{"id":1509,"date":"2025-11-08T12:12:29","date_gmt":"2025-11-08T12:12:29","guid":{"rendered":"https:\/\/www.tgvalve.com\/?p=1509"},"modified":"2025-11-09T12:12:50","modified_gmt":"2025-11-09T12:12:50","slug":"valve-pressure-temperature-ratings-explained","status":"publish","type":"post","link":"https:\/\/www.tgvalve.com\/tr\/blog\/valve-pressure-temperature-ratings-explained\/","title":{"rendered":"End\u00fcstriyel Vanalar i\u00e7in S\u0131cakl\u0131k ve Bas\u0131n\u00e7 De\u011ferleri A\u00e7\u0131kland\u0131"},"content":{"rendered":"

S\u0131cakl\u0131k ve bas\u0131n\u00e7 derecelendirmeleri, g\u00fcvenli \u00e7al\u0131\u015fma s\u0131n\u0131rlar\u0131n\u0131 tan\u0131mlar. end\u00fcstriyel vanalar<\/a>S\u0131cakl\u0131k derecesi, minimum ve maksimum \u00e7al\u0131\u015fma s\u0131cakl\u0131klar\u0131n\u0131 belirtir. Bas\u0131n\u00e7 derecesi, belirli bir s\u0131cakl\u0131ktaki maksimum bas\u0131nc\u0131 g\u00f6sterir. Bu dereceler aras\u0131nda ters bir ili\u015fki vard\u0131r: s\u0131cakl\u0131k artt\u0131k\u00e7a, izin verilen bas\u0131n\u00e7 d\u00fc\u015fer.<\/p>\n\n\n\n

Bir Vanan\u0131n Bas\u0131n\u00e7 De\u011feri Nedir?<\/h2>\n\n\n\n

Bir valf bas\u0131n\u00e7 de\u011feri, valfin belirli bir s\u0131cakl\u0131kta dayanabilece\u011fi maksimum izin verilen \u00e7al\u0131\u015fma bas\u0131nc\u0131n\u0131 (MAWP) tan\u0131mlar. Bu de\u011fer, \u00e7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131na ve valf malzemesine g\u00f6re de\u011fi\u015fir. Ortam s\u0131cakl\u0131\u011f\u0131nda 285 PSI bas\u0131n\u00e7 de\u011ferine sahip bir valf, 250\u00b0C'de yaln\u0131zca 150 PSI bas\u0131nca dayanabilir. <\/p>\n\n\n\n

Valf bas\u0131n\u00e7 derecesi her zaman s\u0131cakl\u0131\u011fa ba\u011fl\u0131d\u0131r \u00e7\u00fcnk\u00fc \u0131s\u0131 artt\u0131k\u00e7a malzeme mukavemeti azal\u0131r. Bu dereceler a\u015fa\u011f\u0131daki gibidir: ASME B16.34 gibi standartlar<\/a> Kuzey Amerika vanalar\u0131 i\u00e7in ve Avrupa vanalar\u0131 i\u00e7in EN 1092.<\/p>\n\n\n\n

Vana S\u0131n\u0131f\u0131 300 Bas\u0131n\u00e7 Derecesini ve Di\u011fer Standartlar\u0131 Anlama<\/h2>\n\n\n\n

\u0130\u015fte farkl\u0131 vana s\u0131n\u0131f\u0131 derecelendirmeleri ve a\u00e7\u0131klamalar\u0131:<\/p>\n\n\n\n

ANSI S\u0131n\u0131f Derecelendirmeleri<\/h3>\n\n\n\n

ANSI S\u0131n\u0131f derecelendirmeleri, Kuzey Amerika'daki birincil bas\u0131n\u00e7 s\u0131n\u0131fland\u0131rma sistemidir. Yayg\u0131n s\u0131n\u0131flar aras\u0131nda 150, 300, 600, 900, 1500 ve 2500 bulunur. 300 s\u0131n\u0131f\u0131 valf bas\u0131n\u00e7 derecesi, 300 PSI anlam\u0131na gelmez. ASME B16.34'teki bas\u0131n\u00e7-s\u0131cakl\u0131k \u00e7izelgelerine at\u0131fta bulunur. 300 S\u0131n\u0131f\u0131 karbon \u00e7elik vana<\/a> Ortam s\u0131cakl\u0131\u011f\u0131nda yakla\u015f\u0131k 740 PSI'ye kadar bas\u0131n\u00e7lara dayanabilirken, 400\u00b0C'de yaln\u0131zca 450 PSI'ye kadar bas\u0131n\u00e7lara dayanabilir.<\/p>\n\n\n\n

