Standard_Parts_Catalogue

Page 1551 | 3.5 Controlling, Venting, Sealing of Liquids and Gases 3.1 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 1 d 1 2 d 2 How to order (Seal collared) 1 2 GN541.3-20-G¾ 1 d 1 2 d 2 How to order (Seal overlying) 1 2 GN 541.2-14-G1 Prismatic oil sight glasses GN 541.2 / GN 541.3 are practically indestruc- tible. Therefore, they are designed to be relatively thin. These oil sight glasses are fitted with a window creating a prismatic ef- fect of a „cat’s eye“ to provide a clearer and unmistakable oil level reading irrespective of oil colour or viscosity. The advantage of this effect beco- mes obvious in cases such as underfilling or overfilling and monitoring the situation under unfavourable conditions. Prismatic oil sight glasses GN 541.2 / GN 541.3 can also be used in tanks which are pressurised. Test results are available. Assembly instruction: For mounting on walls of less than 4 mm thickness please use mounting nuts GN 7430. Information • Plastic Crystal clear Polyamide (PA 6-T) - - Ageing resistant - - High mechanical strength - - Temperature resistant up to 100 °C - - Solvent resistant, but not suitable for alcohol • Seal Rubber NBR (Perbunan ® ) • Elastomer Characteristics → Page 2158 • Plastic Characteristics → Page 2158 • RoHS Specification • Mounting Nuts GN 7430 → Page 1632 Accessory 1 2 GN 541.3 d 1 Window glass d 2 d 3 l 1 l 2 s Recommed tightenin torque in Nm 15 G 1 ⁄ 2 28   10,5  9 24  8 ... 10 20 G 3 ⁄ 4 35   10,5 10,5 32 10 ... 12 24 G 1 42,5 11 13,5 38 10 ... 12 30,5 G 1 1 ⁄ 4 52 19 16 41 12 ... 14 1 2 GN 541.2 d 1 Window glass d 2 d 3 l 1 l 2 s Recommed tightenin torque in Nm  9 G 1 ⁄ 4 18   10    6 15 2 ...  3 11 G 3 ⁄ 8 22    7,5  7 19 3 ...  5 14 G 1 ⁄ 2 26   10,5  8 22 4 ...  6 20 G 3 ⁄ 4 31,5 10,5  9 27 6 ...  8 25 G 1 40   11   10 34 8 ... 10 Original design HFTX-PR/HFTR-PR GN 541.2 GN 541.3 Prismatic Oil Sight Glasses Seal Overlying Seal Collared Crystal Clear Plastic