The oil and gas valve structure and function

. The construction of the oil and gas dynamic valve
( ） Out of the oil and gas pneumatic valve and valve seat is precise matching parts, adopt high quality alloy steel manufacturing, the guide hole, upper and lower end face, and a hole through precision machining and grinding, after pair are not interchangeable.
（ ） Out of the oil and gas moving valve cone department was the axial seal cone of the pneumatic valve, pneumatic valve cone of sliding fit up the guiding role in the guide hole. Tail processing grooving, form the cross section, so that fuel through. The central oil and gas dynamic valve cylinder is reduced pressure zone, between it and seal cone formed a reduced pressure volume.
（ ） Pneumatic valve seat on the lower end face and plunger sleeve end face is a precision machining tight fit, it is stipulated by compression nut tightening torque to compaction. With compression nut a pneumatic seat between the thickness of the copper high pressure sealing washer. Out of the oil and gas valve compression nut and end on the shell and between low pressure seal gasket.
（ ） Dynamic valve in the oil and gas compression nut inner chamber equipped with slotted container, to reduce the inner cavity volume of the space, promote spraying stops quickly, to limit the dynamic valve lift of the largest oil and gas.
. The role of oil and gas dynamic valve
( ） Prevent drip before injection, the injection speed: fuel injection pump oil, treated oil pressure is higher than the oil and gas dynamic valve spring pre-tightening force and residual stress within the high pressure oil pipe, the oil and gas valve rises, the pneumatic valve seat seal cone left. Must wait until the oil and gas valve decompression, get entirely out of pneumatic valve seat of the guide hole, the fuel oil pump chamber can enter into high pressure tubing. P pump & lt; Spring P + P residual - Open; Spring + P P pump the residual - Shut.
（ ） Prevent drip after injection, improve the closing speed: stop the oil, the oil and gas moving valve under reduced pressure zone along a into the catheter, high pressure oil pipe and pump room access was cut off. When the oil and gas moving valve completely fell behind a distance h, thus high pressure tubing get increases, the volume of the oil pressure drop 1 very quickly mpa ~ 2 mpa, broken oil simply, quickly to prevent the because of the oil pressure fluctuation and 'tube shrink oil rose' and produce drip after spraying.
（ ） To prevent fuel flow back, keep the high-pressure tubing within a certain amount of residual stress.