Premye a tout, si li se yon valv boul oswa yonValv Papiyon
Premyèman, mekanis estriktirèl la
Sele a difisil nan yon valv boul se yon sele metal-a-metal, ak tou de boul la poze sele ak chèz la yo se metal. Presizyon nan machining ak pwosesis yo relativman difisil, epi li se jeneralman yo itilize nan presyon ki wo, anjeneral plis pase 35MPa. Seals mou yo se sele ant metal ak ki pa metal, tankou nilon PTFE, ak estanda yo fabrikasyon yo se menm bagay la.
Dezyèmman, materyèl la poze sele
Twazyèmman, pwosesis manifakti a
Katriyèm, kondisyon yo nan itilize
Seals mou ka jeneralman rive nan sele segondè, pandan y ap sele difisil yo ka wo oswa ki ba dapre kondisyon; Soft seals need to be fireproof, because at high temperatures, the material of the soft seal will leak, while the hard seal does not have this problem; Sele difisil ka jeneralman dwe fèt ak presyon segondè, men sele mou pa kapab; Akòz pwoblèm nan nan mwayen ap koule tankou dlo a, sele a mou pa ka itilize nan kèk okazyon (tankou kèk medya korozivite); Dènye valv la sele difisil se jeneralman pi chè pase valv la sele mou. As for the manufacturing, there is not much difference between the two, the main thing is the difference between the valve seats, the soft seal is non-metallic, and the hard seal is metal.
Senkyèm, nan seleksyon an nan ekipman yo
The selection of soft and hard seal ball valves is mainly based on the process medium, temperature and pressure, the general medium contains solid particles or has wear or the temperature is higher than 200 degrees, it is good to choose hard seals, the diameter is greater than 50, the valve pressure difference is larger, and the torque of the opening valve is also considered, and the fixed hard seal ball valve should be selected when the torque is larger, regardless of the soft and hard seals, the Nivo sele ka rive nan nivo 6.
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Post tan: Nov-26-2024
