Valve sealing yɛ ade titiriw wɔ valve no nyinaa mu, n’atirimpɔw titiriw ne sɛ ebesiw nsu a ɛtwetwe ano, .valve nowɔsan frɛ sealing seat sealing ring, ɛyɛ ahyehyɛdeɛ a ɛne medium a ɛwɔ pipeline no mu no di nkitaho tẽẽ na ɛmma medium no ntumi nkɔ. Sɛ wɔde valve no redi dwuma a, nneɛma ahorow wɔ nsu afiri no mu, te sɛ nsu, mframa, ngo, nneɛma a ɛporɔw, ne nea ɛkeka ho, na wɔde valve ahorow no nsɔano di dwuma wɔ mmeae ahorow na wotumi dannan nneɛma ahorow.
TWSValvekae wo sɛ wobetumi akyekyɛ nneɛma a wɔde yɛ valve seals no mu abien, a ɛne dade nneɛma ne nneɛma a ɛnyɛ dade. Wɔtaa de nsɔano a ɛnyɛ dade di dwuma wɔ nsu afiri mu wɔ ɔhyew ne nhyɛso a ɛfata mu, bere a dade nsɔano no wɔ nneɛma pii a wɔde di dwuma na wobetumi de adi dwuma wɔ ɔhyew a ɛkɔ soro mu. nhyɛso a ɛkɔ soro.
Rɔba a wɔayɛ no ye sen abɔde mu rɔba wɔ ngo a ɛko tia, ɔhyew a ɛko tia ne nea ɛko tia nsɛe no mu. Mpɛn pii no, ɔhyew a wɔde yɛ adwuma wɔ rɔba a wɔayɛ no mu yɛ t≤ na ɛyɛ150 na ɛwɔ hɔ°C, abɔde mu rɔba ne t≤ na ɛyɛ60°C, na wɔde rɔba di dwuma de kata globe valves, gate valves, diaphragm valves, butterfly valves, check valves, pinch valves ne valves afoforo a ɛwɔ din mu nhyɛso PN≤ na ɛyɛ1MPa na ɛyɛ.
2. Nylon a wɔde yɛ adwuma
Nylon wɔ su ahorow a ɛyɛ friction coefficient ketewaa ne corrosion resistance pa. Nylon na wɔde di dwuma kɛse ma ball valve ne globe valve a ɛwɔ temperature t≤ na ɛyɛ90°C ne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ32MPa na ɛyɛ.
3. Polytetrafluoroethylene a wɔde yɛ aduru a wɔfrɛ no polytetrafluoroethylene
PTFE yɛ nea wɔde di dwuma kɛse ma globe valves, gate valves, ball valves, ne nea ɛkeka ho a ɛwɔ ɔhyew t≤ na ɛyɛ232 na ɛwɔ hɔ°C ne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ6.4MPa na ɛwɔ hɔ.
4. Dade a wɔde gu mu
Cast iron na wɔde yɛ gate valves, globe valves, plug valves, ne nea ɛkeka ho ma ɔhyew t≤ na ɛyɛ100 na ɛwɔ hɔ°C, nhyɛso a wɔfrɛ no PN≤ na ɛyɛ1.6MPa, gas ne ngo.
5. Babbitt aduru a wɔde yɛ nneɛma
Babbitt aduru a wɔde yɛ ammonia globe valve a ɔhyew t-70 ~ 150°Cne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ2.5MPa na ɛwɔ hɔ.
6. Kɔbere a wɔde afrafra
Nneɛma a wɔtaa de yɛ kɔbere a wɔde afrafra ne kɔbere 6-6-3 tin ne 58-2-2 manganese kɔbere. Kɔbere alloy wɔ wear resistance pa na ɛfata ma nsuo ne steam a temperature t≤ na ɛyɛ200 na ɛwɔ hɔ°Cne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ1.6MPa na ɛwɔ hɔ. Wɔtaa de di dwuma wɔ gate valve, globe valve, check valve, plug valve, ne nea ɛkeka ho mu.
7. Chrome dade a ɛnyɛ den
Chromium dade a ɛnyɛ den a wɔtaa de di dwuma ne 2Cr13 ne 3Cr13, a wɔadum na wɔayɛ no hyew, na ɛwɔ ahoɔden a ɛko tia nsɛe yiye. Wɔtaa de di dwuma wɔ valves a nsu, steam ne petroleum a temperature t≤ na ɛyɛ450 na ɛwɔ hɔ°Cne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ32MPa na ɛyɛ.
8. Chrome-nickel-titanium dade a ɛnyɛ den
Chromium-nickel-titanium stainless steel a wɔtaa de di dwuma ne 1Cr18Ni9ti, a ɛwɔ ahoɔden pa a ɛko tia nsɛe, ɛko tia nsuo a ɛtɔ ne ɔhyew a ɛko tia. Ɛfata ma nsuo a ɛyɛ hyew ne nsɛm foforɔ a ɛwɔ ɔhyew t≤ na ɛyɛ600 na ɛwɔ hɔ°C ne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ6.4MPa, na wɔde yɛ globe valve, ball valve, ne nea ɛkeka ho.
9. Nitriding dade a wɔde yɛ nneɛma
Nitriding dadeɛ a wɔtaa de di dwuma ne 38CrMoAlA, a ɛwɔ ahoɔden pa a ɛko tia nsɛeɛ ne scratch resistance wɔ carburizing ayaresa akyi. Wɔtaa de di dwuma wɔ power station gate valves a temperature t≤ na ɛyɛ540 na ɛwɔ hɔ°Cne nhyɛso a wɔfrɛ no PN≤ na ɛyɛ10MPa na ɛyɛ.
10. Boronizing a wɔde yɛ adwuma
Boronizing yɛ sealing surface no ho adwuma tẽẽ fi nneɛma a ɛwɔ valve nipadua anaa disc nipadua no mu, na afei ɛyɛ boronizing surface treatment. Nsɔano no ani wɔ ahoɔden a ɛko tia ɔsɛe. Na anyinam ahoɔden adwumayɛbea blowdown valve.
Sɛ wɔde valve no redi dwuma a, nsɛm a ɛsɛ sɛ wɔhwɛ so ne nea edidi so yi:
1. Ɛsɛ sɛ wɔsɔ sɛnea valve no sealing no yɛ adwuma hwɛ de hwɛ sɛ ɛyɛ adwuma.
2. Hwɛ sɛ valve no sealing surface no asɛe anaa, na siesie anaa sesa no sɛnea tebea no te.
Bere a wɔde bɛkyerɛw: Jan-04-2023
