以下是带快开功能的等量跟踪减温减压器阀门控制逻辑要求：一、阀门需要信号：1、阀门控制信号20-4mA.此信号用于控制阀门在没有跳车时，对阀门的调节。

2、透平抽气流量跟踪信号20-4mA（跳车指定位置信号）：此信号来自抽气流量转换为阀门开启信号加上阀门当时开启的开度信号，具体说明如下：透平抽气跟踪流量信号=阀门目前开度+抽气流量信号抽气流量信号：透平抽气流量对应阀门的开度--由阀门特性曲线找到对应的点。

以2#阀门为例：由于阀门特性曲线为非线性结构，故而要以阀门当前的开度为基础作为相对零点，找到阀门相对应的开度信号，比如，当前阀门为30%，就要从特性曲线中找到相对应的流量百分比即：25%。

阀门数据表中显示阀门流量最大值可通过附件中的阀门数据表查找到，列如2#阀门为150T,。

然后找到这点之后，再把抽气流量，列如为30t，对应的流量百分比为20%最后透平抽气流量的流量百分比为，25%的基础上增加20%，也就是此时对应的流量百分比为45%，然后通过阀门特性曲线，寻找到阀门开度应为47%。

这是就需要把这个47%的阀位，转换成电信号20-4mA，作为“透平抽气流量跟踪信号”传递给阀门。

需要指出的是：抽气流量的数值具体从哪里得到，这是设计机组的时候应该就已经决定了的，需要咨询设计院。

我们的阀门只是被动接受信号，信号的来源跟阀门本身没有关系。

3、透平跳车信号（24V二进制开关量），阀门在汽机没有跳车时，这个信号为常闭信号；汽机跳车时，需要断开这个二进制信号。

具体信号来自汽机系统的什么地方，需要设计院确认。

4、阀门反馈信号（20-4mA），返回给DCS。

二、阀门常规调节控制逻辑要求：阀门在平常调节时，需要所有的信号在20-4mA的范围以内，阀门控制信号以及透平抽气流量跟踪信号均不能低于4mA,否则阀门速度控制器，将会出现报警信息。

阀门在平常调节时，要求透平跳车信号为常闭信号，需要DCS 给予阀门+24V的电压。

阀门在平常调节时，阀门控制信号以及透平抽气流量跟踪信号均需要输入到阀门内，此时阀门只受“阀门控制信号”控制。

三、阀门快开控制逻辑要求：阀门在快开前，阀门控制信号以及透平抽气流量跟踪信号均需正常给予阀门快开时，需要给阀门一个跳车信号，即：透平跳车信号（24V二进制开关量）为失电状态断开。

此时阀门受透平抽气流量跟踪信号控制，具体参见附件中的阀门速度控制器说明。

四、阀门快开结束逻辑要求：阀门在快开结束之后，需要把跳车信号恢复，此时阀门再次受到“阀门控制信号”控制。

阀门在从跳车状态恢复到调节状态的过程中，逻辑上要求在这个转换过程中实现阀门无扰动。

德国宝马阀电子式等量跟踪快开减温减压阀控制说明德国宝马阀电子式等量跟踪快开减温减压阀气动执行机构的“等量跟踪快开电子控制柜”集快速和精确调节功能为一体。

完成透平正常运行时，快开减温减压阀对透平抽气流量的等量跟踪；透平跳机时，快开减温减压阀对透平抽气流量的无扰动等量快开切换。

该“等量跟踪快开电子控制柜”主要部件为电子控制元件.它能够根据透平不同的抽气流量工况，在透平跳机时，通过控制柜内部的比例阀和3/2 通电磁阀之间自动控制切换，完成快开减温减压阀对透平抽气流量的无扰动等量快开切换。

