Figure 3. 1 Nutating Disc with R-10 register

Transcription

1 Principle of Operation Liquid enters a precision-machined chamber containing a disc which nutates (wobbles). The position of the disc divides the chamber into compartments containing an exact volume. Liquid pressure drives the disc to wobble and a roller cam causes the nutating disc to make a complete cycle. The compartments are filled and emptied each cycle. The movements of the disc are transmitted by a gear train to a register/totalizer or pulse transmitter. Close clearances between the disc and chamber ensure minimum leakage for accurate and repeatable measurement of each volume cycle. Figure Figure. Nutating Disc with R- transmitter Figure. Nutating Disc with R-0 register Figure. Nutating Disc with R- register Accessories - Rate of flow indicators - Totalizers - Transmitters - Batch controllers Benefits Exceptional Value Saves Space Fluid Compatibility Eliminates upstream and downstream straight run piping requirements Power not required for mechanical version Very compact size Various s of construction makes flowmeter compatible with broad range of fluids (8) 7-7 (800) Fax: (8) niagarasales@venturemeas.com

2 Technical Information Functional Specifications Fluid Types Liquid Maximum Pressure See Table Fluid Temperature See Table Registration U.S. gallons, lbs., Imperial gallons, Liters, etc. Outputs Mechanical totalizing, mechanical batching, electro-mechanical totalizing, electromechanical batching, and blind electronic pulse registers available. See Registers section beginning on page. Performance Specifications Accuracy +.% of rate over flow ranges of Table - std. + 0.% of rate available (consult factory) Repeatability + 0.% of rate Flow Turndown Ratio See Table Agency Approvals UL and CSA Class Div Group D Display and Totalizer Available Physical Specifications Materials of Construction (see Table ) Case Bronze or Teflon coated Cast Iron Chamber Material Bronze, Ni-resist, or Disc Ryton Ball Ryton or carbon Seal Nitrile or Teflon with chamber Gears Bronze or with chamber Register Housing Plastic, Bronze, Aluminum - See section beginning on page Connections & Mountings Mounting Position Horizontal Ensure meter remains full with register up. Typical Straight Pipe Requirements Upstream 0 x D Downstream 0 x D Process Connections MNPT Electrical Connection Only for optional electronic transmitter (8) 7-7 (800) Fax: (8) niagarasales@venturemeas.com

3 Flow Rate Group Group Group Group Group Group Group Up to 0 U (.0 to.00 centipoise) to 0 U ( to 90 centipoise) 0 to,000 U (90 to 0 centipoise),000 to,000 U (0 to,00 centipoise),00 to 0,000 U (,00 to,00 centipoise) 0,000 to 0,000 U (,00 to,000 centipoise) Table Flow Ranges Minimum and maximum flow rates in gpm to achieve accuracy Flow Rate Group (flow rates in GPM) High Pressure Teflon Coated Bronze Bronze Teflon Coated Cast Iron with with with Cast Iron with Mechanical Mechanical Magnetic Magnetic Drive Drive Drive Drive ¾ MNPT ¾ MNPT ¾ MNPT MNPT MNPT MNPT ¼ MNPT ½ MNPT ½ MNPT MNPT MNPT ½ MNPT Table Bronze - Case Material Chamber Materials Bronze Standard Drive Magnetic Mechanical Size ¾ ½ Temp. & Pressure 00 o F (in psi) 00 o F o F 9 00 o F End Connections MNPT MNPT MNPT MNPT Teflon Coated Cast Iron - Case Material Chamber Materials Bronze Standard Ni-resist (opt.) Stainless steel(opt.) Size ¾ ¼ ½ ½ ¼ ½ Temp. & Pressure 00 o F (in psi) 00 o F o F 0 00 o F End Connections MNPT MNPT MNPT MNPT MNPT MNPT MNPT MNPT MNPT Teflon Coated Cast Iron - Case Material High Pressure Ink Meter Chamber Materials Bronze Size Temp. & Pressure 0 O F 000 (in psi) Standard w/r-8 register End Connections MNPT Table (8) 7-7 (800) Fax: (8) niagarasales@venturemeas.com

