil heating while maintaining position accuracy, extending the service life of both the actuator and the solenoid valves.
6. Rugged Construction for Harsh Operating Conditions
The PVEM32 offers IP65 ingress protectionand an operating temperature range of -40°C to +90°C, suitable for high-vibration, high-shock, wide-temperature harsh environments in construction machinery. Recommended cleanliness is ISO 4406 Code 23/19/16.
7. 100% Direct Interchangeability and Simulated Condition Testing
The PVEM32 strictly adheres to Danfoss original mounting dimensions and interface standards (1×4 DIN/Hirschmann connector), enabling direct drop-in replacement of original actuators without valve group modification or system adjustment. Every unit undergoes 100% simulated operating condition bench testing prior to shipment.
Application Areas
Construction Machinery: Proportional hydraulic control for excavators, wheel loaders, motor graders, road rollers
Agricultural Machinery: Proportional hydraulic control for large tractors and combines
Material Handling Equipment: Proportional hydraulic control for forklifts, reach stackers, telescopic handlers
Road Construction Equipment: Proportional hydraulic control for pavers and milling machines
Forestry Machinery: Proportional hydraulic control for harvesters and skidders
Mining Equipment: Proportional hydraulic control for underground LHDs and mining trucks
Expert Maintenance Tips
1. Verify Model and Function Compatibility Prior to Installation
The PVEM32 series offers three function versions: Standard (11166829), FLB Float (11166852), and Q Quick Reaction (11166853). Confirm that the selected model’s function matches system control requirements—FLB type for float control applications, Q type for fast response applications. 157B4128 has been fully replaced by 11166829—do not specify the obsolete model for new builds.
2. Electrical Connection Precautions
The PVEM32 features a 1×4 DIN/Hirschmann connector with a supply voltage range of 11–32 V DC. Confirm prior to wiring:
Supply voltage is within allowable range (11–32V)
Controller output signal type matches the actuator
Polarity is correct
3. Pilot Pressure Requirements
The PVEM32 requires a stable pilot oil source. Standard pilot pressure is 13.5 bar (196 psi) , with a minimum of 10.0 bar (145 psi) . Insufficient pilot pressure will result in actuator malfunction or degraded control accuracy.
4. Oil Cleanliness Management
The PVEM32 is a precision proportional actuator demanding adequate oil cleanliness. Recommended system cleanliness: ISO 4406 Code 23/19/16 or higher. Recommended oil viscosity: 12–75 cSt. Install high-precision filters (filtration rating ≤10μm) in the system return line and inspect filter elements regularly.
5. Installation Torque and Sealing
Use a torque wrench to tighten mounting bolts to the values specified in Danfoss technical manuals. Use OEM-specification O-rings for sealing (Seal Kit 157B4997). Do not apply excessive sealant, as sealant debris may enter the valve body.
6. Fault Diagnosis
The PVEM32 features passive fault monitoring with LED fault indication. When a fault occurs:
The LED illuminates to indicate fault status
The fault output pin provides an electrical signal
Refer to the Danfoss PVG32 Technical Information manual for fault code interpretation and troubleshooting
7. Periodic Maintenance and Inspection
Perform functional checks every 2,000 operating hours or annually: verify linearity between control signal and spool displacement, response time testing, and leakage inspection. If sluggish response, non-linear behavior, or increased leakage is observed, arrange for servicing or replacement.
8. Obsolete Model Replacement Information
157B4128: Replaced by 11166829 (PVEM32 S7 Standard)
157B4116: Replaced by 11166829 (PVEM32 S7 Standard)
157B4228 (PVEO32): Replaced by 11166743
Select the replacement models for retrofit applications to ensure long-term product availability
157B4228 is mostly an electrical control module for proportional valves in hydraulic systems, often adapted to precise control scenarios in medium and high-pressure hydraulic circuits. The following is a comprehensive description of this model and its affiliated series:
Model Analysis
157B: The core identification of the series, used to define the product group to which this electronic control module belongs, is a key code that distinguishes it from other series of hydraulic control accessories, and is suitable for specific specifications of proportional valve series.
4228: It is a specific specification code, used to distinguish the submodels of the same series with different adaptation parameters, control accuracy and interface types. It can precisely match the electrical control requirements of the corresponding model proportional valve, and at the same time facilitate the traceability of production batches and the matching of spare parts.
Core attribute
It belongs to the special electrical control module for hydraulic proportional valves in terms of type. The materials are mostly flame-retardant engineering plastics with high temperature and corrosion resistance and metal connectors with stable electrical conductivity to ensure stable electrical performance.
The high-pressure hydraulic system can adapt to a pressure of up to 400bar, and the working temperature adaptation range is usually from -10 ℃ to 70℃, which can adapt to the harsh working environment of most industrial and construction machinery.