一“等量跟踪快开电子控制柜”部件描述：具有调节功能及等量跟踪快开功能的减压阀PV 的气动控制系统详见No.3L11538/C 图减压阀PV 气动控制系统主要包括以下几个部分:1，一个容纳电子控制器件的柜子(柜子装于气动执行器附近的单独支架上)2，一个空气供应站(部件10)包括过滤器,减压阀和压力表3，一个电动-气动比例阀(部件20)用于控制减温减压阀PV 4，两个压力表(部件40)5，一个带有消音器(部件61)的3/2 通电磁阀(部件60)用作快开减压阀门PV 的先导操作6，消音器(部件75)的两个气动3/2 通阀(部件70,71)用于减压阀PV 的快开操作7，一个等量跟踪电子控制箱8，一个带有安全阀和止回阀的储气罐(部件80)，储气罐是按照减压阀PV 两个完整冲程的要求设计的.9，一个双动作气动气缸PZ16C-400/56X55 D (部件90)用于调节及快开减压阀PV10，一个阀位变送器(部件91)用于反馈信号(4-20mA),阀位变送器安装于气动执行器上(部件90)二，“等量跟踪快开电子控制柜”控制描述压缩空气在空气站（件10）内经过滤并减压压至3.5bar(g)。

快开减温减压阀PV 正常调节控制:快开减温减压阀PV 在正常开关调节，是由DCS 输出20-4mA 信号给等量跟踪快来电子控制柜的电-气比例阀，及阀位开度反馈20-4mA 信号给电-气比例阀来完成。

与此同时,通过透平的蒸汽流量对应的阀门开度，转化为20-4mA 信号也是通过DCS送至等量跟踪快开电子控制柜,该信号在透平正常运行时，不会影响到减压阀的正常调节，此时，3/2 通电磁阀带电。

快开减温减压阀PV 正常调节是通过对比阀位设定值和阀位的实际值，得到一个控制偏差值.此偏差通过等量跟踪快开电子控制柜的电-气比例阀(部件20)，使快开减温减压阀PV 将调整开度状态直至偏差为零，完成调节功能。

阀位实际值是通过将超声波位置检测系统(部件91)集成至气动执行机构(部件90)的方式把一个20-4mA 电流信号(对应于0-100%行程)反馈给等量跟踪快开电子控制柜(速度控制器).20mA=阀门关闭(0%);4mA=阀门开启(100%)最终设定值/实际值通过的对比可以使减压阀精确的开启在预设的位置上.蒸汽透平跳机(快开减温减压阀PV 快开):汽轮机跳机的二进制信号是由DCS 传送给等量跟踪快开电子控制柜的.根据程序的设定,当3/2 通电磁阀(部件60;快开用先导阀)处于失电且压缩空气通过气动3/2 通阀(部件70,71)放空.此时,气动3/2 通阀(部件70,71)为失气状态。

