Pneu-Hydro Products

Pneu-Hydro Products has long been a leading manufacturer of pneumatic and hydraulic valves and systems for the aircraft and missile industry. More recently, Pneu-Hydro has also pioneered in the design and fabrication of a rapidly growing line of industrial valves for hydraulic, pneumatic, and specialized fuel applications, especially as applied to automated production equipment and precision machinery of all types.

Typical commercial products include control valves, regulators, check valves, relief valves, filters, and actuators.

With completely integrated development, engineering, testing, and manufacturing facilities, Pneu-Hydro can meet your most exacting specifications. In many cases existing designs can be applied quickly to your requirements with a speed that rivals off-the-shelf delivery. All our facilities and experience are at your disposal. Feel free to call on us to discuss your problem.

Products

• Inline Relief Valves
• Miniature Relief Valves
• Right Angle Relief Valves
• Check Valves
• Hydraulic Quick-Vent Valves
• Hand Valves
• Shuttle Valves
• Pneumatic Control Valves
• Hydraulic Pneumatic Interface Valves
• Excess-Flow Check Valves
• Sand Probe Valves
• Pressure Indicators
• Inline Filters
• O-ring Tool Kit

Flow Data

The graph to the right will assist you in selecting the proper Pneu-Hydro relief valve for your application. Additional information on the standard valves shown in this catalog as well as special purpose variants is available on request.

Definitions and Formulae

Cv factor is a flow coefficient based upon 60°F water flow (in GPM) at a DP of 1 psi.
Cv capacity of valves and approximate flows are based upon the following equations.