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TFA72W真空負(fù)壓安全閥是一種安全保護(hù)用閥，它的啟閉件受外力作用下處于常閉狀態(tài)，當(dāng)設(shè)備或管道內(nèi)的介質(zhì)壓力升高，超過規(guī)定值時(shí)自動(dòng)開啟，通過向系統(tǒng)外排放介質(zhì)來防止管道或設(shè)備內(nèi)介質(zhì)壓力超過規(guī)定數(shù)值。安全閥屬于自動(dòng)閥類，主要用于鍋爐、壓力容器和管道上，控制壓力不超過規(guī)定值，對(duì)人身安全和設(shè)備運(yùn)行起重要保護(hù)作用。

TFA72W-10P/10R
TFA72W適用于溫度≤200℃的負(fù)壓系統(tǒng)，當(dāng)容器內(nèi)負(fù)壓超過允許值時(shí)，該閥自動(dòng)開啟，吸入空氣； 當(dāng)容器內(nèi)負(fù)壓達(dá)到允許值時(shí)，該閥自動(dòng)關(guān)閉，從而保護(hù)設(shè)備及系統(tǒng)。安裝在正常非負(fù)壓系統(tǒng)，當(dāng)容器和系統(tǒng)的放散閥未打開，產(chǎn)生負(fù)壓時(shí)，此閥自動(dòng)開啟。
tive pressure system with temperature 200 . When the netative pressure in the container exceeds the allowable value, the valve will open automatically and absorbs air When the netative pressure in the container  reaches the allowable value, the valve will  close automatically so as to protect  the equipment  and the system. It  is to be installed in normal  non-negative pressure systems. When the discharge valve of  the container  and system has not opened,  which produces the negative pressure, this valve will open TFA72W is applicable in nega-automatically.
主要性能規(guī)范
NO.	Name of part	TFA72W-P Materials	TFA72W-R Materials
1	Body	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
2	Seat	1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
3	Adjusting ring	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
4	Bonnet	ZG1Cr18Ni9Ti	1Cr18Ni9Ti
5	Stem	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
6	Spring	50CrVA	50CrVA  Coated Teflon