快开减温减压阀PV 借助压缩空气储罐(部件80)内的压缩空气打开，当快开减温减压阀PV 即将到达蒸汽透平流量设定值时,电控箱内的程序（使用前减压阀必须校准）将会使3/2 通电磁阀(部件60)重新带电及两个气动3/2 通阀(部件70,71)复位.同时,减压阀PV 将由电-气比例阀(部件20)控制并调整余下的蒸汽流量升至设定值,而不会超调.减压阀PV 在汽轮机紧急停机时快开时间约为0.5 秒.随后中控系统(DCS)将在通过汽轮机的蒸汽流量的设定值(20-4mA)和电-气比例阀(部件20)的协助下完成控制任务.当来自DCS的蒸汽透平跳机信号复位时,电控箱(速度控制器)内的程序将再次改变,快开减温减压阀PV 将像最初时一样能够被来自DCS 的阀位输入的20-4mA 信号，及阀位开度反馈给等量跟踪快开电子控制柜的电-气比例阀20-4mA 信号，通过等量跟踪快开电子控制柜的电-气比例阀完成正常的快开减温减压阀PV 调节控制. 27x0201,27x0202pieces 1Tag No.: CustomerDimen- C Englisch XNo. sion M1.011.02 DN C/M1.03 PN C/M1.04 mm C1.05 C1.06 C1.07 C/M1.08 barg / °C C1.09 bar M 220 931.101.11 °C C1.12 bar/a C/M2.012.02 C2.03 t/h C2.04 Pressure p1 bar/a C2.05 Temp. t1 °C C2.06 Speed w1 m/s C/M2.07 Outlet Pressure p2 bar/a C2.08 Temp. t2 °C C2.09 Speed w2 m/s C/M2.10 Wet steam ts °C M2.11 m³/h M2.12 C/M2.13 sec. C3.013.02 mm M3.03 M3.04 C X3.05 Mounting position C/M v o h3.06 B C/M3.07 C/M3.08 M3.09 C/M X3.10 Pieces. M 1 13.11 mm M 97 90 403.12 Pieces. M3.13 M X3.14 M X3.15 M X3.16 M X3.17 M X3.18 M X3.19 M X3.20 M X 23.21 Pieces M3.22 M3.23 M 13.24 M3.25 M3.26 M 1 1803.27 M3.28 M X3.29 C/M 1.7383 1.7383 1.73833.30 C/M3.31 M 1.7383 1.4923 1.49233.32 M 1.49233.33 M Grafit Grafit Grafit3.34 M3.35 M3.36 85 dB(A) C/M3.37 M kg kg3.38 X M 6.7 t/h 140 bar(a) 1583.39 M DN 25 PN 250 Number3.40 Connection M3.41 Acceptance acc. to PED 97/23/EC L Category others4.014.024.034.044.054.064.07 Revision4.08 04.094.104.11 M to be filled in by BOMAFA4.12 C to be filled in by customer4.13 License of Customer Signature: DatePhone:+49 / 2327 / 992-0 Fax:+49 / 2327 / 31443E-Mail: info@bomafa.deD - 44866 Bochum Hohensteinstr. 52BOMAFA Armaturen GmbHDate256 2011-03-11Modifications Row NameFirm PhoneBOMAFAShi/BaumgardtRemarksQuantity Waterpr. Watertemp.Design data: Press./Temp. bar/°C 155/172injection waterWater studDesignNoise emission (insulated) Wall thickness of the outlet piping must be total at least 15 mm weight of the Valve without Actuator with actuatorPacking material for: Stem Seat bush Cover lockCool. water Flange 1.5415 Warm up stud Draining con. Stud 1.7335 Insert Seat bush PlugPerforated bush Orifice Plug nutMaterialsInlet Body OutletActuatorMulti-turn actuator Flap actuator Thrust actuatorHydraulic actuator Pneumatic actuator HandwheelAdditionalBellow Preheater conn. stud Cooler body/Pro.PlateBonnet / Protective grating Dome for nozzle Nominal width DomeSwelling steam delivery over Seat bush to cooler body to center nozzleWater injection Center nozzle Seat bu./Ann. Cap/Lance Cooler body for nozzlesSteam filter single doubleSilencer at valve outlet Number of orifice Number of perf. Plate Throttle labyrinth Pressure relief inserts Seat bush as throttle bush Number of throttle bush Red.- steps total Plug type Flatplug Parabolic plug Perforated plugSealing of the stem relief space piston rings packing of pure graphiteValve plug fully relieved partly relieved with control spindleValve seat armoured nitride dynamic double seatSeat bush removable removable/self-sealing weldedValve insert cramped self-sealing with swelling steam con.Fixed point (Valve) Bracket at body Rubber-bounded BaseDrain-/ Warm up-/ Swelling steam - stud/pip. DN 25 DN 40 PipingDesign Seat diameter Stroke Plug stem diameterWelding stud at the body Inlet Outlet Dished boiler endBody construction Cast steel Forged steel WeldmentActuator design Body size 5Leakrate ANSI/FCI Class IV RangeabilityConstruction Angle design Straight-way design Z-designValve type Dim. Sheet R4629-MValve Data Control ValveNominal width of body connection Inlet 150 Outlet 250Floating time for full stroke Adjustment Quick-opening 0,5 Quick-closingKvs - ValueType of characteristic line equal % linear X Special designFluidic parameter Kv - Value444 444 44441 41 4166,68 60,66 69,20535 540inlet 99.1 89.3 99.1540110 70 1506Medium Steam Steam SteamCapacityclosedOperating Data Case