While oval gear flow meters provide exceptional accuracy, reliability and a cost effective solution, there are some considerations for their usage. For example they should not be used to measure fluids with particles or air pockets in them and adequate filtration needs to be installed upstream of the meter. Inside the meter are moving components, so as good practice a routine inspection may be required. The frequency of the inspection should be based on the operating conditions; these will include the maximum flow rate, viscosity and the fluids lubricating properties. If the meter is used with a lubricating fluid, such as oil, and is well within the maximum flow range, then the meter will operate of many years maintenance free.
1. It is recommended that when setting up pipe work for meter installations a bypass line be included in the design. This provides the facility for a meter to be removed for maintenance without interrupting production
2. Use thread sealant on all pipe threads.
3. For pump applications ensure pipe work has the appropriate working pressure rating to match the pressure output of the pump. Check specified Meter Technical Data section for further details.
4. Install a wire mesh strainer, Y or basket type as close as possible to the inlet side of the meter.
5. For M-series meters ensure that the meter is installed so that the flow of the liquid is in the direction of the arrows (if applicable) embossed on the meter body.
6. The meter can be installed in any orientation as long as the meter shafts are in a horizontal plane. (Refer to Figure 9 below for correct installation). The register assembly may be orientated to suit the individual. Note: Incorrect installation can cause premature wear of meter components.
7. Do not over-tighten meter connections. It is important that after initial installation you fill the line slowly, high speed air purge could cause damage to the rotors.
8. Test the system for leaks.
9. Check the strainer for swarf or foreign material after the first 1 hour of operation. Check the strainer for swarf or foreign material periodically, particularly if the flow rate decrease .