Three eccentric butterfly valve features and applications (2)

9, high seal packing structure Leakage in the valve, traditionally tend to focus on the seat leakage, that is, leakage, while ignoring the filler Department of leakage, that is, leakage. In fact, it is an indisputable fact that in the present-day society where the environmental issue is being increa

Introduction What is the general rule of relay protection?

(1) Power equipment and wiring in civil buildings should be equipped with short circuit fault and abnormal operation relay protection device. Protection of power equipment and short-circuit fault should be the main protection and backup protection, if necessary, additional protection can be added