PN Derecelendirmeleri<\/h3>\n\n\n\n

PN (Nominal Bas\u0131n\u00e7) de\u011ferleri Avrupa standartlar\u0131nda yayg\u0131nd\u0131r. Bu say\u0131lar, 20\u00b0C'de izin verilen maksimum bas\u0131nc\u0131 bar cinsinden g\u00f6sterir. PN 50, vanan\u0131n referans s\u0131cakl\u0131\u011f\u0131nda 50 bar'\u0131 kald\u0131rabilece\u011fi anlam\u0131na gelir.<\/p>\n\n\n\n

WOG Derecelendirmeleri<\/h3>\n\n\n\n

WOG (Su, Petrol, Gaz) de\u011ferleri, genellikle -29\u00b0C ile 38\u00b0C aras\u0131ndaki ortam s\u0131cakl\u0131klar\u0131nda maksimum bas\u0131nc\u0131 belirtir. 600 WOG'luk bir vana, oda s\u0131cakl\u0131\u011f\u0131nda 600 PSI'yi idare eder.<\/p>\n\n\n\n

PN Derecelendirmesi<\/strong><\/td>ANSI S\u0131n\u0131f\u0131<\/strong><\/td>Ortam S\u0131cakl\u0131\u011f\u0131nda Yakla\u015f\u0131k PSI<\/strong><\/td><\/tr><\/thead>
PN 20<\/td>S\u0131n\u0131f 150<\/td>285 PSI<\/td><\/tr>
PN 50<\/td>S\u0131n\u0131f 300<\/td>740 PSI<\/td><\/tr>
PN 100<\/td>S\u0131n\u0131f 600<\/td>1480 PSI<\/td><\/tr>
PN 150<\/td>S\u0131n\u0131f 900<\/td>2220 PSI<\/td><\/tr>
PN 250<\/td>S\u0131n\u0131f 1500<\/td>3705 PSI<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

Vanalarda Bas\u0131n\u00e7-S\u0131cakl\u0131k \u0130li\u015fkisi<\/h2>\n\n\n\n
\n

Vanalar\u0131n bas\u0131n\u00e7 de\u011ferleri, s\u0131cakl\u0131kla ters orant\u0131l\u0131d\u0131r. \u00c7al\u0131\u015fma s\u0131cakl\u0131\u011f\u0131 artt\u0131k\u00e7a, malzemeler \u0131s\u0131t\u0131ld\u0131\u011f\u0131nda mekanik dayan\u0131mlar\u0131n\u0131 kaybettikleri i\u00e7in izin verilen maksimum bas\u0131n\u00e7 d\u00fc\u015fer. 38\u00b0C'de 285 PSI bas\u0131n\u00e7 de\u011ferine sahip S\u0131n\u0131f 150 karbon \u00e7eli\u011finden bir vana, 260\u00b0C'de yakla\u015f\u0131k 75 PSI'ya d\u00fc\u015fer.<\/p>\n<\/div>\n\n\n\n

Bu ili\u015fki, her vana malzemesi ve s\u0131n\u0131f\u0131na \u00f6zg\u00fc bas\u0131n\u00e7-s\u0131cakl\u0131k (PT) tablolar\u0131na ba\u015fvurulmas\u0131n\u0131 gerektirir. Ortam s\u0131cakl\u0131\u011f\u0131 de\u011ferini y\u00fcksek s\u0131cakl\u0131klarda uygulayamazs\u0131n\u0131z. M\u00fchendisler, maksimum sistem s\u0131cakl\u0131\u011f\u0131nda g\u00fcvenli \u00e7al\u0131\u015fma bas\u0131nc\u0131n\u0131 belirlemek i\u00e7in vana g\u00f6vdesi malzemesinin tam PT tablosuna ba\u015fvurmal\u0131d\u0131r.<\/p>\n\n\n\n

CTGV, ANSI, API ve DIN bas\u0131n\u00e7 de\u011ferlerine uygunlu\u011fu sa\u011flamak i\u00e7in t\u00fcm vanalar\u0131 sim\u00fcle edilmi\u015f y\u00fcksek bas\u0131n\u00e7 ve s\u0131cakl\u0131k ortamlar\u0131nda test eder.<\/p>\n\n\n\n