PUMP SIR

Selection of vertical fire pump 1) Ordinary fire pump Working condition 1: At the suction depth of 1m, it shall meet the requirements of rated flow rate (Qn) and rated pressure (Pn), and the working pressure shall not exceed 1.05 times of t……... Five causes of screw wear: 1, each plastic, there is an ideal plastic processing temperature range, the barrel processing temperature should be controlled to make it close to the temperature range. Granular plastic from the hopper into the……... In industrial production, the valve is a common control flow rate of the equipment, at the time of using ss gear pump installation, also often use the valve, the commonly used valve globe valve, butterfly valve, ball valve and gate valve is……