Its 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) Size: 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 400x 34x 17mm 370x 34 x 17mm 300 x 34 x 17mm The other size is optional or according to the requirements of customers. Working temperature: 260 ℃, Working pressure: 4.0MPa
Two tendons (three grooves) Size: 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 34x 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 ℃, Working pressure: 4.4MPa
Transparent plane Size: 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 ℃, Working pressure: 8.0 MPa
The material：Borosilicate Glass
Level Gauge Glass Physical Property
Testing Item
Standard Rules
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 mustnt be more 2. 2)The glass dont allow slag and scrap iron, etc. impurity. 3) Stripe : dont allow have palpable filaceous and pectinate stripe on the sight plane. 4) Cockle: In the side face, dont allow have the cockle of depth ＞1mm. 5) Crack:dont allow have crack. 6) Scrape: On the sight plane and in the 7.5mm to edge, the scrape of less than 10mm dont allow more 2 strips. 7)The sight plane must be polishing, and sealing side must be rubbing and polishing.
2. Colour 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 0~31 ug/g
4. Alkali-resistance
Cooked in the 0.5N NaoH for 3 hours，then Weigh up，weightlessness should be ≤75 mg/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
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TONGFENG¼HK¼INDUSTRY CO., LTD is a group company.It is a all-around enterprise with researching and development, manufacturing and sales. In mainland China, we own three factories and two marketing company in Hebei area of China. So as to ensure lowest cost, best price and high quality. Those also make us to provide ample supply, delivery on time and outstanding services. We export our products...
