01
Component-level rebuild
Pilot stage, spool, coil, seal, and connector work. Each unit is opened and inspected; failed components are replaced individually.
Industrial Valve Repair
Heavy-Industrial Valve Repair, Component-Level
Independent third-party industrial valve repair for hydraulic servo, proportional, cartridge, and directional control valves on heavy-industrial machines. Component-level rebuild, bench testing, donor parts service, and cross-brand sourcing across 20+ valve brands. Working on this hardware since 1975.
50+
Years on industrial hardware
19,000+
Donor parts pool
13
Hydraulic test stands
Services
Six lanes of industrial valve work
The shop is structured around the same handful of jobs whether it's a 1970s servo on a steel-mill press or a current proportional on a CNC line. Lead time depends on the unit and donor parts availability.
02
Bench verification
Hagen-Busch hydraulic test stand for current and CANbus-capable valves, plus older-style stands for legacy hardware. Documented procedures by family.
03
Donor parts service
19,000+ unit in-house pool. When the OEM no longer stocks parts for older valves, the shop pulls from donor units that come through.
04
Rebuilt swap-with-discount
If a rebuilt match is on the shelf, customers can trade in the failed unit for a discount on the rebuilt one.
05
Cross-brand sourcing
If your specific valve is beyond economic repair, we suggest a comparable cross-brand option that drops in.
06
Onboard driver-card work
Component-level board repair on proportional and servoproportional valves with integrated driver electronics. LVDT and feedback channel verification.
In the Shop
Bench-level work, not box-swapping
The shop opens valves down to the spool, lap surface, and pilot stage. Donor parts come from a 19,000+ unit in-house pool accumulated since 1975, and spool restoration happens on the in-house machining setup when replacement parts are not available from the OEM.
Each repaired valve is checked on the hydraulic stand before it ships. Flow, pressure gain, response, null, and leakage all verified against documented procedures for the family. Performance graphs and detailed test data are available on request.
Where Industrial Valves Live
Industries the bench has seen
The same servo and proportional valves move between very different machines. The shop has worked across these heavy-industrial application contexts since 1975.
Steel mill & rolling
Roll-force proportional valves on rolling mills and process-line hydraulics.
Hydraulic press
Force-control valves on stamping, forming, and metal-shaping press lines.
Injection molding
Injection speed, clamp pressure, and core-positioning valves on molding machines.
Machine tool & CNC
Axis positioning and tool-feed servo valves on machining centers and grinders.
Paper & pulp
Paper-machine roll-position valves and pulp-line hydraulic control.
Mobile & off-highway
Construction equipment, marine, and heavy mobile hydraulic valves.
Power & energy
Steam and gas turbine governor valves, power generation hydraulic control.
Sawmill
Sawmill positioner valves, edger drives, and band-saw feed-rate hydraulics.
Brands
Industrial valve brands serviced
Top valve brands seen on industrial hydraulics. Click through for the dedicated brand page.
For the full directory of 20+ brands, see the valve repair hub.
Workflow
From part number to ship-back
Same four-step path through the shop whether the unit is a discontinued 1970s industrial valve or a current production proportional with onboard electronics.
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01
Get in touch
Call or email with the part number, machine context, and a photo of the nameplate if it helps.
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02
Bench review
Tech opens the valve, inspects spool and pilot stage, and runs it on the hydraulic stand to confirm what failed.
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03
Cost & approval
We call back with the cost and a rough turnaround. Nothing is started without your sign-off.
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04
Repair, test, ship
Failed components replaced from inventory or off donors, the valve verified under pressure, and shipped back.
FAQ
Common questions about industrial valve repair
Service-level questions. For brand-specific FAQs, see the dedicated brand page or the valve hub.
What kinds of industrial valves do you repair?
Servo valves, proportional directional valves, cartridge and logic valves, pressure control valves, flow control valves, and standard solenoid directional valves. Hardware off heavy-industrial hydraulics: presses, mills, machine tools, molding machines, and process equipment.
Do you repair pumps as well?
No. We focus on hydraulic valves and electronic drives. We do not repair hydraulic pumps. If your valve job involves pump-side work, that stays with your pump shop or in-house team.
Do you offer on-site service or pickup?
The shop is bench-based; customers ship units in and we ship them back. We do not run an on-site field-service team. For most industrial repairs, sending the unit in is the practical path.
What if my valve is beyond economic repair?
If the valve is not fixable, we will let you know and help source a replacement: a rebuilt match if we have one on the shelf, or a comparable cross-brand alternative.
Do you provide test documentation?
Each repaired valve is bench-tested before it ships. Performance graphs and detailed test data are available on request.
What is the warranty?
One year on parts and workmanship for repairs and rebuilt units. Standard exclusions apply for contamination, improper installation, and out-of-spec operation.
More from NC Servo
Related repair hubs
Industry-specific machine pages, the broader valve and drive hubs, and technical reading on testing and failure causes.
Valve repair hub
Full directory of 20+ valve brands with dedicated pages, plus deeper category coverage.
Servo drive repair hub
Component-level board work on servo drives, amplifiers, and motion controllers.
Injection molding
Industry-specific hub for valve and drive repair on injection molding machines.
Hydraulic repair services
Broader services overview combining valve, drive, and electronic control work.
Repair vs replace
When component-level repair makes sense versus buying new or rebuilt.
Servo valve failure causes
Contamination, hardened seals, blown coils, and the most common failure modes.
What is a servo valve?
Plain-English explainer on what's inside an electrohydraulic servo valve and why these units come in for repair.
What is a proportional valve?
How proportional and servoproportional valves differ from true servo valves, what's inside, and what gets done at the bench.
Industrial valve down? Send a part number
Give us a call or send a part number. We'll check the donor pool, suggest a rebuilt match if we have one, and walk through repair or cross-brand options if we don't.