INSTRUCTION MANUAL Model 220, 221 and 222 FLOW METERS TABLE OF CONTENTS Do s and Don ts...............................pg. 2 General Description............................Pg. 2 Applications.................................Pg. 3 Specifications................................Pg. 3 Installation...................................Pg. 4 Trouble Shooting..............................Pg. 5 Assembly Drawing............................Pg. 6, 7 Graphs: 220 Series Linearity.......................Pg. 8 220 Pressure Drop........................Pg. 9 221 Series Linearity.......................Pg. 10 221 Pressure Drop........................Pg. 11 222 Series Linearity.......................Pg. 12 222 Pressure Drop........................Pg. 13 MA 220-000-350 2004, Max Machinery, Inc. Max Machinery, Inc. reserves the right to make changes to the product in this Instruction Manual to improve performance, reliability, or manufacturability. Consequently, contact MMI for the latest available specifications and performance data. Although every effort has been made to ensure accuracy of the information contained in this Instruction Manual, MMI assumes no responsibility for inadvertent errors.
Do s & Don ts, General Description DO S & DON TS: DO: DO: DO: DO: GENERAL DESCRIPTION: Read entire manual before installation. If you need further information, contact MAX and ask for Flow Meter Technical Service. Install proper filtration immediately upstream of the flow meter. Install bypass plumbing around the flow meter. Use the bypass during start-up while flushing the system to (1) remove dirt by filtration and (2) bleed air and vapor from the system. Open the meter valves slowly on start-up to avoid overspeeding the meter with entrapped air. The bypass allows removal of the meter for service without disabling the system. Be very careful to keep all parts clean during installation or teardown. A little dirt on a fitting or in a line (from the floor, bench, etc.) looks like a truckload on a microscopic level. Any dirt introduced into the system between the filter and meter will not be filtered out. Run water or aqueous solutions not approved by MAX through your flow meter because of internal galling. Steam clean the meter (bypass or remove the meter if necessary). Blow down the meter with compressed air, gas, etc., because it will overspeed and possibly damage the meter. Turn on the pump in a system filled with material which is a solid at room temperature until the material has been melted completely. Use a bypass around the meter during start up. Apply excessive differential pressure across meter (see pressure drop curve safe zone) as it will cause internal parts to fail. Over pressurize the meter. Please refer to specifications for maximum operating pressure. Exceed the maximum flow rates specified (see performance curves) as it will cause internal parts to fail. MAX 220, 221 and 222 Series are positive displacement, high-pressure, gear type flow meters, similar in design to a conventional hydraulic motor. The flow of fluid through the meter turns a set of gears which drive a precision transmitter through a magnetic coupling. This generates an analog or pulse signal proportional to the volumetric flow rate. The flow range and pressure drop through the 220 Series Flow Meter depend upon the viscosity of the fluid to be metered. Normally, these flow meters are utilized on liquids having viscosities in excess of those recommended for turbine or variable area (rotameter) flow meter. Page 2 220-000-350 2004 Max Machinery, Inc.
Applications, Specifications APPLICATIONS: Although originally designed for the metering of rigid urethane foam components, the Model 220, 221 and 222 Flow Meters have found wide application in the following areas: Unsaturated polyester resins, especially in spray-up applications. Other non-corrosive chemicals and resins of high viscosity. Lubricating oils and other high viscosity petroleum products at low flow rates. Metering of silicone and tin catalyst components in flexible urethane foam production systems. Metering of pre-polymer and catalyst components for semirigid urethane foam crash-pad and other automotive trim component production. Other applications where conventional flow metering systems are affected by product viscosity or where the flow rate to be measured is below the minimum recommended flow of conventional positive displacement flow meters. High-pressure applications where conventional flow metering devices are not applicable. For applications outside the area of rigid and flexible urethane foams or petroleum products, it is recommended that the factory be consulted regarding the material to be metered for specific application assistance. SPECIFICATIONS: Maximum case pressure bar (psi) (standard) 105 (1,500) (high pressure) 210 (3,000) Filtration required (mesh minimum) 60 (mesh recommended) 80-100 Port Size, inches (standard) 272 Transmitter output 10 V F.S. 276 Transmitter output 4-20mA MODEL 220 MODEL 221 MODEL 222 1/2 NPTF (optional) 7/8-14 SAE 284 Transmitter output 10.97 pulses/cc 4.26 pulses/cc 2.11 pulses/cc Displacement (cc/revolution) 9.12 23.53 47.4 NOTE: Fluid acceleration should be limited to 75 liters per minute per second to prevent de-cou - pling the transmitter from the drive magnet. This limitation is due to the inertia of the transmitter magnet and rotor system and is an inherent characteristic of any magnetically coupled device. 220-000-350 2004 Max Machinery, Inc. Page 3
Installation INSTALLATION: Prior to installing the flow meter, determine that the gears turn freely by rotating them through the connection ports by means of plastic or fiber rod (do not use a steel rod to rotate gears due to hazards of scratching the sealing surface). 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 for maintenance. A by-pass valve should be installed between the inlet and outlet ports of the flow meter to allow flow through the system in the event that the flow meter should become blocked by foreign material. For the best low flow accuracy, the flow meter should be mounted with the transmitter tube in a horizontal position like the drawing indicates. Consult the transmitter manual for information on adjustment and utilization of the flow signal. See also manuals on any readout instrument purchased with the flow meter. Page 4 220-000-350 2004 Max Machinery, Inc.
