Genebre 2830 User manual

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
1
INSTALLATION, OPERATION AND MAINTENANCE
MANUAL
Rubber expansion joints
GENEBRE Reference: 2830 - 2830N - 2831 - 2831A - 2833

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
2
Installation, operation and maintenance instructions
1. Breakdown.........................................................................................................................3
1.1) Drawing.......................................................................................................................3
1.2) List of components ......................................................................................................4
2. Storage ..............................................................................................................................4
3. Installation instructions.......................................................................................................4
3.1) Preparation..................................................................................................................4
3.2) Assembling..................................................................................................................5
4. Operational instructions......................................................................................................6
4.1) Operation.....................................................................................................................6
5. Maintenance operations.....................................................................................................7
6. Reparation instructions.......................................................................................................7
7. Torques..............................................................................................................................7
7.1) Maximum recommended torque to tighten the flanges' screws....................................7
8. Hygiene and Safety Instructions.........................................................................................8

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
3
1.) Breakdown
1.1) Drawing
Art. 2830 / Art. 2830N
Art. 2831 / Art. 2831A Art. 2833

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
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1.2) List of components
Art. 2830 / Art. 2830N
Nº
Name
Material
Surface
Treatment
1
Body
EPDM + Nylon
------
2
Clamp
Carbon steel
Zinc plated.
3
Union
Carbon steel
Zinc plated.
4
Racord
Carbon steel
Zinc plated.
Art. 2831 / Art. 2831A / Art. 2833
Nº
Name
Material
Surface
Treatment
1
Body
EPDM + Nylon
------
2
Flange
Carbon steel
Zinc plated.
3
Ring
Carbon steel
Zinc plated.
2) Storage
During storage, it is recommended to keep the product away from humidity, dirt, corrosive
environments or direct sunlight. Do not remove the protective wrapping until joint is to be
installed, to avoid damages or dirt accumulation. As much as possible, equipments must be
stored in a dry and clean environment.
3) Installation instructions
3.1) Preparation
Remove any material remains of the product wrapping.
Serious problems may arise with the installation of a joint in a dirty pipe.

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
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Make sure the pipe is not dirty and doesn’t have welding particles, for example, before
installing it. This may cause irreparable damages to the elastomer when the equipment is
started → prepare a clean working area.
Do not use sharp pointed objects when manipulating the product.
Plan beforehand enough space for future maintenance operations.
Gaskets between joints and pipe flanges are not necessary, as the elastomer is designed to
keep tightness amongst them.
It is fundamental a correct selection and placement of the joint (see service settings in the
technical specifications for this product) and a good anchoring and guidance of the system.
Rubber expansion joints are bidirectional and can be installed in any position.
3.2) Assembling
Art. 2831 / Art. 2831A / Art. 2833 Art. 2830 / Art. 2830N
IMPORTANT:
- Rubber expansion joints by Genebre, S.A. are designed to be assembled between
flanges DIN PN10 (art. 2831/art. 2833), flanges ANSI 150 (art. 2831A) or in a threaded
GAS pipe (art. 2830) or NPT (art. 2830N)
- Generally, never install more than one joint between two fixed points
- Flanges used during assembling must be completely flat.
- Tightening of screws and nuts has to be crossed, gradual and even. To obtain more
information, please consult the maximum torque values for the flanges in the table in
section 7.1 of this manual.

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
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- In case of assembling through a slip-on flange (welding cable inside the pipe) it is
recommended to place a joint or spacing element, as the elastomer can be damaged.
- When assembling threaded joints (art.2830 and art.2830N) make sure the union is
tightened with a sealing element (PTFE tape or similar). It is also recommended not to
exceed 30 Nm. torque.
- In case you want to use the joint as a way to muffle vibrations and noise in pumps, it
is recommended to keep a certain distance between the joint and the pump,
approximately 1 to 1.5 times the nominal diameter of the pipe
- Do not paint or lubricate the elastomer's body
4) Operational instructions
4.1) Operation
Rubber expansion joints provide an optimal result when used adjusted to the pressure and
temperature values for which they have been designed.
Displacements to be absorbed by joint will depend basically on the calculation done during
installation design. These displacements can be in four different ways:
Consult the displacement limits in the table included in the technical specifications for the
product.

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
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5) Maintenance operations
Rubber expansion joints are designed so that they do not require a periodical lubrication
and/or maintenance. Note that their service life is limited and depends on parameters such
as pressure, temperature, environmental conditions, exposure to ozone, number of cycles,
materials compatibility, displacements or correct anchoring and guidance.
However, periodical checks explained below will be useful to extend the service life of the
equipment and reduce installation problems:
- Verify all locks and threaded ends to check if they are loose or rusted. In case of leak,
tighten as needed.
- If the leak persists, disassemble and check the state of contact surfaces and, if needed,
replace the damaged pieces.
- In case the elastomer’s body is excessively deformed or eroded, replace the whole product.
6) Reparation instructions
Before removing a valve or accessory from a pipe, always check if the line is completely
drained and depressurized.
For design reasons, in case the joint is totally or partially damaged, it must be replaced
completely.
7) Torques
7.1) Maximum recommended torque to tighten the flanges' screws
MEASURE
Maximum torque value
(N.m.)
1 ¼” ~ 4”
50
5” ~ 6”
60
8” ~ 14”
80
16” ~ 20”
100

Genebre Building. Av. de Joan Carles I, 46-48
08908 L'Hospitalet de Llobregat. Barcelona (Spain)
[email protected] - www.genebre.es
GENEBRE S.A.
LAST UPDATE: 23/04/2020 UPDATE NUMBER: 1
8
8) Hygiene and Safety Instructions
8.1) Fluid passing through a valve or accessory can be corrossive, toxic, flammable or
pollutant. When operating valves, you must follow the security instructions and it is
recommended to use personal protection gadgets:
1) Protect your eyes.
2) Wear gloves and appropriate working clothes.
3) Wear safety footwear.
4) Wear a helmet.
5) Have running water at hand.
6) To operate flammable fluids, make sure you have an extinguisher at hand.
8.2) Before removing a valve or accessory from a pipe, check always if the line is completely
drained and depressurized.
8.3) Any valve being used by toxic services department needs to obtain a cleanliness
certificate before being operated.