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1、 Instruction ManualVBSSoft Seal Butterfly ValveChuanyi Instrument No.11 Factory Co., Ltd. ChongqingVBS Soft Seal Butterfly Valve1、summarizationVBS pneumatic soft seal butterfly valve is the new generation of high performance quality product which assembled by pneumatic actuator and double eccentric
2、high performance butterfly valve. It has fine cut-off function and lasting quality, and both the adjustment and cut-off functions of economical automatic valves are available. For the characteristic of big circulation ability, light weight, easy service of maintains, low leakage rate and high cost p
3、erformance, it widely used in industrial process control or inflammable and explosive occasion such as metallurgy, petroleum, chemical industrial, electric power, food, water supply and gas supply, etc.2、Structure and operating principleVBS soft seal butterfly valve is assembled by DA (SR), AW (AWS)
4、 series pneumatic piston actuator and VBS valve body parts (See Fig.1, Fig 2 and Fig.3). The valve can be matched with hand wheel and manual operated when the gas is failure. The valve can be either quick opening or closedown when assembled with solenoid valve, and if installed with positioner, the
5、valve can be intelligentized.1、StructureIt is mainly composed of pneumatic piston actuator, valve body, disk, lock ring, valve shaft, joint sleeve, etc.挡 块Holddownplate填 料 垫Packingseat轴 销Axlepin六 角 螺 母Nut阀 体Body填 料 压 板Glandflange双 头 螺 栓Studbolt填 料 压 盖Glandpacking填 料Packing阀 座SeatO型 圈Ring轴 承Bearing阀
6、杆Stem阀 板Disc压 圈Clampingring开 槽 沉 头 螺 钉Slottedconntersunkheadscrews压 紧 圈Hold-downring六 角 头 螺 栓Hexagonbolt对 开 环Splitcollar密 封 垫Gasket端 盖Endcover对 开 环Splitcollar密 封 垫Gasket端 盖EndcoverDN150以 上 结 构 DN80150VBS Soft Seal Butterfly ValveLH2BH1Fig.1 The outline dimension of the valve and DA（SR）actuator combi
7、nedFig.2 The outline dimension of the valve and AW(S) combinedLH2BH1VBS Soft Seal Butterfly Valve图 3 配 AW 双作用执行机构结构及外形尺寸图Fig.3 The outline dimension of the valve and AW combined2、Operating principleThe input signal from actuator inputting in diaphragm gas room through pipe connection can produce thr
8、ust force on corrugated diaphragm, which drives the pallet moving and compresses the spring until balancing with counterforce of the spring. The moving of the pallet drives the push pole to move down. The top and bottom connecting rod linking with the push pole moves down to revolve the crank around
9、 the axes of butterfly valve, therefore the flow area changes to control the medium flux. DA（ SR）series actuator can match with the following hand wheel （ZHJ series）. Please refer to the following instruction:VBS Soft seal butterfly valve can be divided into FO (Indicated by B) and FC(Indicated by K
10、) type according to the different action type. FO type: The circulation area reduces while the input signal is increasing. FC: The circulation area enlarges while the input signal is increasing. BLH2H1VBS Soft Seal Butterfly ValveDA（SR ）series actuator can match with the following hand wheel （ZHJ se
11、ries）. Please refer to the following instruction:3、AW double-acting actuatorStructure：AW Pneumatic actuators consist of housing, piston, axes, gas cylinder, limit stud and holder, etc. See Fig.4 and Fig.5。ON OFFPullout RetainingmechanismManuallyoperationHandleverSelf-motionManuallyoperationself-moti
12、on1.Takeholdoftheballsleeveoftheretainingmechnismandpulloutit.2.Takeholdoftheheadofthehandlever,rotateclockwisefromONpositiontoOFFposition,thenreleasetheretainingmechanismtocompletetheoperation.self-motionManuallyoperation1.Takeholdoftheballsleeveoftheretainingmechnismandpulloutit.2.Takeholdofthehea
13、dofthehandlever,rotateclockwisefromOFFpositiontoONposition,thenreleasetheretainingmechanismtocompletetheoperation.ZHJhandwheelManuallyoperationself-motionself-motionManuallyoperationswitchoverdiagrammaticsketch体 体 体 体体 体 体体 体体 体 体 体 体 体体 体体 体 体 体 体 体 体 体 Housing Hexagon socket head cap screws Piston
14、 rod Piston Cylinder body Nut Dumy plate Gas uply port VBS Soft Seal Butterfly ValveFig.4 The structure diagrammatic sketch of AW17, AW20 and AW28 double acting cylinder actuatorAxialelasticcollarDummyplateNutCylinderbodyShiftingyokeHousing PistonrodHexagonsocketsetscrewsHexagonsocketheadcapscrewsPi
15、stonVBS Soft Seal Butterfly ValveFig.5 The structure diagrammatic sketch of AW13 doubles-acting cylinder actuatorOperating principle: After the gas source is connected with right (left) air intake (Two), the gas enters in right (left) cylinder body to impel the piston to the left (right). The piston
16、 drive the piston rod together acting, the piston rod dials shifting yoke to anti-clockwise (clockwise) turning, thereby drive the main arbor acted anti-clockwise (clockwise) turning and output torque. The main arbor will keep in original position after loses pressure, and it can be in original position if only the air enters in left (right) intake port.The manual operation of double-acting type
