Chumigate valve a nihi general valve hman tlanglawn tak a ni a, hmanna hrang hrang a nei bawk. Tui humhalhna, metallurgy leh industry dang dangah te hman a ni ber. A hmanna zau tak chu hriat hlawh tak a nized chu market a ni. Kum tam tak quality leh technical supervision leh testing ka neih chhung hian a ziaktu hian gate valve detection chungchangah research engemaw zat a nei mai bakah gate valve hman dan pawh a nei a, uluk zawk leh uluk zawkin research ka nei a ni
A hnuaia tarlan te hi gate valve structure, hman dan, troubleshooting, quality inspection leh a dangte chungchang sawihona tlangpui a ni.
A structure pakhat
A insiam dan tur chugate valve a ni: Chumigate valve a nitih a ni avalve a nichu chuan gate plate leh valve seat hmangin hawn leh khar dan a control thin. Chumigate valve a nia bik takin valve body, valve seat, gate plate, valve stem, valve cover, packing letter, packing pressure cover, valve stem nut, kut te a ni-wheel, etc. Gate leh valve seat inkar relative position inthlak dan azirin channel size pawh thlak danglam theih a ni a, channel pawh tihtawp theih a ni bawk. Gate valve khar nghet tur chuan gate plate leh valve seat chu ground a ni.
Gate valve structure pianzia hrang hrang a zirin gate valve hi chi hnih ah then theih a ni a, wedge leh parallel te an ni.
Wedge gate valve gate plate chu a pianzia a ni a, sealing surface chu channel center line-ah a innghat a ni. Gate plate leh valve seat inkar wedge chu seal (close) nan hman a ni. Wedge plate hi gate pakhat emaw, gate pahnih emaw pawh a ni thei.
Parallel gate valve sealing surface chu a inzawm tlat a, channel center line nen a perpendicular a ni. Chi hnih ah then a ni a, open mechanism leh non-opening mechanism te an ni. Double gate a awm a, open mechanism a awm bawk. Gate a tlak chuan parallel gate pahnih wedge te chuan slope-a valve seat-a gate pahnih chu a thlawp a, flow channel chu a titawp a ni. Gate a lo sang a, a inhawng chuan shovel leh gate chu gate nen an thawkdun a, gate chu a sang deuhah a sang a, wedge chu con The double gate plate without an open mechanism hmangin a vawn chho a ni. Gate plate chu parallel valve seat surface pahnih zawhin valve seat-ah a tlan lut a, chu chuan fluid pressure hmangin valve outlet lam a valve body-a gate plate chu press a, fluid chu seal a ni.
Gate hawn leh khar huna valve stem che dan hrang hrang a zirin gate valve hi chi hnih ah then a ni a, open-bar gate valve leh dark-bar gate valve te an ni. Open-bar gate valve-a valve stem leh gate plate chu hawn emaw khar emaw a nih chuan a rualin an chho leh a; dark-bar gate valve hawn emaw khar emaw a nih chuan valve stem chu a inher chauh a, valve stem sang leh tlak chu hmuh theih a ni lo va, valve plate chu a sang emaw a hniam emaw a ni. Open-bar gate valve thatna chu valve stem sang chho zel hmangin channel hawnna san zawng a teh thei a, mahse possession san zawng a ti tawi thei thung. Kut lam hawi a nih chuan-wheel emaw handle emaw, kut chu herh rawh-wheel emaw handle emaw chu darkar lam hawiin, valve chu khar a ni.
Gate valve pahnihna hman dan tur occasion leh selection principle:
01 flat a nigate valve a ni
Flat gate valve hman dan:
(1) Oil leh natural gas transmission pipeline, flat gate valve diversion hole nei te pawh pipeline tihfai nan a remchang hle.
(2) Transmission pipeline leh refined oil dahna hmanrua.
(3) Oil leh natural gas lakchhuahna port hmanrua.
(4) Pipe-ah chuan suspended particle media a awm.
(5) Khawpui chhunga gas thawn chhuahna pipeline.
(6) Tui pekna tur project.
Flat gate valve thlan dan tur chu:
(1) Oil leh natural gas transmission pipeline atan chuan flat gate valve, gate pakhat emaw, gate pahnih emaw nei thlang rawh. Pipeline tihfai i mamawh chuan flat gate valve, gate pakhat, diversion hole nei thlang rawh.
(2) Refined oil transmission pipeline leh dahna hmanrua atan chuan diversion hole nei lo gate pakhat emaw, gate pahnih nei flat gate valve emaw thlang rawh.
(3) Oil leh natural gas lakchhuahna port device atan chuan gate pakhat, dark rod floating valve seat, diversion hole nei emaw, flat gate valve, double gate nei emaw thlang rawh.
