I-Taboo 21

Indawo yokufaka ayinandawo yokusebenza

Amanyathelo: Nokuba ukufakelwa ekuqaleni kunzima, kubalulekile ukuqwalasela umsebenzi wexesha elide womqhubi ngelixa ebeka i-ivalvuukuze kusebenze. Ukuze kuvulwe kwaye kuvalweivalvuKulula, kuyacetyiswa ukuba ivili lesandla levalvu libekwe ngendlela yokuba lilingane nesifuba (ngesiqhelo liziimitha ezili-1.2 ukusuka kumgangatho wegumbi lokutyalela). Ukuthintela ukusebenza okungaqhelekanga, ivili lesandla levalvu yokufika kufuneka lijonge phezulu kwaye lingathambeki. Iivalvu zomatshini wodonga kunye nezinye izinto kufuneka zivumele indawo eyaneleyo yokuba umqhubi ame. Kuyingozi kakhulu ukusebenza esibhakabhakeni, ingakumbi xa usebenzisa i-acid-base, imidiya enobungozi, njl.njl.

I-Taboo 22

Iivalvu ezenziwe ngezinto ezibuthathaka

Amanyathelo: Xa ufaka kwaye wakha, lumka kwaye uhlale kude neevalvu zezinto ezibuthathaka. Jonga ivalvu, iinkcukacha, kunye neemodeli ngaphambi kokufaka, kwaye ujonge nawuphi na umonakalo, ngakumbi kwisiqu sevalvu. Isiqu sevalvu sinokuthi sigobe ngexesha lokuthunyelwa, ngoko ke sijike amaxesha ambalwa ukujonga ukuba sinjalo na. Coca ivalvu nayo nayiphi na inkunkuma. Ukuze uphephe ukonakalisa ivili lesandla okanye isiqu sevalvu xa uphakamisa ivalvu, intambo kufuneka ibotshelelwe kwiflange endaweni yokuba ibotshelelwe nakweyiphi na kwezi zinto. Uqhagamshelo lombhobho wevalvu kufuneka lucocwe. Ukuze ususe iitships ze-iron oxide, isanti yodaka, i-welding slag, kunye nezinye izinto ezahlukeneyo, sebenzisa umoya ocinezelweyo. Amasuntswana amakhulu e-welding, afana ne-welding slag, anokuthintela iivalvu ezincinci kwaye azenze zingasebenzi ukongeza ekukrweleni lula umphezulu wokuvala wevalvu. Ukuze kuthintelwe ukwakheka kwevalvu kunye nokuphazamiseka kokuhamba kombane, ukupakisha kokuvala (i-line hemp kunye ne-lead oil okanye i-PTFE raw material tape) kufuneka kusongelwe kumsonto wepayipi ngaphambi kokuba kuqhotyoshelwe ivalvu yesikrufu. Qinisekisa ukuba uziqinisa ngokulinganayo nangokulinganayo iibholithi ngelixa ufaka iivalvu ezijijekileyo. Ukuze uphephe ukuba ivalvu ingabi noxinzelelo oluninzi okanye iqhekeke, iflange yepayipi kunye neflange yevalvu kufuneka zilingane kwaye zibe nomlinganiselo ofanelekileyo wokuvula. Izinto ezibuthathaka kunye neevalvu ezinamandla aphantsi zifuna ingqalelo ekhethekileyo. Iivalvu ezijijelweyo ngepayipi kufuneka zijijelwe kuqala, zilandelwe kukuvulwa ngokupheleleyo kwamacandelo okuvala, kwaye ekugqibeleni, i-welding efileyo.

