Electric Wafer Centerline Npauj Npaim Valve: Qhia & Specs

1. Dab tsi yog Electric Wafer Hom Centerline Npauj Npaim Valve?

Ib qho hluav taws xob wafer-hom centerline npauj npaim valve ua ke peb yam ntxwv hauv ib yam khoom: acenterline (concentric) npauj npaim valve, nyob rau hauv uas lub disc axis thiab lub rooj zaum centreline coincide thiab lub disc seals tiv thaiv ib tug tag nrho ncig lub rooj thaum kaw; awafer- hom lub cev, uas yog sandwiched ncaj qha ntawm ob lub yeeb nkab flanges nrog ntev los ntawm -bolts - tsis muaj vuam, tsis muaj flanged sib cais; thiab ibhluav taws xob actuatormounted rau sab saum toj uas tig lub disc mus txog 90℃qhib los yog kaw txoj kev khiav, los yog muab tso rau ntawm ib tug nruab nrab lub kaum sab xis rau kev tswj. Qhov tshwm sim yog lub compact, lub teeb yuag, siab automated valve uas yog ceev rau nruab tshaj lub flanged valve thiab pheej yig dua los tswj, uas yog vim li cas nws tau dhau los ua lub neej ntawd automated shutoff thiab tswj valve nyob rau hauv lub tsev cov kev pab cuam, dej kho thiab kev lag luam dav dav - feem ntau nyob rau hauv qhov ntau thiab tsawg mus txog DN600 thiab pressures mus txog PN16 rau soft designs-

2. Cov qauv thiab kev ua haujlwm

Lub valve lub cev yog ib tug luv spool nrog nrhiav qhov rau lub flange bolts; lub voj voog rotates ntawm ib tug ncej txhawb rau saum thiab hauv qab (los yog ntawm ib tug qia). Lub nplhaib lub rooj zaum - EPDM, NBR, PTFE los yog lub nplhaib hlau - yog clamped ntawm lub cev halves los yog khaws cia rau hauv ib tug zawj, thiab muab lub sealing nto uas lub disc ntug presses tiv thaiv thaum kaw. Lub tshuab hluav taws xob hluav taws xob muaj lub cev muaj zog, txo qis gearbox, stroke / txwv- hloov module thiab lub teeb liab module. Thaum cov lus txib tuaj txog (kev sib cuag qhuav, 4-20 mA analogue teeb liab, los yog RS485 / Modbus), lub cev muaj zog khiav, lub gearbox multiplies torque thiab txo qhov ceev, thiab lub disc tig mus rau txoj hauj lwm txib; cov kev txwv hloov chaw nres lub tsav ntawm qhov qhib thiab kaw txoj haujlwm, tiv thaiv dhau - mus txawv tebchaws, thiab cov lus tawm tswv yim qhia txog qhov xwm txheej ntawm lub valve mus rau qhov kev tswj hwm. Rau kev tswj lub luag haujlwm, tus positioner nyob rau hauv lub actuator piv 4-20 mA setpoint nrog rau qhov tseeb disc txoj hauj lwm thiab tsav lub cev muaj zog kom txog rau thaum lawv phim. Vim hais tias lub disc yog symmetrical, lub centreline valve ntsaws ruaj ruaj nyob rau hauv ob qho tib si khiav cov lus qhia - ib tug tswv yim kom zoo dua nyob rau hauv complex piping layouts uas ntws kev taw qhia yuav thim rov qab thaum lub sij hawm hloov twj tso kua mis.

3. Sealing Options: Rooj zaum mos vs. Rooj zaum tawv

Two rules of thumb: (1) a soft seat is specified when tight shutoff matters more than temperature - the elastomer conforms to the disc edge and achieves bubble-tight closure; (2) lub rooj zaum tawv tau teev tseg thaum qhov nruab nrab siab tshaj qhov ntsuas kub ntawm elastomer los yog tawm tsam nws - tab sis tom qab ntawd txhais cov chav kawm xau (xws li ISO 5208 tus nqi lossis API 598 txais) hauv koj qhov kev nug, vim tias "hlau lub rooj" yog kev tsim kho, tsis yog qhov nruj nruj.

