Valve Overview

We handle a wide range of MOOG 931-C units. Each one receives inspection, internal cleaning, and reconditioning before it ships.

About Our Shop

NC Servo Tech operates independently, so we’re not tied to manufacturer delays or restrictions. That means more flexibility when your system is down.

17,000+ valves in stock including MOOG 931-C exchange units

Frequently Asked Questions

You’ll hear from us either way. If it’s not repairable, we’ll return the unit and provide our findings.

Yes. Our technicians can often identify units based on photos, dimensions, or manufacturer markings. Send a photo before shipping to speed up intake.

We can often prioritize urgent jobs. Note it on your request form and we’ll let you know what’s possible.

Warranty coverage of a one-year warranty is included with every repair we complete.

Helpful but not required. If you can photograph the label, connectors, and overall unit, it gives our team a head start.

Repair Process

The process begins with disassembly and visual evaluation. We then clean, replace worn pieces, and reassemble the valve to restore its function.

  • Leak and Pressure Testing: The reassembled unit is leak-tested and pressure-tested to verify it meets published specs.
  • Teardown: Every valve is disassembled for internal inspection.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.
  • Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.

Testing and Bench Verification

With over a dozen dedicated flow test stands and a Hagenbush proportional valve system, we verify flow curves, hysteresis, frequency response, and more. Performance reports and graphs are available for purchase on request. Our performance testing verifies spec-level operation.

Additional MOOG 931-C Services

Beyond standard refurbishment, we offer specialized reconditioning for your MOOG 931-C unit. Our overhaul process includes pressure testing and mineral bath cleaning, using only new replacement components.

Maintenance Tips

  • Replace inline filters according to maintenance schedules to maintain proper flow rates.
  • Conduct thorough visual inspections for wear or leaks during routine maintenance.
  • Perform fluid analysis to detect contamination early and prevent system damage.

Need Your MOOG 931-C Back Online?

Request pricing, availability, and turnaround for your MOOG 931-C. NC Servo Tech provides independent repair with a 1-year warranty. Contact us to set up your repair.

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NC Servo Tech is an independent third-party repair facility. We are not affiliated with, endorsed by, sponsored by, or authorized by MOOG or any original equipment manufacturer (OEM), nor do we claim to be a MOOG service center. All brand names, trademarks, model numbers, and part numbers referenced on this page are the property of their respective owners and are used solely for identification and compatibility purposes.