When the electric cut-off valve is in the open state, there is no contact between its valve seat and valve sealing surface, so its sealing surface mechanical wear is small. In the process of opening and closing, the friction between the valve flap and the sealing surface of the valve body is smaller than that of the gate valve, so it is wear-resistant. Open height is generally only 1/4 of the diameter of the seat channel, so much smaller than the gate valve. Usually there is only one sealing surface on the valve body and the valve clack, so the manufacturing process is better and easy to repair. The flow direction of the medium through such valves has changed, so the flow resistance of the electric stop valve is higher than other valves.
selection of electric globe valve:Electric cut-off valve is commonly used in electric cut-off valve, electric throttle valve, electric angle cut-off valve, electric direct flow cut-off valve, electric plunger cut-off valve, etc.
1. Angle type electric cut-off valve: In the angle type electric cut-off valve, the fluid only needs to change the direction, so that the pressure drop through the valve is smaller than the electric cut-off valve of the regular structure.
2. DC electric cut-off valve: electric cut-off valve In DC or Y-shaped electric cut-off valve, the flow channel of the valve body forms an oblique line with the main flow channel, so the degree of damage to the flow state is smaller than that of the regular electric cut-off valve, so the pressure loss through the valve is correspondingly small.
3. Plunger type electric stop valve: In this valve, the valve disc and valve seat are usually designed based on the principle of plunger. The valve clack is polished to connect the plunger and the valve stem, and the seal is realized by two elastic sealing rings on the plunger. The two elastic sealing rings are separated by a collar and the sealing rings around the plunger are pressed firmly by the load applied to the bonnet by the bonnet nut.
Application of electric stop valve:
Electric cut-off valve if used in high-pressure occasions, are generally welded connection, or use electric angle cut-off valve. According to the material can choose carbon steel or 304 stainless steel, if the temperature is relatively high, you need to choose chromium molybdenum steel or chromium molybdenum vanadium steel.
