157B4735 Danfoss PVEA Actuator PVG32 11-32V

Product Overview

Danfoss 157B series components (including 157B4735, 157B4734, 157B4116, 157B4028, 157B4078, 157B5110, 157B3171) are core actuators and modules for the PVG32 proportional valve group. The 157B4735 is a PVEA proportional electro-hydraulic actuator with passive fault monitoring, operating on 11-32 V and designed specifically for precise main-spool control on PVG32 valves. Fully interchangeable with genuine Danfoss PVG32 systems, the range covers open/closed-center pump-side modules, mechanical and electro-hydraulic actuation. Every unit undergoes rigorous simulated duty-cycle testing for reliable long-term performance in mobile and industrial hydraulic applications.

Technical Specifications

• Example Models: 157B4735 (PVEA passive), 157B4734 (PVEA active), 157B4116 (PVEM), 157B4028 (PVEH), 157B5110 (PVP inlet module), 157B3171 (PVM mechanical)
• Compatible Valve Group: PVG32
• Supply Voltage (PVE series): 11-32 V DC
• Control Signal: Ratiometric
• Pilot Pressure: Nominal 13.5 bar
• Ingress Protection: IP66 (typical for PVEA)
• Fault Monitoring: Passive (157B4735) / Active (157B4734)
• Connector Type: AMP (common)
• Hysteresis: Approx. 2% (PVEA)
• Response Time: Stroke approx. 350 ms class (model dependent)
• Weight: Actuators approx. 0.9–1.0 kg; pump-side modules approx. 3 kg

Key Technical Advantages

1. Precise proportional control: PVEA/PVEH/PVES series deliver low hysteresis and high repeatability for accurate main-spool positioning.
2. 100% drop-in interchangeability: Direct mechanical and electrical compatibility with original Danfoss PVG32 valve bodies and legacy 157B actuators — no modifications required.
3. Versatile actuation and modules: Covers electro-hydraulic proportional, on/off, mechanical actuation and open/closed-center pump-side modules for diverse system needs.
4. High reliability and tested performance: IP66 protection, wide voltage range and 100% duty-cycle testing ensure durability under vibration, dust and temperature extremes.

Application Areas

• Construction machinery (excavators, loaders, cranes) main-valve proportional control
• Agricultural and forestry equipment requiring precise hydraulic functions
• Material-handling and port equipment
• Mobile hydraulic systems needing reliable PVG32 actuators and modules

Expert Maintenance Tips

Verify pilot-oil cleanliness meets ISO 4406 18/16/13 or better and inspect O-rings/interfaces before installation. Follow correct pin assignment for PVE actuators and shield signal lines. Periodically check connector seals and fault-signal status; maintain pilot pressure near 13.5 bar. Prefer matching fault-monitoring type (active/passive) when replacing to preserve system diagnostics. Protect valve-body surfaces during service to prevent contamination of the pilot circuit.