01.16.GB. Control valves and steam-conditioning. 900 line -1-

Transcription

1 GB Cntrl valves and steam-cnditining statin in angle way executin 900 line --

2 Kv cefficient calculatin Calculatin itself is carried ut with respect t cnditins f regulating circuit and perating medium accrding t equatins mentined belw. Cntrl valve must be designed t be able t regulate maximal flw quantity at given perating cnditins. At the same time it is necessary t check whether minimal flw quantity can be even regulated r nt. Because f eventual minus tlerance 0% f Kv00against Kvs and requirement fr pssible regulatin within range f maximal flw (decrement and increase f flw), prducer recmmends t select Kvs value higher than maximal perating Kv value: Kvs =.. Kv It is necessary t take int accunt t which extent Q max invlve "precautinary additins" that culd result in valve versizing. Relatins f Kv calculatin Liquid Gas Kv = Superh. steam Sat. steam Pressure drp p > p / p < p / Q 00 Q.T 54 n n p.p Q v 00 m p Qm v.x 00 p Pressure drp p > = p / p = < p / p.qn.t 54.p n Q v 00 m p Qm v.x 00 p Abve critical flw f vapurs and gases When pressure rati is abve critical (p /p < 0.54), speed f flw reaches acustic velcity at the narrwest sectin. This event can cause higher level f nisiness and then it is cnvenient t use a thrttling system ensuring lw nisiness (multi-step pressure reductin, damping rifice plate at utlet). Cavitatin Cavitatin is a phenmenn when there are steam bubbles creating and vanishing in shcks - generally at the narrwest sectin f flwing due t lcal pressure drp. This event expressively cuts dwn service life f inner parts and can result in creatin f unpleasant vibratins and nisiness. In cntrl valves it can happen n cnditin that (p - p ) > = 0.6 (p - p S) Valve differential pressure shuld be set the way s that neither any undesired pressure drp causing cavitatin can ccur, nr liquid-steam(wet steam) mixture can create. Otherwise it must be taken int accunt when calculating Kv value. If the creatin f cavitatin still threatens, it is necessary t use a multi-step pressure reductin. Valve flw characteristics L R Kv/Kv 00 - linear characteristic Kv/Kv 00 = (H/H 00) - equal-percentage characteristic (4-percentage) (4. H/H Kv/Kv = E 00 ) 00 Rangeability L H/H 00 Rangeability is the rati f the biggest value f flw cefficient t the smallest value. In fact it is the rati (under the same cnditins) f highest regulated flw rate value t its lwest value. The lwest r minimal regulated flw rate is always higher than 0. R Dimensins and units Marking Unit Name f dimensin Kv m /hur Flw cefficient under cnditins f units f flw Kv00 m /hur Flw cefficient at nminal strke Kvs m /hur Valve nminal flw cefficient Q m /hur Flw rate in perating cnditins (T, p ) Qn Nm /hur Flw rate in nrmal cnditins (0 C, 0.0 MPa) Qm kg/hur Flw rate in perating cnditins (T, p ) p MPa Upstream abslute pressure p MPa Dwnstream abslute pressure ps MPa Abslute pressure f saturated steam at given temperature (T ) p MPa Valve differential pressure ( p = p - p ) kg/m Prcess medium density in perating cnditins (T, p ) n kg/nm Gas density in nrmal cnditins (0 C, 0.0 MPa) v m /kg Specific vlume f steam when temperature T and pressure p v m /kg Specific vlume f steam when temperature T and pressure p / T K Abslute temperature at valve inlet (T = 7 + t ) x Prprtinate weight vlume f saturated steam in wet steam --

3 Applicatin f multi-step pressure reductin When the valves are designed fr peratin in abve-critical differential pressure (p /p <0,54 when thrttling steam and gases), r when diff. pressure value is higher than the recmmended service diff. pressure, it is effectual t use a thrttling system in tw r three steps t prevent the cavitatin frm creating and t ensure bth a lng service life f the valve inner parts and lw nisiness when perating. Jednstupňvá redukce tlaku Dvustupňvá redukce tlaku --

