進口高性能雙偏心蝶閥性能描述 Performance description

高性能雙偏心蝶閥 采用一體式的S型彈性密封閥座結構，使用了RPTFE材料，彈性好，壽命長，可自動補償溫度和壓力的變化，以及因長期開關使用而磨損的密封補償；能達到雙向密封無泄漏；采用活動嵌件結構，保養快捷方便，不必拆卸蝶板和閥桿，只要單面取下壓盤，即可更換密封閥座和檢修密封面 RETZ The high-performance double eccentric butterfly valve adopts an integrated S-shaped elastic sealing seat structure, and uses RPTFE material, which has good elasticity and long service life. It can automatically compensate for temperature and pressure changes, as well as seal compensation for wear caused by long-term switch use; It can achieve two-way sealing without leakage; The movable insert structure is adopted for quick and convenient maintenance. It is not necessary to remove the butterfly plate and valve rod. As long as the pressure plate is removed on one side, the sealing valve seat can be replaced and the sealing surface can be repaired.

連接形式 Body Type

進口高性能雙偏心蝶標準與規范Standard and specification                                                                                                                                   

閥座設計特點 Valve seat design features

耐火結構 Fire resistant structure

耐火型閥門按API607經過火燒試驗 The fire resistant type valve is subjected to fire test according to API 607.

閥座類型Seat type

閥門關閉時蝶板使閥座稍稍變形，這一變形“激勵”了閥座，閥座密封面的激勵使它與蝶板的邊緣保持持久的密封 When the valve is closed, the butterfly valve seat is slightly deformed, the deformation of the "incentive" of the valve seat, the valve seat sealing surface to keep it with the edge of the disc to maintain a permanent seal

PTFE、R-PTFE、防火閥座等。PTFE,R-PTFE,Fireproofseat,etc.

軸的固定可靠Reliable fixing of shaft

軸的頂端有防吹出結構，在軸意外斷裂時防止軸的上部移竄出壓蓋 The anti-blow-out structure is providedat the top of the shaft to prevent the shaft from running out of the gland in case of accidental breaking of the shaft.

當壓盤側受壓時，壓力被施加于唇緣的下方進一步加大了蝶板與閥座之間的密封力 When insert the lateral compression, pressure is applied to further intensify the lip edge below the sealing force between valve disc and valve seat

偏置軸和偏心蝶板設計 Design of offset shaft and eccentric butterfly plate

在開啟和處于中間位置時閥座與蝶板不發生接觸 In open and in the middle position - seat and disc not contact

在閥座上下部位無磨損點 The seat part no wear points up and down

扭矩低，操作機構要求小 Low torque, small operator requirements

當壓力施加于非壓盤的一側時，蝶板被 推向閥座。由于蝶板的輪廓呈球形，蝶板越向閥座推進，關閉就越緊密。唇緣與壓盤底部的槽接觸，限制了閥座的過量移動When the pressure is applied to the side of the non insert piece, the butterfly plate is pushed to the valve seat. Because the outline of the butterfly plate is spherical, the butterfly plate to the seat forward, the closer the close. The lip edge is in contact with the groove at the bottom of the insert, limiting the excessive movement of the valve seat

閥座額定值 Seat rated value

閥曲線上表示的閥座額定值只對閥座而言，是基于閥門全閉是蝶閥兩端的壓差。這些額定值可做為通用條件下使用指南。依據以往經驗，經過改進和變換其他閥座材料，使用的額定值可更高

Valve curve on the seat rating for the seat, only is based on the full valve is closed Butterfly valves at the ends of the pressure difference. These ratings can be used as a general condition guidelines. In accordance with the According to past experience, the improved and other seat materials transformation, rating canbe used Higher. For special conditions, please contact the company engineers.

下表提供了150磅級蝶閥的流量系數。Cv值表示壓差為1磅/英寸（0.07巴），溫度為60°F(15.6℃）時每分鐘流過全開啟閥門的水流量，單位為美國加侖數/分鐘。

The following table provides a class 150 butterfly valve flow coefficient.Cv value indicates that pressure difference is 1 pounds per inch For 60 ° F (0.07 bar), temperature (15.6 ℃) per minute through the full open valve Of water flow, the unit for the number of gallons per minute

閥體額定值 Body rated value

閥體的最大工作壓力和各種材料閥體的試驗壓力示于下面的閥體壓力額定值表中。實際工況使用壓力要根據閥座額定值來決定 Maximum working pressure of the body and the body of various materials testing pressure valve is shown in the following Body pressure rating table. The actual working condition of using pressure rating to definitely according to the seat.

為確定中間位置閥門的CV值：To confirm cv value of the valve at the middle position:

1.從曲線表中確定最大CV值的百分率

2.將曲線表中的最大CV值的百分率乘以流量數據表中的CV值

零部件材質表 Parts material table