Yiziphi izinto zokuvala ezivame ukusetshenziswa kuma-valve?

Kunezinhlobo eziningi zamavalvu, kodwa umsebenzi oyisisekelo uyafana, okungukuthi, ukuxhuma noma ukunqamula ukugeleza okuphakathi. Ngakho-ke, inkinga yokuvala ivalvu ivelele kakhulu.

Ukuqinisekisa ukuthi ivalvu inganqamula kahle ukugeleza okuphakathi ngaphandle kokuvuza, kubalulekile ukuqinisekisa ukuthi uphawu lwevalvu luphelele. Kunezizathu eziningi zokuvuza kwevalvu, okuhlanganisa ukwakheka kwesakhiwo okungenangqondo, indawo yokuxhumana yokuvala enephutha, izingxenye zokubopha ezikhululekile, ukulingana okukhululekile phakathi komzimba wevalvu nebhonethi, njll. Zonke lezi zinkinga zingaholela ekuvalekeni okungalungile kwevalvu. Ngakho-ke, ngaleyo ndlela kudala inkinga yokuvuza. Ngakho-ke, ubuchwepheshe bokuvala ivalvu buwubuchwepheshe obubalulekile obuhlobene nokusebenza kahle kwevalvu kanye nekhwalithi, futhi budinga ucwaningo oluhlelekile nolujulile.

Izinto zokuvala ezisetshenziswa kakhulu zama-valve zifaka phakathi lezi zinhlobo ezilandelayo:

1. I-NBR

Ukumelana okuhle kakhulu kwamafutha, ukumelana nokuguguleka okuphezulu, ukumelana nokushisa okuhle, ukunamathela okunamandla. Okubi kwayo ukumelana nokushisa okuphansi, ukumelana ne-ozone okuphansi, izakhiwo zikagesi eziphansi, kanye nokunwebeka okuphansi kancane.

2. I-EPDM

Isici esibaluleke kakhulu se-EPDM ukumelana kwayo okuphezulu kwe-oxidation, ukumelana ne-ozone kanye nokumelana nokugqwala. Njengoba i-EPDM ingeyemndeni we-polyolefin, inezici ezinhle kakhulu ze-vulcanization.

3. I-PTFE

I-PTFE inokumelana okunamandla kwamakhemikhali, ukumelana namafutha amaningi kanye nezinyibilikisi (ngaphandle kwama-ketone nama-ester), ukumelana nesimo sezulu okuhle kanye nokumelana ne-ozone, kodwa ukumelana nokubanda okubi.

4. Insimbi ephothiwe

Qaphela: Insimbi ephothiwe isetshenziselwa amanzi, igesi kanye nemidiya kawoyela enezinga lokushisa elingu-≤100°C kanye nokucindezela okulinganiselwe kwe≤1.6mpa.

5. Ingxubevange esekelwe ku-nickel

Qaphela: Ama-alloy asekelwe ku-nickel asetshenziselwa amapayipi anezinga lokushisa elingu--70~150°I-C kanye ne-PN yokucindezela kobunjiniyela≤20.5mpa.

6. Ingxubevange yethusi

Ingxubevange yethusi inokumelana okuhle nokuguguleka futhi ifanelekela amapayipi amanzi kanye nomusi anezinga lokushisa eliphezulu≤200℃kanye nengcindezi ejwayelekile ye-PN≤1.6mpa.