S\u0131n\u0131rl\u0131 kurulum alan\u0131 durumunda tip se\u00e7imine ili\u015fkin notlar<\/p>\n\n\n\n
S\u00fcrg\u00fcl\u00fc vana, s\u0131z\u0131nt\u0131y\u0131 \u00f6nlemek i\u00e7in ortam\u0131n s\u0131zd\u0131rmazl\u0131k y\u00fczeyine s\u0131k\u0131ca bast\u0131r\u0131lmas\u0131na g\u00fcvenebilir. Ancak makara, koltu\u011fun s\u0131zd\u0131rmazl\u0131k y\u00fczeyini s\u00fcrekli olarak s\u0131y\u0131r\u0131r ve bu da y\u00fczeyi kolayca a\u015f\u0131nd\u0131r\u0131r. A\u015f\u0131nmay\u0131 daha da k\u00f6t\u00fcle\u015ftiren \u015fey, neredeyse kapat\u0131lan s\u00fcrg\u00fcl\u00fc vanan\u0131n olu\u015fturdu\u011fu boru hatt\u0131 i\u00e7indeki fark bas\u0131nc\u0131d\u0131r.<\/p>\n\n\n\n
S\u00fcrg\u00fcl\u00fc vanan\u0131n yap\u0131s\u0131 blok vanaya g\u00f6re daha karma\u015f\u0131k oldu\u011fundan ayn\u0131 kalibredeki g\u00f6r\u00fcn\u00fcm\u00fcne g\u00f6re daha uzun ve uzundur. Ayr\u0131ca, blok vanadan farkl\u0131 olarak s\u00fcrg\u00fcl\u00fc vanan\u0131n hem g\u00f6r\u00fcn\u00fcr hem de gizli g\u00f6vdesi vard\u0131r.<\/p>\n\n\n\n
S\u00fcrg\u00fcl\u00fc vanan\u0131n yaln\u0131zca iki durumu vard\u0131r; yani tam a\u00e7\u0131k ve tam kapal\u0131. Ancak her iki durum da uzun bir vuru\u015fla ileri geri seyahat etmek zaman al\u0131c\u0131d\u0131r. Blok valf kapa\u011f\u0131, ak\u0131\u015f\u0131 kontrol etmek i\u00e7in nispeten k\u0131sa strokunun yar\u0131s\u0131na kadar tutulabilir. S\u00fcrg\u00fcl\u00fc vana yaln\u0131zca kesme i\u00e7in kullan\u0131labilir, ba\u015fka bir i\u015flevi yoktur.<\/p>\n\n\n\n
Yaln\u0131zca a\u00e7\u0131l\u0131p kapat\u0131labilen s\u00fcrg\u00fcl\u00fc vana, ortam\u0131 g\u00f6vde kanal\u0131 i\u00e7inde neredeyse 0 diren\u00e7le \u00e7al\u0131\u015ft\u0131r\u0131r. Bu nedenle, i\u015f g\u00fcc\u00fcnden tasarruf sa\u011flayan bir i\u015flemdir ancak uzaktaki s\u0131zd\u0131rmazl\u0131k y\u00fczeyinin kamaya ula\u015fmas\u0131 zaman gerektirdi\u011finden yine de zaman al\u0131c\u0131d\u0131r.<\/p>\n\n\n\n
Blok vana al\u00e7ak giri\u015fi ve y\u00fcksek \u00e7\u0131k\u0131\u015f\u0131 olan zikzak bir vanad\u0131r. S\u00fcrg\u00fcl\u00fc vana, blok vanan\u0131nkinden daha uzun stroklu yatay bir vanad\u0131r.<\/p>\n\n\n\n
Ak\u0131\u015f direnci a\u00e7\u0131s\u0131ndan s\u00fcrg\u00fcl\u00fc vana, tam a\u00e7\u0131k durumda blok vanadan daha k\u00fc\u00e7\u00fckt\u00fcr. Ortak bir s\u00fcrg\u00fcl\u00fc vanan\u0131n ak\u0131\u015f direnci yakla\u015f\u0131k 0,08 ~ 0,12'dir ve iki ak\u0131\u015f y\u00f6n\u00fc ile emek tasarrufu sa\u011flar. Ortak bir blok vanan\u0131n ak\u0131\u015f direnci katsay\u0131s\u0131, bir s\u0131zd\u0131rmazl\u0131k sa\u011flamak i\u00e7in kuvvetle ba\u011flant\u0131s\u0131 kesilen s\u00fcrg\u00fcl\u00fc vanan\u0131nkinden 3-5 kat daha fazlad\u0131r. Makaran\u0131n s\u0131zd\u0131rmazl\u0131k y\u00fczeyine temas etmesi ancak blok valf tamamen kapan\u0131ncaya kadar ger\u00e7ekle\u015fir ve bu sayede a\u015f\u0131nma en aza indirilir. Akt\u00fcat\u00f6re eklenen blok vana, tork kontrol mekanizmas\u0131n\u0131 y\u00fcksek dirence g\u00f6re ayarlamal\u0131d\u0131r.<\/p>\n\n\n\n
Blok vana iki \u015fekilde monte edilebilir. Bunlardan biri makara alt giri\u015fidir. Avantajlar\u0131, salmastran\u0131n servis \u00f6mr\u00fcn\u00fc uzatmak i\u00e7in salmastra tahliyesinin kapat\u0131lmas\u0131 ve bas\u0131n\u00e7l\u0131 boru hatt\u0131 durumunda de\u011fi\u015ftirilebilir salmastrad\u0131r. Dezavantaj\u0131 ise \u00fcst ak\u0131\u015f\u0131n neredeyse bir kat\u0131 olan b\u00fcy\u00fck tahrik torku ve g\u00f6vdeyi kolayca b\u00fckebilen b\u00fcy\u00fck eksenel kuvvettir.<\/p>\n\n\n\n
Bu nedenle bu y\u00f6ntem yaln\u0131zca k\u00fc\u00e7\u00fck \u00e7apl\u0131 blok vanalara (DN50 a\u015fa\u011f\u0131da) uygulanabilir. DN200 ve \u00fczeri olanlarda montaj \u015fekli makara \u00fcst giri\u015fi olacakt\u0131r. (Elektrikli blok vanalar gibi.) \u00dcst yoldaki eksiklikler alttaki yolun tam tersidir.<\/p>\n\n\n\n
Blok valfin s\u0131zd\u0131rmazl\u0131k y\u00fczeyi makaran\u0131n k\u00fc\u00e7\u00fck trapez taraf\u0131d\u0131r. (Bi\u00e7imi makaran\u0131n \u015fekline ba\u011fl\u0131d\u0131r.) Makara d\u00fc\u015ft\u00fc\u011f\u00fcnde kapanmaya e\u015fittir. (B\u00fcy\u00fck bas\u0131n\u00e7 fark\u0131 durumunda elbette s\u0131zd\u0131rmaz de\u011fildir, ancak tersini tutabilir.) S\u00fcrg\u00fcl\u00fc vana, s\u0131zd\u0131rmazl\u0131\u011f\u0131n sa\u011flanaca\u011f\u0131 kaman\u0131n kenar\u0131na ba\u011fl\u0131d\u0131r. Blok vanadan daha d\u00fc\u015f\u00fck olan s\u0131zd\u0131rmazl\u0131k performans\u0131, vanay\u0131 kapatman\u0131n bir yolu olarak d\u00fc\u015fme makaras\u0131 bulunan blok vanan\u0131nkine benzemez.<\/p>\n\n\n\n\n