Hygienic_Design

Page 19 | Highlights - Standard Parts in Hygienic Design Indexing plungers GN 8170 are certified according to DGUV Test guide- lines, and with their additional sealing nuts, they meet hygiene require- ments on the knob and pin sides (full hygiene). Wipers between knob and guide and between guide and pin as well as sealing rings on the guide and sealing nut keep the locking mechanism 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. 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 pro- perly. 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 rings 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 VH Knob and pin side in Hygienic Design (full hygiene) 1 d 1 Plunger f8 Pin H8 d 2 d 3 −0,1 d 4 d 5 d 6 l 1 l 2 l 3 l 4 k s Clamping length A/F 1 A/F 2 Spring load in N ≈ min. max. Initial End 6 35 16 18 22,8 22 6 27,5 50,5 14,5 29 1,5 4 14 18 20 36 8 35 16 18 22,8 22 8 29,5 55,5 14,5 29 1,5 4 14 18 22 32 1 d 1 2 Type 3 Coding 4 Material (Sealing ring) How to order 1 2 3 4 GN8170-6-B-VH-H GN 8170 Indexing Plungers Stainless Steel, DGUV Certified, Knob and Pin Side in Hygienic Design (Full Hygiene)