Ansa na wɔde valve no bɛhyɛ mu no, ɛsɛ sɛ wɔyɛ valve ahoɔden sɔhwɛ ne valve sealing sɔhwɛ no wɔ valve hydraulic test bench no so. Ɛsɛ sɛ wɔhwɛ 20% a ɛwɔ low-pressure valves no mu kwa, na ɛsɛ sɛ wɔhwɛ 100% sɛ ɛnyɛ nea ɛfata a; Ɛsɛ sɛ wɔhwɛ 100% a ɛwɔ medium ne high-pressure valves mu. Nneɛma a wɔtaa de yɛ valve nhyɛsoɔ sɔhwɛ ne nsuo, ngo, mframa, nsuo a ɛyɛ hyew, nitrogen, ne nea ɛkeka ho Akwan a wɔfa so sɔ nhyɛsoɔ hwɛ ma mfiridwuma mu valve a mframa valve ka ho ne deɛ ɛdidi soɔ yi:
Butterfly valve nhyɛso sɔhwɛ kwan
Ahoɔden sɔhwɛ a ɛwɔ mframa mu ntontom valve no mu no ne nea ɛwɔ globe valve no mu no yɛ pɛ. Wɔ sealing performance sɔhwɛ a ɛwɔ butterfly valve no mu no, ɛsɛ sɛ wɔde test medium no fi nsuo a ɛsen no awiei ba, ɛsɛ sɛ wobue butterfly plate no, ɛsɛ sɛ wɔto awiei foforo no mu, na ɛsɛ sɛ injection pressure no du bo a wɔakyerɛ no ho bere a woahwɛ sɛ nsu biara ntu wɔ packing ne nsɔano afoforo no so akyi no, to butterfly plate no mu, bue ano foforo no, na hwɛ butterfly valve no. No leakage wɔ mprɛte nsɔano no fata. Ebia wɔrensɔ butterfly valve a wɔde hwɛ sɛnea ɛsen no nhwɛ sɛ ɛyɛ adwuma wɔ sealing adwuma mu anaa.
Nhyɛso sɔhwɛ kwan a wɔfa so hwɛ valve
Check valve sɔhwɛ tebea: axis a ɛwɔ lift check valve disc no mu wɔ gyinabea a ɛteɛteɛ nea ɛkɔ soro no; swing check valve channel no axis ne disc axis no wɔ gyinabea a ɛbɛyɛ sɛ ɛne horizontal line no hyia.
Wɔ ahoɔden sɔhwɛ no mu no, wɔde sɔhwɛ ade no fi ɔkwan a ɛkɔ mu no mu kɔ bo a wɔakyerɛ no so, na wɔto awiei foforo no mu, na ɛfata sɛ ɛhwɛ sɛ valve nipadua ne valve kataso no nni nsu a ɛretu.
Wɔ nsɔano sɔhwɛ no mu no, wɔde sɔhwɛ ade no fi ɔkwan a wɔfa so fi adi no awiei ba, na wɔhwɛ nsɔano no ani wɔ ɔkwan a wɔfa so hyɛ mu no awiei, na nsu a ɛretu wɔ packing ne gasket no mu no fata.
Nhyɛso sɔhwɛ kwan a wɔfa so yɛ gate valve
Ahoɔden sɔhwɛ a ɛwɔ gate valve no mu no ne nea ɛwɔ globe valve no mu no yɛ pɛ. Akwan abien na ɛwɔ hɔ a wɔfa so sɔ aponkɛse no mu nsu a ɛyɛ den no hwɛ.
1. Ɔde ne nsa kyerɛɛ ne soBue apon no na ama nhyɛso a ɛwɔ valve no mu no akɔ soro akodu bo a wɔakyerɛ no so; afei to apon no mu, yi apon no mu valve no ntɛm ara, hwɛ sɛ nsuo bi wɔ nsɔano a ɛwɔ apon no afã mmienu no so anaa, anaasɛ fa sɔhwɛ afiri no hyɛ plug a ɛwɔ valve no katasoɔ no mu tẽẽ kɔsi boɔ a wɔakyerɛ no , hwɛ nsɔano a ɛwɔ apon no afã mmienu no nyinaa. Wɔfrɛ ɔkwan a ɛwɔ atifi hɔ no sɛ mfinimfini nhyɛso sɔhwɛ. Ɛnsɛ sɛ wɔde saa kwan yi di dwuma de sɔ nsɔano sɔhwɛ wɔ aponkɛseɛ valve a ne kɛseɛ yɛ din mu wɔ DN32mm ase.
