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Product Family Hygienic Design

Standard Parts of the “Hygienic Design” product family are labeled with the HD icon. They combine high surface quality, freedom from dead spaces, non-scooped outer surfaces, and sealed bolting areas. A sealing concept based on FEM calculations ensures reliable contact pressure after installation.

suitable for use in hygienically sensitive areas
quick and easy cleaning
no dead spaces due to functional seals
certified according to EHEDG guidelines

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Product Family Stainless Steel

Standard parts made of rustproof stainless steel have been designed for use in the food sector, in the chemical industry, for aggressive ambient conditions or for outdoor use.

corrosion-resistant
precise fit
environmentally friendly

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Standard sheet GN 20 (636 KB) Print this page Application video GN 20 Hygienic Design brochure (4 MB) Operation instruction GN 20 type B (1 MB) Hygienic Design information EHEDG Certification (2 MB) 3A Certificate (99 KB) Elastomer characteristics (185 KB) Stainless Steel characteristics (156 KB)

Product description

Information

GN 20 Stainless Steel-Levelling feet with mounting holes are certified according to EHEDG and 3-A Sanitary Standard Inc. guidelines and are therefore ideal for use in hygienic areas.

The bottom seal protects the area beneath the foot plate from dirt. For this, the foot must be screwed on using the mounting holes and compressed accordingly. Hygienic fastenings, e.g. GN 1580 screws and nuts, and the correct position of the mounting holes are essential. The sealing ring above the adjustment sleeve enables fastening without dead space. Due to the wiper or the ball seal, the moving components are sealed against the environment.

The high quality finish prevents adherence of dirt and facilitates cleaning.

The values listed in the table for static load capacity refer to a purely vertical load in relation to the leveling foot. Under normal operating conditions bending loads or angular loads are not uncommon and result in a reduction of load capacity, which must be taken into consideration.

Specification

Spindle, adjustable sleeve, foot plate

Stainless Steel AISI 304
turned

Seals, blue, FDA compliant

Sealing ring
NBR, hardness 70 ±5 Shore A
Wiper
TPU, hardness 95 ±5 Shore A
Joint sealing ring
H-NBR, hardness 85 ±5 Shore A
Bottom seal
Silicon, hardness 85 ±5 Shore A

RoHS

d₁	d₂	l₁		d₃	d₄	l₂	l₃	k	A/F1	A/F2	Static load in kN (see information)

100	M 16	175	225	28	12	19	35	69	18	22	30
100	M 20	185	235	32	12	24	35	69	24	27	47
100	M 24	185	235	36	12	29	35	69	24	30	67
120	M 16	175	225	28	12	19	35	89	18	22	30
120	M 20	185	235	32	12	24	35	89	24	27	47
120	M 24	185	235	36	12	29	35	89	24	30	67

GN 20 Stainless Steel-Levelling feet Hygienic Design, with mounting holes, certified acc. EHEDG and 3A SSI

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Product Family Hygienic Design

Product Family Stainless Steel

Product description

Information

Specification

Technical drawing

Article options / Table

Type

Build & Price

Mounting example

Design principles for Hygienic Design

Seals

Application example

Selected Part (How to order)

CAD data

CAD data

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EHEDG - European Hygienic Engineering & Design Group - non-profit European consortium of machine and food manufacturers as well their suppliers, research institutes, universities and government health agencies - approximately 45 guidelines - examination of products and issue of certificates
3-A Sanitary Standard, Inc. - non profit and independent association in the USA - three interest groups: public and governmental health agencies, machine and food manufacturers - over 70 Sanitary Standards - examination of designs and processes, issue of certificates


For the standard parts which are listed in Hygienic Design, seals have the central function of protecting dead spaces, gaps and cracks from the penetration of cleaning fluids or product residues. For this, a defined pre-tension or pressing of the seals and wipers is necessary for a reliable and permanent seal in the installed condition. Within the Hygienic Design product family, seal installation spaces and seal cross sections are calculated and designed with simulation software, so that the necessary surface compression is achieved on installation and the seal material is not subjected to excess pressure. A fundamental differentiation can be made between static and moving seals: Is the static seal, application examples shown below the top faces the mounting surface (sealing ring) and the bottom faces the contact surface (bottom seal), so that the corresponding pressure is achieved by tightening. It should be ensured that all surfaces which make contact with the seal have a surface finish of al least Ra 0.8 µm. The moving seals on the adjustable sleeve (wiper) and the ball joint (joint sealing ring) of the foot are designed so that they allow adjustment in both height and angle. With these too, the installation space together with the cross section of the seal ensures a gap-free, pre-tensioned seal. Depending on the version and the type of use, it may be the case that seals may need to be replaced in case of damage or for preventative maintenance. For this, Ganter supplies the relevant seals as spare parts or offers these under Sealing rings GN 7600 as standard parts for spare parts.


With the example of a GN 20 Hygienic Design levelling foot, the illustrated design shows how the various seal configurations can be designed.