Profipress G gas flow monitor type M/K with SC-Contur
Product information
Profipress G gas flow monitor type M/K with SC‑Contur
for shutting off the flow of gas when the gas flow volume exceeds a prescribed value due to an unintended release of gas
| Year built (from): | 15.12.2008 |
Trade mark rights exist for this document, further information can be found at viega.com/legal .
Target groups
The information in this instruction manual is directed at the following groups of people:
contract installers registered in the installers' register of a utility company
professional specialist companies for the construction, maintenance and alteration of a natural or liquid gas system
Liquid gas systems may only be constructed, maintained or altered by companies that have the necessary qualification and experience.
It is not permitted for individuals without the abovementioned training or qualification to mount, install and, if required, service this product. This restriction does not extend to possible operating instructions.
The installation of Viega products must take place in accordance with the general rules of engineering and the Viega instructions for use.
Labelling of notes
Warning and advisory texts are set aside from the remainder of the text and are labelled with the relevant pictographs.
DANGER!
This symbol warns against possible life-threatening injury.
WARNING!
This symbol warns against possible serious injury.
CAUTION!
This symbol warns against possible injury.
NOTICE!
This symbol warns against possible damage to property.
INFO!
Notes give you additional helpful tips.
About this translated version
This instruction for use contains important information about the choice of product or system, assembly and commissioning as well as intended use and, if required, maintenance measures. The information about the products, their properties and application technology are based on the current standards in Europe (e. g. EN) and/or in Germany (e. g. DIN/DVGW).
Some passages in the text may refer to technical codes in Europe/Germany. These should serve as recommendations in the absence of corresponding national regulations. The pertinent national laws, standards, regulations and guidelines, as well as other technical guidelines, have priority over German/European guidelines in this manual: The information is not binding for other countries and territories and should, as mentioned, be considered as support.
Standards and regulations
The following standards and regulations apply:
Regulations | Scope / Notice |
Areas of use
DVGW-TRGI 2008 | Gas installations |
DVFG-TRF 2012 | Liquid gas systems |
Media
DVGW Worksheet G 260 | Gas quality |
Sealing elements
DVGW-VP 305‑1 | Scope for the operating temperature |
Threaded connection
DIN EN 10226‑1 | Threaded pair |
DIN 30660 | Permitted sealants |
DIN EN 751‑2 | Permitted sealants |
Marks on components
DVGW-VP 305‑1 | GFM sticker |
DIN EN 1213 | Noise class I |
Compatible components
DVGW Worksheet G 5614 | Pipes |
DVGW worksheet GW 392 | Copper pipes |
DIN EN 1057 | Copper pipes |
DVGW worksheet GW 541 | Stainless steel pipes |
DIN EN 10088 | Stainless steel pipes |
Operating mode
DVGW-VP 305‑1 | Gas flow monitor |
Technical data
DVGW-VP 305‑1 | Operating temperature |
Corrosion
DIN 30672 | |
DVGW-TRGI 2008, Point 5.2.7.1 | Outer pipes |
DVGW-TRGI 2008, Point 5.2.7.2 | Inner pipes |
DVFG-TRF 2012, Point 7.2.7.1 | Outer pipes |
DVFG-TRF 2012, Point 7.2.7.2 | Inner pipes |
Mounting instructions
DVGW-TRGI 2008 | Exceptions, selection criteria, and arrangement of the components |
DVFG-TRF 2012 | Exceptions, selection criteria, and arrangement of the components |
DVGW-TRGI 2008, Point 5.3.9 | Application of active and passive protection measures |
Leakage test
DVGW-TRGI 2008, Point 5.6 | |
DVFG-TRF 2012, Point 8 | Testing and initial commissioning of a liquid gas system |
Maintenance
DVGW-TRGI 2008 Appendix 5c | Operation and maintenance of gas installations |
Intended use
INFO!
The use of the model for areas of use and media other than those described must be approved by the Viega Service Center.
Areas of use
Use is possible in the following areas among others:
Gas installations
Liquid gas installations
For planning, execution, modification and operation of gas installations, observe the applicable regulations, see Standards and regulations .
Media
The model is also suitable for the following media, amongst others:
Gases, see Standards and regulations
Liquid gases, only in the gaseous state for domestic and commercial applications, see Standards and regulations .
Product description
Overview
The model is equipped as follows:
casing made of gunmetal
inlet side with R external thread
outlet side with Profipress G press connection with SC‑Contur
The model is available in the following dimensions:
DN | R | d | Volume flowGas [m3/h] |
|---|---|---|---|
25 | 1 | 28 | 2.5 |
25 | 1 | 28 | 4.0 |
25 | 1 | 28 | 6.0 |
32 | 1 ¼ | 35 | 6.0 |
32 | 1 ¼ | 35 | 10.0 |
Press connection with SC-Contur
The press connection has a circumferential bead in which the sealing element lies. The connector is deformed in front of and behind the bead and permanently connected to the pipe during pressing. The sealing element is not deformed during pressing.