4 RV 90 Cntrl valves Inlet DN 50 t 50 Outlet DN 80 t 700 PN 6 t 60 Descriptin The valves with extended utlet f series RV90 are single seated cntrl valves f a unit cnstructin designed t fit in all demands f an appliance the valve is designed fr. The pressure-balanced, multi-step thrttling system is always designed t eliminate the valve s high differential pressures with a high resistance t wearing caused by flw and effects f expanding steam. It als ensures a lw nisiness level. The valve is equipped with packing type Live Lading. The valves are supplied in angle executin with weld ends cnnectin and are actuated with bth electric and pneumatic actuatrs. The cnnectin is designed fr using actuatrs f the fllwing prducers: ZPA Pečky, Regada Prešv, Auma, Schiebel and Flwserve. It is als pssible t use fast acting electrhydraulic actuatrs fr quick clsing r pening. Prcess media The valves are especially designed fr the flw and pressure cntrl f the prcess medium withut impurities, hwever they can be used fr gases and vapurs when inlet and utlet flw velcities are kept within the permissible range. The cmmn prcess media are fr example water, steam and ther media with n special demands n the used type f material f the valve. The prducer recmmends t pipe a strainer int pipeline in frnt f the valve when impurities are present. Impurities can affect the quality and reliability f regulatin and can cause a reductin f the valve service life. The valve applicatin fr any ther media shuld be cnsulted with the prducer because f the type f material that is in cntact with the prcess medium. Applicatin The valves f series RV90 are especially designed fr industry applicatins such as heating plants, pwer plants r regulatin f technlgical prcesses. The max. permissible perating pressure values crrespnd t EN 56- see page f this catalgue. Installatin 6 The valves must be piped the way s that the prcess medium flw will cincide with the arrws indicated n the valve bdy. They can be installed in hrizntal, vertical r inclined pipeline in any psitin except the psitin when the actuatr is under the valve bdy. Recmmended differential pressures 6 n regard t the pressure balancing f the plug and t linear frces f usable actuatrs, the valves applicatin in high differential pressures is nt limited by the frces caused by prcess medium pressure but by the type f used thrttling system. A recmmended max. differential pressure fr ne step f a multi-step pressure reductin is 5.0 MPa. It is recmmended t cnsult the prducer and discuss the cncrete cases with regard t pressure rati and service parametres f ther equipment. Technical data Series Type f valve Nminal size range Nminal pressure Bdy material (including weld ends) Seat material Plug material Weld ends Trim Flw characteristic Leakage rate Packing RV 90 Cntrl valve, single-seated, angle, with weld ends, with pressure-balanced plug, with extended utlet and rifice plate in extended utlet bdy: DN80, 50, 50; inlet: DN 50 t 50; utlet: DN 80 t 700 inlet PN 00 t 60 ; utlet PN 6 t (P 80 GH)... 0 t 500 C.75 (CrM4-5)... 0 t 550 C.78 (CrM9-0)... 0 t 600 C.490 (P9, X0CrMVNb 9-)... 0 t 600 C.49 + hard metal verlay.49 + hard metaly verlay Dle EN 67 (8/000) One r tw step pressure reductin, ptinaly with rifice plates in utlet Linear, equal-percentage Acc. t EN 49 (5/00) Class III, IV, executin with higher tightness - Class V Grafit - Live Lading -4-

5 Range f Kvs values Dimensins f weld ends DN Multi-step press. reductin Multi-step press. reductin Kvs values [m /hd] - linear flw characteristic Kvs values [m /hd] - equal-percentage flw characteristic Nminal values f Kvs are understd as multiples f 0 f the prgressin f selected numbers R0 (.0;.5;.6;.0;.5;.; 4.0; 5.0; 6.; 8.0; 0.0). They are specified individually fr every valve acc. t the custmer s requirements and value within the apprpriate range shwen in the table abve D Cnnectin acc. t EN Cnnecting dimensins f weld ends can be mdified n request by the custmer. Other shapes f weld ends after agreement with prducer -5-

