Japan CKD solenoid valve Japan CKD proof solenoid valve SCA2-FB-40B-127 / Z Japan CKD proof solenoid valve: SCA2-FB-40B-127 / motion curve Z CKD proof solenoid valve, two exhaust valves for motion curve. The ordinate represents the lift h, the abscissa is the crank angle (or time). As can be seen from the figure of the opening and closing valves are relatively fast. And the valve opening speed is always higher than the valve closing speed, because the valve opening process is in a high piston speed stage, and the valve is closed when the piston is displaced to close only position, already at low piston speed circumstances. In the process of opening and closing the valve, the valve, and the valve lift limiter will be subject to alternating shock loads, it is likely to cause wear and damage. CKD proof solenoid valve spring is too soft or other reasons due to a stalemate, so the delay valve is closed, the impact is particularly large, easily damaged valve. In order to improve the life of the need to increase the spring force, the spring force is too large but also not appropriate, because the air flow will not only increase the pressure loss through the valve, but also due to the pressure difference across the valve is not sufficient to overcome the spring force, so that valve can not always fit the lift limiter oscillate result in increased total resistance loss. Therefore, to overcome the effects of this contradiction, the choice becomes rigid spring is an ideal that has just opened the valve spring force softer stage, after the rapid hardening, in order to reduce the impact on the valve lift limiter; closed, start very quickly, then the spring force decreases rapidly, can reduce the impact on the seat. CKD proof solenoid valve and a direct-acting solenoid valve plunger mounted in the middle of the cylinder valve chamber. Cylinder and piston diameter are divided into two big small. Above the top of the piston cylinder pressure stage work space, the air sucked into the cylinder through the filter. Annular space middle of the piston working space for the high pressure stage, the gas discharged from the low pressure stage through an inter-stage cooler into the higher pressure stage is further compressed. To ensure safety, low pressure stage and high pressure stage are provided with a safety valve, the opening pressure of the safety thereof were higher than the rated discharge pressure of approximately 15% and 10%. The motor drives the crankshaft rotates through elastic coupling, and then by connecting rod, piston pin to drive up and down reciprocating piston in the cylinder. When the piston dead point moves down from the top dead center, the air compressor in the intake process, the intake valve spring is compressed at this time, the downward movement of the valve, so the intake valve opens, suction gas. Pistons back row, that when the upward movement of the lower dead point from the beginning of the suction valve is closed, ie the valve spring force action by its upward movement to close contact with the seat position. When the smoke, exhaust valves are closed, continuing the upward movement of the piston, the gas in the cylinder is compressed, the pressure increases when the discharge pressure, exhaust valve compression spring valve that opens upward movement, ending the compression process. CKD proof solenoid valve is in direct contact with the bottom surface of high-temperature combustion products during the valve open also bear the high temperature (900 ~ 1000 ° C) and corrosive gases, high-speed (up to 600m / s) erosion, the valve core temperature of up to 700 ~ 800 ° C, the valve disc and stem transition circle in the middle, the temperature also has 600 ~ 700 ° C, the exhaust valve operating temperature distribution shown in Figure 1-1. Material thermal deformation. Reduce the mechanical properties of the high temperature causes the metal material, the material being thermally deformed. When the valve face Mifengbuyan, it will cause a high temperature gas valve face burning. CKD proof solenoid valve allows fluid viscosity generally 20CST less than 20CST should be noted. Working pressure, maximum pressure pipeline in less than 0.04MPa should choose ZS, 2W, ZQDF, ZCM series direct-acting and step direct-acting; optional Pilot (at minimum working pressure greater than the pressure 0.04MPa type) solenoid valve; maximum working pressure should be less than the maximum calibrated pressure solenoid valve; a one-way solenoid valves are working, so pay attention to whether there is anti-pressure, if installed check valve. Fluid cleanliness is not high when installing filters in front of the solenoid valve, solenoid valve on the media in general is better cleanliness requirements. Note that the amount of aperture and over caliber; solenoid valve generally only two control switches; To customize the solenoid valve opening and closing time adjustment when there is water hammer phenomenon; conditions allow, install a bypass pipe, ease of maintenance. CKD proof solenoid valve is normally closed and normally open divided into two kinds; generally used in the normally closed, power open, power off; but in the open for a long time is very short closed to choose a normally open. Life test, factories are generally the type of pilot projects, specifically China has not yet solenoid valve professional standards, so choose carefully when the solenoid valve manufacturers. Action for a short time at high frequency is generally selected direct-acting, fast series of large-caliber selection.