SC‑Contur
Viega press connections are equipped with the SC‑Contur. The SC‑Contur is a safety technology that is certified by the DVGW and ensures that the connection is guaranteed to be leaky in an unpressed state. In this way, unpressed connections are noticed immediately during a leakage test.
Viega guarantees that unpressed connections are visible during a leakage test:
with dry leakage test in the pressure range from 22 hPa–0.3 MPa (22 mbar–3.0 bar)
Sealing elements
The press connection is factory-fitted with a yellow HNBR sealing element.
Use |
|---|
Operating temperature |
Operating pressure |
Gas installation | Liquid gas installation |
|---|---|
-20 °C up to +70 °C | -20 °C up to +70 °C |
≤ 0.5 MPa (5 bar) (MOP 5) ≤ 0.1 MPa (1 bar) (HTR / GT1)2) | ≤ 0.5 MPa (5 bar) (MOP 5)1) ≤ 0.1 MPa (1 bar) (HTR / GT1)2) |
| 1) | The maximum pressure equates the pick-up pressure of the SSV in the pressure regulating valve. |
| 2) | Operating pressure at HTR requirement max. 0.1 MPa (1 bar) (GT1). |
In accordance with the valid regulations, the scope of the operating temperature is between -20 °C and +60 °C, see Standards and regulations .
Threaded connection
Prerequisite for a threaded connection, which seals via a thread, is a threaded pair in accordance with applicable regulations, see Standards and regulations . Pursuant to these regulations, a permitted threaded pair comprises a conical external thread and a cylindrical internal thread, e. g. R ¾ and Rp ¾.
Only use commercially available and chloride-free, DVGW approved sealant in accordance with the applicable regulations to seal threads, see Standards and regulations .
INFO!
Establish the threaded connection first and the press connection next.
Markings on components
The press connection is marked with a coloured dot. This identifies the SC‑Contur, where the test medium would escape in the case of an inadvertently unpressed connection.
The press connection is marked as follows:
yellow dot and yellow rectangle for gas
MOP5 for maximum operating pressure 0.5 MPa (5 bar)
GT1 for operating pressure with HTR requirement 0.1 MPa (1 bar)
The gas flow monitor has a sticker. The sticker comprises the following mandatory technical data which is in compliance with the applicable regulations, also see Standards and regulations :
GFM nominal value V̇Gas (coloured marking)
Flow direction indicator
Nominal width in DN
GFM Type
DVGW writing
Operating pressure range
Installation position
The colour coding of the sticker is determined by the V̇Gas value of the gas flow monitor.
V̇Gas [m3/h] | Coloured marking |
|---|---|
2.5 | yellow |
4.0 | light brown |
6.0 | green |
10.0 | red |
Compatible components
The model is compatible with the following systems:
Profipress G
Sanpress Inox G
Profipress G gas flow monitors are equipped with press connections.
The press connections are tested and certified in accordance with applicable regulations with the following types of pipe, see Standards and regulations :
Copper pipes
Stainless steel pipes (material 1.4401)
INFO!
Profipress G gas fittings may only be connected to the Sanpress Inox stainless steel pipe (material 1.4401) up to dimension d 28.
From d 35 upwards, the model can be used in connection with the Profipress G piping system.
Please contact the Viega Service Center for questions on this subject.
Operating mode
Gas flow monitor (GFM)
A gas flow monitor is an active protective measure in a gas installation. A GFM interrupts the flow of gas if an unintended release of gas occurs.
The GFM is tested in accordance with the applicable directives, see
Standards and regulations
.
Below, the following unit symbols and denominations are used:
The GFM is fully open in normal operation. It is configured for the nominal volume flow.
The operating volume flow is stable. The Δp from p1 and p2 is constant.
In the case of a fault, there is a drop in the pressure in the following pipes so that the flow rate increases sharply. The shut-off flow is reached due to the pressure loss in the range p2. p1 presses against the valve plate and interrupts the flow.
overflowing gas
After the fault has been rectified, pressures p1 and p2 re-balance, by gas flowing from the overflow opening.
Overflow volume = 30 l/h with 100 MPa (100 mbar)
The valve plate opens with help from p2 and the spring force against p1.
The gas flow monitor is back in normal operation.
Technical data
Observe the following operating conditions for the installation of the model:
Installation position |
|---|
Design |
Operating pressure |
Operating temperature |
Pressure loss |
Shut-off flow |
Overflow opening |
horizontal, type K withfSmax 1.45 vertically upwards, type M, with fSmax 1.80 |
I |
15–100 hPa (15–100 mbar) |
-20 up to +70 °C |
Δp ≤ 0.5 hPa (0.5 mbar) |
Type K maximum 45% above Volume flowGas (fS≤ 1.45) Type K maximum 80% above Volume flowGas (fS≤ 1.80) |
≤ 30 l/h at 100 hPa (100 mbar) |
In accordance with the applicable regulations, the scope of the operating temperature is between -20 °C and max. +60 °C, see Standards and regulations .
