I. Product Overview
This product series comprises electro-hydraulic actuators (PVE) and PVPX electric LS unloader valves for Danfoss (formerly Sauer-Danfoss) PVG32/PVG100 proportional valve groups, including PVEK, PVEO, PVEH, and PVEH-DI variants.
As the core electronic control component of PVG proportional valves, these actuators convert electrical control signals into precise hydraulic pilot pressure, enabling proportional control of the main spool stroke. Manufactured to strict Danfoss OEM standards, they offer 100% direct interchangeability with original parts—no modifications required for direct installation.
Every unit undergoes 100% application-condition simulation testing—comprehensive verification of pressure, flow, leakage, and response characteristics on dedicated test benches against published specifications. Perfect OEM replacement for Danfoss original parts, ideal for hydraulic system repairs and preventive maintenance.
II. Technical Specifications (Bulleted List)
157B4911 – PVEK Electro-Hydraulic Actuator (Without Direction Indication)
Model: 157B4911 (New code: 11177348)
Type: PVEK Series 3 electro-hydraulic actuator
Voltage: 12V DC
Power Consumption: 3.5W
Current Draw: 0.33A (12V) / 0.17A (24V)
Connector: Standard AMP 4-pin, IP66 rating
Control Signal: Analog (PWM)
Technology: Hybrid electronics, 2 NC solenoids + 2 orifices (0.6mm)
Weight: Approx. 0.70 kg
Dimensions (W×L×H): 0.11m × 0.04m × 0.10m
Compatibility: PVG32 proportional valve group
Fault Monitoring: None
157B4256 – PVPX Electric LS Unloader Valve
Model: 157B4256
Type: PVPX Electric Load Sensing Unloader Valve
Voltage: 12V DC
Function: Electric LS Unloader
Compatibility: PVG32 proportional valve group
Net Weight: 0.345 kg
Connector: 1×2 Deutsch, IP67 rating
157B4292 – PVEO Electro-Hydraulic Actuator (On/Off Type)
Model: 157B4292 (New code: 11166838)
Type: PVEO electro-hydraulic actuator, S4 series
Voltage: 24V DC
Connector: 1×4 Deutsch (DEU), IP67 rating
Control Type: On/Off (switching)
Compatibility: PVG32 and PVG100 proportional valves
Weight: Approx. 1.0 kg
157B4093 / 11166732 – PVEH32 Electro-Hydraulic Actuator (Proportional Type)
Model: 157B4093 (Superseded by 11166732)
New Code: 11166732
Type: PVEH32 electro-hydraulic actuator, S7 series
Voltage Range: 11V – 32V DC (wide-range)
Pilot Pressure: 13.5 bar (PVE)
Connector: 1×4 Deutsch (DT04), IP67 rating
Control Signal: Ratiometric (proportional)
Response Time: 120ms (ON/OFF)
Hysteresis: 4.0%
Coil Power: 8W
Technology: Passive (no active fault monitoring)
Compatibility: PVG32 and PVG100 proportional valves
Certifications: CE, EAC, ISO13849 compliant
157B4036 – PVEH-DI Electro-Hydraulic Actuator (With Direction Indication)
Model: 157B4036 (New code: 11166819)
Type: PVEH-DI electro-hydraulic actuator
Voltage Range: 11V – 32V DC
Connector: 2×4 AMP connector
Control Signal: Proportional
Feature: Direction Indication (DI)
Fault Monitoring: Active
Compatibility: PVG32 and PVG100 proportional valves
Application: Precision proportional control systems
157B4032 – PVEH32 Electro-Hydraulic Actuator
Model: 157B4032
Type: PVEH32 electro-hydraulic actuator
Voltage Range: 11V – 32V DC
Connector: Hirschmann connector
Control Signal: Proportional
Fault Monitoring: Passive
Compatibility: PVG32 proportional valve
III. Key Technical Advantages
1. Low Hysteresis & High-Precision Control (PVEK Series)
PVEK incorporates hybrid-technology electronics with an LVDT position transducer and an innovative hydraulic bridge design featuring 2 solenoids + 2 orifices, delivering exceptionally low control hysteresis. For applications demanding high-precision flow and pressure control, PVEK provides superior response quality超越 traditional PVE Series 2 actuators.
2. 100% Direct Interchangeability & OEM-Standard Manufacturing
All models are manufactured to strict Danfoss OEM specifications, ensuring 100% mechanical and electrical interchangeability with original parts. Every unit undergoes comprehensive performance validation on dedicated test benches, with pressure, flow, leakage, and response characteristics 100% compliant with published specifications.
3. Wide Voltage Range & Multiple Connector Options
PVEH series (157B4093/11166732, 157B4032, 157B4036) support 11-32V wide-range voltage input, accommodating voltage fluctuations across different vehicle electrical systems. Available with AMP, Deutsch, and Hirschmann connector options to meet diverse OEM and retrofit requirements.
4. High Environmental Protection & Long-Life Design
Full series features high-grade environmental protection:
PVEK series: AMP connector, IP66 rating
PVEO/PVEH series: Deutsch connector, IP67 rating
High-strength engineering plastics and precision sealing ensure long-term reliable operation under severe conditions—high vibration, high dust, and high humidity—common in mobile machinery applications.
IV. Application Areas
This electro-hydraulic actuator series is specifically designed for proportional control systems in mobile and industrial hydraulics, compatible with the following equipment types:
Typical circuit applications include: proportional flow control, proportional pressure control, load sensing (LS) pressure management and unloading.
V. Expert Maintenance Tips
1. Oil Cleanliness Management (★★★★★)
PVEK series is sensitive to oil contamination. Maintain system oil cleanliness at ISO 4406 18/16/13 or better. Use 10μm or higher-precision return filters and inspect filter elements regularly.
2. Pilot Pressure Verification
PVEH series (11166732) requires 13.5 bar pilot pressure. Verify system pilot supply meets this requirement prior to installation—insufficient pilot pressure will cause inadequate spool stroke and sluggish response.
3. Electrical Connection Verification
PVEK (157B4911) : AMP 4-pin connector, verify correct polarity, signal voltage range 0.25×Vbatt to 0.75×Vbatt
PVEO (157B4292) : 1×4 Deutsch connector
PVEH (11166732) : 1×4 Deutsch DT04 connector
PVEH-DI (157B4036) : 2×4 AMP connector
4. Manual Override Operation
PVEK series supports manual override—activation requires approximately 40N force (measured at knob center), with 55N required for full activation.
5. Storage & Installation Environment
Recommended storage temperature: -40°C to +85°C. Avoid radial impact loads on the actuator body during installation. Tighten mounting bolts to Danfoss recommended torque (typically 10-12 Nm).
