The local Israeli manufacturer was not willing to take risk to develop the hydraulic cartridge relief valve due to small size, and gave it up. After taking over, AAK made 3 improvements in the structure of the hydraulic cartridge relief valve, met the 3 requirements: 450bar high pressure resistance, 500L/min large flow, small pressure loss, and small volume. 3 months later, Vaughan sent an order for 600 hydraulic cartridge relief valves.
Vaughan is from Israel, and they mainly focus on hydraulic equipment in the military market. At the beginning of last year, they customized a hydraulic power unit, which needs to have a pressure resistance of 450bar, the flow controlled by the hydraulic cartridge relief valve in the system exceeds 500L/min, with small pressure loss and small volume. He contacted a local hydraulic relief valve manufacturer to try the sample. The manufacturer reported that there was no problem with the functional requirements, but the size was too small and the risk was high, so he was unwilling to develop it. Vaughan contacted more than 10 hydraulic cartridge valve manufacturers, but it was fruitless after 1 week.
Vaughan noticed AAK's article on high pressure and large flow hydraulic cartridge valves on B2B. He emailed me: can AAK try the hydraulic cartridge relief valve with high pressure resistance of 450 bar, flow over 500L/min, small pressure loss and small volume? My reply: It depends on how small the volume is. Vaughan sent the drawing of hydraulic cartridge relief valve. After getting the confirmation that AAK can optimize the internal structure of the hydraulic cartridge relief valve, he confirmed for us to make samples. After 50 days, AAK sent 12 hydraulic cartridge relief valve samples.
3 months later, Vaughan sent an order for 600 hydraulic cartridge relief valves. Their engineers were very satisfied with AAK hydraulic cartridge relief valves, which not only met the high pressure resistance of 450bar, large flow of 500L/min, small pressure loss, and small volume, but also completely met the requirements of the drawing, solving the space barrier of their power unit.
AAK has made 3 improvements in the structure of the hydraulic cartridge relief valve:
1. The inner wall of the outer end of the hydraulic cartridge relief valve cage is provided with a boss to limit the valve spool in the valve cage. The valve spool, the valve cage and the valve cover form the first chamber. The first chamber is provided with a pressure regulating spring, one end of which is connected with the valve cover and the other end is connected with the valve spool body.
2. The right end of the valve cage is provided with a first oil port, and the circumference of the valve cage is provided with 2 rows of second oil ports.
3. The outer wall of the right end of the valve spool is provided with a groove, and the groove and the second oil port of the valve cage form a second chamber.
For the hydraulic cartridge relief valve with such structure, when the oil enters from the first oil port and the oil pressure on both sides of the valve spool is not equal, the valve spool moves to the left, the 2 oil ports are connected, the valve port is opened for overflow, and the flow pressure loss in the valve is small. The valve cage is provided with a plurality of second oil ports to ensure large flow.
AAK hydraulic cartridge relief valve, has small pressure loss and compact size, you can also try a small order!