{"id":1668,"date":"2021-12-28T08:50:17","date_gmt":"2021-12-28T08:50:17","guid":{"rendered":"https:\/\/zecovalve.com\/spotlight-back-seating-on-api600-wedge-gate-valves-zeco.html"},"modified":"2022-10-17T12:57:43","modified_gmt":"2022-10-17T12:57:43","slug":"spotlight-back-seating-on-api600-wedge-gate-valves-zeco","status":"publish","type":"post","link":"https:\/\/zecovalve.com\/tr\/spotlight-back-seating-on-api600-wedge-gate-valves-zeco.html","title":{"rendered":"S\u00fcrg\u00fcl\u00fc Vana Arka Koltuk Testi \u2013 Bir Vanan\u0131n Arkaya Oturtulmas\u0131"},"content":{"rendered":"

Arka Koltuk Nedir?<\/h2>\n\n\n\n

Arka koltuk, kaputun i\u00e7indeki oturma d\u00fczenidir. <\/p>\n\n\n\n

Mil ile kapak aras\u0131nda bir s\u0131zd\u0131rmazl\u0131k sa\u011flar ve valf tamamen a\u00e7\u0131kken valf salmastras\u0131na kar\u015f\u0131 sistem bas\u0131nc\u0131n\u0131n olu\u015fmas\u0131n\u0131 \u00f6nler. Arka koltuklar genellikle s\u00fcrg\u00fcl\u00fc ve k\u00fcresel vanalarda uygulan\u0131r.<\/p>\n\n\n\n

Valf Arka Koltuk Test Bas\u0131nc\u0131<\/h2>\n\n\n\n

Test bas\u0131nc\u0131, 38 \u00b0C'de (100 \u00b0F) 110% izin verilen maksimum bas\u0131n\u00e7tan az olmayacakt\u0131r. \u00d6rne\u011fin A216 Gr'li 900 Ib, 20 in\u00e7lik bir vanan\u0131z varsa. WCB malzemesi, MAP'\u0131n\u0131z 2252 psi olacakt\u0131r (Tablo 2-1.1 ASME B16.34'e g\u00f6re). Bu de\u011ferin 110 %'si 2477 psi olacakt\u0131r. Yani arka koltuk test bas\u0131nc\u0131n\u0131z 2477 psi olacakt\u0131r.<\/p>\n\n\n\n

Arka Koltuk Test S\u00fcresi<\/h2>\n\n\n\n

Valf test s\u00fcresi API Std 598'e g\u00f6re valf boyutuna ba\u011fl\u0131d\u0131r. Test s\u00fcresi 2 in\u00e7ten k\u00fc\u00e7\u00fck valfler i\u00e7in 15 saniye, 2 in\u00e7ten b\u00fcy\u00fck valfler i\u00e7in 60 saniyedir.<\/p>\n\n\n\n

Valf salmastra bilezi\u011fi, arka koltuk test bas\u0131nc\u0131 alt\u0131ndayken yak\u0131ndan incelenmelidir. Valf kabuk testine benzer \u015fekilde, arka koltuk testinde de s\u0131z\u0131nt\u0131 kabul edilemez.<\/p>\n\n\n\n

Vanalar\u0131n Neden Arka Koltu\u011fa \u0130htiyac\u0131 Var?<\/h2>\n\n\n\n

Ambalaj a\u00e7\u0131ld\u0131\u011f\u0131nda \u00e7al\u0131\u015fma bas\u0131nc\u0131na maruz kal\u0131r. Arka koltuk yap\u0131s\u0131 varsa, \u00e7al\u0131\u015fma ortam\u0131 bas\u0131nc\u0131n\u0131n s\u0131zd\u0131rmazl\u0131k contas\u0131na etki etmesi \u00f6nlenebilir ve valfin harici bir s\u0131z\u0131nt\u0131ya neden olmamas\u0131 i\u00e7in s\u0131zd\u0131rmazl\u0131k contas\u0131n\u0131n \u00f6mr\u00fc uzat\u0131labilir.<\/p>\n\n\n\n

