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JIS Cast Iron Air Vent Head (DN100~DN450)
Category:
JIS Marine Valve
Certificate:
ABS,LR,BV,DNVGL,NK,KR,IRS,RMRS,CCS
FOB Price:
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Warranty:
12 Months unless specified otherwise
Place of Origin:
China
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JIS Cast Iron Air Vent Head (DN100~DN450):
China JIS Cast Iron Air Vent Head (DN100~DN450):

Air Pipe Head is also called as Air Vent Head or Tank Ventilation Check Valve. It is the ventilation valve of the water tank or oil tank.It makes sure that the tank pressure is not over the design pressure by air exhausting or air suction.If the tank pressure is high, it will exhaust. If the tank pressure is low, it will inhale.The air vent head also can prevent the water,rain,insect,mouse,spark..etc into the tank.

Technical Specification for Air Pipe Head:

Connection: Flange Type

Model No: JIS-KS91A-121

Flange Standard: JIS B2220 FF- 5K/10K/16K

Nominal Size: DN50~DN450

Certificate: CCS

*If for water tank, the protective cover is open type. If for oil tank, the protective cover is semi-closed type.

Material for Air Pipe Head:
S/N Name Material
1 Hex Bolt SUS304/Galv SS
2 Cover SS400 c/w Galv
3 Cushion Graphite
4 Body Cast Iron FC200 / Nodular Iron FCD450
5 Hex Bolt SUS304/Galv SS
6 Rubber Ring NBR
7 Screen SUS304
8 Screen Cover SS400 c/w Galv
9 Float Disc SUS304
10 Hex Bolt SUS304/Galv SS
11 Rubber Cushion NBR
12 Cushion SUS304
13 Guide Bolt SUS304/Galv SS
Main Data of Joining (mm):
DN D2 D3 HT H1 T N-d1 A A3 R
100 165 200 220 160 16 8-19 245 155 250
125 200 235 250 180 16 8-19 270 180 288
150 230 265 285 208 18 8-19 316 216 330
200 280 320 365 269 20 8-23 394 274 432
250 345 385 430 314 22 12-23 485 325 546
300 390 430 530 367 22 12-23 550 384 616
350 435 480 570 415 24 12-23 661 425 714
400 495 540 640 475 24 12-23 703 457 749
450 555 605 713 522 24 12-23 816 510 830

*The flange size in the above list is JIS 5K.


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