Standard_Parts_Catalogue

Page 1560 | 3.5 Controlling, Venting, Sealing of Liquids and Gases GN 537 Oil Sight Glasses Aluminum / Perspex, without Thread 1 d 1 2 d 2 3 Type How to order 1 2 3 GN537-32-38-B 3 Type A Without oil level marks B With oil level marks 1 2 d 1 Viewing window d 2 Bore Ø b min. d 3 d 4 e ±0,1 h l 1 l 2 Code no. Pin key for installation 16 20  9 25 2,2 21    5 15 3,5 GN 537.1-21 22 28 10 35 3   30    6 15 4,5 GN 537.1-30 32 38 12 45 3   40    8 18 5,5 GN 537.1-40 50 58 14 64 3   58,5 10 22 5,5 GN 537.1-58,5 This oil sight glass GN 537 does not require a thread. The oil sight glass is inserted into the bore d 2 to H11. By simply tightening the ring nut using the pin key the seal is pressed against the contact surface which, at the same time, will hold the sight glass in position. For removal reverse the procedure. Their application is limited to non-pressurised or only slightly pressurised tanks. see also... • Oil Sight Glasses GN 542 (without Thread) → Page 1558 • Oil Sight Glasses GN 545.2 (without Thread) → Page 1559 Information • Ring nut Aluminum • Sight glass Perspex (PMMA) Temperature resistant up to 80 °C • Seal Rubber NBR (Perbunan ® ) • Reflector Plastic White, with red oil level marks • ISO Fundamental Tolerances → Page 2151 • Elastomer Characteristics → Page 2158 • RoHS Specification • Pin Key for Installation GN 537.1 (code no. see table) Accessory