Max Machinery, Inc. G-Series User Manual © Copyright 2018
Rev2018A
7
Installation
Prior to installing the flow meter, remove the storage caps from the ports and look carefully into each port of the meter.
Ensure that no dirt or foreign particles have gotten into the ports of the meter. Make sure that adequate filtration
exists upstream of the flow meter and that no contaminants exist in the line between the filter and flow meter. It is
recommended that the flow meter be connected to the circuit by means of unions close to the flow meter to allow easy
removal.
A by-pass valve should be installed between the inlet and outlet ports in parallel to the flow meter to allow flow through
the system in the event that the flow meter becomes blocked by foreign material.
The preferred orientation for the meter is to place the transmitter to the side of the flow meter. Such an installation
ensures that bubbles will not accumulate within the meter. In a high pressure installation, the compression and
expansion of gas bubbles from the bearing pockets may create undesirable side forces on the gears. Mounting the
meter with the transmitter to the side will purge the air from the meter. This orientation is also preferred as it reduces
the amount of heat that rises from the meter into the transmitter circuitry.
The following items and conditions should be considered:
Line and Bypass Valves: These valves allow filter cleaning or flow meter removal without completely shutting the system
down and draining the lines. They also allow system start up under conditions which could damage the meter; such as:
air in the lines, high temperature materials, or initial line surges.
Filtration: Clearances between the gears and internal wall are typically 0.001” to 0.002”. Any dirt present in the system
can jam or damage the unit. A 10 micron filter (such as a Max 381 Series stainless steel unit) is generally recommended,
although materials with very high viscosities may require a coarser filter. For bidirectional flow applications, use a filter
on each side of the flow meter. Materials with fibrous or non abrasive particulate matter may have to be run without
filters. Follow the recommendation of your Max Sales Engineer or consult our Technical Service Department.
Inlet and Outlet Ports: Use the “IN” port as the inlet for the most predominant flow direction. Install the flow meter on
the discharge side of the pump whenever possible. Excessive vibration at the meter should be avoided.
High Temperatures: Mount the meter so that the transmitter is below or to the side of the meter. This minimizes heat
transfer by convection from the flow meter to the transmitter. The transmitter is the most heat sensitive element in the
system and the transmitter manual should be consulted for specific limits. An optional fluid heater block can be used
on the flow meter to keep it at operating temperature during standby conditions. For substances that are solid at room
temperature, the block may be required to keep the material molten and flowing through the meter.
Clean Plumbing: Before installing the flow meter, clean the inside of the pipe line with compressed air or steam
(especially when using new pipe). Don’t use water, steam, or compressed air on the meter itself!
