The national standard flangevalavu ya mpiraimatha kuzungulira madigiri 90 ndikutseka mwamphamvu ndi torque yaying'ono. Mitsempha yamkati ya valve ndi yofanana kwathunthu, yomwe imapereka kukana pang'ono ndi njira yowongoka yapakati. Valavu yamtundu wa flanged mpira palokha imakhala ndi mawonekedwe ophatikizika ndipo ndi yosavuta kugwiritsa ntchito ndikusamalira. Mavavu a mpira opangidwa ndi flanged ndi oyenera kugwira ntchito ngati madzi, zosungunulira, ma acid ndi gasi, komanso media omwe amagwirira ntchito movutikira, monga mpweya, hydrogen peroxide, methane, ndi ethylene. Thupi la valve likhoza kuphatikizidwa kapena kuphatikizidwa.

The national standard flangevalavu ya mpirandi yaying'ono m'mapangidwe, yosavuta kugwiritsa ntchito ndi kukonza, yoyenera pazambiri zogwirira ntchito monga madzi, zosungunulira, asidi ndi gasi, ndipo imakhala ndi zovuta zogwirira ntchito (monga hydrogen peroxide), komanso ndi yoyenera pa media. Matupi a valve a mpira monga methane ndi ethylene amatha kuphatikizidwa kapena kuphatikizidwa. Mavavu oterowo amayenera kuyikidwa mopingasa mu payipi.

Ubwino wa national standard flanged mpira valve

1. Kukaniza kwamadzimadzi kumakhala kochepa, ndipo valavu ya mpira wodzaza ndi dzenje ilibe kukana kutuluka.

2. Mapangidwe osavuta, kukula kochepa ndi kulemera kochepa.

3. Pafupi ndi odalirika. Pali malo awiri osindikizira. Apanovalavu ya mpirazinthu zosindikizira pamwamba zimagwiritsidwa ntchito kwambiri m'mapulasitiki osiyanasiyana, ndipo zimakhala ndi ntchito yabwino yosindikiza, yomwe imatha kukwaniritsa kusindikiza kwathunthu. Amagwiritsidwanso ntchito kwambiri pamakina a vacuum.

4. Kuchita bwino, kutsegula mofulumira ndi kutseka, kumangofunika kuzungulira 90 ° kuchokera kutseguka kwathunthu mpaka kutsekedwa kwathunthu, komwe kuli kosavuta kulamulira kutali.

5. Kukonzekera bwino, kapangidwe kosavuta ka valve ya mpira, komanso mphete yosindikizira, yomwe imakhala yosavuta kusokoneza ndikusintha.

6. Mukatsegulidwa kwathunthu kapena kutsekedwa kwathunthu, malo osindikizira a mpira ndi mpando wa valve amasiyanitsidwa ndi sing'anga. Ngakhale sing'anga ikadutsa, malo osindikizira a valve sangawononge.

7. Kuzungulira kwake kumayambira mamilimita angapo mpaka mamita angapo, ndipo imakhala ndi ntchito zambiri, ndipo ingagwiritsidwe ntchito pansi pa vacuum yapamwamba mpaka kupanikizika kwambiri.

8. Chifukwa valavu ya mpira ili ndi makhalidwe opukuta pamene ikutsegula ndi kutseka, ikhoza kugwiritsidwa ntchito pazofalitsa zomwe zimayimitsidwa zolimba.