Musamman hanyoyin sinadarai ruwan da ke cikin bututu galibi masu guba ne, rediyoaktif da haɗari.Bellows hatimin kofa bawulana amfani da su don hana zubar duk wani sinadari mai guba zuwa yanayi.Za a iya zaɓar kayan jiki daga duk kayan da ake da su, ana iya ba da bellow a cikin kayan daban-daban kamar 316Ti, 321, C276 ko Alloy 625.

• 1) Metal bellows hatimi mai motsi kara da kuma kara durability na cushe kara hatimin bawuloli.
• 2) .Bellows saka idanu tashar jiragen ruwa (na zaɓi): Za a iya haɗa wani toshe tare da sararin samaniya a sama da bellows don saka idanu akan aikin.
• 3) . Biyu sakandare kara hatimi: a) Backseat a bude wuri;b) Kundin zane.
• 4).don Bellows hatimi gate bawul, da key aka gyara karfe bellows, ƙananan karshen da bawul kara ne atomatik mirgina welded, da babba karshen da kuma kariya tube ne atomatik yi welded da.An kafa shingen ƙarfe a tsakanin tushe a wurin shiga ta hanyar iyakar matsa lamba da kuma ruwan tsari a cikin bawul, don kawar da zubar da tushe;
• 5) .Bawul ɗin da aka hatimce su yawanci ana gwada su ta amfani da na'urar sikelin jama'a don gano ƙimar ɗigon ruwa a ƙasa da 1x10E-06 std.cc/sec. Ƙirar hatimi na biyu (hatimin bellows da marufi) idan ƙwanƙwasa ta kasa, tattarawar bawul ɗin shima zai kauce wa yabo, da kuma daidai da ƙa'idodin ƙuntatawa na duniya;
• 6) .Bonnets da aka rufe da bellow suna tallafawa tare da daidaitaccen saiti na tattarawar tushe da tashar jiragen ruwa na saka idanu tsakanin ɓangarorin da marufi don hana bala'in sakin ruwa mai haɗari a yayin da ƙwanƙwasa ta tashi.
• 7) Ba kamar yadda na gargajiya man shafawa dunƙule kawai ga kara thread, A man shafawa nono da aka tsara a kan bawul bonnet, za mu iya sa mai da kara, goro da bushing kai tsaye, ta hanyar maiko nono;
• 8) .Ergonomically tsara handwheel, tsawon sabis rayuwa, sauki aiki, mafi aminci kuma mafi abin dogara;