Tswj valve
Txheej txheem cej luam
Throttle alve, tseem hu ua tswj valve, yog ib qho cuab yeej siv lub zog ua haujlwm los hloov cov dej ntws hauv cov txheej txheem txheej txheem. Vim tias International Electrotechnical Commission (IEC) txhais lub throttle valve (hu ua Control Valve txawv teb chaws) raws li: "Lub davhlau ya nyob twg tsim los ntawm cov cuab yeej siv hluav taws xob hauv cov txheej txheem txheej txheem, uas suav nrog ib feem, thiab muaj cov txheej txheem hloov hauv. Lub cev ib feem ntawm cov kua dej ntws yog txuas nrog ib lossis ntau tus actuators, tus actuator yog siv los teb cov teeb liab xa los ntawm cov khoom tswj, lub regulator yog tsim los ntawm ob qhov chaw: lub actuator thiab lub valve. Kev tsav tsheb ntawm lub regulating valve, uas ua rau muaj kev sib tw thrust raws li lub teeb liab siab, yog li ntawd lub laub qws ua rau lub sij hawm ntawm kev hloov, yog li tsav lub spool ntawm lub modulating valve txav mus. Nws txuas ncaj qha nrog qhov nruab nrab thiab dhau los ntawm kev hloov pauv ntawm tus actuator laub pas nrig, qhov throttling cheeb tsam ntawm lub regulating valve yog hloov mus cuag lub hom phiaj ntawm kev tswj, tswj li qub feem ntau muab faib ua peb hom: pneumatic tswj li qub, hluav taws xob tswj. li qub, thiab hydraulic tswj li qub raws li lawv lub zog qhov chaw. Qhov sib txawv yog nyob rau hauv qhov sib txuam actuators. Lub pneumatic tswj valve siv compressed cua raws li lub hwj chim qhov chaw, thiab yog nruab nrog ib tug pneumatic actuator; hluav taws xob tswj valve siv hluav taws xob raws li lub hwj chim qhov chaw, thiab yog nruab nrog ib tug hluav taws xob actuator; hydraulic tswj valve siv hydraulic siab raws li lub hwj chim qhov chaw, thiab yog nruab nrog ib tug actuator. Raws li kev xav tau, lub valve moduulating tuaj yeem nruab nrog ntau yam khoom siv los ua kom yooj yim rau kev siv, ua haujlwm zoo dua qub, thiab ua haujlwm zoo dua. Cov khoom siv no muaj xws li valve positioners, handwheel mechanisms, thiab hluav taws xob converters
Valve bonnet daim ntawv
Kev xaiv ntawm valve lub cev khoom
Cov hauv paus ntsiab lus ntawm kev xaiv cov khoom siv
Cov khoom siv kub kub
Raws li cov khoom siv high-temperature, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xav txog qhov kub-kub lub zog, kev hloov ntawm metallographic qauv ntawm qhov kub thiab txias thiab corrosion kuj. Nws yog feem ntau yuav tsum tau cov ntaub ntawv hlau alloy muaj chromium, nickel, thiab molybdenum cov ntsiab lus. Tsis tas li ntawd, ntawm qhov kub thiab qhov siab, cov hlau yog corroded los ntawm hydrogen, uas feem ntau ua rau decarburization thiab embrittlement. Tom qab cov ntsiab lus hlau xws li chromium, npib tsib xee, molybdenum ntxiv rau cov hlau, nws txuas nrog cov ntsiab lus carbon los txhim kho hydrogen corrosion kuj ntawm cov hlau.
Cryogenic khoom
Thaum xaiv cov ntaub ntawv kub-kub, nws yog ib qho tsim nyog yuav tsum tau ua tib zoo xav txog qhov ntsuas kub tsis tshua muaj nqi ntawm cov khoom, thiab tseem xav txog qhov brittleness ntawm cov khoom uas txo cov toughness ntawm qhov kub thiab txias. Yog li ntawd, cov ntaub ntawv uas siv nyob rau hauv uas tsis muaj kub tej yam kev mob yuav tsum muaj txaus toughness ntawm tsawg kub. Cov ntaub ntawv hlau siv rau cov li qub ntawm qhov sib txawv ntawm qhov kub thiab txias yuav tsum ncav cuag qhov cuam tshuam lub zog uas tau teev tseg hauv tus qauv ntawm qhov ntsuas kub kom muaj kev nyab xeeb thiab txhim khu kev qha. Austenitic stainless hlau muaj qhov ruaj khov qis-kub txhua yam khoom, yog li nws feem ntau siv.
