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                                          Advanced Specialty Gas Equipment

                                          VARIABLE AREA FLOWMETERS
                                          Series 50HC

                                          High Capacity, Flowmeters

                                          Series 50HC Flowmeter Series 50HC flowmeters offer an economical means of measuring gas or liquid flow at flow rates up to 15 standard cubic feet per minute (scfm) of air. Suitable for both plant and laboratory use, these flowmeters have an accuracy of ±10%. Each flowmeter consists of a replaceable glass metering tube with a Type 316 Stainless Steel float and float stops. Either chrome-plated brass or Type 316 Stainless Steel valves, end blocks and fittings are available. Tubes are calibrated with air and graduated directly in standard cubic feet per minute (scfm) at 70°F and 14.7 psia.

                                          Standard Features
                                          • Large Diameter Flow Tubes permit flows as high as 15 standard cubic feet per minute (scfm) of air.
                                          • Ribbed Tubes stabilize float and improve accuracy and readability.
                                          • Borosilicate Glass Tubes allow operating temperatures up to 200°F.
                                          • Brass or Stainless Steel Construction permits use in either corrosive or noncorrosive gas service.

                                           


                                          Specifications
                                          Maximum Operating Pressure and
                                            Temperature: 200 psig at 200°F

                                          Minimum Operating Temperature: 32°F

                                          Accuracy: ± 10% of full scale from 10%
                                             to 100% of range

                                          Repeatability: Within 0.5% of full scale

                                          Tube Graduations:
                                            Standard cubic feet per minute of Air  

                                          Scale Length: 75 mm

                                          Inlet and Outlet Connections:
                                            3/8" NPT female

                                          Approximate Weight: 2.5 lbs

                                          Materials of Construction
                                          Tube: Borosilicate Glass
                                          Float and Float Stops: Type 316 Stainless Steel
                                          End Blocks
                                          Inlet/Outlet Adaptors
                                          Side Plates: Aluminum
                                          Back Plate: White Plastic
                                          Front Plate: Clear Plastic
                                          Seals and Packing: Viton®
                                          Valve

                                          Table I, Series 50HC Flowmeter
                                          Part No. Metering Valve, End Blocks and
                                          Inlet/Outlet Adaptor Material
                                          FM4470-( ) Chrome-Plated Brass
                                          FM4480-( ) Type 316 Stainless Steel
                                          Where "( )" is indicated above, complete the part number by inserting applicable tube number from Table II.
                                          Example: FM4470-1 which has a flow range of 0.6 to 3.4 scfm. Order by complete part number.

                                          Table II, Tube Selection Table for Series 50HC Flowmeters

                                          Tube
                                          No.
                                          Air Flow Rate Range
                                          at 70°F and 14.7 psia
                                          1 0.6-3.4 scfm
                                          2 0.6-6.0 scfm
                                          3 1.2-12.0 scfm
                                          4 1.5-15.0 scfm
                                               Replacement Tubes
                                               Part No.
                                               FM4471
                                               FM4472
                                               FM4473
                                               FM4474

                                          Table III, Gas Conversion Factors for Series 50HC Flowmeters
                                          To select proper tube for gases other than Air, multiply flow rate values for Air given in Table II (above) by applicable conversion factor shown below. Then use these new flow rate values to select appropriate tube number.

                                          Gas Factor* Gas Factor*
                                          Acetylene 1.04 Helium 2.69
                                          Ammonia 1.30 Hydrogen 3.81
                                          Argon 0.85 Methane 1.35
                                          Butane 0.70 Neon 1.20
                                          Carbon Dioxide 0.81 Nitrogen 1.01
                                          Carbon Monoxide 1.01 Oxygen 0.95
                                          Ethane 0.98 Propane 0.80
                                          Ethylene 1.02 Sulfur Dioxide 0.66
                                          * Conversion factors are approximately equal to square root of the reciprocal of the specific gravity of the gas (√1/SG).
                                           

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