A-Series Hydraulic Bypass Relief Valves

  • API 520 & 614 Approved
  • Chatter‐free operation
  • Mount in any position
  • Suitable for continuous duty


Size Range: 2.5″ – 4″
Pressures: Up To 500 psi
Flow Rate: 150-600 gpm
Connections: Threaded, Flange
Materials: Cast Iron, Cast Steel, Stainless Steel

Applications: Load regulation system protection for hydraulic and lubricating systems

A-Series Direct Acting valves operate at pressures to 150 psi. A-Series Internal Pilot operated valves operate at pressures to 500 psi. Both types handle large flows of liquid of all viscosities encountered in industrial practice.

Choose your Fulflo A‐Series Valve type for more information

Direct Acting with Threaded Connections

Direct Acting with Flange Connections

a series internal pilot threaded

Internal Pilot with Threaded Connections

Internal Pilot with Flange Connections

Not sure which Fulflo valve you need?

Visit our Valve Configurator.


Imperial or Metric