Split flow gear pump/Parker Double Gear PumpComments:
In a fan drive circuit fan speed is adjusted by providing a varying Pulse Width Modulated electrical current signal to the proportional relief valve which controls the flow to the fan motor. The proportional valve is typically a normal closed type to assure failsafe full fan speed in case of a lost signal. The anti-cavitation check valve allows the motor to spin freely when the fan is powered down. Variations for PGM 511 / PGM 620 / PGM 640 normally open valves, increasing pressure with increasing current normally closed valves, decreasing pressure with increasing current with internal or tank return Applications Fan Drives
![Split Flow Gear Pump](//image.made-in-china.com/226f3j00oEITjBYcRHUt/Split-Flow-Gear-Pump.webp)
![Split Flow Gear Pump](//image.made-in-china.com/226f3j00oQPaZjRGFIfE/Split-Flow-Gear-Pump.webp)