Teardown and Rebuild Steps

Each MOOG 631-343C undergoes reconditioning — disassembly, parts replacement, reassembly, and bench testing before shipment.

Why Repair With NC Servo

NC Servo Tech specializes in both valves and electronic controls, which lets us operate without the delays of OEM service centers.

Frequently Asked Questions

Rush and priority service options exist. Availability depends on current workload, so contact us early.

Send it in for evaluation. We’ll inspect it and give you a repair-vs-replace recommendation based on the actual condition of the unit.

Yes. Photos of the nameplate and overall unit let us begin identification before it arrives, which speeds up the process.

All repairs come with a 12-month warranty on parts and labor. Contact us for specifics on your unit.

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

Rebuild Steps

The repair process for the MOOG 631-343C includes disassembly, diagnostic review, and replacement of failed seals, spools, or other elements. Final assembly includes leak and function testing.

  • Seal and Gasket Replacement: Worn seals and gaskets are replaced with new components during every rebuild.
  • Teardown: Every valve is disassembled for internal inspection.
  • Final Performance Verification: After reassembly, each valve is bench-tested against published performance specifications.
  • In-House Parts Sourcing: Many repairs use components sourced from our inventory of 17,000+ units.

Testing and Bench Verification

We carry out full diagnostics on every valve, including flow gain, leakage, pressure shift, and frequency testing. Our test facility supports performance logging and report generation. Our functional testing verifies proper functionality.

Industries We Serve

Our reliable repair services for the MOOG 631-343C are trusted across various sectors including Power Generation, Plastics & Injection Molding, and Industrial Machinery. We understand the unique demands of valves in these environments.

Technical Specifications

Every MOOG 631-343C we service is tested under typical applications. Our diagnostics verify performance against published specifications. Specification sheets and Performance data are available for purchase upon request.

Additional MOOG 631-343C Services

Beyond standard refurbishment, we offer specialized reconditioning for your MOOG 631-343C unit. Our teardown process includes disassembly and spool evaluation, using only new replacement components.

In-House Inventory for MOOG 631-343C

With more than 17,000 valve units in inventory, we can often provide faster turnaround by sourcing parts in-house rather than waiting on OEM lead times.

Maintenance Tips

  • Perform fluid analysis to detect contamination early and prevent system damage.
  • Replace inline filters according to maintenance schedules to maintain proper flow rates.
  • Monitor operating temperatures to identify potential issues before failure occurs.

Need Your MOOG 631-343C Back Online?

Request pricing, availability, and turnaround for your MOOG 631-343C. NC Servo Tech provides experienced repair with a 1-year warranty. Contact us to schedule 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.