ʻI heʻene hoko ko ha tokotaha fakatau valve fakapalofesinale, ʻOku fie maʻu ke ke maʻu ha ʻilo fakaʻauliliki feʻunga ke fai ha ngaahi fili fakatau ʻoku ʻuhinga lelei.
ʻE lava ke vahevahe ʻa e ngaue ʻo e maʻu ʻo e valve ki he ngaahi tafaʻaki ʻe nima ko ʻeni: Ngaue fakatekinikale, talangofua ki he tuʻunga lelei, mapuleʻi ʻo e fakamole, Puleʻi ʻo e Seini ʻo e Kolo, mo hono tokangaʻi kakato ʻo e siakale ʻo e moʻui.

1. Faʻahinga mo e Ngaahi Ngaue ʻa e Valve

1.1 Faʻahinga ʻo e Valve

• Faʻahinga valve: foʻi pulu/matapa ʻo e matapa/taʻofi ʻa e valve/foʻi valve ʻo e kolope, etc.
  ʻUluaki, Kuo pau ke ke fakamahinoʻi ʻa e ngaahi tukunga mo e ngaahi fie maʻu ki hono fakaʻaongaʻi. Ko e tefitoʻi ngaue ʻo e valve ko e tolu pe: fakaava mo tapuni, liliu ʻa e tafe, pea taʻofi ʻa e backflow. Fakatatau ki he ngaahi founga kehekehe ʻo e pipeline, ʻOku fie maʻu ke fili ʻa e ngaahi valves kehekehe.

Hangē ko ʻení, ʻOku feʻunga ʻa e ngaahi valve ki he paipa huhuʻa mo e kasa ʻoku fie maʻu ke fakaava mo tapuni vave; ʻOku feʻunga ʻa e ngaahi valves ʻo e matapa ki he huhuʻa, kasa, mo e ngaahi paipa ʻoku fie maʻu ki ai ʻa e ngaahi tuʻunga ʻo e tafe pea ʻoku ʻikai fie maʻu ke toutou fakaava mo tapuni; pea ʻoku feʻunga ʻa e ngaahi valve vakaiʻi ki he paipa tafe ʻi he hala ʻe taha.
Ko hono fakaʻuhingaʻi ʻo e faʻahinga valve ko e ʻuluaki sitepu ia ki hono fakatau ʻo ha valve.

1.2 Ngaahi Tefitoʻi Fakangatangata ʻo e Valve

• Nominal diameter DN: ʻOku totonu ke tatau ʻa e diameter nominal ʻo e valve mo e paipa; Kapau ʻoku ʻikai tatau ʻa e diameter ʻo e ngaahi konga paipa ʻi muʻa mo mui, ʻoku fie maʻu ke fili ʻa e hokotanga hui ʻo e BUSHING (ko e fehokotakiʻanga ʻo e paipa tefito mo e konga ʻo e paipa vaʻa)
  • DN15-DN25: sivile angamaheni
  • DN125-DN50: Fakaʻaongaʻi angamaheni ʻo e ngaahi ngaueʻanga
  • DN80-DN150: Fakaʻaongaʻi lahi ʻo e ngaahi ngaueʻanga
  • DN200 mo ʻolunga ange: Ngaahi feituʻu lalahi ki hono faitoʻo ʻo e vai

1.3 Founga ʻo e Fehokotakiʻanga ʻo e Valve

• foʻi vaʻa fehokotakiʻanga flange
  Fehokotakiʻanga ʻo e flange ʻAki hono bolting fakataha ʻa e ʻu lauʻi peleti flange ʻe ua ke faʻu ha hokotanga hui kuo silaʻi, feʻunga ki he teke malohi maʻolunga mo e ʻatakai mafana maʻolunga. ʻOku faʻa lava ke matuʻuaki ʻa e malohi maʻolunga (ʻo aʻu ki he 25 MPa pe lahi ange)

• fehokotakiʻanga ʻo e filo
  Fakafehokotaki ʻo e filo Ko hono fakaʻaongaʻi ʻo e fengaueʻaki ʻo e filo ke fakafehokotaki ʻa e ngaahi paipa pe meʻangaue, feʻunga ki he fanga kiʻi paipa iiki mo e teke malohi maʻulalo.
  ʻOku vahevahe ʻa e ngaahi filo ʻo fakatatau ki he ngaahi tuʻunga fakafonua kehekehe ki he: Filo Metric, Filo ʻo e ʻEmipaea, NPT Thread (Filo Paipa Fakafonua), Thread BSP (Paipa Angamaheni Pilitania), Thread JIS (Tuʻunga Ngaueʻanga Siapani), G Thread (Filo Kasa), ACME thread
  ʻOku faʻa feʻunga mo e maʻulalo ki he maʻulalo (ʻo aʻu ki he 16 MPa)

