Vali ya lango inarejelea vali ambayo sehemu yake ya kufunga (lango) husogea kwenye mwelekeo wima wa mstari wa katikati wa chaneli.Valve ya lango hutumiwa hasa kwa kukata kwenye bomba.Valve ya lango la chuma cha kughushi ni vali inayotumika sana.Kwa ujumla hutumiwa kwa kukata vifaa na kipenyo cha DN ≥ 50mm, na wakati mwingine valve ya lango pia hutumiwa kwa kukata vifaa na kipenyo kidogo.Valve ya lango, kama valve ya kiwango cha chini, ni ya kawaida zaidi.
Vipengele vya valve ya lango:
Utendaji mzuri wa kuziba, upinzani mdogo wa maji na utendaji fulani wa udhibiti;Hata hivyo, ina ukubwa mkubwa, muundo tata, usindikaji mgumu, kuvaa rahisi kwa uso wa kuziba, matengenezo magumu na muda mrefu wa kufungua na kufunga.Inafaa kwa kutengeneza valves za kipenyo kikubwa.Mbali na mvuke, mafuta na vyombo vingine vya habari, pia yanafaa kwa vyombo vya habari vilivyo na solidi za punjepunje na viscosity ya juu, pamoja na valves za uingizaji hewa na mifumo ya chini ya utupu.
HAPANA. | SEHEMU | Nyenzo ya ASTM | |||||
WCB | LCB | WC6 | CF8(M) | CF3(M) | |||
1 | MWILI | A216 WCB | A352 LCB | A217 WC6 | A351 CF8(M) | A351 CF3(M) | |
2 | LANGO | A216 WCB+13Cr | A352 LCB+13Cr | A217 WC6 + STL | A351 CF8(M) | A351 CF3(M) | |
3 | KITI | A105+13Cr | A105+13Cr | A217 WC6 + STL | A351 CF8(M)+STL6 | A351 CF3(M)+STL6 | |
4 | STEM | A182 F6 | A182 F6 | A182 F6 | A182 F304/F316 | A182 F304L/F316L | |
5 | BONNET BOLT | A193 B7 | A320 L7 | A193 B16 | A193 B8(M) | A193 B8(M) | |
6 | BONNET NUT | A194 2H | A194 7 | A194 4 | A194 8(M) | A194 8(M) | |
7 | GASKET | SS304+GRAPHITE | PTFE/SS304+GRAPHITE | PTFE/SS316+GRAPHITE | |||
8 | BONNET | A216 WCB | A352 LCB | A217 WC6 | A351 CF8(M) | A351 CF3(M) | |
9 | KITI CHA NYUMA | A182 F6 | A182 F6 | A182 F6 | - | - | |
10 | KUFUNGA | FLEXIBLE GRAPHITE | PTFE/FLEXIBLE GRAPHITE | ||||
11 | GLAND | A182 F6 | A182 F6 | A182 F6 | A182 F304 | A182 F304L/F316L | |
12 | TEZI FLANGE | A216 WCB | A352 LCB | A217 WC6 | A351 CF8(M) | A351 CF3(M) | |
13 | TEZI LA MACHO | A193 B7 | A193 B8 | A193 B8 | |||
14 | NUT | A194 2H | A194 8 | A194 8 | |||
15 | PIN | AISI 1025 | AISI 1025 | ||||
16 | SHINA NUT | SHABA | SHABA | ||||
17 | NATI YA MKONO | AISI 1035 | AISI 1035 | ||||
18 | SCREW | ASTM A36 | ASTM A36 | ||||
19 | MKONO | A536 60-40-18 | A536 60-40-18 | ||||
20 | KUZAA TEZI | AISI 1035 | AISI 1035 | ||||
21 | FUPI YA GIZI | SHABA | SHABA | ||||
22 | NAMEPLATE | SS304 | SS304 |
NPS | 2 | 2½ | 3 | 4 | 5 | 6 | 8 | 10 | 12 | 14 | 16 | 18 | 20 | 24 |
L | 250 | 270 | 280 | 300 | 325 | 350 | 400 | 450 | 500 | 550 | 600 | 650 | 700 | 800 |
D | 165 | 185 | 200 | 235 | 270 | 300 | 360 | 425 | 485 | 555 | 620 | 670 | 730 | 745 |
b | 20 | 22 | 24 | 24 | 26 | 28 | 30 | 32 | 34 | 38 | 40 | 46 | 48 | 58 |
nd | 4-20 | 8-22 | 8-24 | 8-24 | 8-26 | 8-28 | 12-30 | 12-32 | 16-34 | 16-38 | 16-40 | 20-46 | 20-48 | 20-58 |