进口高性能双偏心蝶阀性能描述 Performance description

高性能双偏心蝶阀 采用一体式的S型弹性密封阀座结构，使用了RPTFE材料，弹性好，寿命长，可自动补偿温度和压力的变化，以及因长期开关使用而磨损的密封补偿；能达到双向密封无泄漏；采用活动嵌件结构，保养快捷方便，不必拆卸蝶板和阀杆，只要单面取下压盘，即可更换密封阀座和检修密封面 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.

连接形式 Body Type

进口高性能双偏心蝶标准与规范Standard and specification                                                                                                                                   

阀座设计特点 Valve seat design features

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.

阀座类型Seat type

阀门关闭时蝶板使阀座稍稍变形，这一变形“激励”了阀座，阀座密封面的激励使它与蝶板的边缘保持持久的密封 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、防火阀座等。PTFE,R-PTFE,Fireproofseat,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 providedat the top of the shaft to prevent the shaft from running out of the gland in case of accidental breaking of the shaft.

当压盘侧受压时，压力被施加于唇缘的下方进一步加大了蝶板与阀座之间的密封力 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 In open and in the middle position - seat and disc not contact

在阀座上下部位无磨损点 The seat part no wear points up and down

扭矩低，操作机构要求小 Low torque, small operator requirements

当压力施加于非压盘的一侧时，蝶板被 推向阀座。由于蝶板的轮廓呈球形，蝶板越向阀座推进，关闭就越紧密。唇缘与压盘底部的槽接触，限制了阀座的过量移动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

阀座额定值 Seat rated value

阀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。这些额定值可做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

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磅级蝶阀的流量系数。Cv值表示压差为1磅/英寸（0.07巴），温度为60°F(15.6℃）时每分钟流过全开启阀门的水流量，单位为美国加仑数/分钟。

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

阀体额定值 Body rated value

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 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.

为确定中间位置阀门的CV值：To confirm cv value of the valve at the middle position:

1.从曲线表中确定最大CV值的百分率

2.将曲线表中的最大CV值的百分率乘以流量数据表中的CV值

零部件材质表 Parts material table