No. 1 2 3 4Ambience condition5p actuator design openDesign data (assumed): Pressure / Temp. 104/545 49/510Material: Welding end / Piping 1.7380 1.7380Seal design for flangeWelding groove / Flange design BW BWx xNominal pressure 420 63PipingDesign Data Inlet Outlet Inlet OutletCustomer order n.: EntriesValveNominal width 150 250 12Cr1MoV 15CrMoGDimension of pipe connectionInstallation Series 27X0201 Meike chemical industry Type of Valves Reducing valve with quick-opening function Item 1.1 Data Sheet Valves Com. No.:Test pressure (T = RT )CoatingModuleBOMAFA standard: Feidozink - S zink dust paint grey mattSpindle vertical / horizontal (v/h)) actuator above / under (a/u)) Inl. horiz./above/under(h/a/u)Connecting coefficient V = 1 Evaluation group (in accordance with DIN EN ISO 5817 a.2517)Direction fo flowLeakage / Rangeability Leakage∆OD ODpieces 1Tag No.: CustomerDimen- C Englisch XNo. sion M1.011.02 DN C/M1.03 PN C/M1.04 mm C1.05 C1.06 C1.07 C/M1.08 barg / °C C1.09 bar M 220 931.101.11 °C C1.12 bar/a C/M2.012.02 C2.03 t/h C2.04 Pressure p1 bar/a C2.05 Temp. t1 °C C2.06 Speed w1 m/s C/M2.07 Outlet Pressure p2 bar/a C2.08 Temp. t2 °C C2.09 Speed w2 m/s C/M2.10 Wet steam ts °C M2.11 m³/h M2.12 C/M2.13 sec. C3.013.02 mm M3.03 M3.04 C X3.05 Mounting position C/M v o h3.06 B C/M3.07 C/M3.08 M3.09 C/M X3.10 Pieces. M 1 13.11 mm M 90 80 403.12 Pieces. M3.13 M X3.14 M X3.15 M X3.16 M X3.17 M X3.18 M X3.20 M X 23.21 Pieces M3.22 M3.23 M 13.24 M3.25 M3.26 M 1 1803.27 M3.28 M X3.29 C/M 1.7383 1.7383 1.73833.30 C/M3.31 M 1.7383 1.4923 1.49233.32 M 1.49233.33 M Grafit Grafit Grafit3.34 M3.35 M3.36 85 dB(A) C/M3.37 M kg kg3.38 X M 17.7 t/h 140 bar(a) 158 3.39 M DN 50 PN 250 Number3.40 Connection M3.41 Acceptance acc. to PED 97/23/EC L Category others4.014.024.034.044.054.064.07 Revision4.08 04.094.104.11 M to be filled in by BOMAFA4.12 C to be filled in by customer4.13 License of Customer Signature: DatePhone:+49 / 2327 / 992-0 Fax:+49 / 2327 / 31443E-Mail: info@bomafa.deD - 44866 Bochum Hohensteinstr. 52BOMAFA Armaturen GmbHDate256 2011-03-11Modifications Row NameBOMAFAShi/BaumgardtRemarksQuantity Waterpr. Watertemp.Design data: Press./Temp. bar/°C 155/172injection waterWater studDesignNoise emission (insulated) Wall thickness of the outlet piping must be total at least 15 mm weight of the Valve without Actuator with actuatorPacking material for: Stem Seat bush Cover lockCool. water Flange 1.5415 Warm up stud Draining con. Stud 1.7335 Insert Seat bush PlugPerforated bush Orifice Plug nutMaterialsInlet Body OutletActuatorMulti-turn actuator Flap actuator Thrust actuatorHydraulic actuator Pneumatic actuator HandwheelAdditionalBellow Preheater conn. stud Cooler body/Pro.PlateBonnet / Protective grating Dome for nozzle Nominal width DomeSwelling steam delivery over Seat bush to cooler body to center nozzleWater injection Center nozzle Seat bu./Ann. Cap/Lance Cooler body for nozzlesSteam filter single doubleSilencer at valve outlet Number of orifice Number of perf. Plate Throttle labyrinth Pressure relief inserts Seat bush as throttle bush Number of throttle bush Red.- steps total Plug type Flatplug Parabolic plug Perforated plugSealing of the stem relief space piston rings packing of pure graphiteValve plug fully relieved partly relieved with control spindleValve seat armoured nitride dynamic double seatSeat bush removable removable/self-sealing weldedValve insert cramped self-sealing with swelling steam con.Fixed point (Valve) Bracket at body Rubber-bounded BaseDrain-/ Warm up-/ Swelling steam - stud/pip. DN 25 DN 40 PipingDesign Seat diameter Stroke Plug stem diameterWelding stud at the body Inlet Outlet Dished boiler endBody construction Cast steel Forged steel WeldmentActuator design Body size 5Leakrate ANSI/FCI Class IV RangeabilityConstruction Angle design Straight-way design Z-designValve