Precautions for valve application in fire pipeline 1. When the outlet pipe diameter of the fire pump is greater than 300mm, a valve with a single manual opening and closing function should not be used. The valve should have obvious opening and closing signs, and the remote control valve should...

What are the reasons for valve pump casting defects in the production 1. Stomata This is a small cavity formed inside the metal by the gas that failed to escape during the solidification of the metal. Its inner wall is smooth, contains gas, and has a high reflectivity for ultrasonic waves, but...

pump impeller