6 Cntrl valve RV 90 Dimensins and weights f RV 90 with weld ends DN V V V V H d m Bdy Inlet Outlet [kg] M0x, M0x M4x 700 Missing data n request Nte:. The values f weight are apprximate (depends n diameter f weld ends). -6-

7 The valve cmplete specificatin N. fr rdering RV 90. Type f valve. Series Cntrl valve Cntrl valve, angle,extended utlet XX RV 90 X XX XX / - x x / X. Type f actuating ) Applicatin nly fr DN80 bdy 4. Cnnectin 5. Bdy material (perating temp. ranges are specified in parentheses) 6. Packing 7. Multi-step pressure red. 8. Flw characteristic 9. N. f rifice plates 0. Nminal pressure. Operating temperature C. Nminal size. Accessries Electric actuatr E Pneumatic actuatr P ) Electric actuatr Mdact MTR EPD ) Electric actuatr Mdact MTN Cntrl EYA ) El. actuatr Mdact MTP Cntrl EYA ) ) El. actuatr Mdact MTNED,MTPED EYA ) ) El. actuatr Mdact MTN, MTP EYB ) ) El. actuatr Regada STR, STR PA EPM Electric actuatr Auma SAR 7.6 ) EAG Electric actuatr Auma SAR Ex 7.6 ) EAH Electric actuatr Auma SAR 0. EAJ Electric actuatr Auma SAR Ex 0. EAK Electric actuatr Auma SAR 4. EAM Electric actuatr SAR Ex 4. EAM Electric actuatr SAR 4.6 EAO Electric actuatr Auma SAR Ex 4.6 EAP Electric actuatr Schiebel rab5 EZG Electric actuatr Schiebel exrab5 EZH Electric actuatr Schiebel rab8 EZK Electric actuatr Schiebel exrab8 EZL Pneumatic actuatr Flwserve PO 50 ) PFD Weld ends 4 Cast steel.046 (0 t 500 C) Stainless stel.490 (0 t 600 C) 5 Ally steel.78 (0 t 600 C) 6 Ally steel.75 (0 t 550 C) 7 Other material acc. t request 9 Grafit - Live Lading 5 One-step pressure reductin Tw-step pressure reductin Linear - Leakage rate class III. L Linear - Leakage rate class IV. N Linear - Leakage rate class V. D Equal-percentage - Leakage rate class III. R Equal-percentage - Leakage rate class IV. E Equal-percentage - Leakage rate class V. Q Max. X PN inlet utlet PN6 0 PN5 PN40 PN6 PN00 4 PN60 5 PN50 6 PN0 7 PN400 8 PN60 9 Acc. t prcess medium DN Inlet Bdy Outlet Bdy warming-thrugh cnnectin Bdy drainage Order example: Tw-way, cntrl valve DN 80/50, bdy: DN80, PN 60/00, with electric actuatr Mdact MTN Cntrl, bdy material: cast steel, weld ends, packing Graphite, tw-step pressure reductin, linear flw characteristic is specified as fllws: RV90 EYA 45 L 54/ x080x50 Nte: PN and DN f utlet, multi-step pressure reductin N. f rifice plate pssibly different type f actuating is pssible after the agreement with the prducer. XX H D -7-

