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Sight Glass Fittings NORIS Obround to be welded directly to tank Bauform 225 Application: To show surface of a liquid, for insertion into attachment to tanks, vessels and silos. Operating conditions: Temperature : 100° or 280° C C Pressure: 3 / 6 / 25 bar Materials: Body Cover Screws Glass Gaskets WN 1.4571 RSt 37-2 / H II WN 1.4571 RSt 37-2 / H II A4-70 8.8 vz Borosilicate glass acc. to DIN 7081 Soda lime glass acc. to DIN 8903 Asbestos free ( or other materials ) Mounting instruction: After welding please examinant if sealing area is plane. Otherwise re-machining is necessary. Caution: Before putting the fitting into operation, the strength of the cutout reinforcement in combination with the vessel wall should be checked in accordance with TÜV leaflet B9 ( AD Merkblatt B 9 ) Example for an order: Sight glass fittings, obround Bauform 225 Body WN 1.4571 Cover RSt 37-2 Borosilicate glass – 3 bar 410 x 120 mm Pressure 3 bar, Visual 50 mm Mounting dim. Sight dim. Length x Width Length x Width Strength h1 h2 270 x 120 340 x 120 410 x 120 480 x 120 550 x 120 620 x 120 690 x 120 760 x 120 200 x 50 270 x 50 340 x 50 410 x 50 480 x 50 550 x 50 620 x 50 690 x 50 15 15 15 15 15 15 15 15 25 25 25 25 25 25 25 25 Pressure 6 bar, Visual 30 mm Mounting dim. Sight dim. Length x Width Length x Width Strength h1 h2 250 x 100 310 x 100 370 x 100 430 x 100 490 x 100 550 x 100 610 x 100 670 x 100 180 x 30 240 x 30 300 x 30 360 x 30 420 x 30 480 x 30 540 x 30 600 x 30 15 15 15 15 15 15 15 15 25 25 25 25 25 25 25 25 Pressure 25 bar, Visual 20 mm Mounting dim. Sight dim. Length x Width Length x Width Strength h1 h2 176 x 70 226 x 70 256 x 70 316 x 70 376 x 70 436 x 70 496 x 70 536 x 70 126 x 20 176 x 20 206 x 20 266 x 20 326 x 20 386 x 20 446 x 20 486 x 20 20 20 20 20 20 20 20 20 25 25 25 25 25 25 25 25 E225 09/07 Modification reserved NORIS ARMATUREN Burkenstein GmbH & Co. KG Puscherstrasse 3 D-90411 Nürnberg Telefon: +49 (0) 911 / 52 150 63 Telefax: +49 (0) 911 / 52 24 40 Internet: Noris-Armaturen.de E-Mail: Noris@Noris-Armaturen.de

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