Specialist Repairs
Proportional & Servo Valve Repair
Proportional & Servo Valve Repair at Yekta Sanaat: Inspection and repair of electronically controlled proportional and servo valves.
Proportional and servo valves are sensitive to oil contamination and command signal quality. Correct diagnosis includes the mechanical parts as well as the command signal, feedback and electrical connections. Repair feasibility is confirmed for each model after receiving its specifications and a technical review.
Why is proportional and servo valve repair specialised?
Proportional and servo valves set pressure or flow in proportion to an electrical signal, so their mechanical and electronic parts must work together. For that reason, besides inspecting the spool, sleeve and internal filter, the on-board electronics or the control card must also be checked.
Common symptoms include actuator oscillation, a slow response to commands, position errors and high internal leakage. These valves are very sensitive to oil contamination; therefore, checking the oil condition and the circuit filters after the repair is also recommended.
Before you send the valve
Write the full code of the valve and the control card, the brand and how the machine behaves in the repair request form. Listed models can be found in the hydraulic products catalogue.
Proportional & Servo Valve Repair: common symptoms
- No response to the command signal
- Oscillating or unstable motion (hunting)
- Poor position or speed accuracy
- Digital control card or feedback errors
- Excessive leakage in the neutral position
Proportional & Servo Valve Repair: how it works
- 1
Submit details
brand, model, command signal type and symptoms.
- 2
Technical review
contact and initial assessment.
- 3
Estimate
issued after mechanical and electrical inspection.
- 4
Approval
work starts after your approval.
- 5
Repair and testing
adjustment, replacement of parts and functional testing.
- 6
Handover
supplied with installation and adjustment guidance.
Warranty and test pressure claims are published only after company confirmation.
Frequently asked questions
Can servo valves be repaired?
Feasibility is assessed for each model after receiving its specifications.
What information is needed for diagnosis?
The valve model, signal type, control card and a description of the machine behaviour.