8 RS 90 Steam cnditining statin Inlet DN 50 t 50 Outlet DN 50 t 700 PN 6 t 60 Descriptin Steam cnditining statins f series RS90 are single-seated cntrl valves f a unit cnstructin designed fr water injectin int the extended utlet. The pressure-balanced, multi-step thrttling trim is designed t eliminate high differential pressures within the valve and ensure the lw nisiness. It ensure a high resistance t wearing caused by medium flw and t effects f the expanding steam. A lw nisiness level can be als eliminated with rifice plates in extended utlet. Cling water is injected int the extended utlet behind the thrtling trim thrugh a specially designed nzzle (VH, VHP r CHR) with changeable flw. The valve is equipped with packing f type "LiveLading". The valves are supplied in angle executin with weld ends cnnectin. The valves are actuated with bth electric and pneumatic actuatrs. The cnnectin is designed fr using actuatrs f the fllwing prducers: ZPA Pečky, Regada Prešv, Auma, Schiebel and Flwserve. It is als pssible t use fast acting electrhydraulic actuatrs fr quick clsing r pening. Prcess media The valves are especially designed fr the flw and pressure cntrl f the prcess medium withut impurities, hwever they can be used fr gases and vapurs when inlet and utlet flw velcities are kept within the permissible range. The cmmn prcess media are fr example water, steam and ther media with n special demands n the used type f material f the valve. The prducer recmmends t pipe a strainer int pipeline in frnt f the valve when impurities are present. Impurities can affect the quality and reliability f regulatin and can cause a reductin f the valve service life.the valve applicatin fr any ther media shuld be cnsulted with the prducer because f the type f material that is in cntact with the prcess medium. Applicatin The valves f series RS90 are designed fr simultaneus pressure and temperature reductin f steam. They are especially designed fr industrial applicatins such as lwpressure steam prductin in heating, steam circuit in pwer plants, by-pass statins r technlgical prcesses. The max. permissible perating pressure values crrespnd t EN 56- see page f this catalgue. Installatin The valves must be piped the way s that the prcess medium flw will cincide with the arrws indicated n the valve bdy. They can be installed in hrizntal, vertical r inclined pipeline in any psitin except the psitin when the actuatr is under the valve bdy. Recmmended differential pressures In regard t the pressure balancing f the plug and t linear frces f usable actuatrs, the valves applicatin in high differential pressures is nt limited by the frces caused by prcess medium pressure but by the type f used thrttling system. A recmmended max. differential pressure fr ne step f a multi-step pressure reductin is 5.0 MPa. It is recmmended t cnsult the prducer and discuss the cncrete cases with regard t pressure rati and service parametres f ther equipment. Technical data Series Type f valve Nminal size range Nminal pressure Bdy material (including weld ends) Seat material Plug material Weld ends Trim Flw characteristic Leakage rate Packing RS 90 Cntrl valve, single-seated, angle, with weld ends, with pressure-balanced plug, with extended utlet, rifice plate, cnnectin t injectin head (VH, VHP r CHR) bdy: DN80, 50, 50; inlet: DN 50 t 50 ; utlet: DN 80 t 700 inlet PN 00 t 60 ; utlet PN 6 t (P 80 GH)... 0 t 500 C.75 (CrM4-5)... 0 t 550 C.78 (CrM9-0)... 0 t 600 C.490 (P9, X0CrMVNb 9-)... 0 t 600 C.49 + hard metal verlay.49 + hard metal verlay Dle ČSN EN 67 (8/000) One r tw step pressure reductin, ptinaly with rifice plates in utlet Lineární, rvnprcentní Acc. t ČSN EN 49 (5/00) Class III, IV, executin with higher tightness - Class V Grafit - Live Lading -8-

9 Range f Kvs values Dimensins f weld ends DN tělesa Multi-step press. reductin Multi-step press. reductin Kvs values [m /hd] - linear flw characteristic Kvs values [m /hd] - equal-percentage flw characteristic Nminal values f Kvs are understd as multiples f 0 f the prgressin f selected numbers R0 (.0;.5;.6;.0;.5;.; 4.0; 5.0; 6.; 8.0; 0.0). They are specified individually fr every valve acc. t the custmer s requirements and value within the apprpriate range shwen in the table abve D Cnnectin acc. t ČSN EN Cnnecting dimensins f weld ends can be mdified n request by the custmer. Other shapes f weld ends after agreement with prducer -9-

