FDI-DICHTUNGEN®

FDI® -Fitting instructions English
Typ 21

V-Packing


• The Following instructions are applicable to FDI Packing Type 21.

• We recommend that FDI Packing Type 21 should be stored in their original packages in a dry and vented environment.

• The two terminal rings are always supplied split to optimize both support and pressure functions.

Cylinder Fitting

with adjustable housing

1. Thoroughly clean the housing and afterwards apply a liberal amount of grease to it.

2. Apply a liberal amount of grease also to every single ring of the FDI Packing Type 21.

Care should be taken not to damage the sealing lips.

3. Enter the FDI Packing Type 21 into the housing ring by ring facing lips towards the pressure.

NOTICE: Make sure each ring is properly located. Do not use any fitting tool with sharp edges which may damage the seal, when pressing the rings down into the housing.

4. Apply the gland and the retaining flange in order to give a light and uniform compression to the FDI Packing Type 21.

5. Insert metal spacers between the end of the cylinder and the gland and bolt together.

When further compression of the set is necessary decrease the thickness of the metal spacers.

Cylinder Fitting

with NON adjustable housing

1. For non adjustable housings we supply our FDI Packing Type 21 with calibrated height.

Therefore it is essential to check that

housing depth H1 less the gland length H2 corresponds to the nominal height Hnom.

2. Thoroughly clean the housing and afterwards apply a liberal amount of grease to it.

3. Apply a liberal amount of grease also to every single ring of the FDI Packing Type 21.

Care should be taken not to damage the sealing lips.

4. Enter the FDI Packing Type 21 into the housing ring by ring facing lips towards the pressure.

NOTICE: Make sure each ring is properly located. Do not use any fitting tool with sharp edges which may damage the seal, when pressing the rings down into the housing.

5. Apply the gland and the retaining flange in order to give a light and uniform compression to the FDI Packing Type 21 and bolt together

6. When further compression of the FDI Packing Type 21 is necessary open the housing and insert metal spacers with calculated thickness between the FDI packing and the gland

Piston Fitting

1. Check that housing depth corresponds to the nominal packing height.

2. Enter the Packing ring by ring facing the lips towards the pressure.

Make sure each ring is properly located.

3. Apply the retaining flange bolt together and enter the piston equiped with FDI Packing Type 21 into the cylinder.

FDI® und FDI-DICHTUNGEN® sind eingetragene Marken der Friedrich GmbH

FRIEDRICH GmbH - Höffgeshofweg 2 - 47807 Krefeld, Germany - www.fdi-dichtungen.com
Tel.: ++49-(0)2151-835770 - Fax: ++49-(0)2151-835777 - e-mail: info@fdi-dichtungen.com

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