The press connector system is designed for nominal pressure PN 16.

Use is possible in the following areas among others:

• Potable water installations

• Industrial and heating systems

• Sprinkler systems (no certification for d 64)

  • Wet sprinkler systems (with EPDM sealing element)

  • Wet / dry sprinkler systems (with FKM sealing element)

  • Dry sprinkler systems (with FKM sealing element)

• Fire extinguishing systems, see Regulations from section: Application areas

  • Wet

  • Wet / dry

  • Dry

• Solar installations with flat collectors

• Solar installations with vacuum collectors (only with FKM sealing element)

• Compressed air systems

• District heat supply systems in secondary circuits

• Low-​pressure steam systems (only with FKM sealing element)

• Cooling water pipelines (closed circuit)

• Painting systems (only with labs-​free components)

For information on areas of application of the sealing elements, see Sealing elements .

For planning, execution, operation and maintenance of potable water installations, observe the applicable regulations, see Regulations from section: Application areas .

Inform your customer or the operator of the potable water installation that the system has to be maintained on a regular basis, see Regulations from section: Application areas .

Only EPDM sealing elements are approved in potable water installations. Do not use any other sealing elements.

The system is suitable for the following media, amongst others:

For the applicable directives, see Regulations from section: Media .

• Potable water

  • Max. chloride concentration 250 mg/l

• Heating water for pump hot water heating systems

• Compressed air in compliance with the specification of the sealing elements used

  • EPDM at oil concentration < 25 mg/m³

  • FKM at oil concentration ≥ 25 mg/m³

• Anti-​freeze, cooling brines up to a concentration of 50 %

• Steam in low-​pressure steam systems (only with FKM sealing element)

The piping system consists of press connectors in connection with stainless steel pipes and the corresponding press tools.

The system components are available in the following dimensions: d 64.0 / 76.1 / 88.9 / 108.0.

The following pipes are available from the system described:

Only pipe clamps with chloride-​free sound insulating inlays should be used to secure the pipes.

Observe the general rules of fixing technology:

• Do not use fixed pipelines as a support for other pipelines and components.

• Do not use pipe hooks.

• Observe distance to press connectors.

• Observe the expansion direction: Plan fixed and gliding points.

Make sure to affix the pipelines in such a way as to de-​couple them from the installation body, so that they cannot transfer any structure-​borne sound, resulting from thermal expansion or possible pressure surges, onto the installation body or other components.

Observe the following fixing distances:

Pipelines expand with heat. Heat expansion is dependent on the material. Changes in length lead to tension within the installation. These tensions must be compensated for with suitable measures.

The following are effective:

• Fixed and gliding points

• Expansion equalisation joints (expansion bends)

• Compensators

The length expansion Δl can be taken from the diagram or can be calculated using the following formula:

Δl = ⍺ [mm/mK]× L [m]xΔ ϑ [K]

On Sanpress Inox XL press connectors, there is a cutting ring, a separator ring and a sealing element in the bead of the press connector. The cutting ring cuts into the pipe during pressing and ensures a force-​fit connection.

During installation, and later during the pressing, the separator ring protects the sealing element from damage from the cutting ring.

Viega press connectors are equipped with the SC‑Contur. The SC‑Contur is a safety technology that is certified by the DVGW and ensures that the press connector is guaranteed to be leaky in an unpressed state. In this way, inadvertently unpressed connections are noticed during a leakage test.

Viega guarantees that accidentally unpressed connections become visible during a leakage test:

• with the wet leakage test in the pressure range from 0.1–0.65 MPa (1.0–6.5 bar)

• with dry leakage test in the pressure range from 22 hPa–0.3 MPa (22 mbar–3.0 bar)

The press connectors are factory-​fitted with EPDM sealing elements. For areas of use with higher thermal resistance, such as e.g. in the case of district heat supply or low-​pressure steam systems, the press connectors must be equipped with FKM sealing elements.

The sealing elements can be distinguished as follows:

• EPDM sealing elements are polished black.

• FKM sealing elements are matt black.

The pipe markings contain important information regarding the material configuration and manufacture of the pipes. Their meaning is as follows:

• Manufacturer

• System name

• Pipe material

• Certification

• Dimension

• Supplier's mark

• Date of manufacture

• Batch number

• CE marking

• DOP and DOP number

• Manufacturing standard

In potable water installations, piping components from different metals can have a detrimental effect on each other and cause corrosion, for example. Adapters made of stainless steel, for instance, must not be connected directly to pipes or threaded connectors made of galvanised steel.