10 Steam cnditining statin RS90 /Ax - cnnectin t VH r VHP (injectin at the axis f utlet) Steam cnditining statin RS90 /Rx - cnnectin t CHR (injectin perpendicular t the axis f utlet) Dimensins and weights f RS 90 with weld ends DN V V V V V 4 H d m Těles Vstup Výstup [kg] M0x, M0x M4x 700 Nte: Missing data n request. The values f weight are apprximate (depends n diameter f weld ends). -0-

11 The valve cmplete specificatin N. fr rdering RS 90. Type f valve. Series. Type f actuating ) Applicatin nly fr DN80 bdy 4. Cnnectin 5. Bdy material (perating temp. ranges are specified in parentheses) 6. Packing 7. Multi-step pressure red. 8. Flw characteristic 9. N. f rifice plates 0. Nminal pressure Steam cnditining statin Cntrl valve, angle, extended utlet with cling water cnnectin XX RS X XX 90 Electric actuatr E Pneumatic actuatr P ) Electric actuatr Mdact MTR EPD ) Electric actuatr Mdact MTN Cntrl EYA ) El. actuatr Mdact MTP Cntrl EYA ) ) El. actuatr Mdact MTNED,MTPED EYA ) ) El. actuatr Mdact MTN, MTP EYB ) ) El. actuatr Regada STR, STR PA EPM Electric actuatr Auma SAR 7.6 ) EAG Electric actuatr Auma SAR Ex 7.6 ) EAH Electric actuatr Auma SAR 0. EAJ Electric actuatr Auma SAR Ex 0. EAK Electric actuatr Auma SAR 4. EAM Electric actuatr SAR Ex 4. EAM Electric actuatr SAR 4.6 EAO Electric actuatr Auma SAR Ex 4.6 EAP Electric actuatr Schiebel rab5 EZG Electric actuatr Schiebel exrab5 EZH Electric actuatr Schiebel rab8 EZK Electric actuatr Schiebel exrab8 EZL Pneumatic actuatr Flwserve PO 50 ) PFD Weld ends 4 Cast steel.046 (0 t 500 C) Stainless stel.490 (0 t 600 C) 5 Ally steel.78 (0 t 600 C) 6 Ally steel.75 (0 t 550 C) 7 Other material acc. t request 9 Grafit - Live Lading One-step pressure reductin Tw-step pressure reductin Linear - Leakage rate class III. Linear - Leakage rate class IV. Linear - Leakage rate class V. Equal-percentage - Leakage rate class III. Equal-percentage - Leakage rate class IV. Equal-percentage - Leakage rate class V. Max. PN inlet utlet PN6 0 5 L N D R E Q X XX / - XX x x / PN40 PN6 PN00 4 PN60 5 PN50 6 PN0 7 PN400 8 PN60 9. Operating temperature C Acc. t prcess medium. Nminal size DN Inlet Bdy Outlet. Accessries Cnnectin t VH/VHP Cnnectin t CHR Number f cling inputs Bdy warming-thrugh cnnectin A R X H Bdy drainage D Ordering example: Steam cnditining statin DN 80/50, bdy DN80, PN 60/00, with electric actuatr Mdact MTN Cntrl, bdy material: cast steel, weld ends, packing : Graphite - Live Lading, tw-step pressure reductin, ne rifice plate at utlet, linear characteristic, adapted t cnnectin n ne VH and with bdy warming is specified as fllws: RS90 EYA45 L 54/ x080x50/AH Nte: PN and DN f utlet, multi-step pressure reductin N. f rifice plate pssibly different type f actuating is pssible after the agreement with the prducer. Type f mechanical injectin head (VH) acc. t calatlgue sheet 0-0. r drive-steam injectin head (VHP) acc. t catalgu sheet