4 Ordering Information Please provide completed application data sheet (found at to allow us to confirm selection.. Confirm fluid viscosity at process temperature and select Group category from Table and Table.. Confirm minimum and maximum flow ranges to maintain stated accuracy for Group category from Table are within your requirements.. Move horizontally across the row of Table until you reach desired case s of construction compatible with process fluid. See Table for additional information.. Select line size identified from # above.. Select s of construction for case, chamber, disc and ball using Table and Table.. Confirm maximum pressure capability of meter at process temperature per Table. Confirm pressure drop across the meter using Figure does not exceed system requirements. 7. Select drive type from Table. 8. Select Register/Transmitter from Table on next page. 9. Specify Register/Transmitter units of measure (gallons, pounds, liters, etc.) Model # N Line Size Case Material and Mounting Connections BR N...Bronze MNPT (0.7 &.0 ) BR N...Bronze MNPT (. &.0 ) HI N...Teflon coated cast HP ink MNPT ( only) IR N...Teflon coated cast MNPT Chamber Material BR...Bronze - Standard on all meters...stainless Steel - opt. on Teflon coated cast case ( ) NR...Ni-Resist - (. only)...stainless Steel - opt. on Teflon coated cast case (. ) Disc and Ball...Ryton /Ryton...Ryton /Carbon (required with stainless steel chamber) Drive Type A...Magnetic; ¾ and high pressure Iron (HI) only E...Mechanical (8) 7-7 (800) Fax: (8) niagarasales@venturemeas.com

5 Registers/Transmitters Flowmeter Case Material Teflon Coated Cast Iron Bronze Flowmeter Size R-0 Horizontal, mechanical, non-resettable total R- Blind transmitter with dry contact closure R-A Horizontal, mechanical, non-resettable total R-B Horizontal, mechanical w/ transmitter, non-resettable total with contact closure R-0 Vertical, mechanical non-resettable with dial R-A Vertical, mechanical totalizer and resettable totalizer R-B Vertical, mechanical w/ transmitter, totalizer and resettable totalizer with contact closure R-C Vertical, mechanical w/ transmitter, totalizer and resettable totalizer with digital pulse, explosion proof R- Blind transmitter with digital pulse explosion proof R-0A Vertical, mechanical w/ transmitter, nonresettable total, dial, contact closure at batch R-0C Vertical, mechanical w/ transmitter, non-resettable total, dial, contact closure at zero point R-0D Vertical, mechanical w/ pulse transmitter, non-resettable total, dial, contact closure per unit R-C Vertical, mechanical w/ transmitter, non-resettable total, dial, contact closure at zero, explosion proof R- Mechanical batch controller with valve R- with valve R- with stainless steel valve Table Pressure Drops To find the pressure loss through a Niagara meter for a given application use the formula below. Pressure drop = (Step ) X (Step ) Step. Find your liquid s viscosity (U value)** on the horizontal scale in the graph (Fig.). Draw a vertical line up to the conversion line. From that point on the curve, draw a horizontal line over to the vertical scale. Step. Locate the meter size in the first column of the nomograph* at right. Then locate the meter flow rate in the second column. Draw a straight line through these two points and over to the third column. This point at which your line intersects the third column is the pressure loss through the meter when measuring water. Multiply the resulting viscosity pressure loss factor by the pressure loss obtained in the nomograph. This value is the approximate pressure loss for your application. *Based on average from test of stock Niagara meter when measuring water. **Consult factory for liquids above 0,000 U. Viscosity Pressure Loss Factor Step Approximate variation in pressure loss caused by viscosity variations constant flow rate Viscosity (Saybolt Seconds Universal - U) Figure Conversion Line (8) 7-7 (800) Fax: (8) niagarasales@venturemeas.com / -/ -/ / Step Nomograph

6 Material Selection Guide Liquid Flow rate group Case Chamber Disc/ball Alcohol (ethyl/methyl) Alcohol (denatured) Animal fat Asphalt (mastic) for sizes ½" up Brine (sodium) Bunker C oil Buttermilk (cattle feed) Calcium chloride 0% Casein Caustic soda Core oil Corn oil Corn syrup Creosote Cutting oil DDT solution Emulsion oil & water Ether Ethylene glycol Fish oil Fish solubles Fuel oil # & Fuel oil # & Fuel oil # & Gasoline Glue Glycerine Grease Kerosene Lacquer Lard (molten) Latex solution Liquid soap solution Malt syrup Methyl ethyl ketone (MEK) Liquid Flow rate group Case Chamber Disc/ball Mineral oil Mineral spirits Molasses (cold) Molasses (hot) Monochlorobenzol Naptha Oil (soluble cutting) Oleic acid (red oil) Paracol wax Paraffin (molten) Paint (oil base) Phenolic resin Printing ink Resin emulsion Resin polyester Resin size Rubber cement Soap Soap (resin) Sodium silicate Stoddard solvent Sugar cane juice Sugar (liquid) Thinners Toluene Trichlorethylene Turpentine Vanilla extract Varsol Vegetable fat or oil Water 00o F Water 00 to 80o F Water 80o F & above Water, gas, tar Wax emulsion Wax (hot) Whey Xylol (xylene) Table ND-A Rev. C 00 Venture Measurement 0/0 All rights reserved. All data subject to change without notice. (8) 7-7 (800) Fax: (8) niagarasales@venturemeas.com