type Dim. Sheet R4629-MValve Data Control ValveNominal width of body connection Inlet 150 Outlet 350Floating time for full stroke Adjustment Quick-opening 0,5 Quick-closingKvs - ValueType of characteristic line equal % linear X Special designFluidic parameter Kv - Value310 310 31013 13 13535 540inlet 99.1 89.3 99.1540103 70 1506Medium Steam Steam SteamCapacityclosedOperating Data Case No. 1 2 3 4Ambience condition5p actuator design openDesign data (assumed): Pressure / Temp. 104/545 49/510Material: Welding end / Piping 1.7380 1.7380Seal design for flangeWelding groove / Flange design BW BWx xNominal pressure 420 63PipingDesign Data Inlet Outlet Inlet OutletCustomer order n.: EntriesValveNominal width 150 450 12Cr1MoV CSDimension of pipe connectionInstallation Series 27X0202 Meike chemical industry Type of Valves Reducing valve with quick-opening function Item 2.1 Data Sheet Valves Com. No.:Test pressure (T = RT )ModuleBOMAFA standard: Feidozink - S zink dust paint grey mattSpindle vertical / horizontal (v/h)) actuator above / under (a/u)) Inl. horiz./above/under(h/a/u)Connecting coefficient V = 1 Evaluation group (in accordance with DIN EN ISO 5817 a.2517)Direction fo flowLeakage / Rangeability Leakage∆OD ODasfa/Datenblatt/Pneumatic actuator (BOMAFA).doc Page 1 / 1Data Sheet ActuationSpecificationCom No.:27x0201,27x0202Type of Actuator: Pneumatic Item: 0101 Manufacturer: asfa Supplier: BOMAFA02 Type of Actuator: PZ16C-500/56 x 85 D Opening Power: 81000 N Closing Power: 81000 N Stroke: 85 mm03 Operating Characteristics Air Opens X Spring Closes Air closes X Spring Opens04 General Data Diaphragm Piston X Single-Acting Double-Acting X05 Eff. Area: 1963.50 cm²Spring Range: - bar Air Supply Pressure: 5 to 7 bar(g)06 Hand pump Top Side Without X07 Energy Failure Act. open Closed locked X08 Stroke Time: Normal: 15 to 20 sec. Quick-Opening: 0.5 sec. Quick-Closing: sec.Proportional valve (system of protection: IP 65; explosion protection: EEx nA II T4)09 Manufacturer: Norgren Type No.: VP601010 Case material Aluminium X Stainless steel Single-Acting Double-Acting X11 Signal Transmission: 4 to 20 mA bar Open direction 4 mA Close direction 20 mA12 Electr. connection size Connector13 Mounting unit14 Construction: With Pressure Gauges Without Pressure Gauge XPosition Transmitter (ultrasonic; system of protection: IP 67; explosion protection: II 1/2 G EEx d IIB + H2 T6)15 Manufacturer: Balluff Type No.: BTL5 (2 wire type; mounted in the actuator)16 Signal Transmission 4 to 20 mA Volt Valve open 4 mA Valve Closed 20 mALimit Switch17 Manufacturer: Type No.: Quantity:18 Type Pneum. Electr.-Mech. Inductive ContactOutput Valve Open Valve Closed19 Mechanical Position Indication Mechanical Valve Lift Stop from to mm20 Pipes: Ø12x1 and Ø38x2 (stainless steel)2122 other components (mounted in a cabinet which must be installed separately beside the pneumatic actuator)23 - 1 piece air filter regulator (adjusted at 5.0 bar (g)) with gauge (type 67CFR; manufacturer: Fisher-Rosemount;24 body material: aluminium; pneum. connection size: ¼‖ NPT)25 - 1 piece non return valve26 - 2 pieces 2/2 way valve (pneumatically; for locking in case of an air failure; type 8290; manufacturer: Asco)27 - 2 pieces pressure gauge28 - 1 piece 3/2 way solenoid valve (pilot valve for quick-opening; 24 V DC; IP 66; explosion protection EEx d II C T6; type: 327;29 manufacturer: Asco; body material: stainless steel; pneum. connection size: ¼‖ NPT; electrical connection size: ½‖ NPT)30 - 2 pieces 3/2 way valve (type 58D-56-RA and 58D-86-RA; manufacturer: MAC Valves)31 - 2 pieces silencer32 - 1 piece air tank (size: 90 liters) with non return valve and safety valve (for the quick-opening of the valve)33 - 2 pressure hoses (for the connection between the actuator and the cabinet)34 The electronic control box with the controlling of the valve (Speed Controlic; with explosion protection EEx d) is in35 our scope of supply.36 to line 05: valve action with 5.0 bar(g), max. pressure: 7.0 bar(g)ProcessingName: Phone DateH. Cordruwisch 992-280Modifications: No. Line Date Name:1 34, 35 H. Cordruwisch2Bomafa Armaturen GmbH 3D-44866 Bochum Hohensteinstr. 