Cavitation resistant khoom
Thaum cov kua dej yog cov kua, tshwj xeeb tshaj yog thaum flashing lossis cavitation tshwm sim, cavitation tsis kam ntawm cov khoom yuav tsum tau txiav txim siab tag nrho. Cavitation-resistant cov ntaub ntawv feem ntau muab faib ua ob hom:
a. High hardness khoom. (Cov txheej txheem kho cua sov ua kom cov tawv tawv ntxiv);
b. Cov khoom siv nrog lub zog oxide txheej, siab toughness thiab qaug zog. (Kev kho cua sov saum npoo txhim kho qhov tawv tawv ntawm cov khoom);
c. Locally hardened cov ntaub ntawv. (kev kho saum npoo);
Corrosion resistant khoom
Tus nqi ntawm corrosion ntawm cov ntaub ntawv hlau feem ntau yog muab faib ua feem ntau corrosion, crevice corrosion, intergranular corrosion, qhov corrosion, kev nyuaj siab corrosion, thiab lwm yam. Tsis muaj ib qho khoom siv yog resistant rau txhua yam corrosion. Qhov tseeb, corrosivity ntawm cov ntaub ntawv kuj muaj feem xyuam rau cov kua hom, concentration, kub, thiab seb cov kua muaj oxidant thiab txaus tus nqi, uas ua rau cov kev xaiv ntawm cov ntaub ntawv nyuaj. Feem ntau siv cov khoom siv corrosion-resistant rau kev tswj li qub yog cov ntaub ntawv tseem ceeb xws li PTFE thiab F46, lossis ntau yam hlau tshwj xeeb xws li austenitic stainless hlau, 20# alloy steel, Hastelloy B, Hastelloy C, thiab titanium nrog tus nqi siab.
Valve Internal Component Khoom
Txoj kev tseem ceeb ntawm kev kho hardening
Cov khoom siv feem ntau siv rau cov khoom siv hauv lub valve yog SUS304, SUS316, SUS316L. SUS410, SUS420, thiab lwm yam, raws li cov dej sib txawv, kev kho mob yuav tsum tau ua. Hardening yuav tsum tau nqa tawm rau kev tswj cov kua cavitation, cov kua dej uas muaj cov khoom siv, thiab lub sijhawm kub thiab kub siab. kev kho mob kom ntev lub neej kev pab cuam ntawm lub valve.
Kev kho cua sov
a.304/316 kev daws teeb meem Cov khoom siv no yog austenitic stainless hlau thiab feem ntau yog siv hauv cov xov xwm corrosive lossis cov ntawv thov kub. Thaum nruab nrab yog corrosive heev, nws yuav tsum tau kho nrog cov tshuaj tov khoom. Lub hom phiaj ntawm kev kho tshuaj yog los txhim kho hardness thiab corrosion kuj ntawm cov ntaub ntawv. Qhov kub thiab txias -196 ~ 530 degree
b.410/420 quenching thiab tempering kho (quenching + tempering) Cov khoom siv no yog martensitic stainless hlau, uas yog cov khoom siv zoo heev cavitation-resistant, thiab nws yuav tsum tau quenched thiab tempered thaum siv high-temperature thiab high-pressure sib txawv. daim ntawv thov. Lub hom phiaj ntawm quenching thiab tempering kev kho mob yog ua kom cov hardness ntawm cov khoom thiab ua rau kom lub neej kev pab nyob rau hauv lub mob hnyav ua hauj lwm. Qhov kub thiab txias -45 ~ 425 degree
c.17-4PH nag lossis daus hardening kev kho mob Raws li cov tshuaj muaj pes tsawg leeg ntawm cov hlau tsis muaj steel, ntau hom thiab ntau ntxiv ntawm cov khoom ntxiv, thiab ntau hom thiab ntau ntawm carbides, nitrides, carbides thiab intermetallic compounds yog precipitated los ntawm cov nag lossis daus hardening txheej txheem, uas tsis tsuas yog txhim kho lub zog ntawm cov hlau, tab sis kuj tswj kom txaus toughness. Ib chav kawm ntawm high-strength stainless hlau, hu ua nag lossis daus hardening. Qhov kub thiab txias -45 ~ 425 degree
Nto hardening
Kev kho cua sov saum npoo yog muab faib ua ob pawg: nto quenching thiab deg tshuaj kho cua sov. a. Nplaim cua sov nto quenching, tiv tauj hluav taws xob cua sov nto quenching, induction cua sov nto quenching, thiab lwm yam b. Carburizing, nitriding, carbonitriding, boronizing chromium, copperizing, thiab lwm yam.
Surface kho
Stellite surfacing (cov khoom tseem ceeb Co, Cr, W) yog ib txoj kev siv hardening kev kho mob zoo heev corrosion kuj. Muaj ob txoj hauv kev ntawm Stellite surfacing welding, tag nrho surfacing welding thiab ib nrab surfacing vuam. Tsis muaj cov txheej txheem kev cai rau cov txheej txheem tshwj xeeb surfacing welding, thiab nws feem ntau yog nyob ntawm qhov sib txawv thiab qhov kub thiab txias ntawm cov kua dej thiab seb cov kua dej puas muaj cov khoom. Cov hom ntawm surfacing welding yog raws li nram no:
Kev xaiv cov khoom sib khi hauv lub valve
Taw qhia ntawm qhov sib npaug foob nplhaib
Caij nplooj ntoos hlav-activated PTFE cov ntsaws ruaj ruaj yog cov ntsaws ruaj ruaj uas muaj kev tshwj xeeb hauv U-shaped PTFE. Tsim nyog lub caij nplooj ntoos hlav quab yuam ntxiv rau qhov system ntws siab thawb tawm lub sealing ua hauj lwm di ncauj thiab maj mam nias lub kaw ntom nti los tsim ib tug zoo sealing nyhuv. Nws sealing ua hauj lwm daim di ncauj yog optimally luv luv thiab tuab rau txo kev sib txhuam thiab lub neej ntev.
Cim npe nrov: dn80 hluav taws xob ua dej ntws tswj valve, Tuam Tshoj, tuam ntxhab, lwm tus muag khoom, Hoobkas, yuav, nqe, hais