Troubleshooting, Maintenance TROUBLESHOOTING: Problem Cause Solution Material will not pass Solid particle in Disassemble and remove through flow meter. gears or hardened particle or clean. material. Material flows through Solid particle in Disassemble and remove flow meter, but transmitter gears. particle. does not run and pressure drop is high. Material flows through Frozen or hard Warm flow meter or flow meter. Meter sounds material in magnet disassemble and clean. like it runs but trans- shield. mitter does not rotate. Flow meter operates, but Transmitter drive Straighten shaft and output is erratic. magnet drags on check end clearance. meter body. 220-000-350 2004 Max Machinery, Inc. Page 5
Dimensional Drawing 1000 PSI RATED VERSIONS 3.125 (79) 1.75 (45) Thermocouple and RTD 1/8 diameter probe hole with 1/16 NPTfitting See Below* 3/16 diameter probe hole with 1/8 NPTfitting 1/2 NPT 7/8-14 SAE (optional) *Model 220-3XX 3.35 (85) 221-3XX 4.12 (105) 222-3XX 5.34 (136) 4.0 (102) 4.0 (102) 4.75 (121) 2.75 (70) 3.5 (89) Page 6 220-000-350 2004 Max Machinery, Inc.
Dimensional Drawings 3000 PSI RATED VERSIONS REAM.375 & 1/4NPT HEATING PORT BOTH SIDES Standard NPT Connection 0.3 (7) 0.190 X 2 DEEP & 1/8 NPTTYP ON OTHERSIDE REAM.375 & 1/4NPT HEATING PORT BOTH SIDES 0.130 FOR THEMO COUPLING X 1-1/2 & 1/16 NPTTYPON OTHER SIDE.255 X 2 DEEP TYPON OTHER SIDE 1 1/8 (29) 5/16-18NC X 5/8 DEEP (2 LOCATION EACH SIDE) 4.00sq. (102) 2 1/8 (54) 2 1/8 (54) 1/2 NPT 7/8-14 SAE (OPTIONAL) 221-600-000 Bottom Model 220-6XX 3.85 (98) 221-6XX 4.62 (117) 222-6XX 5.84 (148) 5 sq. (127) 220-000-350 2004 Max Machinery, Inc. Page 7
220 Series Gear Flowmeters Linearity SERIES 220 LINEARITY: Typical Linearity (at various viscosities) (This Flowmeter is generally used for 100 CPS or greater viscosities.) Maximum Error: -5 cc/min. or 0.75% Typical Flowmeter Specifications Displacement: 9.12 cc/rev Pulses/CC with 284-XXX Transmitter: 10.97 Maximum Pressure: 1500 PSI standard 3000 PSI High Pressure Page 8 220-000-350 2004 Max Machinery, Inc.
220 Series Gear Flowmeters Pressure Drop SERIES 220 PRESSURE DROP: Delta P vs Flow Rate (at various viscosities) (This Flowmeter is generally used for 100 CPS or greater viscosities.) Typical Flowmeter Specifications Displacement: 9.12 cc/rev Pulses/CC with 284-XXX Transmitter: 10.97 Maximum Pressure: 1500 PSI standard 3000 PSI High Pressure *When used with Lubricating Hydrocarbons. 220-000-350 2004 Max Machinery, Inc. Page 9
221 Series Gear Flowmeters Linearity SERIES 221 LINEARITY: Typical Linearity (at various viscosities) (This Flowmeter is generally used for 100 CPS or greater viscosities.) Maximum Error: -7.5 cc/min. or 0.75% Typical Flowmeter Specifications Displacement: 23.5 cc/rev Pulses/CC with 284-XXX Transmitter: 4.26 Maximum Pressure: 1500 PSI standard 3000 PSI High Pressure Page 10 220-000-350 2004 Max Machinery, Inc.
221 Series Gear Flowmeters Pressure Drop SERIES 221 PRESSURE DROP: Delta P vs Flow Rate (at various viscosities) (This Flowmeter is generally used for 100 CPS or greater viscosities.) Typical Flowmeter Specifications Displacement: 23.5 cc/rev Pulses/CC with 284-XXX Transmitter: 4.26 Maximum Pressure: 1500 PSI standard 3000 PSI High Pressure 220-000-350 2004 Max Machinery, Inc. Page 11
222 Series Gear Flowmeters Linearity SERIES 222 LINEARITY: Typical Linearity (at various viscosities) (This Flowmeter is generally used for 100 CPS or greater viscosities.) Maximum Error: -10 cc/min. or 0.75% Typical Flowmeter Specifications Displacement: 47.4 cc/rev Pulses/CC with 284-XXX Transmitter: 2.11 Maximum Pressure: 1500 PSI standard 3000 PSI High Pressure Page 12 220-000-350 2004 Max Machinery, Inc.
222 Series Gear Flowmeters Pressure Drop SERIES 222 PRESSURE DROP: Delta P vs Flow Rate (at various viscosities) (This Flowmeter is generally used for 100 CPS or greater viscosities.) Typical Flowmeter Specifications Displacement: 47.4 cc/rev Pulses/CC with 284-XXX Transmitter: 2.11 Maximum Pressure: 1500 PSI standard 3000 PSI High Pressure 220-000-350 2004 Max Machinery, Inc. Page 13