(4) Suspended particle media nei pipe tan chuan chemte ang maia plate gate valve thlang rawh.
(5) Khawpui chhunga gas transmission pipeline atan chuan single gate emaw double gate soft seal open rod flat gate valve emaw thlang rawh.
(6) Tui supply engineering atan chuan diversion hole open rod flat gate valve nei lo single gate plate emaw double gate plate emaw thlang rawh.
02 a nigate valve a ni
Wedge gate valve hman dan tur: Valve chi hrang hrang zingah gate valve hi hman lar tak a ni. A tlangpuiin full opening emaw full closing emaw atan chauh a tha a, regulation leh throttling atan pawh hman theih a ni lo.
Wedge gate valve hi a tlangpuiin valve pawn lam size tur khauh taka tih ngai lohna hmunah hman a ni a, hman dan pawh a khauh hle. Entirnan, high-temperature leh high-pressure working medium atan chuan a khar tawhte chu rei tak sealed a ngai a ni.
A tlangpuiin, hman dan emaw mamawh sealing performance rintlak, pressure sang, pressure sang cut-off (pressure danglamna lian tak), pressure hniam cut-off (pressure danglamna tenau), ri hniam, air hole leh vaporisation phenomenon, temperature sang medium, temperature hniam (deep cold) a nih chuan puncture gate valve hman a tha. Entirnan, power industry-ah te, petroleum smelting-ah te, petrochemical-ah te, offshore oil-ah te, khawpui saknaah water engineering leh sewage treatment engineering-ah te, chemical industry-ah te hmanna tam tak a awm a.
Selection principle: 1.1.
(1) Valve-a fluid awm dan tur mamawh. Gate valve hi hnathawhna hmuna flow resistance tlem, circulation ability chak, flow characteristic tha leh sealing khauh tak mamawhna atan hman a ni.
(2) Temperature sang leh pressure sang medium. Pressure sang steam, high-temperature leh high-pressure oil atanga siam te ang chi te.
(3) Temperature hniam (deep cold) medium. Liquid ammonia, liquid hydrogen, liquid oxygen leh media dangte ang chi te.
(4) Pressure hniam leh lianlenzawng tehna. Tap tui project leh bawlhhlawh sawngbawlna project ang chi te.
(5) Installation position: installation san zawng a tlem laiin dark rod gate valve thlang la; a san zawng a tlem laiin open rod gate valve chu thlang rawh.
(6) A hawn kim emaw, a khar kim theih emaw, siamrem leh throttling atana hman theih loh hunah chauh puncture gate valve chu thlan theih a ni.
Fault tlangpui pathum leh maintenance
01 Gate valve-a chhiatna awm fo leh a chhan
Gate valve hman hnuah hian contact tin temperature, pressure, corrosion leh relative movement vangin a hnuaia harsatna te hi a awm fo thin.
(1) Leakage: A chi hnih a awm a, chungte chu pawn lam atanga leakage leh internal leakage te an ni. Valve pawna leakage awm chu leakage an ti a, packing box leh flange connection-ah pawh leakage hi a awm fo thin.
Packing box a leak chhan: packing chi hrang hrang emaw quality emaw hian a mamawh a tlin lo; packing a upa tawh emaw, valve stem a chhe tawh emaw; packing gland a lo chhuah dan; valve stem chunglam a scratching awm chu.
Flange connection-a leakage awm chhan: gasket material emaw size emaw hian a mamawh a tlin lo; flange sealing surface-a processing quality a tha lo hle a; connection bolt te chu dik lo takin an inbun a; pipeline configuration chu a dik lo a, chu chuan connection-ah load additional tam lutuk a siam a ni.
Valve chhunga leakage awm chhan: Valve lax closure avanga leakage awm hi internal leakage a ni a, chu chu valve sealing surface emaw sealing ring lax root emaw a chhiat vang a ni.
(1) Corrosion hi valve body, valve cover, valve stem leh flange sealing surface te corrosion a ni fo thin. Corrosion hi medium hnathawh vang a ni ber a, filler leh gasket-a ion chhuah vang pawh a ni.
(2) Scratch: local surface pulling emaw peeling emaw hi gate plate leh valve seat te chu contact ratio pressure engemaw zat hnuaia relative motion-a an awm hian a thleng thin.
