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High-temperature globe valve is a valve in which the closing member (valve flap) moves along the centerline of the valve seat. According to this form of movement of the valve flap, the change of the seat orifice is proportional to the valve flap stroke. Since the stem opening or closing stroke of this type of valve is relatively short and has a very reliable shut-off function, and since the change in the seat orifice is proportional to the travel of the valve flap, it is very suitable for regulating the flow rate. Therefore, this type of valve is very suitable for cutting off or regulating and throttling. Applicable to petroleum, chemical, electric power, metallurgy, pharmaceutical, food, water treatment, municipal water supply and drainage, natural gas, paper, electronic industry, buildings, mechanical equipment and other fields.
1, the structure is simpler than the gate valve, manufacturing and maintenance are more convenient.
2, the sealing surface is not easy to wear and abrasion, good sealing, opening and closing of the valve flap and the valve body sealing surface of the relative sliding between the flap and the valve body, and thus the wear and abrasion are not serious, good sealing performance, long service life.
3, opening and closing, the flap stroke is small, so the height of the globe valve is smaller than the gate valve, but the length of the structure is longer than the gate valve.
4, opening and closing torque, opening and closing more laborious, opening and closing time principal.
5, fluid resistance, because the valve body media channel is more zigzag, fluid resistance, power consumption.
6, the direction of media flow Nominal pressure PN ≤ 16MPa, generally used downstream, the media from the valve under the direction of upward flow; Nominal pressure PN ≥ 20MPa, generally used countercurrent, the media from the valve on the direction of downward flow. To increase the sealing energy. When used, the cut-off valve medium can only flow in one direction, can not change the flow direction.