I-Taboo 23

Ivalvu ayinazo iindlela zokugcina ubushushu kunye nokubanda

Amanyathelo: Ezinye iivalvu ziyafuneka ukuba zibandakanye iimpawu zokhuseleko lwangaphandle zokugcina ubushushu nokubanda. Ngamanye amaxesha umbhobho womphunga oshushu wongezwa kumaleko wokugquma. Uhlobo lwevalvu ekufuneka igcinwe ishushu okanye ibanda luxhomekeke kwiimfuno zokwenziwa. Ngokwethiyori, ukugcinwa kobushushu okanye nokuba kulandelelwa kobushushu kuyadingeka ukuba indawo ephakathi kwevalvu iphola kakhulu, nto leyo eya kunciphisa ukusebenza kakuhle kwemveliso okanye ibangele ukuba ivalvu iqine. Ngokufanayo, xa ivalvu iveziwe, into embi kwimveliso okanye ebangela iqabaka nezinye izinto ezingafunekiyo, ivalvu kufuneka igcinwe ibanda. Izinto zokugquma ezibandayo ziquka i-cork, i-perlite, i-foam, iplastiki, i-diatomaceous earth, i-asbestos, i-slag wool, i-glass wool, i-perlite, i-diatomaceous earth, njl.

I-Taboo 24

Umgibe womphunga awufakelwanga nge-bypass

Iindlela zokulinganisa: Ezinye iivalvu zinezixhobo kunye nee-bypasses ukongeza kwiimpawu zokhuseleko ezisisiseko. Ukuze kube lula ukugcina umgibe, kufakwe i-bypass. Kukho iivalvu ezininzi ezifakwe i-bypass. Imeko, ukubaluleka, kunye neemfuno zokuveliswa kwevalvu zigqiba ekubeni i-bypass kufuneka ifakwe na.

I-Taboo 25

Ukupakisha akutshintshwa rhoqo

Amanyathelo: Ezinye iipakeji zeevalvu ezisesitokhweni kufuneka zitshintshwe kuba azisebenzi okanye azihambelani nesixhobo esisetyenziswayo. Ibhokisi yokuzalisa isoloko izaliswe kukupakisha okuqhelekileyo kwaye ivalvu ivezwa kumawaka eemidiya ezahlukeneyo, nangona kunjalo xa ivalvu isebenza, ukupakisha kufuneka kwenziwe ngokwezifiso kwimidiya. Cinezela ukupakisha endaweni ngokuhamba-hamba ngezangqa. Umthungo wesangqa ngasinye kufuneka ube ngama-degrees angama-45, kwaye imithungo yezangqa kufuneka ibe ngama-degrees ali-180. Inxalenye esezantsi yegland ngoku kufuneka icinezelwe kubunzulu obufanelekileyo begumbi lokupakisha, obuqhele ukuba yi-10-20% yobunzulu begumbi lokupakisha. Ukuphakama kokupakisha kufuneka kuthathele ingqalelo oku. I-engile yomthungo yeevalvu ezinemigangatho engqongqo yi-degrees ezingama-30. Imithungo yesangqa yahlukile ngama-degrees ali-120 ukusuka kwenye. Iiringi ezintathu ze-O-ringi zerabha (irabha yendalo engamelaniyo ne-alkali ebuthathaka ngaphantsi kwama-60 degrees Celsius, irabha ye-nitrile engamelaniyo nemveliso yeoyile ngaphantsi kwama-80 degrees Celsius, kunye nerabha ye-fluorine engamelaniyo neentlobo ngeentlobo ze-corrosive media ezingaphantsi kwama-150 degrees Celsius) nazo zingasetyenziswa, kuxhomekeke kwiimeko, ukongeza kwi-fillers ezikhankanyiweyo apha ngasentla. Iiringi zesitya se-nylon (zingamelaniyo ne-ammonia kunye ne-alkali ngaphantsi kwama-120 degrees Celsius), iiringi ze-polytetrafluoroethylene ezifakwe i-laminated (zingamelaniyo ne-corrosive media enamandla engaphantsi kwama-200 degrees Celsius), kunye nezinye izizalisi ezimile okwemilo. Songa umaleko weteyiphu ye-polytetrafluoroethylene eluhlaza ngaphandle kwephakheji ye-asbestos eqhelekileyo ukuphucula ukutywinwa kunye nokunciphisa ukuwohloka kwesiqu se-valve ngenxa yesenzo se-electrochemical. Ukugcina indawo ilungelelene kwaye uyigcine ingafi kakhulu, jikelezisa isiqu se-valve ngelixa ucinezela ukupakisha. Musa ukuthambekela ngelixa uqinisa i-gland ngomzamo oqhubekayo.