It has good compatibility and anti-interference ability, and can form precise signal linkage with the corresponding proportional valve. The output signal has high linearity, ensuring the stability of hydraulic control.
Function and Role
Core function: Receive external control signals and convert them into electrical signals suitable for the proportional valve, control the movement amplitude of the proportional electromagnet, and thereby adjust the valve core opening degree of the proportional valve to achieve stepless and precise regulation of the hydraulic oil flow and pressure. Meanwhile, some models are equipped with signal feedback functions, which can transmit the working status data in real time.
Main function: As the control core component of the proportional valve, it ensures the smoothness and accuracy of the hydraulic system’s operation, avoiding equipment operation jamming or shock caused by sudden changes in hydraulic parameters. In emergency conditions, it can be coordinated with mechanical emergency structures to ensure the basic functions of the hydraulic circuit and enhance the safety of system operation.
Working principle
After the electrical signals (such as voltage or current signals) sent by the external control system are transmitted to this module, the signal processing unit inside the module amplifies, filters and other processes the signals, converting them into drive signals that can be recognized by the proportional electromagnet. The drive signal controls the proportional electromagnet to generate an electromagnetic force of corresponding intensity, pushing the valve core of the proportional valve to the corresponding position, thereby changing the flow channel and opening degree of the hydraulic oil, and achieving the regulation of flow and pressure. Meanwhile, the module receives the feedback signal from the valve core position, forming a closed-loop control to ensure that the actual output is consistent with the control instructions.
Installation Precautions
The installation position should be close to the compatible proportional valve to shorten the wiring distance, reduce signal attenuation and interference. At the same time, it should be avoided to be installed at the place with the strongest vibration of the equipment. Buffer pads can be added to reduce the damage to the internal components of the module caused by vibration.
When wiring, it is necessary to check the positive and negative poles and the signal interface. Operate strictly in accordance with the wiring instructions. The interface should be fixed with a waterproof sealed joint to prevent dust and hydraulic oil from seeping in and causing a short circuit. After wiring is completed, the joint nuts should be tightened.
Before installation, it is necessary to clean the impurities at the module interface and check whether the connectors are intact. If there is oxidation or damage, they should be replaced in time to avoid poor contact affecting signal transmission.
After installation, no-load debugging is required to test whether the signal transmission is smooth and whether the control actions are precise. Only after there are no abnormalities can it be connected to the load for operation.
Application scenarios and models used
Application scenarios: Widely used in mining operation areas, construction sites, road construction sites, ship decks, oil extraction platforms and other scenarios, especially suitable for harsh working conditions that require high pressure and precise hydraulic control, and can withstand complex environments such as dust and humidity.
The types of equipment used: Commonly found in hydraulic excavators, rotary drilling RIGS, shield machines, asphalt pavers, milling machines, mine boring machines, ship deck cranes, hydraulic rollers, ceramic and building materials presses, and other devices that rely on high-pressure proportional hydraulic systems.
A complete list of models in the 157B series
This series of models are all compatible with specific specifications of hydraulic proportional valves. Common complete models include 157B4228, 157B4028, 157B4128, 157B4428, 157B4328, 157B4528, 157B4628, 157B4728, 157B4828, and 157B4928. These models only differ in the suffix numbers and are respectively adapted to proportional valves with different parameters, which can meet the control requirements of hydraulic systems of different equipment.Conventional models compatible with multiple types of proportional valves
157B4032, 157B4033, 157B4086, 157B4088, 157B4116, 157B4128, 157B4172, 157B4216, 157B4217, 157B4227, 157B4228, 157B4229, 157B4266, 157 B4268, 157B4272, 157B4278, 157B4296, 157B4316, 157B4332, 157B4416, 157B4428, 157B4476, 157B4516, 157B4528, 157B4616, 157B4628, 157B47 16, 157B4728, 157B4775, 157B4816, 157B4828, 157B4832, 157B4834, 157B4835, 157B3171.
A dedicated model compatible with the pump-side module
This type of number is mostly suitable for scenarios related to proportional control on the pump side. Common ones include 157B5000, 157B5001, 157B5010, 157B5012, 157B5100, 157B5101, 157B5110, 157B5111, 157B5113, 157B5200, 157B5201, 157B5210, 157B5211, 157 B5212, 157B5213, 157B5300, 157B5301, 157B5310, 157B5311, 157B5313, 157B5391, 157B5912, 157B6030.
Model Analysis
157B: The core identification of the series, used to define the product group to which this electronic control module belongs, is a key code that distinguishes it from other series of hydraulic control accessories, and is suitable for specific specifications of proportional valve series.
4228: It is a specific specification code, used to distinguish the submodels of the same series with different adaptation parameters, control accuracy and interface types. It can precisely match the electrical control requirements of the corresponding model proportional valve, and at the same time facilitate the traceability of production batches and the matching of spare parts.
