ductile iron rabara yosindikiza gulugufe valavu

Kampani ya Henry Pratt ndiyomwe ikutsogolera kupanga mavavu ndi zolumikizira, ali ndi zaka zopitilira 60 popereka ntchito kumakampani opanga magetsi. Pratt adadziwitsidwa kumakampani opanga magetsi pogwiritsa ntchito kukonza mu Edison Federal Building ku Chicago. Malowa anali amodzi mwa opanga magetsi a Edison panthawiyo. M'mapaipi amadzi omwe mulibe valavu ndipo mutuwo ndi wawung'ono, valve ikufunika. Kampani ya Henry Pratt idafunsidwa kuti ipange valavu yolumikizirana kuti ithetse vutoli. Mapangidwe ake ndi valavu ya gulugufe yotanuka, yomwe tsiku lina idzakhala chinthu chachikulu pakampani. Mpaka pakati pa zaka za m'ma 1940, Pratt & Whitney anapitirizabe kupanga ma valve agulugufe okhala pansi mosinthasintha malinga ndi momwe zinalili, koma nkhondo yachiwiri ya padziko lonse itatha, Pratt & Whitney adaganiza zopanga mzere wa mphamvu ndi madzi. Masiku ano, Henry Pratt wakhala mtsogoleri pamisika yamagetsi ndi madzi. Valavu yamadzi a nyukiliya ya 1100 ndi gawo la ASME 2 ndi valavu ya butterfly yokhudzana ndi chitetezo cha nyukiliya ya 3, kuyambira kukula kwa mainchesi 6 mpaka 36 mainchesi (ndi zazikulu monga zikufunikira). Mapangidwe ake ndi oyenera kukakamiza muyezo wa ANSI 150 #. Kwa ma valve akuluakulu kuposa 24in ndi 75 psig service level, amakwaniritsa zofunikira za ASME Sec. Perekani gulu la code III 1678. Zomwe zimapangidwira mndandanda wa 1100 zimaphatikizapo thupi la valve flanged lopangidwa ndi zipangizo zomwe zimakumana ndi SA-216, Gr. WCB kapena SA-516, Gr. 70; Chimbale cha valve, chomwe chingapangidwe kapena kuponyedwa, kapena chopangidwa ndi chitsulo cha carbon, pamene carbon steel disc ili ndi zitsulo zosapanga dzimbiri valavu mpando m'mphepete kuphimba m'lifupi lonse la okwera pamwamba; ndi mpando wa valavu ya mphira, yomwe imakhala yokhazikika kapena yokhazikika pamakina pa valve Mu thupi, palibe zomangira za ulusi zomwe zimafunikira. Mtsinje wa valve ukhoza kukhala gawo limodzi lomwe limadutsa mu diski ya valve, kapena ikhoza kupangidwa ndi nthiti ziwiri zomwe zimalowetsedwa mu nthiti ya valve. Vavu ya mpweya wa nyukiliya ya 1200 ndi ASME Class 2 ndi Class 3 yokhudzana ndi chitetezo cha nyukiliya yamtundu wa butterfly, kuyambira kukula kuchokera ku 6 mpaka 48in. Mapangidwe apangidwe ndi ofanana ndi mndandanda wa 1100. Mofanana ndi mndandanda wa 1100, mapangidwe a mndandanda wa 1200 amaphatikizapo thupi la flange, chojambula chokhazikika kapena chopangidwa ndi chitsulo chachitsulo chokhala ndi mpando wa mphira wokhazikika komanso wosinthika, ndipo tsinde la valve likhoza kukhala chidutswa chimodzi kapena chimodzi- kapangidwe ka chidutswa. Shaft yamitundu iwiri. Vavu yamadzi a nyukiliya ya 1400 ndi ASME level 2 ndi 3 valavu ya butterfly yokhudzana ndi chitetezo cha nyukiliya, kuyambira kukula kuchokera mainchesi 3 mpaka 24 mainchesi. Mawonekedwe apangidwe akugwiritsidwa ntchito pamtundu wapakati wa ANSI 150 #. Zomwe zimapangidwira ndi zida zamapangidwe a mndandanda wa 1400 ndizofanana ndi za mndandanda wa 1100, ndipo ntchito zawo ndizofanana. Valavu yagulugufe yosindikizidwa ndi mphira ya Triton XR-70 imakwaniritsa zofunikira za AWWA C504, kukula kwake kuyambira mainchesi 24 mpaka 144 mainchesi. Mawonekedwe amtundu wa valve ndi flange x flange end, mechanical joint (MJ) mapeto (24in-48in) ndi flange ndi MJ mapeto (24in, 30in ndi 36in). Zinthu za Triton zikuphatikiza mapangidwe a mpando wa Pratt E-Lok ndi kapangidwe ka tray yozungulira. Mapangidwe a mpando wa valve wa E-Lok amavomerezedwa, ndipo mpando wa valve wa rabara umayikidwa mu thupi la valve kuti utseke mpweya. Poyerekeza ndi mapangidwe ena aliwonse omwe ali pamsika pano, mapangidwe amtundu wa diski amakwaniritsa mphamvu zapamwamba ndi kulemera kopepuka. Ulalo wamakampani www.henrypratt.com