High Pressure Globe Needle Safety Valve
1) This type is high-pressure card cut-off valve planning than simple, manufacturing and repair are more convenient.
2) The sealing surface is not easy to wear and abrasion, good sealing, there is no relative sliding between the valve flap and sealing surface when opening and closing, so the abrasion and abrasion are not serious, the sealing function is good, and the service life is long.
3) When opening and closing, the flap stroke is small, so the height of the external thread stop valve is smaller than the gate valve, but the planning length is longer than the gate valve.
4) large opening and closing torque, opening and closing more strenuous, opening and closing time headmaster.
5) large fluid resistance, due to the media channel tortuous body, fluid resistance, power consumption.
6) When the nominal pressure PN is less than or equal to 16MPa, the media is normally used downstream and the media flows upwards from below the valve flap. When the nominal pressure PN≥20MPa, the countercurrent is usually selected, and the medium is lighter from the valve flap. To increase the seal can. When used, the external thread stop valve medium can only be one-way activities, can not change the direction of activity.1) This type is high-pressure card cut-off valve planning than simple, manufacturing and repair are more convenient.