Seals Assembly Guide

Guidelines For Duo-Cone Seals Installation

Mechanical Seal Design

Mechanical Face Seals are fitted in Groove of retaining housing groove, to form the sealing at the adjoining faces. Metal faces are precision Lapped. The ramp angle of Seal and Housings are slightly different and form a wedge for the rubber ring to slide into and form a compressed profile giving load on the seals and making it intact.

Image

Terminology:

Seal Ring
Rubber Toric
Housing Retainer
Housing Ramp
Seal Ring Housing
Seal Ring Face
Seal Ring Ramp
Seal Ring Retaining Lip
Installation Tool

Housing Preparation:

The housing components which contact the rubber toric rings (3 and 4 a) must be free from foreign parti-cles, etc) before installing the seal. This should be done using a lint free wipe and a non-petroleum based solvent especially SAP Parts Seal-O-Fix Spray.
Dry with a clean wipe. Remove any foreign material from the rubber torics (2), the ramps (7) and the lips (8) of both seal rings.
Place the rubber torics on the metal seal ring at the bottom of the seal ring ramp and against the bottom of the seal ring ramp and against the, retaining lip.
Make Sure the O-Rings remain straight on the rim and not squeezed or twisted as it may lead to improper installation of the float seal.


Housing Preparation

Approved Assembly Lubricants:

SAP Parts - Seal-O-Fix Spray / Isopropyl Alcohol* Follow all the safety practices for handling volatile solvents. Do not use any other oil that leaves oil film or do not evaporates.

Image

SAP Parts Seal Installation Tool:

Below is how the Seal installation tool looks like. It consists of a circular bracket type polyamide ring with steel clamping arrangement and check nut, that holds the seal with O-Ring in the special groove made at the face of bracket ring and pushes the O–ring in the housing groove.

Duo Cone Seal Installation Process:

It is always recommended the Duo Cone / Metal Face Float Seals must be installed using proper Installation Tool only.

Image

Steps By Step Seal Installation:

1. Arrange Right Duo cone Seal, Installation Tool, Seal-O-Fix Spray, Mallet, Lint Free Cloth, etc. as shown below before starting actual seal installation in the housing cavity.

Image

2. Check you are using appropriate tool part number and design provided by SAP Parts for the Seal. Note:- Each seal has different Tool. Check Seal face, O-Ring & housings are clean and free from any mechanical damage, dent etc.

Image

3. Apply Seal-O-Fix on Seal face and clean the Seal using Lint Free Wipe. Ensure the seal face be thoroughly cleaned and no fine particles of dust should remain on it. Employ the spray on the O-Ring circumference, this gives sufficient lubrication for Seal to fit in the cavity of Housing.

Image

4. Put the O-Ring on the Seal Ramp and check it is properly sleeved, Check there is no skewing or twisting of O-Ring.

5. Hold the O-Ring on the Seal Ramp and engage the Lip of the tool between the gap of O-Ring and seal face inside the circular guide way groove of the Tool.

Image

6. Bring the edges of clamp close to each other and tighten the check nut provided on tool so as to hold the seal firmly in the clamp formed.

7. This makes the Seal Guided in the Install Tool.

Installation of Seal inside the Housing Groove:

1. For installation of Seal, arrange a cleaned Seal & cleaned, wiped housing. Put the Seal on the Housing
2. Hold the O-Ring in the Fixture and form the tool guide assembly as explained above.
3. Hold the Seal and O-Ring Firmly and see O-Ring is not twisted. Locate the seal & tool on groove opening.
4. Press the fixture with even load on the Guide Plate, and experience the O-Ring insertion jerk, inside the housing. Small Rings can be manually fixed, for big rings apply even and gentle pressure around the rim of guide plate using wooden mallet.

Image

Caution !!!

The Rubber O-Ring can twist if it is not wet all around during installation or if there are burs and fins on the retaining ramp of housing. Twist, misalignments, and bulges of O-Ring will result in seal failure . If Seal in not installed correctly , remove it from housing and repeat the process.

Image
Never use Rubber O–Rings with Blow holes/ damages.
Never allow Sealing surface be dirty, it should be cleaned well before Assembly.
Never try hammering on sealing surface and never use sharp tools to locate O-Rings.

Image
Clean the Sealing Surface thoroughly before installation.
Use Seal–O-Fix Spray.
Check for Sealing edge free from dust, dirt, hair, etc.
Always use only lint free Wipes/Cloths, Never use tissue Paper or cotton waste.
While completing the final assembly of the unit, make sure that both seals are in correct housings together. High impact can scratch or break the seal components.

Image