4. Cov Txheej Txheem Xaiv Qhov Tseem Ceeb

Loj (DN):ntau yam DN50-DN600 rau wafer centerline tsim; Qhov loj dua lossis siab dua txav mus rau ob npaug / triple-eccentric designs.

Siab (PN):soft- rooj zaum centerline li qub feem ntau PN10–PN16 (1.0–1.6 MPa); txheeb xyuas qhov tseeb qhov ntsuas siab thiab lub plhaub- ntsuas qhov siab ntawm daim ntawv teev cov ntaub ntawv - tsis txhob nthuav tawm ntawm lub cev- tsuas yog kev ntsuas.

Kub:phim cov khoom siv lub rooj zaum rau qhov kev pabcuam kub nrog cov npoo (EPDM ≈ −40/120 degree, NBR ≈ −30/120 degree, PTFE ≈ −60/180–200℃nruam; hlau rooj dav dua).

Media:corrosive media → stainless hlau (304/316) los yog PTFE-lined lub cev; particulate media → qhia meej hnav- resistant trim thiab zam lub rooj zaum hauv cov slurry abrasive.

Actuator interface:Paub meej tias ISO 5211 mounting flange thiab tsav loj, thiab hais tias tus actuator torque tshaj lub valve lub torque tawg nrog ib tug npoo ntawm yam tsawg kawg nkaus 1.3-1.5 ×.

Tswj hom:on/off (nrog txwv switches) los yog modulating (4-20 mA positioner); hais txog qhov yuav tsum tau ua ua tsis tiav (ua tsis tiav- qhib / tsis ua haujlwm- kaw / kaw-hauv- qhov chaw) kom nyab xeeb.

Enclosure thiab kev nyab xeeb:kev pabcuam sab nraum zoov xav tau IP65 lossis siab dua (plua plav- thiab tsis muaj dej); flammable atmospheres xav tau kev tawg- pov thawj actuator (xws li, Ex d IIC T4) nrog rau daim ntawv pov thawj; rau cov khoom noj/pharma qhia txog kev huv huv-qib trim (piv txwv li, 316L).

5. Daim ntawv thov thiab kev daws teeb meem

Lub luag haujlwm tseem ceeb: kev kho dej (kev tswj hwm qib tank, lub twj tso kua mis pib / nres, ntsuas qhov ntsuas siab); HVAC chilled thiab dej kub systems (cheeb tsam tswj, sib txawv ntws); tshuaj nroj tsuag (corrosive kua nrog lined los yog stainless lub cev); khoom noj khoom haus thiab dej haus (kev huv 316L trim); kev tiv thaiv hluav taws (hluav taws- tso tawm tso tawm nrog cov chaw taws teeb txuas); thiab cov dej hauv nroog hauv nroog (kev tswj xyuas qhov siab thiab ntws). Cov teeb meem feem ntau hauv teb thiab lawv cov kev kho mob: (1)leakage ntawm kaw- hnav lossis puas lub rooj zaum (hloov lub nplhaib lub rooj zaum, uas yog ib qho khoom siv tau), cov khoom txawv teb chaws ntawm lub ntsej muag sealing (huv cov kab), lossis actuator hauv qab - torque ; (2)actuator tsis teb- poob ntawm lub hwj chim lossis teeb liab teeb liab teeb meem txhaum cai (xyuas cov khoom siv thiab teeb liab txuas ntxiv), lub cev muaj zog lossis lub capacitor tsis ua haujlwm (hloov), lossis jammed gearbox; (3)qeeb los yog nplaum ua haujlwm- khib nyiab hauv lub cev, lubrication tsis txaus ntawm qia bearings, los yog ib tug distorted disc (huv, re- roj, los yog hloov lub disc); thiab (4)rov ua dua -kev ua yuam kev- txwv-hloov kev hloov kho tsis raug lossis tsis raug mob stroke (re-commission per the actuator manual).

