PRODUCTS > Gate valve > Power Station Valve

                  Power Station Valve

                  Product model: Z960Y
                  Nominal pressure: CL900 ~2500Lb, PN150~420MPa
                  Nominal diameter: NPS2"~20", DN50 ~ DN500mm
                  Main material: carbon steel, alloy steel
                  Applicable temperature: -29℃~+600℃

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                  [Essential information]

                  Opening process
                  1, in the closed position, the valve body is mechanically pressed by the valve stem and tightly pressed on the valve seat.
                  2, when turning the handwheel counterclockwise the valve stem is reversed and its bottom angle plane causes the ball to disengage from the valve seat.
                  3, the stem continues to ascend and interacts with the guide pin in the stem spiral so that the ball begins to rotate without friction.
                  4, until the fully open position, the stem reaches the limit position, and the ball rotates to the fully open position.

                  Closing process
                  1, turn the handwheel clockwise when the valve closes. The stem begins to fall and the ball begins to rotate away from the seat.
                  2, continue to rotate the handwheel, the stem is inserted in the spiral groove in the guide pin role, so that the stem and gate simultaneously rotating 90 degrees.
                  3, when it is about to close, the gate has been rotated 90 degrees without contact with the valve seat.
                  4, in the last few turns of the handwheel, the angle plane at the bottom of the valve shaft is mechanically wedged against the compression sphere, making it tightly pressed against the valve seat to reach full seal.


                  [Valve structure drawing]

                  [Standard parameter]

                  Design standardAPI 600、ASME B16.34、DL/T 531、JB/T3595
                  Structural lengthDL/T 531、ASME B16.10、GB/T 12221
                  Connection standardDL/T 531、JB/T3595、ASME B16.25
                  Pressure testAPI 598、GB/T 13927、JB/T 9092
                  Pressure temperature ratingAPI 598、GB/T 13927、GB/T 26480、JB/T9092、JB/T3595


                  [valve features]
                  1, the valve cavity using pressure tight sealing structure, good sealing performance.
                  2, the valve, valve seat sealing surface cobalt based carbide alloy surfacing, wear-resistant, high temperature, good scratch resistance, long service life.
                  3, The valve stem is treated by corrosion resistance and nitriding. It has good corrosion resistance and scratch resistance.
                  4, high temperature creep design.
                  5, the valve cover stuffing box depth reasonable, filler plus corrosion inhibitor, sealed reliable.
                  6, the valve has an upper sealing structure, to ensure that the valve opens when running, the valve stem will not leak.
                  7, the valve drive mode manual, gear drive, electric, remote control and automation requirements can be achieved.


                  [Adaptive condition]
                         The utility model relates to a gate valve of a power station (main steam gate valve), which is suitable for pipelines of hot water, steam, oil, and superheated steam at a high temperature and a high temperature, such as a power plant, an oil chemical industry, metallurgy, etc..


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