Sight glass wiper for circular sight glass plates

Nuts Stud bolts Cover flange Glass cushion Sight glass Gasket Base flange Our round sight glasses type 320 are welded on or in a container wall to allow for observation or illumination of the inside of the container. A sight glass made of chemically highly resistant borosilicate glass DIN7080 is clamped between two high-quality stainless steel flanges and proven quality seals.  Beyond the definitions of DIN 28120, we also offer type 320 in special sizes of DN 250 and DN 300. These sizes, not specified in the standard, have also been constructed in accordance with DIN 28120.  Our sight glasses type 320 are made from high-quality stainless steel 1.4571 (316Ti), which our customers have appreciated for years. The glass material used is the tried-and-tested borosilicate glass according to DIN 7080 (or according to customer specifications).  The sealing of the fitting is done with flat seals tailored to your needs from a comprehensive range of materials. In addition to the common fiber seals, this also offers more demanding materials such as PTFE (Teflon®), NBR, novaphit® MST-XP, KlingerSil® C4400, and many other brand seals. If the maximum operating temperature of borosilicate glass DIN 7080 does not meet your requirements, or if the process conditions pose a problem even for the highly resistant borosilicate glass, a mica protection disk specially adapted for the fitting offers additional protection against temperature and steam. FEP or Halar® coatings additionally protect the borosilicate glass from aggressive chemicals or alkalis. Like other sight glass fittings, type 320 can be equipped upon request with sight glass wiper type SGW and SWII, spray devices SVI, or lights. Cross-sectiondrawing Dimensions DN 25 40 50 80 100 125 150 200 250² 300² Da [mm] 115 150 165 200 220 250 285 340 395 445 Di [mm] 48 65 80 100 125 150 175 225 280 325 h1 [mm] 16 16 16 20 22 25 30 35 40 45 h2 [mm] 25 30 30 30 30 30 36 36 40 45 Glass-Ø [mm] 63 80 100 125 150 175 200 250 300 355 s (PN10) [mm] 10 10 12 15 20 20 25 30 45 45 s (PN16) [mm] 10 12 15 20 25 25 30 - - - Weight (PN 10) [kg] - 5,4 5,9 9,6 11,1 14,3 21,9 30,7 44,7 59,2 Weight (PN 16) [kg] 2,8 5,4 6,0 9,7 11,3 14,6 22,4 - - - 2) Similar to DIN 28120

Dimensions and properties of rounded sight glasses with central hole Dimension D x s[mm] Viewing Diameter d1[mm] Nominal Pressure[bar] Soda lime glass, material acc. to DIN 8902 – up to 150°C 63 x 10 48 6 80 x 12 65 6 94 x 111) 801) 6 100 x 15 80 6 113 x 151) 1001) 6 125 x 15 100 6 141 x 151) 1251) 6 150 x 19 125 5 166 x 151) 1501) 4 175 x 15 150 4 200 x 15 175 4 225 x 15 205 2 250 x 15 225 2 Borosilicate glass, material acc. to DIN 7080 – up to 280°C 63 x 10 48 6 80 x 12 65 6 94 x 111) 801) 6 100 x 15 80 6 113 x 151) 1001) 6 125 x 15 100 6 141 x 151) 1251) 6 150 x 19 125 6 166 x 151) 1501) 6 175 x 19 150 6 200 x 19 175 4 225 x 15 205 2 250 x 25 225 4   1) For screwed sight glass fittings, material acc. to DIN 11851 The diameter of the center hole in the sight glass is 10.5 mm. Other dimensions on request. Rounded sight glass may be subject to evaporation or covering substance from observed tank. This could have a significant impact on reducing the visibility. In this case it is recommended to use a round glass with wiper. Examples of wipers for round glasses we discuss here. Installing a wiper, however, requires the use of glass spy hole in the middle. This solution may affect allowable pressure, which can operate under glass with wiper. There are a rounded sight glassmade of soda-lime glass and of borosilicate glass.  Dimensions and properties of rounded sight glasses with central hole are discussed below.