• butt welded fehokotakiʻanga valve
  Butt welded joint ʻaki hono fakatahaʻi mo welding ʻa e ngaahi ngataʻanga ʻo e konga ʻe ua ʻo e paipa ke faʻu ha fehokotakiʻanga malohi, ʻoku faʻa fakaʻaongaʻi ʻi he teke malohi maʻolunga mo e mafana ʻo e ʻea.
  ʻE lava ke matuʻuaki ʻa e teke malohi maʻolunga (ʻo aʻu ki he 50 MPa)

• Clamp fehokotakiʻanga valve
  ʻOku fakafehokotaki ʻe he fehokotakiʻanga clamp ʻa e paipa ʻaki hono fakaʻaongaʻi ʻo e clamp, ʻa ia ʻoku faingofua ke veteki mo tauhi, pea ʻoku lahi hono fakaʻaongaʻi ʻi he meʻakai, faitoʻo, mo e ngaahi ngaueʻanga kehe.
  ʻOku feʻunga fakalukufua mo e teke malohi maʻulalo ki he feʻunga (ʻo aʻu ki he 10 MPa)

ʻE lava ke fili ʻa e founga fetuʻutaki feʻunga ʻo fakatatau ki he tuʻunga ʻo e teke malohi ʻoku fie maʻu.

1.4 Founga Fakaava ʻo e Valve

ʻOku vahevahe ʻa e ngaahi founga fola mo e fakaava ʻo e valve ki he: halaki tohi lesoni, valve ʻuhila, pneumatic valve, hydraulic valve.

• Ko e valve manual ʻa e valve ʻoku lahi taha hono fakaʻaongaʻi ʻi he lolotonga ni, ʻOku ʻi ai ʻa e faʻahinga kau mo e faʻahinga veʻeteka ʻo e vaʻe angamaheni. ʻOku feʻunga mo e lahi taha ʻo e ngaahi polokalama paipa.
• ʻOku feʻunga ʻa e valves ʻuhila ki he ngaahi polokalama puleʻi ʻotometiki hange ko e HVAC, ngaahi laine ngaohi ʻo e kemikale, mo e ngaahi fokotuʻutuʻu ʻo e valve ʻoku fie maʻu ke puleʻi mama
• ʻOku feʻunga ʻa e pneumatic valves ki he ngaahi laine fakatahaʻanga ʻo e fale ngaohiʻanga, nima ʻo e robot, meʻangaue ki hono feʻaveʻaki mo e fana ʻo e kasa
• ʻOku feʻunga ʻa e valve hydraulic ki he ngaahi misini mamafa mo e meʻangaue fakaʻenisinia ʻi he kemikale, Tautahi, mo e ngaahi kautaha vakapuna

2. Ko e Ngaahi Fakangatangata ʻo e Ngaue ʻo e Valve

1. Kalasi ʻo e teke malohi ʻo e valve: PN (teke malohi nominal, hange ko e PN16), Kalasi (Tuʻunga moʻui ʻAmelika, hange ko e Kalasi 150).

Fakaʻilonga: Malohi lahi taha ʻo e ngaue (e.g. PN16=16 pa).

2. Lahi ʻo e mafana ʻo e ngaue ʻa e valve: -50°C~200°C (angamaheni), -196°C~800°C (ngaahi tuʻunga ngaue makehe).

Fakahokohoko Fakamotuʻalea: Matuʻuaki ʻa e mafana ʻo e ʻea ʻo e naunau fakamaʻu (hange ko e EPDM ≤120°C).

3. Coefficient ʻo e tafe ʻa e valve: Mahuʻinga ʻo e Cv/Kv.

4. Kalasi leakage: ANSI Class IV/V/VI, ISO 5208 A/B/C/D.
   Fakaʻilonga: Leakage ʻoku fakangofua (hange ko e Kalasi VI ≤0.1 mL/miniti).
   
5. 5.Fakaava mo hono tapuni ʻo e torque: manual valve ≤50 N·m, valve ʻuhila ≤500 N·m.
   Fakaʻilonga: Fakatauhoa ʻo e drive.

