INDIAN
SUPPLIER
SUPPLIER
Chem-Tech Associates
Category - Industrial Supplies
Chem- Tech Associates is one of the well known name in industrial supplier. We are domestic supplier, wholesaler and dealer of G25-G40 Diaphragm Meters. Through decades of knowledge in the field of commercial and insustrial diaphragm gas meters, our G25 and G40 meter sizes combine accuracy of measurement and long life in the field.
Operating Principle
The movement of the diaphragm is caused by the pressure difference between the inlet and the outlet of the meter. The reciprocal filling is controlled by means of 2 sliding valves.
This oscillating movement is transformed into a rotational one and is mechanically transmitted to the totaliser through a magnetic coupling or a stuffing box.
Description
A diaphragm meter is made of 4 main parts
> 1. The measuring unit mainly consisting in :
- 4 measuring chambers
- 2 Sliding valves
- an outlet pipe
> 2. A steel casing where 1 or 2 connectors are fitted
>3. A Magnetic Coupling or a stuffing box to transmit the movement of the measuring unit to the totalizer.
> 4. Totalizer to register the counted gas.
Application
The G25-G40 diaphragm meters are used for applications requiring high precision and large rangeability at low pressure ( below 1 bar gauge). Due to the volumetric principle of the diaphragm meter, its metrology is not influenced by installation conditions. The G 25-G 40 diaphragm meters are approved for fiscal use.
Features
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Flow rate |
G25: G40: |
Qmin 0.25m3/h- Qmax 40 m3/h Qmin 0.40m3/h- Qmax 65 m3/h |
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European Metrological Approval (71/318/EEC) |
G25: G40: |
D96/7.122.54 D91/7.122.51 |
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Metrology |
In accordance with the EU and OIML standards. In line with the EN 1359 standard, the tolerance of acceptation is +/-3 % from Qmin to 0.1 Qmax and + 1.5% from 0.1 Qmax to Qmax |
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Temperature Range |
Gas: Ambient: Storing temperature: |
-100C to + 500C +200C to + 600C -400C to + 600C |
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Maximum Pressure |
Welded version: Drawn version: |
0.5 bar 1 bar |
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Connections |
Single pipe or 2 pipe connections. From DN40 to DN80 depending on the G-size, vertical connections for the vertical or horizontal for the G40 Other connections available on request |
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Totalizer |
8-digit index with IP54 protection UV resistant Cover. Fitted with a reflecting disc on the first drum Prepared with a magnet in the first or second drum to allow the possibility for retrofitting an external Low Frequency transmitter. Upon customer request, the magnet can be fitted in the first drum (0.1 m3/Pulse) Customized name plate (Bar code, Logo, Customer serial number…) |
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Transmitters |
An external Low Frequency (LF) transmitter can be retrofitted without decommissioning the meter. Different versions are available |
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Cyclic Volume |
All the Cyclic volumes are large enough to ensure long term accuracy and reliability G25: 20 dm3 G40: 30 dm3 |
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Backrun Stop |
The whole range is equipped with a magnetic coupling, as standard. As an option, a stuffing box version is also available. |
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Casing Materials |
Steel sheet, drawn or welded depending on the G-size. The use of a powder- coated painting guarantees long term protection against corrosion. All the casings are of a screw type to allow easy maintenance on the meter-no crimped casing. |
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Magnetic Coupling Stuffing Box |
The meters are equipped with a magnetic coupling, as standard. As an option, a stuffing box version is also available. |
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High Temperature loading (HTL) |
The meter can be delivered, as an option, with HTL version PNO. 1. |
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Thermowell |
The whole range can be supplied with a thermowell as an electronic temperature converter. |
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Colour |
Light Grey RAL 7035 |
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