Core attribute
It belongs to the special electrical control module for hydraulic proportional valves in terms of type. The materials are mostly flame-retardant engineering plastics with high temperature and corrosion resistance and metal connectors with stable electrical conductivity to ensure stable electrical performance.
The high-pressure hydraulic system can adapt to a pressure of up to 400bar, and the working temperature adaptation range is usually from -10 ℃ to 70℃, which can adapt to the harsh working environment of most industrial and construction machinery.
It has good compatibility and anti-interference ability, and can form precise signal linkage with the corresponding proportional valve. The output signal has high linearity, ensuring the stability of hydraulic control.
Function and Role
Core function: Receive external control signals and convert them into electrical signals suitable for the proportional valve, control the movement amplitude of the proportional electromagnet, and thereby adjust the valve core opening degree of the proportional valve to achieve stepless and precise regulation of the hydraulic oil flow and pressure. Meanwhile, some models are equipped with signal feedback functions, which can transmit the working status data in real time.
Main function: As the control core component of the proportional valve, it ensures the smoothness and accuracy of the hydraulic system’s operation, avoiding equipment operation jamming or shock caused by sudden changes in hydraulic parameters. In emergency conditions, it can be coordinated with mechanical emergency structures to ensure the basic functions of the hydraulic circuit and enhance the safety of system operation.
Working principle
After the electrical signals (such as voltage or current signals) sent by the external control system are transmitted to this module, the signal processing unit inside the module amplifies, filters and other processes the signals, converting them into drive signals that can be recognized by the proportional electromagnet. The drive signal controls the proportional electromagnet to generate an electromagnetic force of corresponding intensity, pushing the valve core of the proportional valve to the corresponding position, thereby changing the flow channel and opening degree of the hydraulic oil, and achieving the regulation of flow and pressure. Meanwhile, the module receives the feedback signal from the valve core position, forming a closed-loop control to ensure that the actual output is consistent with the control instructions.
Installation Precautions
The installation position should be close to the compatible proportional valve to shorten the wiring distance, reduce signal attenuation and interference. At the same time, it should be avoided to be installed at the place with the strongest vibration of the equipment. Buffer pads can be added to reduce the damage to the internal components of the module caused by vibration.
When wiring, it is necessary to check the positive and negative poles and the signal interface. Operate strictly in accordance with the wiring instructions. The interface should be fixed with a waterproof sealed joint to prevent dust and hydraulic oil from seeping in and causing a short circuit. After wiring is completed, the joint nuts should be tightened.
Before installation, it is necessary to clean the impurities at the module interface and check whether the connectors are intact. If there is oxidation or damage, they should be replaced in time to avoid poor contact affecting signal transmission.
After installation, no-load debugging is required to test whether the signal transmission is smooth and whether the control actions are precise. Only after there are no abnormalities can it be connected to the load for operation.
Application scenarios and models used
Application scenarios: Widely used in mining operation areas, construction sites, road construction sites, ship decks, oil extraction platforms and other scenarios, especially suitable for harsh working conditions that require high pressure and precise hydraulic control, and can withstand complex environments such as dust and humidity.
The types of equipment used: Commonly found in hydraulic excavators, rotary drilling RIGS, shield machines, asphalt pavers, milling machines, mine boring machines, ship deck cranes, hydraulic rollers, ceramic and building materials presses, and other devices that rely on high-pressure proportional hydraulic systems.
A complete list of models in the 157B series
This series of models are all compatible with specific specifications of hydraulic proportional valves. Common complete models include 157B4228, 157B4028, 157B4128, 157B4428, 157B4328, 157B4528, 157B4628, 157B4728, 157B4828, and 157B4928. These models only differ in the suffix numbers and are respectively adapted to proportional valves with different parameters, which can meet the control requirements of hydraulic systems of different equipment.Conventional models compatible with multiple types of proportional valves
157B4032, 157B4033, 157B4086, 157B4088, 157B4116, 157B4128, 157B4172, 157B4216, 157B4217, 157B4227, 157B4228, 157B4229, 157B4266, 157 B4268, 157B4272, 157B4278, 157B4296, 157B4316, 157B4332, 157B4416, 157B4428, 157B4476, 157B4516, 157B4528, 157B4616, 157B4628, 157B47 16, 157B4728, 157B4775, 157B4816, 157B4828, 157B4832, 157B4834, 157B4835, 157B3171.
A dedicated model compatible with the pump-side module
This type of number is mostly suitable for scenarios related to proportional control on the pump side. Common ones include 157B5000, 157B5001, 157B5010, 157B5012, 157B5100, 157B5101, 157B5110, 157B5111, 157B5113, 157B5200, 157B5201, 157B5210, 157B5211, 157 B5212, 157B5213, 157B5300, 157B5301, 157B5310, 157B5311, 157B5313, 157B5391, 157B5912, 157B6030.
Company Profile
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If you encounter any problem during use, please contact your sales manager or our support team at any time.
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