52 4Phone: +49 2327/992-0 Fax: +49 2327/31443 527x0201,27x0202Page 1 / 3 Functional description 2010-08-05Functional description and components of the pneumatic control system (Speed Controlic) Pneumatic control system for one Reducing Valve 27x0201,27x0202 (with Speed Controlic forcontrolled quick-opening and locking function)Drawing No. 3L 11975/AThe pneumatic control system for the Reducing Valve 27x0201,27x0202 consists mainly of thefollowing subassemblies:1.) 1 piece cabinet to house the pneumatic components (the cabinet is mounted beside thepneumatic actuator on a separate rack):- 1 piece air supply station (item 10) consisting of filter, pressure reducing valve and gauge.- 1 piece non return valve (item 11).- 1 piece electro-pneumatic proportional valve (item 20) with silencer (item 22) for the purpose of the controlling of the Reducing Valve 27x0201,27x0202.- 2 pieces pneumatically operating 2/2 way valves (item 30) for the purpose of lockingof the Reducing Valve 27x0201,27x0202.- 2 pieces pressure gauges (item 40).- 1 piece electrically operating 3/2 way solenoid valve (item 60) with silencer (item 61) as pilot operation for the purpose of quick-opening of the Reducing Valve 27x0201,27x0202.- 2 pieces pneumatically operating 3/2 way valve (item 70 and item 71) with silencer (item 75) for the purpose of quick-opening of the Reducing Valve 27x0201,27x0202. 2.) 1 piece air pressure tank NG 90 ltr. (item 80) with safety valve and non return valve (item 81). The air tank is designed for one to two complete strokes of the Reducing Valve 27x0201,27x0202.3.) 1 piece double-acting pneumatic cylinder PZ16C-500/56x85 D (item 90) for the purposeof controlling and quick-opening the Reducing Valve 27x0201,27x0202.4.) 1 piece position transmitter (item 91) for the feedback signal (4 to 20 mA). The position transmitter is mounted in the pneumatic actuator (item 90).5.) 1 piece electronic control box (Speed Controlic).The electronic control box is mounted beside the cabinet on the separate rack. Functional description of the control systemThe existing pressure air is filtered in the air supply station (item 10) and the pressure is reduced to 5.0 bar (g). This filtered pressure air is distributed to the electro-pneumatic proportional valve (item 20), to the pneumatically operating 2/2 way valves (item 30), to the electrically operating 3/2 way solenoid valve (item 60; pilot valve for quick-opening) and via non return valve (item 81) to the air tank (item 80). Page 2 / 3 Functional description 2010-08-05Controlling of the Reducing Valve 27x0201,27x0202:If there is to be any adjusting operation on the Reducing Valve 27x0201,27x0202 in the openingor closing direction, a set point value for the positioning of the Reducing Valve 27x0201,27x0202is fed in as a current signal of 20 to 4 mA (corresponds 0 to 100 % stroke), coming from theDistributed Control System (DCS), to the electronic control box (Speed Controlic) on thebeside the pneumatic actuator.Also the set point value for the steam flow over the turbine as a 20 to 4 mA current signal is fedin from the DCS into the electronic control box (Speed Controlic) without having influence onthe normal controlling of the Reducing Valve.The 3/2 way solenoid valve (item 60) is simultaneously energized with a continuous voltage.Comparison of the set point value for the positioning and the actual value of the Reducing Valve 27x0201,27x0202 can produce a control deviation. In response to this deviation, a controlsignal (4 to 20 mA) is