02 Gate valve enkawl dan tur
(1) Valve pawn lam atanga leak awm siamthat
Filler i press dawnin upper gland bolt chu a rit tur a ni a, chu chu gland tilt loh nan a ni a, compression atan gap a awm tur a ni. Filler press lai hian valve stem chu a inher tur a ni a, chu chu valve stem vel a filler chu a inang tlang tur a ni a, pressure a thih loh nan, chutiang chuan valve stem inherna a nghawng lo ang a, filler a wear a tipung ang a, service life pawh a ti tawi ang. Valve stem chunglam chu a hrual a, chutiang chuan medium chu a leak chhuak awlsam hle. Valve stem chunglam a scratch awmte tihbo nan hman hmain process tur a ni.
Flange connection leakage atan chuan gasket a chhiat chuan thlak leh tur a ni; gasket material thlan dik a nih loh chuan hmanna atana thil tul phuhruk thei tur chu thlan tur a ni; flange sealing surface chu processing quality tha lo a nih chuan flange sealing surface chu lakchhuah a ngai a, a qualify hma loh chuan reprocess leh tur a ni.
Chu bakah, flange bolt te uluk taka tihkhauh te, pipeline dik taka configure te, flange connection-a load dang tam lutuk awm lohna te hian flange connection-a leakage awm lohna turin a tha hle bawk.
(2) Valve chhunga leakage siam that
Internal leakage siamthatna chu sealing surface chhiatna leh sealing ring root laxity (sealing ring chu valve plate emaw valve seat-a press emaw thread hmanga fix a nih chuan) tihbo nan a ni. Sealing surface chu valve body leh valve plate-ah direct-a process a nih chuan lax roots leh leakage-ah harsatna a awm lo.
Sealing surface a chhiat nasat a, sealing surface chu sealing ring atanga siam a nih chuan ring hlui chu la chhuakin sealing ring thar dah tur a ni sealing surface chu valve body-ah direct-a process a nih chuan sealing surface chhia chu lakchhuah hmasak tur a ni a, chutah chuan sealing ring thar emaw processed surface emaw chu ground-in sealing surface thar siam tur a ni. Sealing surface-a scratches, bumps, crushes, dents leh defects dangte chu 0.05mm aia tlem a nih chuan grinding hmangin tihbo theih a ni.
Sealing ring zung chu a leak a. Sealing ring chu press lut leh fix a nih chuan PTFE belt emaw white thick paint emaw chu valve seat emaw sealing ring groove hnuaiah dah theih a ni a, chutah chuan sealing ring chhungah press in sealing ring root chu a khat thei a ni. Sealing ring chu thread hmanga fix a nih chuan PTFE belt emaw white thick paint emaw chu thread inkarah dah tur a ni Leakage between the lines.
(3) Valve corrosion siamthat
A tlangpuiin valve body leh valve cover chu a inang tlangin a corroded a, valve stem erawh a pitting fo thung. Siamthat dawnin corrosive product chu paih hmasak tur a ni. Pitting pits nei valve stem tan chuan depression tihbo nan lathe-ah process tur a ni a, sustained-release agent awmna filler-ah thlak tur a ni a, a nih loh leh filler chhunga ion awmte chu distilled water hmanga tihfai tur a ni a, chu chuan valve stem-a corrosive effect a nei tur a ni.
(4) Sealing surface-a abrasion awmte siamthat
Valve hman chhung hian sealing surface-a abrasion awmte chu a theih ang anga ven tur a ni a, valve khar hunah torque lian lutuk lo tur a ni. Sealing surface-a abrasion awmte chu grinding hmanga tihbo theih a nih chuan.
Gate valve pali hmuhchhuah
Tuna market boruak leh user mamawhnaah hian iron gate valve hian a tam zawk a luah a ni. Product quality inspector i nih angin product quality testing i hriat chian bakah hian product ngei pawh i hriatthiam a ngai bawk.
01 Thir gate valve test dan tur
Iron gate valve hmuhchhuahna hi ram pum huap standard GB/T12232-2005 ”General valve flange connection iron gate valve” hmanga hmuhchhuah a ni.
02 Thir gate valve enfiahna tur thil
A bik takin: logo, * wall thickness te, pressure test, shell test, etc. Chung zingah chuan wall thickness, pressure leh shell test te hi enfiahna atana thil tul leh thil pawimawh tak tak a ni. Thil tling lo a awm chuan direct-in thil tling lo anga ngaih theih a ni.
Thumal khata sawi chuan, product quality inspection hi product inspection pumpuiah hian thil pawimawh tak a ni. A pawimawhzia chu a lang chiang hle. Front-line inspection staff kan nih angin mahni quality kan tihchak reng a ngai a ni. Product inspection-ah hna tha kan thawk mai ni lovin, kan inspection tawhte hriatthiamna kan nei tur a ni a, chutiang chuan inspection lamah hna tha zawk kan thawk thei ang.
Post hun chhung: Mar-23-2023
