双偏心蝶阀   

Double Eccentric Butterfly Valve

高性能蝶阀是本公司自行研制并引进欧洲先进技术转化产品。该蝶阀具有超独特的产品结构，超可靠的密封性能，超广阔的工况条件，超低小的操作扭矩，超长久的使用寿命，特殊工况安全防火，同类产品处于世界领先地位。

High performance butterfly valve is our company's own design product whichapply European advanced technologyThis butterfly valve has a uniquestructure with ultra reliable sealing performance, ultra wide working conditions.ultraow operating torque, ultra long service life, fire safe in special conditions.The high performance butterfly valve has aleading position compare to similarproducts around the world.

该系列高性能对夹式蝶阀使用多种结构材料，包括符合NACE要求和抗磨蚀的。并可提供用于氯气、氧气、高真空和腐蚀生介质及低温环境的特殊阀门。

The series of high performance wafer type butterfly,valves uses variousstructure materials,including those thatmeet NACE reguirements andanticorrosive materials.Special valves that can be used in chlorine,oxygen,high vacuumcorrosive media and cryogenic condition are also available.

特点 Features

-使用独特的动载密封PTFE阀座设计，弹性好，可靠性高;

-无须增加O形圈或金属部件来保持密封;

-唇缘式密封结构可补偿温度和压力的变化;

-使用寿命长，维修量小;

-密封试验，双向达到无气泡泄露。 - The unique dynamic load seal PTFE seat design is adopted with goodelasticity and high reliability.

-Sealing can be maintained without the need of adding 0 ring or metalpart.

-The lip type sealing structure can compensate for the changes oftemperature and pressure.

-Long service life and low maintenance. - In seal test, there is no bubble and leakage at both directions.

偏置轴和偏心蝶板设计

Design of offset shaft and eccentric butterfly plate

-在开启和处于中间位置时阀座与蝶板不发生接触;

-在阀座上下部位无磨损点; 扭矩低，操作机构要求小； - The seat and butterfly plate do not contact each other when thevalve is opened or at the middle position.

- There is no wear point at the upper and lower parts of the seat.

- Low torque with low requirement for operating mechanism.

耐火结构 Fire resistant structure

耐火型阀门按API607经过火烧试验

The fire resistant type valve is subjected to fire test according to API 607

闽座类型 Seat type

PTFE、R-PTFE、防火阀座等PTFE, R-PTFE, Fireproof seat, etc.

轴的固定可靠 Reliable fixing of shaft

轴的顶端有防吹出结构，在轴意外断裂时防止轴的上部移窜出压盖。

The anti-blow-out structure is provided at the top of the shaft to prevent the shaft from running out of the gland in case of accidental breaking of the shaft.

阀座维像保养方便 Convenient seat mainlenance and servicing

只要取下嵌件即可更换阀座，不必拆卸蝶阀和轴

The seat can be replaced just through removing the inserts without theneed of disassembling the butterfly valve and shaft

断流和控制兼备 Provided wilh shut-aff and control functions

-具有优良的控特性;

-流量特性曲线等比变化;

-调节范围广;

- 即使用于控制仍能紧密密封 。

- Having excellent control characteristics

- Proportional change of flow characteristic curve

- Wde adjusting range

- Tight sealing can be realized even when it is used for contral.

额定值

Rated value

阔座额定值

曲线上表示的阀座额定值只对阀座而言，是基于阀门全闭是蝶阀两端的压差。这些额定值可作为通用条件下使用指南。依据以往经验，经过改进和变换其他阀座材料，使用的额定值可更高。

Seat rated value

The seat rated values indicated on the curve are only for the seat. lt is thedifferential pressure between the two ends of the butterfly valve when the valveis fully closed. These rated values can serve as use guide under generaconditions. According to past experience, the rated values for improved andchanged other seat materials may be higher.

阀体额定值

阀体的最大工作压力和各种材料阀体的试验压力示于下面的阀体压力额定值表中。实际工况使用压力要根据阀座额定值来决定。

Body rated value

The maximum working pressure of body and testing pressure of body ofvarious materials are listed in the body pressure ratings table. The actualworking pressure in the working conditions shall be decided according tothe seat rated values.