3CA300 Series Cartridge Check Valve, 4.4 PSI Cracking Pressure, Nitrile Seals

In plain terms, it lets hydraulic oil flow freely one way and checks it in the opposite direction. It is a direct acting, ball style screw in cartridge check valve that’s commonly used in mobile and industrial hydraulic setups like harvesters and refuse haulers.

With a temperature range of –22° to 194°F, this cartridge check valve should be suitable for hydraulic systems with moderate heat. Just make sure your system stays within that range for optimal performance.

For mobile equipment like refuse haulers and harvesters, 4.4 PSI cracking pressure is on the low end, which is generally a good thing. Lower cracking pressure means the valve opens with minimal upstream force required, so flow gets moving without fighting the spring. That said, low spring settings like this are intentional on this series and work well in applications where backpressure needs to stay minimal. Just make sure your system filtration is at cleanliness level 18/16/13 or better, because a valve this precise does not tolerate dirty fluid well.