Pvpx Electrical Ls Unloading Valve - Danfoss PVG 32 Service Manual
Proportional valve group
Hide thumbs
Also See for PVG 32:
- Technical information (76 pages) ,
- Service manual (15 pages) ,
- Application manual (13 pages)
Table of Contents
Advertisement
Service Manual
PVG 32 Proportional Valve Group
Operation
PVPX Electrical LS unloading valve
©
Danfoss | February 2017
Due to these factors use pressure control spools only when you know for certain that problems with
stability will arise – or already have arisen.
Use LS
when pressure stability is an issue.
A/B
PVPX is a solenoid LS unloading valve. PVPX is fitted into the pump side module enabling a connection to
be made between the LS and the tank lines. Thus the LS signal can be relieved to tank by means of an
electric signal.
For a PVP pump side module in open center version the relief to tank of the LS signal means that the
pressure in the system is reduced to the sum of the tank port pressure plus the neutral flow pressure for
the pump side module.
For a PVP pump side module in closed center version, relief to tank of the LS signal occurs when the
pressure is reduced by the sum of the tank port pressure for the pump side module plus the stand-by
pressure of the pump.
C
Caution
Protect yourself from injury. Use proper safety equipment, including safety glasses, at all times.
11039167 | AX00000031en-US0301 | 13
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
Need help?
Do you have a question about the PVG 32 and is the answer not in the manual?
Questions and answers
После нескольких поворотов катка гидравлика уходит в аварию при перезагрузке снова срабатывает несколько раз и останавливается в аварии.
The Danfoss PVG 32 hydraulic system could go into fault mode after several turns of the roller due to the following possible causes:
1. Contamination in Hydraulic Oil – Dirt or debris in the oil can affect valve operation.
*Check*: Take an oil sample.
*Corrective Action*: Flush the system and refill with clean, filtered fluid per OEM specifications.
2. Air in Hydraulic Pilot Lines – Air trapped in the signal lines can cause unstable operation.
*Check*: Inspect for air in the signal lines.
*Corrective Action*: Bleed air from the hose connection at the valve section.
3. Low Hydraulic Oil Supply – Insufficient oil can cause pressure drops and improper function.
*Check*: Verify fluid level in the reservoir.
*Corrective Action*: Refill with clean, filtered fluid per OEM specifications.
4. Faulty Hydraulic Remote Actuator – A malfunctioning actuator can lead to inconsistent valve response.
*Check*: Measure signal pressure from the remote hydraulic controller.
*Corrective Action*: Repair or replace the actuator.
5. External Hydraulic Pilot Pressure Too Low – If pressure is too low, the main spool may not function properly.
*Check*: Measure external pilot pressure from the pilot pump and check for restrictions.
*Corrective Action*: Ensure the pilot pressure meets the required specifications.
6. Leaking or Burst Supply Hose – A damaged hose can lead to pressure loss and system faults.
*Check*: Inspect supply lines to the valve stack.
*Corrective Action*: Repair or replace damaged hoses.
These potential causes should be systematically checked and corrected to restore proper system operation.
This answer is automatically generated