Reciprocatingpump discharge pipe must be before the start of the valve to open.
往复泵启动前必须将排出管路中的阀门打开。
2
The actual flow reciprocatingpump flow rate than theory, and with the increased pressure head decreases, which is due to leakage caused.
往复泵的实际流量比理论流量小，且随着压头的增高而减小，这是因为漏失所致。
3
The accuracy of traditional spectrum analysis for the diagnosis of reciprocatingpump valve is not satisfied for the interference of the noise and the vibration of the adjacent parts.