Origin	China
Brand Name	bright pearl

Level Gauge glass

1.   Element of Level Gauge glass

Chemical element (%)	SiO2	Al2O3	B2O3	Na2O+K2O
	80.00	2.8	12.8	3.8

2. Main property

Item	Data.
Water-resistance	< 0.5mg/cm2
Alkali-resistance	< 80mg/cm2
Acid-resistance	< 0.5mg/cm2
Temperature-resistance impacts capability	260��/span>
Bend-resistance	≥80MPa
Transmittance	≥90%

3. Level Gauge Glass Physical Property(Detailed)

1. Appearance

1)  Air bubble

The air bubble of Diameter≤0.5mm, in the 10mm x 10mm area, the quantity must be ≤3.

The air bubble of Diameter from 0.5mm to 1.5mm, dispersive air bubble,

there is less 2 on the sight plane and less 5 on the No-sight plane.

Their distance must be ç«ÂŠ�/span>40mm.

The air bubble of Diameter from 1.5mm to 2mm ≤3.

On the No-sight plane, their distance must be ç«ÂŠ�/span>40mm.

On the sight plane, the distance to the side in 7.5mm,

The air bubble of the diameterç«ÂŠ�/span>1mm mustn’t be more 2.

2) The glass don’t allow slag and scrap iron, etc. impurity.

3) Stripe

Don’t allow have palpable filaceous and pectinate stripe on the sight plane.

4) Cockle

In the side face, don’t allow have the cockle of depthç«ÂŠ�/span>1mm.

5) Crack

Don’t allow have crack.

6) Scrape

On the sight plane and in the 7.5mm to edge, the scrape of less than 10mm don’t allow more 2 strips.

7) The sight plane must be polishing, and sealing side must be rubbing and polishing.

2. Color and Luster

It should be no color and transparentç«ÂŠ�/span>and with its self tine green is allowed.

3. Water-resistance

Cooked in the water for 5 hours, then weigh up, then titration with 25ml 0~31ug/g

4. Alkali-resistance

Cooked in the 0.5N NaOH for 3 hoursç«ÂŠ�/span>then Weigh upç«ÂŠ�/span>weightlessness should be ≤75mg/dm².

5. Temperature-resistance impacts capability

Put it into electric cooker, keep for 7min under the temperature of 260��/span>±1��/span>, then, put into the water of 20±1��/span>ç«ÂŠ�/span>it should not crack

6. Bend-resistance≥80MPa

Catalog:

1. Three tendons (four grooves)

340 x 34(30) x 17mm; 320 x 34(30) x 17mm; 280 x 34(30) x 17mm;

250 x 34(30) x 17mm; 218 x 34(30) x 17mm; 190 x 34(30) x 17mm;

165 x 34(30) x 17mm; 140 x 34(30) x 17mm; 115 x 34(30) x 17mm;

400 x 34 x 17mm;    370 x 34 x 17mm;    300 x 34 x 17mm;

400 x 34 x 17mm;    370 x 34 x 17mm;    300 x 34 x 17mm;

The other size is optional or according to the requirements of customers.

Working temperature: 260 °C, Working pressure: 4.0MPa.

2. Two tendons (three grooves)

340 x 34 x 17mm;    320 x 34 x 17mm;    280 x 34 x 17mm;

250 x 34 x 17mm;    218 x 34 x 17mm;    190 x 34 x 17mm;

165 x 34 x 17mm;    140 x 34 x 17mm;    115 x 34 x 17mm;

280 x 34 x 22mm;    280 x 28 x 17mm;    250 x 34 x 20mm;

250 x 34 x 22mm;

The other size is optional or according to the requirements of customers.

Working temperature: 260°C, Working pressure: 4.4MPa.

3. Transparent plane

340 x 34 x 17mm;    320 x 34 x 17mm;    280 x 34 x 17mm;

250 x 34 x 17mm;    218 x 34 x 17mm;    216 x 34 x 17mm;

190 x 34 x 17mm;    165 x 34 x 17mm;    215 x 34 x 22mm;

218 x 38 x 23mm;    190 x 38 x 23mm;    165 x 38 x 23mm;

The other size is optional or according to the requirements of customers.

Working temperature: 260 °C, Working pressure: 8.0MPa

Round sight glass

Number	Diameter(mm)	Thickness(mm)
1	50	10(9-11),15(14-16),20(19-21),25(24-26)
2	55-60	10(9-11),15(14-16),20(19-21),25(24-26)
3	65-70	10(9-11),15(14-16),20(19-21),25(24-26)
4	75-80	10(9-11),15(14-16),20(19-21),25(24-26)
5	85-90	10(9-11),15(14-16),20(19-21),25(24-26)
6	95-100	10(9-11),15(14-16),20(19-21),25(24-26)
7	105-110	10(9-11),15(14-16),20(19-21),25(24-26)
8	115-120	10(9-11),15(14-16),20(19-21),25(24-26)
9	125-130	10(9-11),15(14-16),20(19-21),25(24-26)
10	135-140	10(9-11),15(14-16),20(19-21),25(24-26)
11	145-150	10(9-11),15(14-16),20(19-21),25(24-26)
12	155-160	10(9-11),15(14-16),20(19-21),25(24-26)
13	165-170	10(9-11),15(14-16),20(19-21),25(24-26)
14	175-180	10(9-11),15(14-16),20(19-21),25(24-26)
15	185-190	10(9-11),15(14-16),20(19-21),25(24-26)
16	195-200	10(9-11),15(14-16),20(19-21),25(24-26)
17	205-220	10(9-11),15(14-16),20(19-21),25(24-26)
18	225-240	10(9-11),15(14-16),20(19-21),25(24-26)
19	245-260	10(9-11),15(14-16),20(19-21),25(24-26)
20	265-280	10(9-11),15(14-16),20(19-21),25(24-26)
21	285-300	10(9-11),15(14-16),20(19-21),25(24-26)
22	305-330	10(9-11),15(14-16),20(19-21),25(24-26)
23	335-360	10(9-11),15(14-16),20(19-21),25(24-26)