Bir s\u00fcrg\u00fcl\u00fc vana, anahtar cihaz\u0131n\u0131n (kap\u0131) merkezi yol boyunca dikey bir hareket yolunda oldu\u011fu bir vanay\u0131 ifade eder. Esas olarak boru hatt\u0131ndaki medyay\u0131 kesmek i\u00e7in kullan\u0131l\u0131r.<\/p>\n\n\n\n
S\u00fcrg\u00fcl\u00fc vana, DN \u226550mm'lik genel kesme cihazlar\u0131ndan bazen minyat\u00fcr olanlara kadar geni\u015f bir uygulama aral\u0131\u011f\u0131na sahiptir. <\/p>\n\n\n\n
\u0130\u015fte avantajlar\u0131n\u0131n bir listesi.<\/p>\n\n\n\n
Ancak eksiklikleri var.<\/p>\n\n\n\n
Paralel s\u00fcrg\u00fcl\u00fc vanalar aras\u0131nda, iki kap\u0131 aras\u0131na \u00e7ift tarafl\u0131 bir itme kamas\u0131 tak\u0131l\u0131 olan itme kama valfi en yayg\u0131n olan\u0131d\u0131r. DN 40-300mm'lik d\u00fc\u015f\u00fck bas\u0131n\u00e7l\u0131 ortamlar ve kesme cihazlar\u0131 i\u00e7indir. Baz\u0131 paralel s\u00fcrg\u00fcl\u00fc vanalarda iki kap\u0131 aras\u0131nda bir yay bulunur, dolay\u0131s\u0131yla kap\u0131n\u0131n daha iyi s\u0131zd\u0131rmazl\u0131\u011f\u0131n\u0131 sa\u011flamak i\u00e7in bir s\u0131kma kuvveti uygulan\u0131r.<\/p>\n\n\n\n
Esas olarak ortam s\u0131cakl\u0131\u011f\u0131na ba\u011fl\u0131 olarak, s\u0131zd\u0131rmazl\u0131k y\u00fczeyinin a\u00e7\u0131s\u0131 genellikle 2\u00b052', 3\u00b030',5\u00b0, 8\u00b0 ve 10\u00b0'dir. \u00c7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 ne kadar y\u00fcksek olursa, s\u0131k\u0131\u015fma olas\u0131l\u0131\u011f\u0131n\u0131 azaltmak i\u00e7in a\u00e7\u0131 da o kadar b\u00fcy\u00fck olur.<\/p>\n\n\n\n
Kama s\u00fcrg\u00fcl\u00fc vana ayr\u0131ca tek kap\u0131l\u0131, \u00e7ift kap\u0131l\u0131 ve elastik kap\u0131l\u0131 olanlara b\u00f6l\u00fcnebilir. Tek kap\u0131l\u0131 kama s\u00fcrg\u00fcl\u00fc vana basit yap\u0131l\u0131 ve g\u00fcvenilirdir ancak y\u00fcksek do\u011fru a\u00e7\u0131s\u0131, i\u015fleme ve bak\u0131m\u0131 zorla\u015ft\u0131r\u0131r. Bu arada s\u0131cakl\u0131\u011f\u0131n de\u011fi\u015fmesi durumunda tak\u0131lma ihtimali de vard\u0131r. \u00c7ift kap\u0131l\u0131 kama s\u00fcrg\u00fcl\u00fc vana, su ve buhar boru hatlar\u0131nda yayg\u0131n olarak kullan\u0131lmaktad\u0131r. Avantajlar\u0131 aras\u0131nda a\u00e7\u0131 do\u011frulu\u011funa ili\u015fkin d\u00fc\u015f\u00fck gereksinimler, de\u011fi\u015fken s\u0131cakl\u0131klara dayan\u0131kl\u0131l\u0131k ve a\u015f\u0131nm\u0131\u015f s\u0131zd\u0131rmazl\u0131k y\u00fczeyi i\u00e7in ilave contalar say\u0131labilir. Ancak \u00e7ok fazla par\u00e7as\u0131 vard\u0131r ve viskoz ortamda s\u0131k\u0131\u015f\u0131p kalma e\u011filimi g\u00f6sterir, bu da s\u0131z\u0131nt\u0131ya neden olabilir. En \u00f6nemli kusuru, \u00fcst ve alt b\u00f6lmelerin paslanmaya yatk\u0131n olmas\u0131 ve dolay\u0131s\u0131yla kap\u0131n\u0131n d\u00fc\u015fmesine neden olmas\u0131d\u0131r. Tek kap\u0131l\u0131 olan\u0131n benzer basit yap\u0131s\u0131yla avantajl\u0131 olan elastik kap\u0131l\u0131 kama s\u00fcrg\u00fcl\u00fc vana, a\u00e7\u0131 i\u015flemedeki sapmay\u0131 telafi etmek i\u00e7in elastik olarak deforme edilebilir. Bu nedenle kitlesel olarak benimsenmi\u015ftir.<\/p>\n\n\n\n
\u00c7ap, g\u00f6vde kanal\u0131n\u0131n herhangi bir yerinde farkl\u0131d\u0131r (\u00e7o\u011funlukla, oturma yerinin boyutunun flan\u015f ba\u011flant\u0131s\u0131ndan daha k\u00fc\u00e7\u00fck olmas\u0131 durumudur), bu durum \u00e7ap b\u00fcz\u00fclmesi olarak bilinir.<\/p>\n\n\n\n
B\u00fcz\u00fclme, par\u00e7alar\u0131n boyutunu k\u00fc\u00e7\u00fcltebilir, uygulama aral\u0131\u011f\u0131n\u0131 geni\u015fletebilir ve a\u00e7ma-kapama i\u00e7in gereken \u00e7abay\u0131 azaltabilir. \u00d6te yandan yol daralarak s\u0131v\u0131 direnci kayb\u0131n\u0131n artmas\u0131na neden olur.<\/p>\n\n\n\n
Belirli \u00e7al\u0131\u015fma ko\u015fullar\u0131nda (petrol boru hatt\u0131 gibi), boru hatt\u0131n\u0131n diren\u00e7 kayb\u0131n\u0131 azaltmak ve mekanik temizleme i\u015flemini kolayla\u015ft\u0131rmak i\u00e7in b\u00fcz\u00fclmeli s\u00fcrg\u00fcl\u00fc vanalar reddedilir.<\/p>\n\n\n\n\n