Specific role of hydraulic control one-way pneumatic valve

the role of the hydraulic control one-way pneumatic valve is as follows:
and keep sliding pressure pneumatic valve type reversing pneumatic valve has a clearance leakage phenomenon, pressure maintaining only a short time. When pressure requirements, can be in oil and add a hydraulic control one-way pneumatic valve, pneumatic valve of cones to shut down the rigor, make the oil pressure for a long time.
and hydraulic cylinder 'support' in the vertical hydraulic cylinder, due to slippery pneumatic valve and tube leaking, under the gravity of the piston and piston rod, may cause the piston and piston rod. The hydraulic control one-way pneumatic valve in the hydraulic cylinder oil of inferior vena, can prevent the hydraulic cylinder piston and slider part.
and realize the pneumatic valve in the hydraulic cylinder lock when reversing, two hydraulic control one-way pneumatic valve closed, two cavity can be tightly closed hydraulic cylinder oil, when the piston can't move due to external force.
two cavity, large flow discharge of oil hydraulic cylinder of the difference in effective work area.
and when the piston return, hydraulic cylinder cavity oil discharge quantity increases sharply, right at this time if the use of small flow slide pneumatic valve, will produce the throttling effect, limiting the backward speed of piston; If adding hydraulic control one-way pneumatic valve, the hydraulic cylinder piston back when the control pressure oil hydraulic control one-way pneumatic valve to open, can the right cavity oil discharge smoothly.
, for oil and gas filling valve vertical hydraulic cylinder of the piston in the process of high speed dropped, because of the action of high pressure oil and self-respect, causing decreased rapidly, the suction empty and negative pressure, must add oil compensating device. Hydraulic control one-way pneumatic valve used as oil and gas dynamic filling valve, to complete the function of fill oil.
and assembled into the reversing pneumatic valve
in the design of hydraulic circuits, sometimes hydraulic control one-way pneumatic valve can be combined into the reversing pneumatic valve is used.
for example, use two hydraulic control one-way pneumatic valve and a one-way valve parallel ( One-way pneumatic valve center) Three, the equivalent of a three-way reversing pneumatic valve commutation circuit. To point out, the control oil pressure oil mouth does not work, should make it back to the fuel tank, or it will be hard to reset, the control piston one-way pneumatic valve reverse as flow.