Max Machinery 243 Helical Flow Meter - Manual (Page 13)

Max Machinery, Inc. 240 Series User Manual © Copyright 2013 Rev. 002Q4 13
Operation
Determine that the following parameters of your flow metering system
are within specifications for the specific 240 Series Meter being used:
Maximum System Pressure (Specifications)
Differential Pressure across meter (Pressure Drop Curves)
Maximum Flow Rate (Pressure Drop Curves)
Metered Fluid Temperature (Sales specification, transmitter manual)
If the metered fluid is greater than 80°F (28°C) over ambient, see the “High Temperature Start Up” section.
With valves one and two closed, slowly open valve three (bypass) to clear the lines of foreign
particles and air. Slowly open the inlet valve (# l). Slowly open the outlet valve (# 2). Completely close the bypass valve.
No routine maintenance, cleaning, or lubrication of the flow meter is required. A routine
filter cleaning schedule should be established. The system should be shut down if abnormal
noises occur or if unusual differential pressures across the meter are encountered.
High Temperature Start Up: For fluids above 150°F (82°C) based on 70°F ambient, a special
procedure is required to prevent thermal shock and permanent damage to the flow meter.
The warm up time is determined by the equation below:
TIME (minutes) = connector size (in inches) x (operating temperature (F) -125)
10
—OR—
TIME (minutes) = connector size (in inches) x (operating temperature (C) -52)
10
Valves one and two must be closed. Open the bypass valve (# 3) in gradual steps until the bypass piping is stabilized at
operating temperature. Open valve one slightly and allow the temperature to stabilize around the flow meter. Valve one
can then be opened completely. Open valve two slightly. The flow meter may make unusual noises or bind at this point.
Leave the valve at this setting until normal meter operation occurs, at which point valve two can be gradually opened all
the way. Slowly close the bypass valve (# 3).