Di\u011fer bir i\u015flev, s\u0131zd\u0131rmazl\u0131k salmastras\u0131nda s\u0131z\u0131nt\u0131 oldu\u011funda, \u00fcst s\u0131zd\u0131rmazl\u0131k k\u0131sm\u0131n\u0131 kapatmak i\u00e7in valfin tamamen a\u00e7\u0131labilmesi, b\u00f6ylece salmastra bilezi\u011finin veya salmastra man\u015fonunun salmastray\u0131 de\u011fi\u015ftirmek \u00fczere gev\u015fetilebilmesidir. Bu nedenle s\u00fcrg\u00fcl\u00fc vana, k\u00fcresel vana ve k\u0131sma vanas\u0131 i\u00e7in \u00fcst s\u0131zd\u0131rmazl\u0131k cihaz\u0131 gereklidir.<\/p>\n\n\n\n

Test s\u0131ras\u0131nda arka koltukta s\u0131z\u0131nt\u0131 yoksa, arka koltu\u011fa bir valfin yeniden yerle\u015ftirilmesi kabul edilebilir mi?<\/h2>\n\n\n\n

Arka koltuk testi yaln\u0131zca ortam s\u0131cakl\u0131\u011f\u0131ndaki suyla yap\u0131l\u0131r. Bu, vanan\u0131n kullan\u0131labilece\u011fi t\u00fcm servisler (\u00f6rne\u011fin, y\u00fcksek s\u0131cakl\u0131kta servis, tehlikeli veya zehirli gazlar vb.) i\u00e7in s\u0131zd\u0131rmazl\u0131k sa\u011flamaz.<\/p>\n\n\n\n

Baz\u0131 API standartlar\u0131nda, arka koltu\u011fun geli\u015fig\u00fczel kullan\u0131lmas\u0131na kar\u015f\u0131 uyar\u0131da bulunan bir dil bulunur. T\u00fcm standartlar ayn\u0131 de\u011fildir
dil a\u015fa\u011f\u0131da g\u00f6sterilmi\u015ftir (yani API 6D), ancak buradaki mesaj a\u00e7\u0131kt\u0131r.<\/p>\n\n\n\n

API 600, "\u00c7elik S\u00fcrg\u00fcl\u00fc Vanalar ve Al\u0131n Kaynak U\u00e7lar\u0131, C\u0131vatal\u0131 Kapaklar", b\u00f6l\u00fcm 5.8.9, \u015funu belirtir: "Arka oturma d\u00fczeni, t\u00fcm s\u00fcrg\u00fcl\u00fc ve k\u00fcresel vanalar i\u00e7in bir gerekliliktir ve bu nedenle, bir \u00fcreticinin tavsiyesini ima etme amac\u0131 ta\u015f\u0131maz. vana bas\u0131n\u00e7 alt\u0131ndayken salmastra eklemek veya de\u011fi\u015ftirmek amac\u0131yla kullan\u0131lmas\u0131 i\u00e7in\u201d.<\/p>\n\n\n\n

API 589, "Valf Denetimi ve Testi" b\u00f6l\u00fcm 6.2.3, "arka koltuk testinin ba\u015far\u0131yla tamamlanmas\u0131 bir tavsiye olarak yorumlanmayacakt\u0131r" diyor
Vana \u00fcreticisi taraf\u0131ndan, vana bas\u0131n\u00e7 alt\u0131ndayken vanan\u0131n yeniden paketlenebilece\u011fi veya salmastran\u0131n de\u011fi\u015ftirilebilece\u011fi."<\/p>\n\n\n\n

ZECO Valfi iyi bir 12 in\u00e7 giri\u015f valfi tedarik\u00e7isi<\/a>, e\u011fer bir \u015fey ar\u0131yorsan\u0131z manuel \u00e7al\u0131\u015ft\u0131rma giri\u015f valfi \u00fcreticisi<\/a>, l\u00fctfen bizimle ileti\u015fime ge\u00e7mekten \u00e7ekinmeyin.<\/p>\n\n\n\n\n