2. 2. Nnipa a wɔte saaƆkwan foforo ne sɛ wobebue ɔpon no na ama valve sɔhwɛ nhyɛso no akɔ soro akodu bo a wɔakyerɛ no so; afei to ɔpon no mu, bue anifuraefo mprɛte no ano biako, na hwɛ sɛ ebia nea wɔde akata so no so retu anaa. Afei san w’akyi na san yɛ atifi hɔ sɔhwɛ no kosi sɛ ɛbɛfata.
Wɔbɛyɛ tightness sɔhwɛ a ɛfa packing ne gasket a ɛwɔ pneumatic gate valve no mu ansa na wɔayɛ tightness sɔhwɛ a ɛwɔ gate no mu.
Nhyɛso sɔhwɛ kwan a wɔfa so tew nhyɛso so valve
1. Ɔde ne nsa kyerɛɛ ne soWɔtaa boaboa ahoɔden sɔhwɛ a ɛwɔ nhyɛso so tew valve no ano wɔ ade biako sɔhwɛ no akyi, na wobetumi nso asɔ ahwɛ bere a wɔaboaboa ano akyi. Bere tenten a ahoɔden sɔhwɛ: 1min ma DN <50mm; bɛboro 2min ma DN65～150mm na ɛwɔ hɔ; bɛboro 3min ma DN>150mm.
Sɛ wɔde welded bellows ne nneɛma a ɛwom no wie a, fa nhyɛso a ɛsen biara a ɛwɔ valve a ɛtew nhyɛso so no mu mmɔho 1.5 di dwuma, na fa mframa yɛ ahoɔden sɔhwɛ.
2. 2. Nnipa a wɔte saaWɔbɛyɛ mframa a entumi nkɔ mu sɔhwɛ no sɛnea adwumayɛ kwan ankasa no te. Sɛ wode mframa anaa nsu resɔ ahwɛ a, sɔ nhyɛso a wɔfrɛ no nhyɛso no mmɔho 1.1 hwɛ; sɛ wode nsuonwini resɔ ahwɛ a, fa adwumayɛ nhyɛso a ɛsen biara a wɔma ho kwan wɔ adwumayɛ hyew no ase di dwuma. Nsonsonoeɛ a ɛda nhyɛsoɔ a ɛkɔ mu ne nhyɛsoɔ a ɛfiri mu no ntam no hwehwɛ sɛ ɛnsua nsen 0.2MPa. Ɔkwan a wɔfa so sɔ hwɛ ne sɛ: bere a wɔayɛ nsakrae wɔ nhyɛso a ɛkɔ mu no akyi no, yɛ nsakrae nkakrankakra wɔ valve no skru a ɛsesa no mu, sɛnea ɛbɛyɛ a nhyɛso a ɛkɔ mu no betumi asesa wɔ ɔkwan a ɛyɛ mmerɛw so na akɔ so wɔ dodow a ɛsen biara ne nea ɛba fam koraa no mu, a ɛrentra hɔ anaasɛ ɛrensiw. Wɔ steam pressure reducing valve no fam no, sɛ wɔayɛ nsakrae wɔ inlet pressure no mu akɔ akyirikyiri a, wɔto valve no mu bere a wɔato valve no mu akyi, na outlet pressure no yɛ nea ɛkorɔn ne nea ɛba fam sen biara. Wɔ simma 2 mu no, ɛsɛ sɛ nsuo a ɛfiri mu ba no nhyɛsoɔ a ɛkɔ soro no di ahwehwɛdeɛ a ɛwɔ Table 4.176-22 no so. Bere koro no ara mu no, ɛsɛ sɛ nsuo afiri a ɛwɔ valve no akyi no yɛ The volume conforms to the requirements in Table 4.18 to be qualified; wɔ nsuo ne mframa nhyɛsoɔ so tew valves ho no, sɛ wɔde inlet pressure no asi hɔ na outlet pressure no yɛ zero a, wɔto pressure reducing valve no mu ma tightness test, na leakage biara nni simma 2 mu no fata.
