Ɔkwan bɛn so na wobɛpaw ntontom valve?

Butterfly valve .Selection: Ɔkwan bɛn so na wobɛpaw ntam soft seal ne hard seal?

Wɔ ntontom valve ahorow a wɔpaw mu no, nea wɔpaw wɔ ntontom valve a ɛyɛ mmerɛw a wɔakata so ne ntontom valve a ɛyɛ den a wɔakata so ntam no nya nhyehyɛe no nsɔano adwumayɛ so nkɛntɛnso tẽẽ, nkwa a wɔde di dwuma, ne ɛka a wɔbɔ. Nsonsonoe titiriw a ɛda abien no ntam no da nsɔano nneɛma ne tebea horow a ɛfa ho no mu, a ɛsɛ sɛ wobu atɛn yiye fi afã abiɛsa mu: mfinimfini su, ɔhyew ne nhyɛso, ne mpɛn dodow a wobue ne nea wɔde to mu.

Nsɔano a ɛyɛ mmerɛw a wɔde ahyɛ mu a wɔde ahyɛ mu no .Nwansena valve ahorow .Mpɛn pii no, wɔde rɔba (te sɛ nitrile rɔba, EPDM rɔba) anaa fluoroplastic (te sɛ PTFE) di dwuma, a ɛwɔ mfaso a ɛne sɛ zero leakage sealing ne low opening ne closing torque. Sɛ medium no yɛ dan mu hyew nsu a ɛho tew, gas anaa nsu a ɛyɛ mmerɛw a ɛyɛ mmerɛw (te sɛ efĩ, mframa a ɛma mframa di akɔneaba), na nhyɛso no yɛ ≤ 1.6MPa a, soft sealed butterfly valve no betumi anya bi-directional bubble level sealing ne ne elastic sealing surface, titiriw no ɛfata ma mmere a strict leakage rate ahwehwɛde ahorow a wɔhwehwɛ). Nanso, ɛsɛ sɛ yɛhyɛ no nsow sɛ ɔhyew a ɛwɔ soro a ɛko tia rɔba no taa yɛ 120 °C, na wɔ fluoroplastics fam no ɛyɛ 180 °C. Sɛ ɛboro saa kwan yi so a, ebetumi ama nsɔano no ayɛ den anaasɛ ayɛ mmerɛw, na ɛde nsu a ɛtwetwe no aba.

Hard sealed butterfly valves nya ɔhyew a ɛkorɔn ne nhyɛso a ɛkorɔn a ɛko tia denam dade (te sɛ dade a ɛnyɛ den, aduru a ɛyɛ den) a ɛkɔ dade anaa dade so kosi ceramic sealing pairs so. Wɔ adwumayɛ tebea a ɛyɛ nsu a ɛyɛ hyew, ngo a ɛyɛ hyew, mframa a ɛyɛ hyew kɛse (te sɛ nea ɛboro 300 °C) anaasɛ nsɛm nketenkete (te sɛ nsu a ɛyɛ nsõ, nsõ a ɛyɛ nsõ) no, nsɔe a ɛyɛ den a wɔde akata ntontom valve no so no betumi agyina nea asɛe ne nea ɛreworo so no ano, na ɔsom asetra yɛ nea ɛyɛ nsɔano a ɛyɛ mmerɛw no mpɛn 3-5. Sɛ nhwɛso no, wɔtaa de ntontom valve a ɛyɛ den a wɔde ahyɛ mu abien a ɛyɛ den no di dwuma wɔ nsu a wɔde yɛ aduan a wɔde yɛ aduan mu wɔ anyinam ahoɔden adwumayɛbea. Wɔn eccentric structure no betumi atew friction so wɔ sealing surface no so, bere a ɛkari pɛ wɔ temperature resistance ne opening ne closing flexibility.

Adwene a ɛnteɛ atitiriw abien wɔ hɔ a ɛsɛ sɛ wohu bere a wɔrepaw ade bi no: nea edi kan no, ɛnsɛ sɛ obi de anifurae di nsɔano a ɛyɛ den akyi. Sɛ nneɛma nketenkete a ɛyɛ hyew kɛse biara nni nsu no mu a, ntontom valve a ɛyɛ den a wɔde ahyɛ mu a ɛbue ne ahoɔden kɛse a ɛbue na ɛto mu no bɛyɛ ɔhaw ahorow; Nea ɛto so abien, soft sealed butterfly valves ≠ low pressure rating. Ɛdenam valve nipadua no a ɛyɛ den na ɛhyɛ nsɔano nhyehyɛe no mu den so no, ntontom valve ahorow bi a ɛyɛ mmerɛw a wɔde akata so no betumi agyina nhyɛso a ɛyɛ 2.5MPa ano, nanso ɛsɛ sɛ wɔde nneɛma ho adansedi krataa (te sɛ WRAS, CE) si so dua sɛ nea ɔyɛe no yɛ nea ɔyɛe no.

Awiei: Nsɔano a ɛyɛ mmerɛw .Nwansena valve ahorow .no yɛ nea wɔpɛ ma dan mu hyew a wɔde tew ho, bere a wɔpɛ sɛ wɔde ntontom valve a ɛyɛ den a wɔakata so no ma ɔhyew a ɛyɛ hyew kɛse; Sɛ adwumayɛ tebea no wɔ abien no ntam (te sɛ nsu a ɛyɛ hyew wɔ 150 °C) a, wobetumi asusuw composite butterfly valve a wɔde dade a wɔde hyɛ mu a wɔde dɔte a wɔde dɔte ayɛ anaasɛ wɔde weld a wɔde aduru a ano yɛ den ayɛ no ho no asusuw ho na ama adwumayɛ ne ɛka a wɔbɔ no ayɛ nea ɛkari pɛ.