CEI Servo Valve Repair & Sales
NC Servo Technology repairs and sells CEI servo valves and proportional valves. With over 19,000 valves in stock and 13 test stands, we deliver faster turnaround than sending units back to the manufacturer.
CEI Valve Testing on 13 Hydraulic Test Stands
Every CEI servo valve and proportional valve undergoes testing on our hydraulic test stands before shipment. We verify flow rates, pressure response, null settings, and leakage against manufacturer specifications.
- Flow characterization across full operating range
- Pressure gain and response time measurement
- Internal and external leakage verification
- Null bias adjustment and calibration
- Hysteresis and linearity testing

CEI Proportional Valve Repair & Rebuild Services
Our technicians disassemble, clean, and rebuild CEI valves to manufacturer specifications. We replace worn components, recalibrate electronics, and test each unit before returning it to service.
Disassembly & Inspection
Each CEI valve is disassembled and inspected under magnification. We document wear patterns and identify components requiring replacement.
Cleaning & Decontamination
Ultrasonic cleaning removes contaminants from valve bodies, spools, and internal passages. Mating surfaces are prepared for reassembly.
Component Replacement
Worn seals, O-rings, springs, and feedback devices are replaced with new components that meet or exceed original specifications.
Electronic Calibration
Servo amplifier cards and electronic feedback systems are tested and calibrated. Failed electronics are repaired or replaced as needed.
Reassembly & Adjustment
Valves are reassembled with proper torque sequences and gap settings. Null adjustments and gain settings are configured per manufacturer data.
Final Test & Documentation
Completed repairs undergo full performance testing. Test results are recorded and available upon request for an additional fee.
Independent Service for CEI Hydraulic Valves

NC Servo Technology has serviced CEI valves and other hydraulic control systems since 1975. As an independent service provider, we offer faster turnaround and competitive pricing compared to sending units back to the manufacturer.
- Veteran-owned business operating since 1975
- Over 19,000 servo and proportional valves in stock
- 13 hydraulic test stands for performance verification
- Support for discontinued CEI models
- 1-year warranty on all repairs
- Rush service available for time-sensitive needs
CEI Valve Service for Manufacturing & Industrial Applications
CEI servo valves and proportional valves are used across multiple industries for motion control and hydraulic positioning. NC Servo supports maintenance teams in these sectors with repair and replacement services.
Plastics & Injection Molding
CEI valves control injection speed, clamp pressure, and core positioning on molding machines. We keep your production lines running.
Metal Forming & Stamping
Hydraulic presses rely on CEI proportional valves for accurate force control. Our repairs restore manufacturer-level performance.
Machine Tool & CNC
Axis positioning and tool feed systems use CEI servo valves for accurate motion control in machining centers.
CEI Servo Valve Repair FAQs
What if you dont have my specific CEI valve in stock?
While we maintain an inventory of over 19,000 valves, if we dont have your specific CEI model in stock, we can act as a broker to source the valve you need. Our industry relationships allow us to locate hard-to-find and discontinued CEI valves from suppliers worldwide.
Do you offer exchange programs for CEI valves?
We maintain a large inventory of rebuilt CEI units. After evaluation, if your unit is not economical to repair or if you need faster turnaround, we can discuss purchasing a rebuilt unit from stock. Core credit may be available based on your unit's condition and parts value.
How long does a CEI servo valve repair take?
Turnaround depends on part availability, severity of damage, and whether we have replacement components in stock. Contact us for a timeframe estimate on your specific unit. Rush service is available for time-sensitive situations.
What warranty do you provide on CEI valve repairs?
All CEI valve repairs include a 1-year warranty covering parts and labor. The warranty applies when the valve is operated within manufacturer specifications. Contact us for warranty terms and conditions.
Can you repair discontinued CEI valve models?
Yes. NC Servo maintains parts inventory and technical knowledge for many discontinued CEI valve models that the manufacturer no longer supports. We can often repair or rebuild valves that OEMs consider obsolete.
Do you provide test documentation with repairs?
All valves are tested on our hydraulic test stands before shipment. Standard repairs include confirmation that the valve meets specifications. Test graphs and performance curves are available for purchase upon request.
Ready for CEI Valve Service?
Contact NC Servo Technology for CEI servo valve repair, proportional valve sales, or exchange options. Our team will respond with pricing and availability.
Request a QuoteCEI Products We Service
32 models available
CEI 99884
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CEI VS52M10SF
Reliable CEI VS52M10SF valve restoration services. Expert repair with professional testing and warranty coverage.
CEI PVE4420B
Professional CEI PVE4420B valve solutions from experienced technicians. Complete repair services with testing and warranty...
CEI NO ID TAG
Professional CEI NO ID TAG valve solutions from experienced technicians. Complete repair services with testing...
CEI JP10-118
Reliable CEI JP10-118 valve restoration services. Expert repair with professional testing and warranty coverage.
CEI 99916
CEI 99916 valve repair done right. We rebuild these units quickly with full testing and...
CEI 99706
CEI 99706 valve services. Repair, rebuild, and testing from experienced techs.
CEI 99531
Expert CEI 99531 valve repair and restoration services. Professional solutions for industrial valve requirements with...
CEI 99084
CEI 99084 valve services. Repair, rebuild, and testing from experienced techs.
CEI 41055FA
CEI 41055FA valve repair done right. We rebuild these units quickly with full testing and...
CEI 41053
CEI 41053 valve repair done right. We rebuild these units quickly with full testing and...
CEI VS8640VBI31B
Don't let a faulty CEI VS8640VBI31B valve slow you down. Our technicians specialize in diagnosing...
All CEI Products
- CEI 99884 - Model: CEI-99884
- CEI VS52M10SF - Model: CEI-VS52M10SF
- CEI PVE4420B - Model: CEI-PVE4420B
- CEI NO ID TAG - Model: CEI-NO-ID-TAG
- CEI JP10-118 - Model: CEI-JP10-118
- CEI 99916 - Model: CEI-99916
- CEI 99706 - Model: CEI-99706
- CEI 99531 - Model: CEI-99531
- CEI 99084 - Model: CEI-99084
- CEI 41055FA - Model: CEI-41055FA
- CEI 41053 - Model: CEI-41053
- CEI VS8640VBI31B - Model: CEI-VS8640VBI31B
- CEI V5S3115SV12B0 - Model: CEI-V5S3115SV12B0
- CEI PVE1105 - Model: CEI-PVE1105
- CEI JP5 BODY ONLY - Model: CEI-JP5-BODY-ONLY
- CEI H0920-1500-15 - Model: CEI-H0920-1500-15
- CEI 031305-16-95 - Model: CEI-031305-16-95
- CEI 99687 - Model: CEI-99687
- CEI 99527 - Model: CEI-99527
- CEI 90215B122B - Model: CEI-90215B122B
- CEI 41055-FA - Model: CEI-41055-FA
- CEI 3679200130 - Model: CEI-3679200130
- CEI VS8640SB1314 - Model: CEI-VS8640SB1314
- CEI V105S - Model: CEI-V105S
- CEI PCS601B - Model: CEI-PCS601B
- CEI JP15-110 - Model: CEI-JP15-110
- CEI H0920-1500-10 - Model: CEI-H0920-1500-10
- CEI 99707 - Model: CEI-99707
- CEI 99612 - Model: CEI-99612
- CEI 99477 - Model: CEI-99477
- CEI 62323 - Model: CEI-62323
- CEI 41055 - Model: CEI-41055
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