Transparent & Flat Gauge Glass

Description

DIN 7081 Transparent gauge glass is also named flat gauge glasses and plain gauge glass. Its typical characteristic is two-sided polished and whole body tempered. Transparent gauge glass is made from specific borosilicate glass material types-commonly 4.0 borosilicate glass which results in products characterized by high mechanical strength and high resistance to alkalis, acids and condensates.
The thermal shock resistance of transparent gauge glass is as high as 230 ° C, which makes the transparent gauge glass as an safety observation window with sudden temperature change in the application environment still stable without fragmentation. Transparent gauge glass is an ideal part as level indicators and for visual control of flows in pipes, tanks, and containers.
Transparent gauge glass has higher pressure resistance characteristics than reflex gauge glass, and a mica shield can be installed on the flat inner surface to isolate the alkaline components in the fluid and prevent it from corrosion.
Main Technical Data

Working Conditions	Max Operating Temperature		Max Operating Pressue
	°C	°F	bar	Mpa	psi
Saturated steam or hot water in direct contact with reflex or transparent gauge glass	243	470	35	3.5	500
Saturated steam or hot water in contact with flat gauge glasses protected with mica	320	608	103	10.3	1500
Non-corrosive, non-steam service and no technically significant glass attack, with reflex or transparent gauge glass	38	100	280	28	4000
Transparent gauge glass in contact with medias with no technically significant glass attack	38	100	345	34.5	5000
High pressure transparent gauge glass in special gauges	38	100	414	41.4	6000

Size and Dimentions

Type A
No	L	B	S	Roman No	Size	Part No
0	95	30	17	-	95X30X17	OVFA00
1	115	30	17	I	115X30X17	OVFA01
2	140	30	17	II	140X30X17	OVFA02
3	165	30	17	III	165X30X17	OVFA03
4	190	30	17	IV	190X30X17	OVFA04
5	220	30	17	V	220X30X17	OVFA05
6	250	30	17	VI	250X30X17	OVFA06
7	280	30	17	VII	280X30X17	OVFA07
8	320	30	17	VIII	320X30X17	OVFA08
9	340	30	17	IX	340X30X17	OVFA09
10	370	30	17	X	370X30X17	OVFA10
11	400	30	17	XI	400X30X17	OVFA11
Type B
No	L	B	S*	Roman No	Size	Part No
0	95	34	17	-	95X34X17	OVFB00
1	115	34	17	I	115X34X17	OVFB01
2	140	34	17	II	140X34X17	OVFB02
3	165	34	17	III	165X34X17	OVFB03
4	190	34	17	IV	190X34X17	OVFB04
5	220	34	17	V	220X34X17	OVFB05
6	250	34	17	VI	250X34X17	OVFB06
7	280	34	17	VII	280X34X17	OVFB07
8	320	34	17	VIII	320X34X17	OVFB08
9	340	34	17	IX	340X34X17	OVFB09
10	370	34	17	X	370X34X17	OVFB10
11	400	34	17	XI	400X34X17	OVFB11
* S can be 17.5mm for high pressure purpose, Part No format is OVFB0**X
Type H
No	L	B	S	Roman No	Size	Part No
0	95	34	22	-	95X34X22	OVFH00
1	115	34	22	I	115X34X22	OVFH01
2	140	34	22	II	140X34X22	OVFH02
3	165	34	22	III	165X34X22	OVFH03
4	190	34	22	IV	190X34X22	OVFH04
5	220	34	22	V	220X34X22	OVFH05
6	250	34	22	VI	250X34X22	OVFH06
7	280	34	22	VII	280X34X22	OVFH07
8	320	34	22	VIII	320X34X22	OVFH08
9	340	34	22	IX	340X34X22	OVFH09
10	370	34	22	X	370X34X22	OVFH10
11	400	34	22	XI	400X34X22	OVFH11

*All size unit in mm