Gulu lalikulu ndi zikhalidwe zautumiki wa zida zosindikizira ma valve

Kusindikiza ma valve ndi gawo lofunikira la valve yonse, cholinga chake chachikulu ndikuletsa kutayikira,valavuMpando wosindikiza umatchedwanso mphete yosindikiza, ndi bungwe lomwe limalumikizana mwachindunji ndi sing'anga mu payipi ndikuletsa sing'anga kuyenda. Pamene valavu ikugwiritsidwa ntchito, pali zofalitsa zosiyanasiyana mu payipi, monga madzi, gasi, mafuta, zowononga zowonongeka, ndi zina zotero, ndipo zisindikizo za ma valve osiyanasiyana zimagwiritsidwa ntchito m'malo osiyanasiyana ndipo zimatha kusinthasintha zosiyanasiyana.

TWSValvekukukumbutsani kuti zipangizo zosindikizira ma valve zingathe kugawidwa m'magulu awiri, zomwe ndi zitsulo komanso zopanda zitsulo. Zisindikizo zopanda zitsulo nthawi zambiri zimagwiritsidwa ntchito m'mapaipi pa kutentha kwabwino komanso kupanikizika, pamene zosindikizira zachitsulo zimakhala ndi ntchito zambiri ndipo zimatha kugwiritsidwa ntchito pa kutentha kwakukulu. kuthamanga kwambiri.

1. Rabara yopangira

Rabara yopangidwa ndi yabwino kuposa mphira wachilengedwe malinga ndi kukana kwamafuta, kukana kutentha komanso kukana dzimbiri. Nthawi zambiri, kutentha kwa ntchito ya rabara yopangira ndi t≤150°C, mphira wachilengedwe ndi t≤60°C, ndi mphira ntchito kusindikiza mavavu globe, mavavu pachipata, diaphragm mavavu, butterfly mavavu, mavavu cheke, kutsina mavavu ndi mavavu ena ndi mwadzina kuthamanga PN.≤1 MPa pa.

2. Nayiloni

Nayiloni ili ndi mawonekedwe ang'onoang'ono akukangana komanso kukana bwino kwa dzimbiri. Nayiloni imagwiritsidwa ntchito kwambiri ngati mavavu a mpira ndi ma valve padziko lonse lapansi okhala ndi kutentha kwa t≤90°C ndi kuthamanga mwadzina PN≤32 MPA.

3. Polytetrafluoroethylene

PTFE amagwiritsidwa ntchito kwambiri pa mavavu padziko lonse lapansi, mavavu pachipata, mavavu mpira, etc. ndi kutentha t.≤232°C ndi kuthamanga mwadzina PN≤6.4MPa.

4. Chitsulo choponyera

Chitsulo chotayira chimagwiritsidwa ntchito pa mavavu a pachipata, mavavu a globe, mavavu a pulagi, ndi zina zambiri kutentha kwa t≤100°C, kuthamanga mwadzina PN≤1.6MPa, gasi ndi mafuta.

5. Babbitt aloyi

Babbitt aloyi ntchito valavu ammonia padziko lonse kutentha t-70 ~ 150℃ndi kuthamanga mwadzina PN≤2.5MPa.

6. Aloyi yamkuwa

Zomwe zimagwiritsidwa ntchito popanga ma aloyi amkuwa ndi 6-6-3 tin bronze ndi 58-2-2 mkuwa wa manganese. Copper alloy ili ndi kukana kwabwino ndipo ndi yoyenera madzi ndi nthunzi ndi kutentha kwa t≤200℃ndi kuthamanga mwadzina PN≤1.6MPa Nthawi zambiri amagwiritsidwa ntchito mu ma valve a zipata, ma valve a globe, ma cheke ma valve, ma plug ma valve, ndi zina.

7. Chrome chitsulo chosapanga dzimbiri

Makalasi omwe amagwiritsidwa ntchito kwambiri achitsulo chosapanga dzimbiri cha chromium ndi 2Cr13 ndi 3Cr13, omwe azimitsidwa ndikutenthedwa, ndipo ali ndi kukana kwa dzimbiri. Nthawi zambiri amagwiritsidwa ntchito pa mavavu amadzi, nthunzi ndi mafuta amafuta ndi kutentha kwa t≤450℃ndi kuthamanga mwadzina PN≤32 MPA.

8. Chrome-nickel-titaniyamu chitsulo chosapanga dzimbiri

Chitsulo chosapanga dzimbiri cha chromium-nickel-titanium ndi 1Cr18Ni9ti, chomwe chimakhala ndi kukana kwa dzimbiri, kukana kukokoloka komanso kukana kutentha. Ndi yoyenera kwa nthunzi ndi zofalitsa zina zomwe zimakhala ndi kutentha kwa t≤600°C ndi kuthamanga mwadzina PN≤6.4MPa, ndipo imagwiritsidwa ntchito pa mavavu a globe, mavavu a mpira, ndi zina.

9. Nitriding zitsulo

Chitsulo cha nitriding chomwe chimagwiritsidwa ntchito kwambiri ndi 38CrMoAlA, chomwe chimakhala ndi kukana kwa dzimbiri komanso kukana kukanda pambuyo pochiza carburizing. Nthawi zambiri amagwiritsidwa ntchito pamagetsi opangira magetsi omwe ali ndi kutentha kwa t≤540℃ndi kuthamanga mwadzina PN≤10MPa pa.

10. Boronizing

Boronizing imayendetsa mwachindunji malo osindikizira kuchokera ku thupi la valve kapena thupi la disc, ndiyeno imapanga chithandizo cha boronizing pamwamba. Malo osindikizira ali ndi kukana kwabwino kovala. Kwa valavu yophulitsira magetsi pamalo opangira magetsi.

Pamene valve ikugwiritsidwa ntchito, zinthu zomwe ziyenera kutsatiridwa ndi izi:

1. Ntchito yosindikiza ya valve iyenera kuyesedwa kuti iwonetsetse kuti ikugwira ntchito.

2. Yang'anani ngati valavu yosindikizira yatha, ndi kukonza kapena kuisintha molingana ndi momwe zilili.