The improved manual supercharging mechanism processes many channels on the intermediate plate, connecting the pump, reversing valve (20ram, 8MPa) and pipe joint as required, and the safety valve is also installed on the intermediate plate, which is very compact in structure. When the hand wheel rotates, the slider pushes two plungers to reciprocate, and the plunger pressurizes the oil in the closed chamber of the pump housing and then enters the drive system. The universal butterfly valve is used to realize the low-pressure suction and high-pressure discharge of oil. The pump is double acting, so the loading is stable and the efficiency is high. The technical characteristics of the hand pump are: the hand wheel discharges 2lml of oil every revolution, the nominal oil discharge pressure is 5.2MPa, and the maximum pressure can reach 8MPa. At the nominal pressure, the force applied to the hand wheel handle is 180N. In the actual use of the improved manual supercharging mechanism, I found that it not only improved the working efficiency, but also improved the shortcomings of unstable loading.

The nominal pressure of pneumatic butterfly valve refers to the maximum working pressure available at room temperature. The nominal pressure of pneumatic butterfly valve shall not be lower than the design pressure of main pipeline. For pneumatic butterfly valve with operating temperature ≥ 100 ℃, its working pressure must be included in the temperature correction coefficient. The rated working pressure of pneumatic butterfly valve for loading and unloading of liquefied gas tanker shall not be less than 4 times of the maximum working pressure of loading and unloading system.
The length of pneumatic butterfly valve shall be determined after calculation according to different uses and relevant rules.
When selecting pneumatic butterfly valves, it should be confirmed that the qualification of the consumer manufacturer, as well as the quality certificate and product application statement and other materials are complete.
The above introduction is the selection skills of pneumatic butterfly valve. If you want to understand more, please call us or go directly to our official website.