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Dezhou Mingzhu Industry & Trade CO., LTD.



Product Category : Industrial Supplies >> Boilers
Product Code :
Product Name : level gauge glass
Product Info : Level Gauge Glass
It’s made from Borosilicate, it is used in lever gauge in boiler for water position.
It is also named: Reflex Gauge Glass, Sight glass, Reflex Glasses, Reflex sight glass, Spares For level Gauge.
The category is as follows:
1) Three tendons (four grooves) 2) Two tendons (three grooves) 3) Plan transparent
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.
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;
280×34×22mm; 280×28×17mm; 250×34×20mm; 250×34×22mm;
The other size is optional or according to the requirements of customers.
Working temperature: 260°C, Working pressure: 4.4MPa.
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
Level Gauge Glass Physical Property
1. Appearance
1) Air bubble:
Diameter≤0.5mm, in the 10mm x 10mm area the quantity must be ≤3.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 >40mm.
The air bubble of Diameter from 1.5mm to 2mm ≤3 on the No-sight plane. Their distance must >40mm.
On the sight plane, The distance to the side in 7.5mm,the air bubble of the diameter<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 depth>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 Lustre
It should be no color and transparent,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 hours,then Weigh up,weightlessness should be ≤75mg/dm2
5. Temperature-resistance impacts capability
Put it into electric cooker, keep for 7min under the temperature of 260℃±1℃, then, put into the water of 20±1℃,it should not crack
Bend-resistance≥80MPa




Dezhou Mingzhu Industry & Trade Co., Ltd.
Dezhou Mingzhu Industry & Trade Co., Ltd. is an industrial company with an integration of industrial production and trade. Our company was incorporated by Hebei Fuyuan Sealing Material Factory , Hebei Aohong Level Gauge Glass (borosilicate) Factory, Hebei Bright Pearl Wire Mesh Factory with capital of USD5,350,000.
Our company specializes in producing asbestos (non-asbestos) rubber sheets, asbestos cloths, ropes,tapes, level gauge glass (plane, reflex), iron & wire meshes, fiber glass meshes/screens. All of our products sell well in both domestic and international markets.
Our company has independent import and export rights. "Creditability and Sincerity" is our business principle. Now, our products are exported to Ukraine, Russia, Egypt, Iran, Europe, the Middle East, Canada, America, Australia and South Africa,etc. We are keeping long-term and good relationships with our clients.
We hope that we will have good and long-term cooperation.



Contact Information
Company :   Dezhou Mingzhu Industry & Trade CO., LTD.
Business Type :   Manufacturer
Address :   1505-1506 Fuyuan Building,Quanyechang,Hengshui,Hebei,China
City & Country :   Hengshui,,Hebei,China , China
Tel No. :   86-318-7089058
Fax no. :   86-318-7080093
Website :   http://www.62184.tradebig.com
Contact Person :   Guoxiang Zhang
e-Mail :   Click here to contact us

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