6. Kev xav tsis zoo

Ua ntej, "lub nruab nrab npauj npaim valve tuaj yeem tswj tau zoo li lub ntiaj teb valve" - qhov nruab nrab ntawm lub valve throttle qhov tsim nyog ntawm li 30-70℃qhib, tab sis ntawm qhov qhib me me lub disc tsim siab tshaj tawm uas ua rau lub rooj zaum ntug; rau nruam throttling qhia qhov tseeb qhov loj me thiab Cv xam. Thib ob, "lub rooj muag muag=tsis zoo" - hauv dej thiab HVAC kev pabcuam lub rooj zaum mos yog cov lus teb engineering, xa cov npuas- nruj kaw uas lub rooj tawv tawv tsis tuaj yeem sib tw ntawm qhov tsis tshua muaj siab. Thib peb, "loj actuator=nyab xeeb" - oversizing ua rau hammering ntawm qhov chaw nres tsheb thiab tuaj yeem cuam tshuam lub disc ncej; loj torque nrog margin tab sis tsis dhau. Plaub, "wafer li qub xav tau kev txhawb nqa tshwj xeeb" - lub valve tau txais kev txhawb nqa los ntawm flange bolting nws tus kheej; cia li nruab nrab ntawm lub valve ntawm flanges ua ntej zawm thiab tsis txhob siv lub actuator ua lub lifting point.

7. FAQ

Dab tsi yog qhov txawv ntawm wafer-hom thiab lug- hom npauj npaim li qub?wafer valve yog sandwiched ntawm flanges nrog los ntawm -bolts thiab tsis tuaj yeem cais ib sab rau kev saib xyuas; lub lug valve muaj threaded lugs thiab tuaj yeem bolted rau ib flange kom cais cov kab hauv qab. Xaiv hom lug qhov twg ib leeg -sab cais yuav tsum tau.

Puas tuaj yeem siv lub nruab nrab npauj npaim valve siv rau kev pabcuam rau / tawm ntawm lub twj tua hluav taws?Yog - nws yog ib qho kev xaiv rau hluav taws kub- tso pa tawm nrog cov chaw taws teeb txuas; qhia kom meej tus actuator qhov ua tsis tiav, qhov ntsuas IP, thiab cov cai siv hluav taws xob tiv thaiv hluav taws xob rau hom valve.

Cov teeb liab dab tsi tuaj yeem txais hluav taws xob actuator?Feem ntau qhuav-hu rau cov lus txib hloov pauv (on/off), 4–20 mA analogue setpoint (modulating nrog positioner), thiab RS485/Modbus los yog lwm yam fieldbus raws tu qauv rau kev koom ua ke nrog PLC/DCS systems.

Lub siab npaum li cas tuaj yeem ua tau ib qho mos- zaum wafer npauj npaim valve tuav?Cov kev ntsuas zoo yog PN10–PN16 (1.0–1.6 MPa); ib txwm paub meej tias qhov ntsuas kev ua haujlwm siab thiab lub plhaub kuaj ntawm cov ntaub ntawv. Rau siab dua, siv zog - zaum eccentric designs.

Cov qauv twg siv?ISO 5211 (actuator mounting), ISO 5752 / EN 558 (lub ntsej muag- rau- ntsej muag), API 609 (npauj npaim li qub), ISO 5208 (kev ntsuas kev sib khi); actuators ua raws li IEC / EN cov qauv rau cov motors thiab enclosures (IP, Ex).

Lub rooj zaum tuaj yeem hloov tsis tau tshem lub valve ntawm kab?Hauv ntau lub wafer tsim lub nplhaib lub rooj zaum yog hloov tau tom qab tshem lub valve ntawm nruab nrab ntawm flanges (tsis tag "hauv- kab"); qee qhov qauv tsim tso cai rau lub rooj nkag los ntawm lub ntsej muag. Paub meej txog qhov kev xaiv kev pabcuam nrog tus neeg muag khoom ua ntej xaj yog tias kev saib xyuas tsuas yog txwv.

