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3

EN

1.0 - GENERAL INFORMATION

This manual shows you how to safely install, operate and use the device.
The instructions for use 

ALWAYS

 need to be available in the facility where the device is installed.

ATTENTION: installation/maintenance needs to be carried out by qualified staff (as explained in 

section 1.3) by using suitable personal protective equipment (PPE).

For any information pertaining to installation/maintenance or in case of problems that cannot be solved with the instructions, 

contact the manufacturer at the address and phone numbers provided on the last page.

1.1 - DESCRIPTION

Device which supplies a preset and constant “downstream” pressure value (Pa) (within the intended operating limits) according 

to variations in the inlet pressure (Pe) and/or the flow rate (Q). The compensated obturator ensures precision when adjusting 

the outlet pressure (Pa) even with high and sudden variations in the inlet pressure. 

These regulators are used in both civil and industrial installations where natural gas, LPG or other non-corrosive gases (dry 

gases) are used. 

Reference standards:  EN 13611.

They can be equipped with the following safety devices and accessories according to the system requirements:

•  relief valve: 

discharges small gas flows outwards if overpressure occurs downstream of the regulator. This discharge 

can be conveyed outwards if the installation is in a poorly ventilated environment. They can also be supplied without the 

relief valve.

•  outlet pressure socket.

1.2 - KEY TO SYMBOLS

ATTENTION: 

Attention 

is drawn to the technical 

details intended for 

qualified staff.

DANGER:

 In the event of 

inobservance, this may cause 

damage to tangible goods, to people 

and/or pets.

DANGER:

 In the event 

of inobservance, this may 

cause damage to tangible 

goods.

1.3 - QUALIFIED STAFF

These are people who:

• Are familiar with product installation, assembly, start-up and maintenance;

• Know the regulations in force in the region or country pertaining to installation and safety;

• Have first-aid training.

 1.4 - USING NON-ORIGINAL SPARE PARTS

• To perform maintenance or replace spare parts (e.g. spring, filter element, etc.) 

ONLY

 manufacturer-recommended parts 

can be used. Using different parts not only voids the product warranty, it could compromise correct device operation.

• The manufacturer is not liable for malfunctions caused by unauthorised tampering or use of non-original spare parts.

 1.5 - IMPROPER USE

• The product must only be used for the purpose it was built for. 

• It is not allowed to use fluids other than those expressly stated.

• The technical data provided on the rating plate must not, under any circumstances, be exceeded. The end user or installer is in 

charge of implementing correct systems to protect the device, which prevent the maximum pressure indicated on the rating plate 

from being exceeded.

• The manufacturer is not responsible for any damage caused by improper use of the device.

Summary of Contents for FRG/2MCS9

Page 1: ...GAS PRESSURE REGULATOR FRG RG 2MCS9 Pe 0 5 9 bar DN15 DN 20 DN 25 EN...

Page 2: ...2 EN INDEX pag English 3 Drawings 10 Flow data table 1 13 Dimensions table 2 14 Regulation spring data table 3 15...

Page 3: ...if the installation is in a poorly ventilated environment They can also be supplied without the relief valve outlet pressure socket 1 2 KEY TO SYMBOLS ATTENTION Attention is drawn to the technical det...

Page 4: ...ion RG 2MCS9 Pressure regulator without filter Standard version 3 0 COMMISSIONING THE DEVICE 3 1 OPERATIONS PRIOR TO INSTALLATION It is necessary to close the gas upstream of the device prior to insta...

Page 5: ...to prevent damage to the flanges during tightening When tightening be careful not to pinch or damage the gasket Tighten the nuts or bolts gradually in a cross pattern see the example at the side Tight...

Page 6: ...2 EC In particularly critical installation conditions unattended areas poor maintenance or poor ventilation and especially if there are potential sources of ignition and or hazardous equipment near th...

Page 7: ...ator Open the downstream shut off valve very slowly Check the operation of the regulator 5 0 CALIBRATION Before carrying out the operations make sure that the supplied spring s is are suitable for the...

Page 8: ...NG PROPERLY Start the system as described in point 4 0 Slowly close the valve downstream of the regulator Loosen and remove the cap 1 Use an 8 mm socket spanner to press the adjustment nut 20 to incre...

Page 9: ...Manufacturer s name logo and address possible distributor name logo Mod name model of the device followed by the connection diameter PS Allowable pressure Pe Inlet pressure range that product operatio...

Page 10: ...10 EN fig 1 FRG 2MCS9 RG 2MCS9 8mm For relief valve setting Top part of the regulator with relief valve G 1 4...

Page 11: ...11 EN fig 2 FRG 2MCS9 RG 2MCS9 DN 15 DN 20 DN 25 Top part of the regulator with or without relief valve RG FRG 2MCS9 Required tool for setting Pa with relief without relief 13mm...

Page 12: ...ng screws 7 Compensation diaphragm 8 Filter element only on FRG 9 Bottom 10 Bottom fastening screws 11 Centre pin 12 Obturator 13 Bottom sealing O Ring 14 Body 15 Pressure test nipple optional 16 Flan...

Page 13: ...00 200 160 2 270 340 370 340 340 50 50 2 5 80 100 3 300 300 300 300 300 90 105 150 4 300 300 300 300 300 115 150 230 5 300 300 300 300 300 140 190 290 6 300 300 300 300 300 220 320 320 7 300 300 300 3...

Page 14: ...ble 2 Overall dimensions in mm RG FRG 2MCS9 Threaded connections Flanged connections A B C DN 15 DN 20 DN 25 120 194 140 DN 25 191 225 140 The dimensions are provided as a guideline they are not bindi...

Page 15: ...900 MO 2550 4x29x98x8 900 1500 MO 1305 3 5x29 8x98x11 5 1400 2000 MO 2550 4x29x98x8 1800 3600 MO 2590 4 5x29 5x94x10 DIFFERENTIAL RELIEF VALVE SPRINGS 40 200 MO 2155 2x17x29x6 200 800 MO 2155 2x17x29x...

Page 16: ...oratello 5 6 7 37045 Z A I Legnago VR Italy Unit locale Via M Hack 1 3 5 37045 Z A I Legnago VR Italy Tel 39 0442 23289 Fax 39 0442 27821 http www madas it e mail info madas it We reserve the right to...

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