12 Data fr an actuatr specificatin The valves are designed t be actuated with linear r multiturn electric actuatrs f the fllwing prducers as Auma, Schiebel, ZPA Pečky, Regada Prešv r pneumatic actuatrs Flwserve. In case f request fr quick running they culd be als equipped with fast acting electrhydraulic actuatrs. Valves are adjusted with actuatrs s that in the clsed psitin, i.e. when clsing t the seat, the trque switch turns ff. In the pen psitin they are adjusted s that the psitin switch turns ff (the trque switch fr pen psitin is adjusted as a safety switch t prtect the valve against its damage nly). Cnnecting flange f an actuatr is designed t allw rtatin f the drive f 45. Assigning f multi-turn actuatrs t a valve DN Strke rpm / strke 0 0,5 4, Min. mdulating trque Max. tripping trque [mm] [n] [Nm] [Nm] Trapezidal thread 0 60 Tr 0x4 LH Tr 6x6 LH Tr 40x7 LH Valve attachment EN ISO 50 F0 / typ A F 4 / typ A F 4 / typ A Assigning f linear actuatrs t a valve Min. nminal Max. tripping Strke DN thrust thrust Thread f stem [mm] [ kn ] [ kn] M0x,5 Maximal permissible verpressures [Mpa] Material Cast steel.046 Ally steel.75 Ally steel.78 Steinless steel.490 PN Temperature [ C ] ,70 8,88 8,6 7,44 4,5,9 5,5 4,,0,9 7,6,50 4,, 0,4 8,6, 5,47,0 8,8 6, 8,4 5,5 55,9 6,,6 5,4 9, 4,9, 9,8 7, 58,7 9,8 5,0,4 0,0 7,5 59, 9,8 5,0,4 0,0 7,5 59,,8 9,7 46,9 8,5 4,5 8, 8,6 7,89 7,0 8,75,8 6,4,6,6 9,99, 9,7 5,6 7, 5, 9,9 4,,5 4,9 5,8 49,7 9, 8,5 7,89 6,58,6,6 0,5, 7, 9, 7 5, 6,4,0 4,,5 6, 5,8 49,7 4,5 8,5 7,89 6,58,6,6 0,5, 9,7 6,4 7, 5,,0 4,,5 6, 5,8 49,7 4,5,9 4,70 7,4 9,9,7 8,5,5 5,6 8,80, 4,0, 5,8 9, 4,5 8,6, 6,7 600,49,9,7 4,78 5,98 9,40 5,0 8,0,5 0,0,5 --

13 LDM, spl. s r.. Litmyšlská Česká Třebvá Czech Republic tel.: fax: sale@ldm.cz LDM, spl. s r.. Office in Prague Pdlská Praha 4 tel.: fax: tmas.suchanek@ldm.cz LDM, spl. s r.. Office in Ústí nad Labem Ladva 548/8 400 Ústí nad Labem - Severní Terasa tel.: tmas.kriz@ldm.cz LDM servis, spl. s r.. Litmyšlská Česká Třebvá Czech Republic tel.: fax: servis@ldm.cz LDM, Plska Sp. z.. ul. Bednrza Katwice Pland tel.: fax: mbile: ldmplska@ldm.cz LDM Bratislava s.r.. Miervá Bratislava Slvakia tel.: fax: ldm@ldm.sk http: // LDM - Bulgaria - OOD z. k. Mladst bl. 4, flr, app Sfia Bulgaria OOO "LDM Prmarmatura" Jubilejniy prspekt, dm.6a, f Khimki Mscw Regin Russian Federatin tel.: tel.: fax: fax: mbile: mbile : ldm.bg@ldmvalves.cm infrus@ ldmvalves.cm TOO LDM Lbdy 46/ Office N Karaganda Kazakhstan tel.: fax: mbile: sale@ldm.kz http: // LDM Armaturen GmbH Wupperweg D-5789 Lindlar Germany tel.: fax: mbile: ldmarmaturen@ldmvalves.cm Váš partner LDM, spl. s r.. si vyhrazuje práv změnit své výrbky a specifikace bez předchzíh upzrnění. --