Ma valve otsekaAmadziwikanso kuti ma backflow valves, ma backstop valves, ndi ma backpressure valves.Mitundu ya mavavu amtunduwu imatsegulidwa ndi kutsekedwa ndi mphamvu yomwe imapangidwa ndi kayendedwe ka sing'anga yokha mu payipi, yamtundu wa valve yodziwikiratu.
Chovala chowunikira chiyenera kudalira kuyenda kwa sing'anga yokha ndikutsegula ndi kutseka chitseko cha valve, chomwe chimagwiritsidwa ntchito kuteteza valavu yapakati, yomwe imadziwikanso kuti check valve, valve valve, valve backflow valve, ndi valve backflow valve.Valve yowunikira ndi yamtundu wa valve yodziwikiratu, ntchito yake yayikulu ndikuletsa kubweza kwa media, kuteteza mpope ndikuyendetsa galimoto, komanso kutulutsa media.Ma valve owunikira angagwiritsidwenso ntchito kuti apereke kupanikizika kungathe kukwera kuposa kukakamiza kwa dongosolo lothandizira kuti apereke payipi yoperekera.Valve yowunikira imatha kugawidwa kukhala valavu yoyang'ana (molingana ndi pakati pa kuzungulira kwa mphamvu yokoka) ndi valavu yowunikira (yoyenda motsatira axis).
Choyamba, kugwiritsa ntchito clip-pa check valve check valve yomwe imayikidwa mu makina opangira mapaipi, udindo wake waukulu ndikuletsa kubweza kwa media, valavu yoyang'ana ndi mtundu wa valve yodziwikiratu yodalira kukakamiza kwa media kuti atsegule ndi kutseka.valavu yokhotakhota ndi yoyenera kukakamiza mwadzina PN1.0MPa ~ 42.0MPa, Class150 ~ 25000, m'mimba mwake mwadzina DN15 ~ 1200mm, NPS1/2 ~ 48, kutentha kwapang'onopang'ono -196 ~ 540 ℃ yamapaipi osiyanasiyana, omwe amagwiritsidwa ntchito poletsa kubweza kwa media.Kudzera kusankha zipangizo zosiyanasiyana, angagwiritsidwe ntchito madzi, nthunzi, mafuta, asidi nitric, asidi acetic, amphamvu oxidizing TV ndi uric acid ndi TV zina.
Zida zazikulu za valavu yachitsulo chophwanyika ndi carbon zitsulo, zitsulo zotsika kutentha, zitsulo ziwiri (SS2205 / SS2507), titaniyamu aloyi, aluminium bronze, Inconel, SS304, SS304L, SS316, SS316L, chrome-molybdenum zitsulo, Monel (400 / 400 / 500), 20 # aloyi, Hastelloy ndi zipangizo zina zitsulo.
Chachitatu, miyezo ndi mayendedwe a valve yoyang'ana kavalo
Design: API594, API6D, JB/T89372,
Utali wa nkhope ndi nkhope: API594, API6D,DIN3202,JB/T89373,
Kuthamanga ndi kutentha: ANSI B16.34, DIN2401, GB/T9124, HG20604, HG20625, SH3406, JB/T744,
Mayeso ndi kuyendera muyezo: API598, JB/T90925
Piping Flanges: JB/T74~90,GB/T9112-9124,HG20592~20635,SH3406,ANSI B 16.5,DIN2543-2548,GB/T13402,API605,ASMEB16.47
Chachinayi, mawonekedwe amtundu wa pinch check valve
1.Kutalikirana kwadongosolo, kutalika kwake ndi 1/4 ~ 1/8 yokha ya valve yowunikira ya swing flange.
2. voliyumu yaying'ono, kulemera kwake, kulemera kwake ndi valavu yachikhalidwe ya flange 1/4 ~ 1/2
3. valve flap imatseka mofulumira, kuthamanga kwa nyundo yamadzi kumakhala kochepa
4. Mipope yopingasa kapena yowongoka ingagwiritsidwe ntchito, yosavuta kukhazikitsa
5. Njira yosalala yoyenda, yotsika madzimadzi osasunthika
6.Sensitive action, ntchito yabwino yosindikiza
7.Disc stroke ndi yaifupi, kutseka kwamphamvu kumakhala kochepa
8.Mapangidwe onse ndi ophweka komanso osakanikirana, ndipo mawonekedwe ake ndi okongola
9. Moyo wautali wautumiki ndi ntchito yodalirika
zisanu.Kusindikiza kwa valavu yotchinga yotchinga yotchinga valavu yotsekera yofewa imatha kutulutsa zero, koma valavu yosindikizidwa yolimba kwambiri si valavu yotayikira zero.Ili ndi kutayikira kwina.Malinga ndi kuyendera muyezo wa API598, kwa valavu cheke ndi mpando zitsulo, kwa kukula kwa DN100, madzi kutayikira mlingo pa mphindi ndi 12CC.
