Our hydraulic control valve is designed to work with double-acting cylinders. This hydraulic directional control valve has two spools, #8 SAE O-ring in/out ports, and is constructed of cast iron for long-lasting use. High Performance: The highest flow rate for this hydraulic relief valve is 11 GPM, and the pressure range goes up to 3600 PSI. Widely Utilized: This hydraulic directional valve is appropriate for use with log splitters, small tractors, tractor loaders, etc. Max Operating Pressure: 3600 PSI. Nominal Flow: 11 GPM (40 L/min). A, B Ports: 3/8 BSPP. P, T, N Port: 1/2 BSPP. Weight: 14 lb (6.3 kg). Dimensions: 12.2” x 8” x 5.1” / 31 x 20.3 x 12.95 cm. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. Furthermore, we put the needs of our customers first and foremost. If you have any problem with your order, please get in touch with us, and we will do our best to make you satisfied.