About FM Valve Company

Made in the U.S.A.


Fluid Mechanics Valve Company is a Small Business and has Manufactured valves for over 50 years. Our lines of valves have been servicing all phases of industries in the Aerospace, Defense, Oilfield, Nuclear and Chemical Plants to name a few.


Fluid Mechanics part numbering system allows the customer to choose from a variety of different materials that best suit their application.

Fast Service

Most orders can be shipped within 2 weeks and all emergencies will be
given the utmost priority

Factory Testing

All of Fluid Mechanics valves are functionally tested after assembly and before shipment.

Quality Assurance

Fluid Mechanics quality system has been designed and approved for the following:

  • MIL-I-45208
  • NHB 5300.4 (IC)
  • ASME Code Section VIII (UV) Div. I
  • DNV & BV CRN: 0G8596.5

Custom Orders

Fluid Mechanics has the capability to custom fit to your specifications as well as manufacturing with exotic materials such as Hastalloy, Monel, Inconel 625 and Alloy 20.

Valve Design

Fluid Mechanics Relief Valves are Manufactured as Conventional type, Spring loaded, and Disc. type valves. Our orifices range from .125 to 1.281 and connection up to 4″. Fluid Mechanics Inline Check Valves are manufactured as spring loaded, Disc. type valves with pressures up to 15,000 WOG and connection sizes up to 4″.


All Fluid Mechanics products are guaranteed against defective materials or workmanship for one year from the date of shipment Warranty is voided when valves are used in a dirty system, tampered with or the seal wire is broken on the valve. SEE OUR FULL LINE CATALOGUE FOR FURTHER INFORMATION.

Capacity Certification

Most of Fluid Mechanics Valves are certified for Gas and Air service and carry the ASME UV CODE stamp on the nameplate. The 392 series carries the ASME UV CODE for liquid. We offer these valves in two types:

  • Top Guided for full Flow
  • Bottom Guided for less flow


To obtain a full catalogue, call FM Valves at 800.529.8575
Or email us (click here)

    • Safety Relief Valves

      Safety Relief Valves

      Fluid Mechanics Safety Relief Valves are designed to give bubble tight shut-off of clean dry gasses with consistent performance at pressures up to 35,000 psi

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    • Inline Relief Valves

      Inline Relief Valves

      Precision-made inline relief valves feature replaceable disc assemblies and highly suitable for hydraulic, air, and gaseous systems.

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    • Inline Check Valves

      Inline Check Valves

      Fluid Mechanics inline check valves are designed to give bubble tight shutoff for thousands of cycles when handling clean dry glasses or liquids.

      see products