Hygienic_Design

Page 18 | Highlights - Standard Parts in Hygienic Design Indexing plungers GN 8170 are certified according to DGUV Test guide- lines and meet hygiene requirements on the knob side (front hygiene). Wipers between the knob and the guide as well as the sealing ring between the guide and the housing keep the locking mechanism on the knob side leak-tight. At the same time, the high surface quality (Ra < 0,8 μm) and dead-space-free mounting prevent dirt from adhering and facilitate cleaning. Indexing plungers with a rest position (Type C) are used for such applica- tions where the plunger has to stay in its retracted position. In that case, the knob is retracted and afterwards turned by 90°. A notch keeps the plunger in this position. Mounting holes and through-holes in the housing must be at a right angle, free of burrs and without a chamfer. This ensures that the sealing rings will function properly. Information • Stainless steel AISI 316 Plunger pin case hardened • Pressure spring Stainless steel AISI 316Ti • Seals, blue, FDA compliant Temperature resistant -25 °C to +110 °C - Sealing ring H-NBR, hardness 85 ±5 Shore A H - Wiper TPU, hardness 95 ±5 Shore A • All moving parts lubricated with FDA compliant grease • Load Rating Information Main Catalogue Page 2132 • ISO Fundamental Tolerances Main Catalogue Page 2151 • Elastomer Characteristics Page 38 • Stainless Steel Characteristics Page 39 • RoHS Specification 4 2 Type B Without rest position C With rest position 3 Coding FH Knob side in Hygienic Design (front hygiene) 1 d 1 Plunger f8 Bore H8 d 2 d 3 d 4 d 5 l 1 l 2 l 3 k A/F Spring load in N ≈ Initial End 6 35 M 12 x 1,5 18 22,8 6 12 49,8 29 14 20 36 8 35 M 16 x 1,5 18 22,8 8 12 54,3 29 14 22 32 1 d 1 2 Type 3 Coding 4 Material (Sealing ring) How to order 1 2 3 4 GN8170-8-C-FH-H GN 8170 Indexing Plungers Stainless Steel, DGUV Certified, Knob Side in Hygienic Design (Front Hygiene)