Nhyɛso sɔhwɛ kwan ma globe valve ne throttle valve
Wɔ ahoɔden sɔhwɛ a ɛwɔ globe valve ne throttle valve mu no, wɔtaa de valve a wɔaboaboa ano no gu nhyɛso sɔhwɛ frame no mu, wobue valve disc no, wɔde medium no gu mu ma ɛkɔ soro kodu bo a wɔakyerɛ no, na wɔhwɛ valve nipadua ne valve kataso no mu sɛ fifiri ne nsuo a ɛretu. Wobetumi nso ayɛ ahoɔden sɔhwɛ no wɔ ade biako so. Tightness sɔhwɛ no yɛ shut-off valve no nkutoo. Wɔ sɔhwɛ no mu no, globe valve no valve dua no wɔ tebea a ɛda hɔ gyina hɔ, wobue valve disc no, wɔde medium no fi valve disc no ase awiei ba bo a wɔakyerɛ no so, na wɔhwɛ packing ne gasket no; bere a wɔatwa sɔhwɛ no akyi no, wɔto valve disc no mu, na wobue ano foforo no de hwɛ sɛ ebia nsu bi retu anaa. Sɛ wɔbɛyɛ ahoɔden ne tightness sɔhwɛ a ɛwɔ valve no mu a, wobetumi adi kan ayɛ ahoɔden sɔhwɛ no, afei wɔtew nhyɛso no so kodu bo a wɔakyerɛ wɔ tightness sɔhwɛ no mu, na wɔhwɛ packing ne gasket no; afei wɔto valve disc no mu, na wobue outlet no awiei de hwɛ sɛ ebia sealing no ani retu anaa.
Ball valve nhyɛso sɔhwɛ kwan
Ɛsɛ sɛ wɔyɛ ahoɔden sɔhwɛ a ɛwɔ mframa bɔɔl valve no mu wɔ tebea a bɔɔl valve no abue fã no mu.
1. Ɔde ne nsa kyerɛɛ ne soFloating ball valve sealing test: fa valve no to tebea a ɛbue fã mu, fa test medium no ba awiei biako, na to awiei foforo no mu; dannan bɔɔl no mpɛn pii, bue awiei a wɔato mu no bere a valve no wɔ tebea a wɔato mu no, na hwɛ sɛnea nsɔano no yɛ adwuma wɔ packing ne gasket no bere koro mu. Ɛnsɛ sɛ nsuo a ɛtwetwe nsuo biara ba. Afei wɔde sɔhwɛ afiri no fi awiei foforo no ba na wɔsan yɛ atifi hɔ sɔhwɛ no.
2. 2. Nnipa a wɔte saaSealing test of the fixed ball valve: ansa na sɔhwɛ no, dannan bɔɔl no mpɛn pii a enni adesoa, fixed ball valve no wɔ tebea a wɔato mu, na wɔde test medium no fi awiei biako kɔ bo a wɔakyerɛ no so wɔde nhyɛsoɔ kyerɛwtohɔ hwɛ nnianim no awiei no nsɔano adwumayɛ, na nhyɛsoɔ kyerɛwtohɔ no pɛpɛɛpɛyɛ yɛ 0 .5 kɔsi 1, kwan no yɛ sɔhwɛ nhyɛsoɔ no mmɔho 1.6. Wɔ bere a wɔakyerɛ no mu no, sɛ nhyɛso a ɛba fam adeyɛ biara nni hɔ a, ɛfata; afei fa sɔhwɛ afiri no fi awiei foforo no ba, na san yɛ atifi hɔ sɔhwɛ no. Afei, fa valve no to tebea a ɛbue fã mu, to n’afã abien no nyinaa mu, na fa ade a ɛwɔ mu no hyɛ mu ma. Hwɛ packing ne gasket no wɔ test pressure no ase, na ɛnsɛ sɛ nsuo biara nkɔ mu.
3. Nnipa a wɔte saaWɔbɛsɔ bɔɔl a ɛwɔ akwan abiɛsa no ahwɛ sɛ ɛyɛ den wɔ beae biara.
Bere a wɔde bɛkyerɛw: Mar-02-2022
