Small Size JIS Cast Iron Air Pipe Head:
China Small Size JIS Cast Iron Air Pipe Head:
Air Pipe Head is also called as Air Vent Head or Tank Air Check Valve for the water tank or oil tank.It keeps the tank pressure not over the design pressure by air exhausting or air suction.The air vent head also can prevent the water,rain,insect,mouse,spark..etc into the tank.
Technical Specification for JIS Small Size Air Pipe Head:
Connection: Flange Type
Model No: JIS-KS91A-121
Flange Standard: JIS B2220 FF- 5K/10K/16K
Nominal Size: DN50~DN80
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 for Joining(mm):
| DN | D2 | D3 | HT | H1 | T | N | d1 |
| 50 | 105 | 130 | 175 | 127 | 14 | 4 | 15 |
| 65 | 130 | 155 | 204 | 164 | 14 | 4 | 15 |
| 80 | 145 | 180 | 244 | 176 | 14 | 4 | 15 |
Note: The flange size in the above list is based on JIS 5K.