Please contact Viega for questions on this subject.

Protect the press connector system against excessively high concentrations of chloride generated by both the medium and by external factors.

An excessive chloride concentration can lead to corrosion in stainless steel systems.

Avoid external contact with materials containing chloride

• Insulating materials must not have a water-​soluble chloride ion content that exceeds 0.05 %.

• Sound insulating inlays on the pipe clamps must not contain leachable chloride.

• Stainless steel pipes must not come into contact with building materials or mortar containing chloride.

If external corrosion protection is required, observe the pertinent guidelines, see Regulations from section: Corrosion .

System components may, in some cases, have become damaged through transportation and storage.

• Check all parts.

• Replace damaged components.

• Do not repair damaged components.

• Contaminated components may not be installed.

Exchanging a sealing element is permitted in the following situations:

• if the sealing element in the press connector is obviously damaged and should be exchanged for a Viega spare sealing element made of the same material

• if an EPDM sealing element should be exchanged for an FKM sealing element (higher thermal resistance, e.g. for industrial use)

For the Z dimensions, refer to the respective product page in the online catalogue.

The following tools are required for production of a press connection:

• Pipe cutter or a fine-​toothed hacksaw

• Deburrer and coloured pen for marking

• press machine with constant pressing force of 32 kN

• Press ring with corresponding hinged adapter jaw, suitable for the pipe diameter and with suitable profile

For information about tools, also see Required tools .

The pipe ends must be thoroughly deburred internally and externally after shortening.

Deburring prevents the sealing element being damaged or the that the press connector cants when mounted. Viega recommends using a deburrer (model 2292.4XL).

Requirements:

• The pipe end is not bent or damaged.

• The pipe is deburred.

• The correct sealing element is in the press connector.

  EPDM = polished black

  FKM = matt black

• Sealing element, separator ring and cutting ring are undamaged.

• The complete sealing element, separator ring and cutting ring are in the bead.

In the press connector system shown, flange connections in sizes 64.0 to 108.0 mm are possible.

The assembly of flange connections may only be carried out by qualified personnel. Personnel can be qualified to assemble flange connections on the basis of applicable directives, for example; see Regulations from section: Establishing a flange connection .

• A corresponding training section on proper flange connection assembly in vocational training (of staff/specialist personnel) with qualified completion as well as successful regular application are considered as sufficient proof.

• Other employees without the appropriate technical training (e.g. operating personnel) who are to install flange connections must be provided with technical knowledge through training measures (theoretical and practical); this must be documented.

The advantages of using hardened washers are:

• Defined friction surface during assembly.

• Defined unevenness in calculation and thus reduction of the scattering of the tightening torque, whereby a greater hexagon screw force can be achieved mathematically.

Fixed flange

• Steel, stainless

• Press connection made of stainless steel

• Model 2359XL: 64.0 to 108.0 mm

The correct assembly of flange connections requires parallel aligned flange blades without an offset centre that allow the sealing element to be inserted in the correct position without damage.

The gap (out-​of-​parallelism of the sealing surfaces) before tightening the hexagon screws is not critical if the permissible gap is not exceeded.

• The order in which the hexagon screws and nuts are tightened has a significant influence on the force distribution acting on the seal (surface pressure). Incorrect tightening leads to a high dispersion of the pretensioning forces and can result in the required minimum surface pressure not being reached and even in leaks.

• After tightening the nut, at least two but no more than five threads should protrude from the end of the hexagon screw.

Before starting to disassemble an existing flange connection, get approval and a work permit from the responsible company, if necessary, observing the following:

• The system section must be depressurised and completely flushed.

• Secure built-​in or attached parts that are not held separately before loosening the flange connection. This also applies to fastening systems such as spring hangers and supports.

• Start loosening hexagon screws or nuts on the side facing away from the body, loosen the remaining hexagon screws slightly and only disassemble completely when you have ensured that the piping system does not present a risk. If a pipeline is under tension, there is a risk of the pipeline rupturing.

• Loosen the hexagon screws or nuts crosswise in at least two passes.

• Close open ends of strands with dummy plugs.

• Transport disassembled pipelines only in closed condition.

• When replacing seals, make sure to remove the old seal completely from the flange sealing surface without damaging the flange sealing surface.

The installer must perform a leakage test before commissioning.

Carry out this test on a system that is finished but not covered yet.

Observe the applicable regulations, see Regulations from section: Leakage test .

The leakage test pursuant to the applicable regulations must also be carried out for non-​potable water installations, see Regulations from section: Leakage test .

Document the result.