If the fuel tank vent valve is set, you can look at pipe joints loose cylinder price, and then a few more times to exhaust action. But pay attention to large tonnage injection cylinder, if the cylinder pressure joints, the selection pressure joints are more secure because it is easy to operate, in general, the best in the high exhaust cylinder, so the effect is better. If neither of the fuel tank, exhaust operation can be carried out, the specific operation is: let the piston movement in one direction, pause for some time, and then it moves to the other direction, then pause for some time, so repeated hollow cylinder, you can drain the air in the cylinder. That cylinder hydraulic cylinders, hydraulic cylinder output force and the effective area of ??the piston and the pressure is proportional to both sides of the linear motion-type actuator, whose function is the hydraulic energy into mechanical energy. Hydraulic cylinders are hydraulic energy into mechanical energy, make a linear reciprocating motion (or swing movement) of the hydraulic actuators. Hydraulic cylinder output force and the effective area of ??the piston and the pressure is proportional to both sides; consisting essentially of hydraulic cylinders and cylinder head, piston and piston rod, seals, cushioning device component and exhaust. Hollow cylinder | Hydraulic Lu (certified) | cylinders supplied by Lu of hydraulic equipment plant in Texas. Texas Lu force hydraulic machinery plant (www.luliyeya.com) is a leader in Dezhou, hydraulic machinery and parts, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Lu Hydraulic leadership with the staff warmly welcome all inquiries negotiations to create Lu hydraulic force a better future.