Ɔkwan bɛn so na wobɛpaw low temperature environment gate valve?

Nneɛma a wɔpaw no .Gate valve ahorow .Ɛsɛ sɛ wosusuw mmeae a ɛhɔ yɛ hyew a ɛba fam ho yiye fi afã abiɛsa mu: nneɛma a ɛyɛ den, nsɔano adwumayɛ, ne nhyehyɛe ho nhyehyɛe, sɛnea edidi so yi:

Nneɛma a ɛyɛ den: nea ɛyɛ hyew a ɛba fam no mu ade titiriw .

Wɔ mmeae a ɛhɔ yɛ hyew a ɛba fam no, nneɛma taa hwere wɔn den esiane "ɔhyew a ɛba fam a wɔde hyɛ mu" nti, a ɛde apon ano ntini a ɛpaapae ba. Sɛ worepaw a, ɛsɛ sɛ wode nneɛma a ɛwɔ ɔhyew a ɛba fam a ɛyɛ den a eye kyɛn so di kan:

Carbon Steel/Low Alloy Steel: Ɛfata ma mfinimfini ne ɔhyew a ɛba fam tebea horow a efi -20 °C kosi -40 °C, te sɛ 16mndr low-temperature pressure vessel steel, a ɛwɔ impact toughness (AK) a ɛyɛ ≥ 27J wɔ -40 °C, a ebetumi adi mfiridwuma mu ahwehwɛde ahorow nyinaa ho dwuma.

Dadeɛ a ɛnyɛ den: Ɛfata ma deep low temperatures a ɛwɔ ase -196 °C (boiling point of liquid nitrogen), te sɛ 304 stainless steel (a ɛyɛ den a ɛyɛ den wɔ -196 °C) ne 316 stainless steel (eye corrosion resistance, a ɛfata ma nsuo a ɛba fam a ɛba fam a ɛyɛ nsuo a ɛyɛ nwini).

Nickel a egyina alloys, te sɛ Monel Alloy (ni cu alloy) ne inconel nickel alloy (ni cr fe alloy), fata ma ultra-low temperatures (-253 °C, nsu hydrogen adwumayɛ tebea) ne ahoɔden corrosive mmeae, a asiane biara nni hɔ sɛ embrittlement wɔ ɔhyew a ɛba fam.

Nsɔano Adwumayɛ: Guarantee a ɛkyerɛ sɛ zero leakage .

Nsɔano adwumayɛ a ɛwɔ ɔhyew a ɛba fam mu .Gate valve ahorow .Ɛka nhyehyɛe no ahobammɔ tẽẽ, na ɛsɛ sɛ wɔpaw nea wɔde hyɛ mu no sɛnea adwumayɛ tebea te:

Dadeɛ a wɔde hyɛ mu: Dadeɛ a wɔde kɔbere, aluminium, anaa graphite a ɛyɛ mmerɛw akata so, a ɛfata ma nhyɛsoɔ a ɛkorɔn, ɛho tew kɛseɛ, ne ɔhyew a ɛba fam (te sɛ oxygen a ɛyɛ nsuo), a ɛwɔ ahotosoɔ a ɛkorɔn a wɔde hyɛ mu nanso ɛyɛ adwuma pɛpɛɛpɛ a wɔhwehwɛ sɛ wɔyɛ no pɛpɛɛpɛ.

Non metallic sealing: Polytetrafluoroethylene (PTFE, ɔhyew a ɛko tia -200 ~ 260 °C), PTFE a wɔayɛ no foforo a wɔahyɛ no ma (wɔatumi agyina ɔporɔw so kɛse), a ɛfata ma nhyɛso a ɛwɔ mfinimfini ne nea ɛba fam Graphite a ɛyɛ mmerɛw (ɔhyew a ɛko tia -200 ~ 1650 °C), a ɔhyew a ɛba fam ne nea ɛkɔ soro nyinaa, a ɛfata ma ɔhyew a ɛkɔ soro ne nea ɛba fam adwumayɛ tebea horow.

Bellows sealing: Metal bellows (te sɛ 316 stainless steel bellows) betumi anya "zero leakage" na ɛfata ma awuduru kɛse, ogya ne ɔhyew a ɛba fam a wɔde yɛ adwuma (te sɛ nsu chlorine), bere a ɛkwati nkitahodi tẽẽ a ɛda valve dua ne medium no ntam, na ɛtrɛw ɔsom nkwa no mu.

Structural Design: Optimization a wɔde yɛ nsakrae ma ɛne ɔhyew a ɛba fam adwumayɛ tebea hyia .

Ɔhyew a ɛba fam .Gate valve ahorow .Ɛsɛ sɛ wɔtew awɔw a ɛyera so na wɔkwati adwennwen dodow denam structure optimization so:

Kɔn tenten nhyehyɛe: Valve dua no fa kɔn tenten nhyehyɛe (mpɛn pii no ne tenten yɛ 100-300mm), a ebetumi asiw ahoɔden a ɛyɛ nwini a efi valve nipadua no mu kɔ adwumayɛ awiei no ano, asiw wɔn a wɔyɛ adwuma no ano, na ɛtew abɔnten so ɔhyew a wɔde kɔ ɔhyew a ɛba fam so (a ɛkwati mframa a ɛwɔ nsu no mu ne nhyɛso a ɛba so).

Awɔw ano a wosiw ne nea wɔde siw ano: Wobetumi de ade a ɛma mframa bɔ (te sɛ polyurethane foam anaa rock wool) ahyɛ valve nipadua no akyi na ama onwini a ɛyera no so atew; Wɔayɛ apon ano valve ahorow bi a wɔde "ahome ntokuru" ayɛ no sɛnea ɛbɛyɛ a nsu a ɛba fam a ɛyɛ hyew no bɛpae dwoodwoo na akwati awɔw a ɛboaboa ano wɔ valve no dua nsɔano no so.

Anti Water Hammer Design: Valve core ne seat no fa streamlined design a ɛbɛma nsuo hama a ɛnam nsakraeɛ a ɛba mpofirim wɔ medium flow rate so no so ate (Valy nipadua no wɔ impact resistance a ɛyɛ mmerɛw wɔ ɔhyew a ɛba fam mu, na nsuo hama betumi ama rupture).