Yiziphi izinto ezisetshenziswa kakhulu zokuvala ama-valve?

Kunezinhlobo eziningi zama-valve, kodwa umsebenzi oyisisekelo uyafana, okungukuthi, ukuxhuma noma ukusika ukugeleza okuphakathi. Ngakho-ke, inkinga yokuvala i-valve ivelele kakhulu.

Ukuqinisekisa ukuthi i-valve ingakwazi ukusika ukugeleza okuphakathi kahle ngaphandle kokuvuza, kuyadingeka ukuqinisekisa ukuthi uphawu lwe-valve luqinile. Ziningi izizathu zokuvuza kwevalvu, okuhlanganisa ukuklanywa kwesakhiwo okungenangqondo, indawo yokuthintana yokuvalwa enesici, izingxenye ezixegayo ezixegayo, ukuxega okuxekethile phakathi komzimba we-valve nebhonethi, njll. Zonke lezi zinkinga zingase ziholele ekungavaleni kahle kwevalvu. Hhayi-ke, ngaleyo ndlela kudala inkinga yokuvuza. Ngakho-ke, ubuchwepheshe bokuvala ama-valve ubuchwepheshe obubalulekile obuhlobene nokusebenza kwe-valve nekhwalithi, futhi budinga ucwaningo oluhlelekile nolujulile.

Izinto ezisetshenziswa kakhulu zokuvala ama-valve zihlanganisa ikakhulukazi lezi zinhlobo ezilandelayo:

1. I-NBR

Ukumelana nowoyela okuhle kakhulu, ukumelana nokugqoka okuphezulu, ukumelana nokushisa okuhle, ukunamathela okuqinile. Ukungalungi kwayo ukumelana nezinga lokushisa eliphansi eliphansi, ukumelana ne-ozone okubi, izakhiwo zikagesi ezingezinhle, nokunwebeka kancane kancane.

2. EPDM

Isici esibaluleke kakhulu se-EPDM ukumelana kwayo ne-oxidation ephakeme, ukumelana ne-ozone nokumelana nokugqwala. Njengoba i-EPDM ingeyomndeni we-pololefin, inezici ezinhle kakhulu ze-vulcanization.

3. PTFE

I-PTFE inokumelana namakhemikhali okuqinile, ukumelana kuwoyela amaningi nezincibilikizi (ngaphandle kwama-ketone nama-ester), ukumelana nesimo sezulu esihle nokumelana ne-ozone, kodwa ukumelana nokubanda okubi.

4. Insimbi

Qaphela: I-cast iron isetshenziselwa amanzi, igesi kanye nemidiya kawoyela enezinga lokushisa≤100°C kanye nomfutho ophansi we≤1.6mpa.

5. Ingxubevange esekelwe ku-nickel

Qaphela: Ama-alloys asekelwe ku-nickel asetshenziselwa amapayipi anezinga lokushisa elingu-70~150°C kanye nengcindezi yobunjiniyela PN≤20.5mpa.

6. Ingxube yethusi

I-alloy yethusi inokumelana okuhle nokugqokwa futhi ifanele amapayipi amanzi kanye ne-steam anezinga lokushisa≤200℃kanye nengcindezi ye-PN≤1.6mpa.