3. Ngaahi fakangatangata ʻo e naunau ʻo e valve

1. Naunau ʻo e valve

• Naunau ʻo e sino: palasa, palanise, ʻikai ke ʻi ai ha ukamea kopa, DZR, Ukamea kaponi (WCB), ukamea stainless (304/316)
  Hangē ko ʻení, Ko e palasa anti-dezincification DZR ko ha faʻahinga naunau ia ʻoku ne matuʻuaki ʻa e corrosion, ʻa ia ʻoku hoko ai ʻa e singiki ko ha fakaʻilonga mahuʻinga.
• Tefito ʻo e naunau:
• Ko e naunau ʻo e foʻi pulu ʻo e foʻi pulu
• Naunau fakamaʻu: PTFE, EPDM, NBR, meʻa fakamaʻu fefeka ukamea.
• Naunau nati

2. Faitoʻo ʻo e fukahi valve: Nickel plating, coating ʻo e epoxy, fana.

ʻOku kau ʻi he ngaahi founga sivi ʻa e: ASTM B117 sivi ʻo e masima ≥48 houa, sivi ʻo e fakafepaki ki he ola ʻo e filimi vali, vali ʻo e lanu mo e sivi ʻo e vanisi.

4. Ngaahi fakangatangata ʻo e fola ʻo e valve

1. Fakahinohino ki hono fola ʻo e valve: horizontal, tuʻu ʻi ʻolunga, tahifo.

Hangē ko ʻení, vakaiʻi e valves ʻoku fokotuʻu hangatonu, pea ʻoku fokotuʻu horizontally ʻa e valves angamaheni.

2. Ngaahi fie maʻu ki he feituʻu ʻoku fie maʻu:

ʻOku ʻi ai foki mo e ngaahi fie maʻu ki he lahi mo e fotunga ʻo e valve

3. Ngaahi fie maʻu ki hono tokangaʻi ʻo e feituʻu:

Taʻofi ʻa e feituʻu ʻoku ngaue ai ʻa e veʻeteka nima/kau, Ko e feituʻu ʻoku ngaue ai ʻa e ngaahi meʻangaue ki hono fola mo toʻo, pea palani ʻa e lahi ʻo e taulanga hu ki ai.

5. Tohi Fakamoʻoni mo e Tuʻunga Moʻui

1. Tohi fakamoʻoni ʻo e koloa:

ISO (Fakavahaʻapuleʻanga), CE/PED (ʻIulope), WRAS(UK), Watermark (ʻAositelelia), FSA (Kānata), API 6D (Pipeline valve), IAPMO (Kautaha fakavahaʻapuleʻanga ʻo e fakapaipa mo e kau ʻofisa fakamisini).

Hangē ko ʻení, ko e ʻIunaiteti Siteiti, Kānata, pea ʻoku maʻu ʻe ʻAositelelia ʻa e ngaahi fie maʻu fefeka taha ki he ngaahi valves ʻoku ʻikai ke ʻi ai ha taki.

2. Ngaahi tuʻunga moʻui ʻo e

a. Ngaahi tuʻunga moʻui ʻo e
API 598: Tuʻunga moʻui ki hono siviʻi ʻo e maʻu ʻo e valves.
API 600: Tuʻunga moʻui ʻo e fokotuʻutuʻu mo e sivi ʻo e matapa valves.
API 607: Tuʻunga moʻui ki hono siviʻi ʻo e vela ʻo e valves.

b. Ngaahi tuʻunga moʻui ʻa e ASME
ASME B16.34: Tuʻunga moʻui ki he palani, faʻu mo hono siviʻi ʻo e valves.
ASME B31.3: Tuʻunga moʻui ki hono fokotuʻutuʻu ʻo e ngaahi paipa kemikale, fekauʻaki mo hono fakaʻaongaʻi ʻo e valves.

c. Ngaahi tuʻunga moʻui ISO
ISO 5208: Tuʻunga moʻui ki hono siviʻi ʻo e maʻu ʻo e valves.
ISO 10497: Tuʻunga moʻui ki hono siviʻi ʻo e vela ʻo e valves.
ISO 9001: Tuʻunga moʻui ʻo e founga puleʻi ʻo e tuʻunga lelei maʻa e ngaahi kautaha.

d. Tuʻunga EN
EN 12266: Tuʻunga moʻui ki hono siviʻi ʻo e tightness ʻo e valves ki he maketi ʻi ʻIulope.
EN 161: Tuʻunga moʻui ʻo e ngaue ki he valves ki hono fakaʻaongaʻi ʻo e kasa.

e. Tuʻunga moʻui ʻa e JIS
JIS B 2002: Tuʻunga moʻui ʻa e kautaha Siapani fekauʻaki mo hono siviʻi mo e ngaue ʻo e valves.

