What are the critical applications of the Model P Single Flow Tube Meter?
It is ideal for low-flow measurement applications, such as carrier gas metering in chromatography, controlling gas flows in manufacturing applications, and measuring liquids and gases in laboratory and pilot plants.
What is the difference between direct reading scales and universal millimetre scales?
Direct reading scales show flow rates in specific engineering units, such as mL/min or scfh, for a particular gas or liquid at set conditions. Universal millimetre scales require correlation with flow tables and are versatile. They allow the meter to measure various fluids under different pressures and temperatures, which is particularly useful in laboratory applications.
What are the accuracies for Model P Flow Meter?
The standard resolution is ±2% full scale for mm scales (except in specific tubes) and ±5% for direct reading scales. Calibration improves resolution to ±1% of full scale.
Are there different valve options available for this flow meter?
The Model P provides choices such as CV™ needle valves, MFV™ high-precision metering valves, or no valves. MFV™ valves are best suited for applications that are highly sensitive and require exact control, particularly in low flow rates.
What are the maximum operating pressure and temperature for this meter?
The Model P Single Flow Tube Meter is supplied with a maximum pressure of 200 psig (13.8 bars) and a maximum temperature of 250°F (121°C).
Confirm Compatibility of Materials: Ensure the materials used in the meter—such as borosilicate glass flow tubes, stainless steel or carboloy floats, and various O-rings—are compatible with the fluids to be measured.
Use Appropriate Valve Positioning: For gas metering, position inlet valves at the bottom, and for liquids, either one may be positioned at the inlet or outlet (top). Valves must be located at the outlet to ensure proper flow control for vacuum services.
Avoid Operation Beyond Maximum Specifications: Do not exceed the rated maximum pressure of 200 psig or the temperature limit of 250°F, as doing so can damage this meter and adversely affect its measurement.
Handle glass flow tubes with care: Borosilicate glass flows and breaks easily. So, care needs to be exercised while designing and installing to avoid any negative impacts or pressure tolerance in this regard.
Verify Scale Type for Correct Readings: Determine if the meter takes a direct reading or a universal scale. Using flow tables or calibration data for universal scales, determine correct readings and their applications.