Qhia rau peb DN, PN, tswj lub teeb liab thiab ib puag ncig - peb yuav hais cov pob hluav taws xob ua kom tiav npauj npaim valve pob.

Cov lus nug nquag

Vim li cas lub centerline npauj npaim valve foob nyob rau hauv ob qho tib si ntws cov lus qhia?Vim hais tias lub disc yog symmetrical thiab ntsaws ruaj ruaj rau ib tug tag nrho ncig lub rooj, lub centerline tsim tuav nruj kaw nrog ntws nyob rau hauv ob qho tib si kev taw qhia. Qhov no yog qhov ua tau zoo hauv cov kav dej sib txuas uas cov kev taw qhia ntws tuaj yeem thim rov qab thaum lub twj tso kua mis hloov, txij li tsis muaj kev taw qhia tshwj xeeb yuav tsum raug hwm.

Lub tshuab hluav taws xob ua haujlwm li cas rau lub disc rau kev tswj hwm?Lub actuator sib txuas lub cev muaj zog, txo qis gearbox, stroke thiab txwv -hloov module, thiab lub teeb liab module. Rau kev hloov pauv lub luag haujlwm ib tus positioner nyob rau hauv lub actuator piv 4-20 mA setpoint nrog rau qhov tseeb disc txoj hauj lwm thiab tsav lub cev muaj zog mus txog rau thaum ob qho tib si match, thaum txwv switches nres lub tsav ntawm lub qhib thiab kaw txoj hauj lwm los mus tiv thaiv tshaj - mus txawv tebchaws.

Dab tsi yog qhov tshwm sim ntawm kev xau thaum kaw ntawm lub tshuab hluav taws xob npauj npaim valve?Qhov ua rau ib txwm muaj yog lub nplhaib lub rooj hnav lossis puas tsuaj (hloov nws - lub rooj zaum yog qhov khoom siv tau), cov khoom txawv teb chaws lodged ntawm lub ntsej muag sealing (huv cov kab), los yog actuator nyob rau hauv - torque . Hais txog qhov ua rau tsis yog tsuas yog nce tus actuator loj.

Yog vim li cas ib tug oversized hluav taws xob actuator puas lub valve?Ntau tus actuator torque hammers lub disc rau hauv qhov chaw nres tsheb thiab tuaj yeem cuam tshuam lub disc ncej dhau sijhawm. Qhov loj ntawm tus actuator yog li nws cov zis tawm torque tshaj li lub valve tawg torque nrog cov npoo ntawm li 1.3-1.5 npaug ntawm - npoo, tsis tshaj - thiab tsis txhob siv lub actuator ua lub lifting point thaum lub sij hawm installation.

Vim li cas lub rooj zaum mos yog cov lus teb zoo hauv engineering hauv dej thiab HVAC kev pabcuam?Hauv dej huv thiab HVAC lub luag haujlwm lub rooj zaum elastomer ua raws li cov ntug disc thiab xa cov npuas- nruj kaw uas lub rooj zaum tawv tsis tuaj yeem sib xws ntawm qhov siab qis. Cov rooj zaum mos tsis yog lub cim ntawm qhov tsis zoo; lawv tau teev nyob qhov twg qhov kev kaw kaw nruj dua li qhov kub thiab txias.

Lub cev thiab cov khoom siv twg yuav tsum tau xaiv rau cov xov xwm corrosive?Rau cov kua dej corrosive qhia lub cev stainless hlau (304 lossis 316) lossis PTFE-cov qauv tsim, thiab rau cov khoom noj lossis tshuaj siv tshuaj huv huv- qib trim xws li 316L. Rau cov xov xwm me me, qhia qhov hnav- tiv taus luas thiab zam lub rooj muag muag hauv cov slurry abrasive, qhov twg cov ntug disc yuav erode lub elastomer.