3. Ngaahi fie maʻu ki he fakamatala fakapepa

Ngaahi fakangatangata: Tohi Fakamoʻoni ʻo e Naunau (MTC), lipooti sivi (COC), ta valivali.

Hangē ko ʻení: Founga ke Fakapapauʻi ai ha Tohi Fakamoʻoni WRAS ki he Valves?

6. Ngaahi Fakangatangata Makehe ʻo e Tuʻunga Ngaue

1. Maʻulalo ʻa e mafana ʻo e ʻea (Antifreeze Valve/Frost Proof Valve)

ʻI he ngaahi feituʻu momoko, ʻOku fie maʻu ʻa e antifreeze valves. ʻI hono ʻiloʻi ʻa e mafana ʻo e ʻea, ʻi he taimi ʻoku maʻulalo ange ai ʻa e mafana ʻo e ʻea ʻ 3 ngaahi mataʻitohi, ʻE tukuange ʻa e huhuʻa ʻi he paipa ke taʻofi ʻa e paipa mei he momoko mo e mafahifahi

Ngaahi fakamatala pau: BS 6364 (tuʻunga maʻulalo ʻo e mafana ʻo e valve).

2. High pressure valve

Ko e matolu ʻo e sino ʻo e valve ko e fakangatangata mahuʻinga ia ki he teke malohi ʻo e valve (e.g. DN50 Kalasi 600≈20 mm).

Fakamatala fakaʻuhinga: Talangofua ki he ASME B16.34 (Palani ʻo e valve teke malohi maʻolunga).

3. Sanitary valves

ʻOku fakaʻaongaʻi ʻa e sanitary valves ʻi he ngaahi founga ngaohi ʻo e faitoʻo mo e meʻakai, fakaʻaongaʻi 304 pea mo 316 ukamea stainless.

Ngaahi Fakaʻilonga: Talangofua ki he 3-A Sanitary Standards.

7. Valve Procurement Cost Analysis

1. Totongi ki he fakatau:

mahuʻinga ʻo e ʻiuniti, MOQ (lahi siʻisiʻi taha ʻo e ʻota), Founga ʻo e totongi (LC/TT), ʻOku fakapapauʻi ʻe he fakamole ki he fefonongaʻaki ʻa e fakamole ki hono fakatau fakahangatonu ʻo e valve.

2. Ngaahi fakamole ki hono fakalele:

moʻui ngaue, ngaahi taʻu fakapapauʻi ʻo e tuʻunga lelei, faingataʻa ki hono fola, tuʻo lahi hono tokangaʻi, tokangaʻi, Ngaahi fakamole ki hono fetongi, pea ʻoku kau ʻi he ngaahi fakamole ki hono fakalele ʻo e valves.

3. Fakatuʻutamaki ʻo e seini ʻo e maʻuʻ:

ʻOku fie maʻu ke fakamahinoʻi ʻa e siakale ʻo e ʻoatu ʻa e kautaha hu koloa (angamaheni 6-12 ngaahi uike, fakavaveʻi 4-6 ngaahi uike) mo e founga fefonongaʻaki, pea tuʻutuʻuni ʻa e ngaahi tuʻutuʻuni mo e lahi ʻo e paʻanga ʻa e kautaha hu koloa.

8. Ngaahi fie maʻu ki he tuʻuloa

1. Talangofua ki he ʻatakai

• Ngaahi fakangatangata: RoHS/AʻU KI AI (Fakangatangata ʻo e ngaahi meʻa fakatuʻutamaki), tuʻunga lelei ʻo e ivi.
• Tuʻunga moʻui: ISO 14001 (Founga Puleʻi ʻo e ʻAtakai).

2. Palani maʻulalo ʻo e kaponi

• Ngaahi fakangatangata: Vave hono toe maʻu mai ʻo e naunau (≥90%), maʻamaʻa (15% fakasiʻisiʻi ʻo e mamafa ʻi hono fakafehoanaki ki he palani tukufakaholo).

