Page 3 of 32
EQUIPMENT CATEGORY: The Macnaught oval gear flow meters are designed in category II 2 G according to
EN 60079-0 and EN 60079-11 for use in zone 1. The inside of the measuring unit is also approved for zone 1.
Macnaught declines any responsibility for the use of flow meters outside the designated Ex group, category and
zone.
The flow meters shall be rigorously used within the min-max rated temperature and pressure limits specified by
Macnaught. Failure to do so will result in high risk of explosion.
EU CONFORMITY: The manufacturer declares with the EU declaration of conformity on his own responsibility
conformity with the protection goals of directive 2014/34/EU for use in hazardous areas with gas. The EU
declaration of conformity for the equipment category II 2 G is based on the EU type technical file SIRA: SIRA
15XT063 Rev 4.
IMPORTANT INFORMATION (READ CAREFULLY)
POTENTIAL RISK OF EXPLOSION:
Do not run the flow meter in conditions that would cause overheating, damage and potentially create high risk of
explosion in hazardous area.
The flow meter must be protected from impact at all times: impact can cause mechanical sparking and result in
high risk of ignition/explosion
The flow meter external housing can made of Aluminium: contact between iron oxide (for example - rust iron) and
aluminium can cause sparks with high risk of ignition/explosion. Ensure no source of iron oxides are available
within the Ex zone where the flow meter is installed.
In the event a leakage on the flow meter is observed, process must be interrupted immediately and proper
maintenance carried out. Leakages could create dry run condition in the meter with resulting risk of ignition/
explosion.
FLUID COMPATIBILITY: Before use, confirm the fluid to be used is compatible with the meter. Refer to Industry
fluid compatibility charts or consult your local representative.
STRAINER: To prevent damage from dirt or foreign matter it is recommended that a Y or Basket type mesh
strainer be installed as close as possible to the inlet side of the meter.
• Meter 1/4” 74 micron / 200 mesh
• Meter 1/2”- 2” 250 micron / 60 mesh
• Meter 3”- 4” 420 micron / 40 mesh
When a strainer is installed it should be regularly inspected and cleaned. Failure to keep the strainer clean will
dramatically effect flow meter performance. Contact your local representative for advice.
AIR PURGE / LINE PRESSURE: To prevent damage caused by air purge, slowly fill the meter with fluid. To
reduce pressure build-up turn off the pump at the end of each day.
SAFETY BARRIER: Use appropriate safety barriers for outputs. Refer to below pages for Entity Parameters:
• Page 11 - Reed Switch
• Page 12 - ERX Display (Type Fx)
• Page 14 - ERAX Display (Type Gx)
• Page 16 - ERBX Display (Type Hx)
FLOWMETER USAGE: The flow meter Shall be used exclusively with fluids. No gases permitted to flow.
Presence of gases could create severe hazard and damage
To Next Page
Loading...