admitted by the electronic control box (Speed Controlic) to the electropneumatic proportional valve (item 20). This causes re-adjustment of the Reducing Valve 27x0201,27x0202 until the deviation becomes zero.The actual value is fed back as a current signal of 20 to 4 mA (corresponds 0 to 100 % stroke)to the electronic control box (Speed Controlic) by means of the ultrasonic position measuringsystem (item 91) integrated in the pneumatic actuator (item 90).20 mA = valve close (0%)4 mA = valve open (100%)Permanent set point/actual value comparison by way of the electronic control box (Speed Controlic) now causes the Reducing Valve to exactly stay in their predetermined position. Steam Turbine Trip (controlled quick-opening of the Reducing Valve 27x0201,27x0202): The binary signal of the turbine trip comes from the Distributed Control System (DCS) to theelectronic control box (Speed Controlic) on the rack beside the pneumatic actuator. By the program in the electronic control box (Speed Controlic) now the electrically operating 3/2 waysolenoid valve (item 60; pilot valve for quick-opening) is de-energized and air pressure is vented out from the pneumatically operating 3/2 way valves (item 70 and item 71). As a result,the pneumatically operating 3/2 way valves (item 70 and item 71) get de-energized and theReducing Valve 27x0201,27x0202 opens with the help of the pressurized air in the pressure airtank (item 80). But without the electronic control box (Speed Controlic) the Reducing Valve now would overshoot over the set point value of the steam turbine flow and opens to 100%.So, shortly before the Reducing Valve 27x0201,27x0202 reaches the set point value of thesteam turbine flow, the program in the electronic control box (Speed Controlic) - which hadbe calibrate for the first operation of the Reducing Valve - energized the 3/2 way solenoid valve(item 60) again. Therefore also the both pneumatically operating 3/2 way valves (item 70 anditem 71) are energized gain. Additional the controlling of the Reducing Valve 27x0201,27x0202is taken over again by the proportional valve (item 20) that now readjusts the rest up to the endof the set point value of the steam flow, without overshooting. The Reducing Valve 27x0201,quick-opens in case of a steam turbine trip in a time of (for example) approx. 0.5 seconds (see the diagram at the end of the description).27x0202,Page 3 / 3 Functional description 2010-08-05The Controlling can be done now by the Distributed Control System (DCS) with the help of theset point value for the steam flow over the turbine (20 to 4 mA) and the electro-pneumatic proportional valve (item 20).After the signal of the steam turbine trip from the Distributed Control System (DCS) is no longer present, the program in the electronic control box (Speed Controlic) is changed again.Now the Reducing Valve 27x0201,27x0202 can be driven, as in the beginning, with the set pointvalue for the positioning (20 to 4 mA) the Distributed Control System (DCS).Locking of the Reducing Valve 27x0201,27x0202 (air supply failure):If the air pressure in the pneumatic system falls below approx. 4 bar(g), the 2/2 way pneumatically operating valves (item 30) are no further activated. As a result the Reducing Valve 27x0201,27x0202 is blocked in his last position.General referencesThe current pressure values can be read from the pressure gauges at the filter/reducer or atthe pressure gauges (item 40).Reference regarding maintenance and commissioning is made to the attached operation &maintenance instructions.Exemplary diagram of the controlled quick-opening with the Speed Controlic204060801000 0,2 0,4 0,6 0,8 1 1,2 1,4 1,6 1,8 2Time [sec.]Stroke [%]Quick-opening set value in % Speed Controlic in %pieces 1 Tag No.: CustomerDimen- C Englisch XNo. sion M1.011.02 DN C/M1.03 PN C/M1.04 mm C1.05 C1.06 