LNG Globe Cryogenic Vacuum Pipeline Valve

Low-temperature shut-off valve is the closing piece (valve flap) moves along the centerline of the valve. Depending on the type of movement of the valve disc, the change in valve seat opening is in direct proportion to the valve disc stroke. Due to the valve stem of this type of valve opening or closing stroke is relatively short, but also has a very reliable cut-off function, but also because the valve seat opening changes in direct proportion to the valve stroke, very suitable for the regulation of flow. Therefore, this type of valve is ideally suited for shut-off or regulation as well as throttling.
Features
Structure than the simple valve, manufacturing and maintenance are more convenient.
Sealing surface is not easy to wear and abrasion, good sealing, opening and closing the valve and the valve body sealing surface between no relative sliding, so wear and abrasion are not serious, good sealing performance, long service life.
When opening and closing, the valve stroke is small, so the height of the valve is smaller than the gate valve, but the structure length is longer than the gate valve.
Opening and closing torque, opening and closing more effort, opening and closing time longer.
Large fluid resistance, because the valve medium channel more tortuous, fluid resistance, power consumption.
When the nominal pressure of medium flow direction is PN≤16MPa, it generally adopts downstream flow and the medium flows upwards from below the valve flap. When the nominal pressure is PN≥20MPa, countercurrent is generally adopted and the medium flows downward from the valve flap. To increase the seal can. When used, the globe valve medium can only flow in one direction, can not change the flow direction.
When the valve is fully open erosion.

Low-temperature shut-off valve is the closing piece (valve flap) moves along the centerline of the valve. Depending on the type of movement of the valve disc, the change in valve seat opening is in direct proportion to the valve disc stroke. Due to the valve stem of this type of valve opening or closing stroke is relatively short, but also has a very reliable cut-off function, but also because the valve seat opening changes in direct proportion to the valve stroke, very suitable for the regulation of flow. Therefore, this type of valve is ideally suited for shut-off or regulation as well as throttling.
Features
Structure than the simple valve, manufacturing and maintenance are more convenient.
Sealing surface is not easy to wear and abrasion, good sealing, opening and closing the valve and the valve body sealing surface between no relative sliding, so wear and abrasion are not serious, good sealing performance, long service life.
When opening and closing, the valve stroke is small, so the height of the valve is smaller than the gate valve, but the structure length is longer than the gate valve.
Opening and closing torque, opening and closing more effort, opening and closing time longer.
Large fluid resistance, because the valve medium channel more tortuous, fluid resistance, power consumption.
When the nominal pressure of medium flow direction is PN≤16MPa, it generally adopts downstream flow and the medium flows upwards from below the valve flap. When the nominal pressure is PN≥20MPa, countercurrent is generally adopted and the medium flows downward from the valve flap. To increase the seal can. When used, the globe valve medium can only flow in one direction, can not change the flow direction.
When the valve is fully open erosion.

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