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NFPA Hydraulic & Pneumatic Cylinders

Hydraulic and pneumatic cylinders should meet the standards of the National Fire Protection Association (NFPA) for use in potentially explosive settings. Specific rules for the design and construction of hydraulic and pneumatic cylinders have been established by the National Fire Protection Association (NFPA) to protect the safety of anyone working with or close to hazardous liquids and gases.

NFPA Hydraulic Cylinders

An NFPA Cylinder is a type of cylinder that conforms to the NFPA standard for dimensional interchangeability and better protection. NFPA cylinders have several unique features, such as:

NFPA Pneumatic Cylinders

Pneumatic cylinders that meet NFPA standards are also available. These cylinders have many of the same features as NFPA hydraulic cylinders

In addition, NFPA pneumatic cylinders also feature the following:

Both NFPA hydraulic cylinders and pneumatic cylinders are available in various sizes and configurations to suit your specific application needs.

Pneumatic Hydraulic Cylinder

A pneumatic hydraulic cylinder, or NFPA cylinder, is an actuator used in industrial and manufacturing settings. Its primary function is to convert the compressed air energy supplied to it into mechanical force to move a load.

The NFPA cylinder standards design includes a piston inside a cylindrical tube, which moves back and forth within the tube as pressurized air is applied. This movement can be controlled by valves, allowing for precise load manipulation.

NFPA cylinder standards come in different sizes and types, including single-acting cylinders that use pressurized air to push the piston in one direction and double-acting cylinders that use pressurized air to move the piston forward and backward. Overall, NFPA cylinders provide reliable and efficient operation for various industrial functions.

Features of our NFPA Hydraulic & Pneumatic Cylinders

What we offer at Metro Hydraulic

Sales of standard and custom-designed Hydraulic & pneumatic cylinders to meet your specifications. We are also cylinder repair & rebuilding experts. We have an extensive parts inventory, including standard and metric chrome rods, seals, pistons & components.

Our complete machine shop and welding capability enable us to do the job correctly the first time. All work is done in-house so we can have you up and running quickly.

Contact us with inquiries or questions regarding our products and services.







Has been building hydraulic and air cylinders for industry since 1949. They offer a full line of NFPA and custom cylinders built to your specifications. They also offer a welded design cylinder built for demanding applications. Bore sizes offered are 1 ½” to 24” bore in pneumatic and 1 ½” to 14″ bore in hydraulic. Pressures up to 5000 PSI.
Cunningham AA Air Cylinders (PDF – 5550KB)
Cunningham AP Large Bore Air Cylinders (PDF – 5320KB)
Cunningham HS Large Bore (PDF – 3240KB)
Cunningham CM Welded Cylinder (PDF – 4330KB)
Cunningham AO Hydraulic Medium Duty (PDF – 5100KB)
Cunningham HS Hydraulic Heavy Duty (PDF – 4730KB)
Cunningham HST Tempsonic Cylinder (PDF – 2480KB)

Milwaukee Cylinder


Milwaukee Cylinder is a long established and recognized supplier of engineered cylinder solutions and is a manufacturer of steel and aluminum NFPA tie-rod cylinders for both hydraulic and pneumatic applications. They engineer many unique “specials” for very demanding applications over a wide range of Markets and Industry Segments.
Milwaukee H Hydraulic Heavy Duty Cylinder (PDF – 1990KB)
Milwaukee Linear Alignment Coupler (PDF – 1110KB)
Milwaukee Pressure Booster Catalog (PDF – 490KB)
Milwaukee LH Hydraulic Medium Duty Cylinder (PDF – 1020KB)
Milwaukee Power Units (PDF – 738KB)
Milwaukee-Linea-Alignment-Coupler (PDF – 347KB)



Complete line of standard and heavy duty cylinders & components consisting of tie-rod cylinders, welded construction cylinders, clevis cylinders, snow plow cylinders, single & double acting telescopic cylinders.
Hercules 2009 Generic Cylinder (PDF – 25900KB)

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Quality Services Since 1941

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For over 70 years, Metro Hydraulic Jack Company, a third-generation, family-owned and operated business, has been providing industrial hydraulic parts and equipment services to commercial, automotive, marine, refuse, and construction industries.


As a leading U.S. sales and service center, we provide an unmatched customer experience and create long-lasting professional relationships with our clients.


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