9. Fakafuofuaʻi ʻo e Kautaha Hu Koloa

1. Ngaahi meʻa fakatekinikale: fakatotoloʻi ʻa e ngaahi meʻa ʻoku malava ʻe he kautaha hu koloa ʻo e OEM/ODM, taukei ʻi he ngaue ki he valve ʻoku ʻikai angamaheni, ngaahi tohi fakamoʻoni patent, ngaahi tohi fakamoʻoni.
2. Malava ke ngaohi: Fakafuofuaʻi ʻa e meʻa ʻoku malava ke ngaohi (output fakaʻaho, output fakamahina) mo e ngaahi ʻota lolotonga ʻo fakatatau ki he lahi ʻo e fale ngaue, Ko e lahi ʻo e ngaahi meʻangaue, mo e tokolahi ʻo e kau ngaue, pea fakafuofuaʻi pe ʻe lava ke ʻave taimi totonu hoʻo ngaahi ʻota kapau te ke ngaue fakataha.
3. Malava ke mapuleʻi ʻa e tuʻunga lelei: Ko e ha ʻa e meʻangaue sivi tuʻunga lelei ʻoku maʻu ʻe he kautaha hu koloa (meʻangaue ki hono siviʻi ʻo e teke, meʻangaue ki hono siviʻi ʻo e tafe, Leak detector, ultrasonic flaw detector).
4. Ako mei he meʻa ke ako mei ai: Fakatotoloʻi pe kuo fakahoko ʻe he ngaahi kautaha hu koloa ʻa e ngaahi ʻota ki he ngaahi koloa tatau ʻoku lahi tatau. Kapau ʻoku ʻikai haʻo taukei, ʻOku fie maʻu ke ke tokanga lahi ange ʻi he fengaueʻaki ke fakapapauʻi ʻoku mahino ki he ongo tafaʻaki fakatouʻosi ʻa e fakaikiiki kotoa pe ʻo e ngaahi fie maʻu ʻo e koloa ʻo e ʻota.
5. Malava ʻo e ngaue tokoni hili ʻa e fakatau: Vahaʻataimi maluʻi ʻo e koloa (angamaheni 2-5 ngaahi taʻu) ʻE lava ke fakapapauʻi ʻe he ngaahi kautaha tuʻuaki tuʻunga lelei ʻa 10 ngaahi taʻu.
6. Ngaahi fie maʻu ki hono kofukofu: Pe ʻoku feau ʻe he kofukofu ʻo e koloa ʻa e ngaahi fie maʻu ki he fefonongaʻaki mamaʻo, hange ko e ngaahi puha uta mo e pallets
7. Sivi ʻo e sipinga: fie maʻu ke fakapapauʻi pe ʻoku aʻusia ʻe he ngaahi sipinga ʻoku ʻomi ʻe he kautaha hu koloa ʻa e ngaahi fie maʻu ʻo e naunau, lahi, teke malohi, fotunga, etc. Hokohoko atu hoʻo fetuʻutaki mo e kautaha hu koloa mai kapau ʻoku fie maʻu ke fai ha ngaahi liliu hili hono siviʻi

Foomu fakafuofuaʻi ʻo e ngaahi kautaha hu koloa

ʻI hono fakafuofuaʻi kimuʻa ʻo e kautaha hu koloa, te ke lava ʻo fakafuofuaʻi ʻa e ngaahi kautaha hu koloa, Fakafaʻahinga ʻo ha ngaahi kautaha hu koloa lahi ange ʻo e faʻahinga tatau, pea fili ʻa e ngaahi kautaha hu koloa lelei taha.

Tender project pe fakafuofuaʻi ʻo e mahuʻinga ʻo e ngaahi kautaha hu koloa

ʻI he taimi ʻoku fai ai ha ʻota ʻi ha vahaʻataimi kimui ange, ʻi he taimi ʻoku fehangahangai ai mo ha ngaahi kautaha tuʻuaki koloa tuʻunga maʻolunga, ʻOku faingataʻa ke fili, Te ke lava foki ʻo fakafuofuaʻi quantitatively ʻa e malava ʻa e ngaahi kautaha hu koloa ʻo fakatatau ki he ngaahi fakaʻilonga kehekehe, pea fikaʻi ʻa e ngaahi kautaha hu mai ʻa e valve feʻunga taha maʻau.

Ko ha laʻipepa fakafuofuaʻi ʻeni maʻa e BMAG mei heʻetau kau kasitomaa.

Ko e fakamatala kotoa ʻeni ʻi ʻolunga ʻoku totonu ke ʻilo ʻe ha palofesinale ʻoku fakatau ʻaki ʻa e valve.
Fakatatau ki he ngaahi meʻa ʻi ʻolunga, ʻE lava ke tokoni kakato hono fakahoko ʻo e fakafuofuaʻi ʻo e koloa ki he koloa foʻou ke ne hoko ko ha mataotao ʻi he fakatau.

BMAG ko ha hoa falalaʻanga mo e 20 ngaahi taʻu ʻo e taukei ʻi hono ngaohi ʻo e valve tuʻunga maʻolunga, ʻoku tukupa ke fakahoko ʻa e lelei taha.