The gate valve is used as a cut-off medium, and when the whole flow through is fully open, the pressure loss of the medium operation is minimal. Gate valves are usually suitable for not requiring frequent opening and keeping the gates fully open or closed. Not applicable for use as a regulation or for throttling. For high-speed flowing medium, the gate can cause the vibration of the gate under local opening conditions, and the vibration may damage the sealing surface of the gate and the valve seat, and the throttling will make the gate eroded by the medium.

① Domestic design standard: GB / T12224 GB / T12234 NB / T47044 GB / T28776
Diameter and corresponding pressure range: DN10-1000 (PN16-PN100)
DN10-600 (PN16-42MPa, P54, P57 series)
② Foreign design standard: ASME B16.34 ISO 10434 API600 API602
Diameter and the corresponding pressure range:
NPS½ - 60（CLASS150-600）
NPS½ - 24（CLASS900-2500）
Main materials: carbon steel, stainless steel, alloy steel
Connection type: butt welding end and flange end
Operation type: manual and electric operation