JIS Cast Iron Air Vent Head (DN100~DN450)

Category: JIS Marine Valve
Origin: China

Product Overview

DQ Marine supplies marine equipment and technical products for shipyards, vessel operators, offshore projects and industrial buyers worldwide.

Key Specifications

Category	JIS Marine Valve
Model / SKU	jis-cast-iron-air-vent-head-dn100-dn450
Standard	JIS B2220 FF- 5K/10K/16K
Weight / Size	DN50~DN450
Origin	China

Technical Information

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.