C1.07 C/M1.08 bar/°C C1.09 bar M1.101.11 °C C1.12 bar/a C/M2.012.02 C2.03 t/h C2.04 Pressure p1 bar/a C2.05 Temp. t1 °C C2.06 Speed w1 m/s C/M2.07 Outlet Pressure p2 bar/a C2.08 Temp. t2 °C C2.09 Speed w2 m/s C/M2.10 Wet steam ts °C M2.11 m³/h M2.12 C/M2.13 sec. C3.013.02 mm M3.03 M3.04 C √3.05 Mounting position C/M V3.06 A C/M3.07 C/M3.08 M3.09 C/M X3.10 Pieces. M3.11 mm M 20 20 163.12 Pieces. M3.13 M3.14 M3.15 M X3.16 M X3.17 M X3.18 M X3.19 M3.20 M X 13.21 Pieces M3.22 M3.23 M3.24 M3.25 M3.26 M3.27 M X3.28 M X X3.29 C/M 20G 20 20G3.30 C/M3.31 M X35CrMo17 X35CrMo17 X35CrMo173.32 M3.33 M Grafit Grafit Grafit3.34 M3.35 M3.36 85 dB(A) C/M3.37 M kg kg3.38 M t/h bar °C3.39 M DN PN Number3.40 Connection M3.41 Acceptance acc. to PED 97/23/EC L Category others4.014.024.034.044.054.064.07 Revision4.08 04.094.104.11 M to be filled in by BOMAFA4.12 C to be filled in by customer4.13 License of Customer Signature: DateData Sheet Valves Com. No.:29,020Type of Valves Injection Valve Item 1.2Installation Series 27X0201 Meike chemical industryCustomer order n.: EntriesValveNominal width 25 25Dimension of pipe connectionPipingDesign Data Inlet Outlet Inlet OutletNominal pressure 250 250OD x OD xSeal design for flangeWelding groove / Flange designMaterial: Welding end / PipingDesign data (assumed): Pressure / Temp. 155/173 155/173p actuator design openAs to the calculation of strength, a temperature increase of 5°C has been taken into considerationAmbience conditionTest pressure (T = RT )Water Water2 3 4WaterOperating Data Case No. 1 5closedMedium156 160Capacity 9.11586.7 4.26inlet 140 138 14250 50 50158 150 150Kvs - ValueType of characteristic line equal % √linearFluidic parameterQuick-closingKv - ValueSpecial designFloating time for full stroke Adjustment Quick-openingValve Data Control ValveNominal width of body connection Inlet OutletValve type Dim. SheetInl. horiz./above/under(h/a/u)Direction fo flowConstruction Angle design Straight-way design Z-designLeakrateSpindle vertical / horizontal (v/h)) actuator above / under (a/u))RangeabilityActuator design Body sizeBody construction Leakage vBody construction Cast steel Forged steel WeldmentWelding stud at the body Inlet Outlet Dished boiler endDesign Seat diameter Stroke Plug stem diameterDrain-/ Warm up-/ Swelling steam - stud/pip. PipingFixed point (Valve) Bracket at body Rubber-bounded BaseValve insert cramped self-sealing with swelling steam con.Seat bush removable removable/self-sealing weldedValve seat armoured nitride dynamic double seatValve plug fully relieved partly relieved with control spindleSealing of the stem relief space piston rings packing of pure graphitePlug type Flatplug Parabolic plug Perforated plugPressure relief inserts Seat bush as throttle bush Number of throttle bush Red.- steps total Silencer at valve outlet Number of orifice Number of perf. Plate Throttle labyrinthSteam filter single doubleWater injection Center nozzle Seat bu./Ann. Cap/Lance Cooler body for nozzlesSwelling steam delivery over Seat bush to cooler body to center nozzleAdditionalBellow Preheater conn. stud Cooler body/Pro.PlateBonnet / Protective grating Dome for nozzle Nominal width DomeActuatorMulti-turn actuator Flap actuator Thrust actuatorHydraulic actuator Pneumatic actuator HandwheelCool. water stud Warm up stud Draining con. StudInsert Seat bush PlugPerforated bush Orifice Plug nutPacking material for: Stem Seat bush Cover lockMaterialsInlet Body OutletCoating BOMAFA standard: Feidozink - S zink dust paint grey mattConnecting coefficient V = 1 Evaluation group (in accordance with DIN EN ISO 5817 a.2517)Noise emission (insulated) Wall thickness of the outlet piping must be total at least 15 mm weight of the Valve without Actuator with actuatorinjection water Quantity Waterpr. Watertemp.Water stud Design data: Press./Temp. bar/°CDesignModule。