Handling
Assembly information
Mounting instructions
Checking system components
System components may, in some cases, become damaged through transportation and storage.
Check all parts.
Replace damaged components.
Do not repair damaged components.
Contaminated components may not be installed.
Mounting conditions
Observe the following when mounting:
Only install gas flow monitors that are compatible with the device connected and the installation.
The excessive use of sealant can impair the function.
Do not cover or paint the model.
Use suitable tools.
Exceptions, selection criteria and the arrangement of the components are described in the applicable regulations, see Standards and regulations .
Installation position and shut-off flow
The model must be installed directly downstream from the main shut-off device (MSD). If a gas pressure regulating device is installed directly downstream from the MSD, the model must be installed directly downstream from the gas pressure regulating device.
When mounting the model, observe the flow direction indicator. The flow direction is shown on the coloured sticker.
The model can be installed horizontally or vertically facing upwards in the direction of flow.
INFO!
The model may not be installed vertically facing downwards.
You can determine the installation position of the model with the help of the following table.
Observe the shut-off flow when mounting the model.
Article No. |
|---|
Volume flowGas [m3/h] |
Shut-off flow [m3/h] with GFM type K (fSmax 1.45) |
Shut-off flow [m3/h] with GFM type K (fSmax 1.8) |
653 156 | 653 163 | 653 170 653 187 | 653 194 |
2.5 | 4 | 6 | 10 |
3.6 | 5.8 | 8.7 | 14.5 |
4.5 | 7.2 | 10.8 | 18 |
The shut-off flow with GFM type M/K depends on the installation position:
Horizontal installation position: see shut-off flow with GFM type K.
Vertical installation position: see shut-off flow with GFM type M.
Line compensation across the protectable length is only required with type M (here: horizontal installation).
NOTICE!
Use active and possibly passive protection measures to protect a gas installation from tampering by unauthorised persons.
Generally use active protective measures.
Choose passive protective measures matching the installation, and use them.
The use of active and passive protection measures is specified in the applicable regulations, see Standards and regulations .
Required tools
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
press jaw or press ring with corresponding adapter jaw, suitable for the pipe diameter and suitable profile
Recommended Viega press machines:
Pressgun 5
Pressgun Picco
Pressgun 4E / 4B
Picco
Type PT3-AH
Type PT3-H / EH
Type 2 (PT2)
Mounting
Shortening the pipes
NOTICE!
Leaky press connections due to damaged material
Press connections can become leaky due to damaged pipes or sealing elements.
Observe the following instructions to avoid damage to pipes and sealing elements:
Do not use cutting discs (angle grinders) or flame cutters when cutting to length.
Do not use grease or oils (e. g. cutting oil).
For information about tools, also see Required tools .
-
Cut the pipe properly using a pipe cutter or fine-toothed hacksaw.
Avoid grooves on the pipe surface.
Pressing the connection
NOTICE!
Leaky press connections due to pipes being too short
If two press connectors are to be mounted onto a pipe without an interval, the pipe must not be too short. If the pipe is not inserted up to the prescribed insertion depth in the press connector during pressing, the connection may become leaky.
With pipes with a diameter of d 15–28 mm, the length of the pipe must be at least as long as the total insertion depth of both press connectors.
Requirements:
The pipe end is not bent or damaged.
The pipe is deburred.
The correct sealing element is in the press connector.
HNBR = yellow
The sealing element is undamaged.
The complete sealing element is in the bead.
-
Push the press connector onto the pipe as far as it will go.
-
Mark the insertion depth.
-
Place the press jaw onto the press machine and push the retaining bolt in until it clicks into place.
INFO!Observe the press tool instruction manual.
-
Open the press jaw and place at a right-angle onto the connector.
-
Check the insertion depth using the marking.
-
Ensure that the press jaw is placed centrally on the bead of the press connector.
-
Carry out the pressing process.
-
Open and remove the press jaw.
-
Connection is pressed.
Leakage test
The installer must perform a leakage test before commissioning.
This test is carried out on a system that is finished but not yet covered.
Observe the applicable regulations, see Standards and regulations .
Document the result.
Maintenance
Gas installations must be given a visual inspection, e. g. by the owner, once a year.
Serviceability and leak tightness must be checked every twelve years by an installation contractor.
To be covered by the warranty and to ensure the safe operation of the gas installations, operate and maintain them as intended. For more detailed information, refer to the applicable regulations, see Standards and regulations .
Disposal
Separate the product and packaging materials (e. g. paper, metal, plastic or non-ferrous metals) and dispose of in accordance with valid national legal requirements.