Max Machinery G Series, Руководство пользователя

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G-Series User Manual Rev2020A 4
Mechanical - Operation
Determine that the following parameters of your flow metering system are within the specifications for the specific
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 specifications page 8)
If the metered fluid is greater than 28°C (80°F) over ambient, see the “High Temperature Start Up” section below.
With valves (#1) and (#2) closed, slowly open valve (#3) (bypass) to clear the lines of foreign particles and air.
Slowly open the inlet valve (#1). 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 82°C (150°F) based on 21°C (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 (inches) x (operating temperature (°F)-125)
10
— OR —
TIME (minutes) = connector size (inches) x (operating temperature (°C)-52)
10
Valves (#1) and (#2) must be closed. Open the bypass valve (#3) in gradual steps until the bypass piping is stabilized at
operating temperature. Open valve (#1) slightly and allow the temperature to stabilize around the flow meter. Valve (#1)
can then be opened completely.
Open valve (#2) 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 (#2) can be gradually opened all the way. Slowly close the
bypass valve (#3).