sight glass= level gauge glass=reflex glass

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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

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Dezhou Mingzhu Industry & Trade CO., LTD.

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