Bennett Pump Company

Transcription

1 Bennett Pump Company SB-100 Meters Operation, Service & Parts Manual Only Trained Personnel May Work on This Equipment For more information, please contact: Jim Biesecker, Component Sales 1218 E. Pontaluna Road Spring Lake, Michigan USA Tel: (USA) Tel: (International) Tel: (Sales) Fax: Read this Book For new books, visit out web page at: For Part Pricing, please visit the parts pricing section under the Literature Tab on our website. SB-100 Manual 1 Bennett 1218 E. Pontaluna Road Spring Lake, MI USA Outside USA sales@bennettpump.com

2 Table of Contents Introduction 3 Technical Specifications 3 Dimensions & Mounting 4 Theory of Operation 5 General Description 6 Features & Construction 6 Basic Concept 7 Accuracy & Calibration 8 Troubleshooting & Repair 9 Parts List 12 SB-100 Manual 2

3 Introduction The SB-100 meter is the standard product for Bennett Dispensers. It can drive mechanical and electronic computers at any flow used in a basic gasoline dispenser. The SB-100 meter is a precision device built to maintain.3% accuracy for flow rates from 1.5 GPM (5 LPM) to 26 GPM (100 LPM). The SB-100 is a volumetric meter employing four pistons with seals and associated chambers. During the first year of use, the SB-100 meter's calibration should be checked upon installation, after 90 days and after 180 days in order to insure accurate measurement. After the break-in period, semi-annual calibration checks are all that is required. It is a compact, lightweight unit built with the following main objectives: Excellent accuracy over a wide range of flows Approvals: USA - Weights & Measures, Underwriters Laboratories Canada - Weights & Measures, CSA Europe - OIML (International Organization for Legal Metrology) as a component in an approved system Very good durability of performance and life up to 2 million gallons (7,500,000 liters) under laboratory conditions Flexible mounting capability for layout in the dispenser: several product outlet positions Minimal numbers of internal components to assemble or repair Concept takes care of potential requirements for a meter: Adaptable to temperature compensation system Electronic calibration available Compatible with alternate fuels with up to 15% additives. Models available for higher fuel blends, contact factory for details. The positive displacement meter uses the general principle of four horizontal, single effect pistons equipped with "cup seals" moving in stainless steel sleeved cylinders and driving a vertical crankshaft. The crankshaft also of stainless steel is fitted with stainless steel connecting rod rollers and self lubricated bearings throughout for minimum friction and maximum corrosion resistance. The patented SB-100 meter, patent number , is compatible with the Bennett T-75 Pumping Unit and is used in all of our electronic and mechanical dispensers sold worldwide and offers advanced features. At Bennett we consider the meter the key to accurate product measurement and the fundamental source of information for the marketer s inventory systems. The SB-100 is designed to provide years of accurate and reliable service starting with the first liter! Volume per Revolution 1.5 liter gallon Outlet Shaft Diameter 10 mm in. Rotation Direction of Outlet Shaft (Top View Clockwise External Dimensions Horizontal Vertical (Including Drive) 200x220 mm 197 mm 7.87x8.66 in in. Cylinder Diameter 72.4 mm 2.85 in. Crankshaft Eccentricity mm in. Stroke (Pistons 1 & 4) Adjustable Between And mm mm in in. Minimum Mechanical Adjusting Device Increment 0.05% 0.05% Working Pressure 3.5 Bars 50 PSI Flow Rate Capacity Within +/- 0.3% Accuracy Minimum Flow Maximum Flow (Objective) Technical Specifications 5 lpm 100 lpm 1.3 gpm 26.4 gpm SB-100 Manual 3

4 Dimensions & Mounting 7.87 in (200 mm) 7.87 in. (200 mm) 8.66 in. (220 mm) 7.87 in (200 mm) 7.75 in. (197 mm) 7.75 in. (197 mm) WEIGHT: 4.7 kg (10 lbs) Electronic Calibration Mechanical Calibration Top View - Electronic Top View -Mechanical Side View - Mechanical Bottom View - Electronic Bottom View - Mechanical Back View Mechanical or Electronic Front/Side View - Electronic Front View -Mechanical SB-100 Manual 4

5 Theory of Operation The meter body (1) is cast aluminum with a gasketed flange at the base for rigid mounting with other components using four to six screws. The cylinder covers (2,3) are also cast aluminum with an O-ring seal and each is secured to the body by four screws. The calibrator cover (3) has a threaded shaft extending through it that limits the piston stroke to effect calibration. The shaft is sealed with an O-ring (NOTE: Electronic calibration meters do not have the calibrator cover (3). Fastened to the top of the meter body is a cast aluminum collector housing (4), which can be assembled in several outlet positions. An O- ring and four screws make the seal and connection. Extending through the top of the collector is the output of the crankshaft which is sealed against leakage by a lip seal (5) held in place by a retainer (6) and three screws. (Refer to Figure for numbers in parenthesis). Mechanical Meter Shown. SB-100 Manual 5

6 Features and Constructions The meter is a positive displacement, four piston device featuring a rotary distributor valve and "cup seal" pistons. Because of these features the meter shows superior accuracy and repeatability by eliminating internal product slippage. The composition of the "cup seal" piston is such as to provide long life and low calibration drift. The SB-100 Meter features improved linearity allowing the calibration to remain within tolerance from 1.3 gpm (5 Ipm) flow rate to 27 gpm (100 Ipm). Mechanical Calibration has been simplified by placing the calibration dial wheel on the piston cover face, out where it is easily accessible. The minimum mechanical calibration adjustment is 0.05%. Currently the standard SB-100 Meter is compatible with methanol/gasoline mixtures to 15% methanol. The SB-100 can be manufactured of materials which are compatible with M85 and 100% methanol. The SB-100 is fully compatible with MTBE (methyl tertiary butyl ether) additives to 15% concentrations. The SB-100 weighs only 10 pounds (4.7 kg) making service, installation and handling very easy. The SB-100 Meter is the result of seven years of product development. SB-100 Manual 6

7 Basic Concept The liquid to be measured enters the bottom part of the meter body (1) and pressure seals the rotating distributor (2) down on its mating surface through a diaphragm (3) and a countervalve (3). The pressure differential on the two sides of pistons 1 and 2 pulls the connecting rods (4) and makes the crankshaft (5) turn clockwise (top view). The crankshaft drives the distributor which changes the distribution of liquid; piston 2 and 3 become active, then 3 and 4 and finally 4 and 1 before the cycle starts again. Each cylinder is closed with cover (6), one of them being fitted with a calibrating device (7 mechanical only) that allows adjustment of the stroke of the corresponding piston to get the exact value of the volume per revolution dispensed by the meter. The crankshaft and connecting rods are supported by self lubricating bearings to minimize the wear and make the moving parts run smoothly. The crankshaft may drive a mechanical computer or an electronic pulser that can be fixed directly to the collector (8) which forms the upper part of the meter SB-100 Manual 7

8 Accuracy & Calibration The accompanying Meter Accuracy Curve is typical of the SB-100; 0.3% accuracy from 1.3 gpm (5 lpm) to 27 gpm (100 lpm). Calibration is achieved by adjustment of the dial and screw assembly on the cover attached to cylinder No. 1. A clockwise adjustment decreases delivery while counterclockwise increases delivery. Total adjustment is +/- 15 cubic inches (+/- 240 ml) in minimum increments of 0.05%. Once the meter is adjusted to zero, a pin is inserted through the dial and into the cover and wire sealed through a cross drilled hole in the pin. See Figure Tenths of 1% Deviation Based on metering gasoline with an approximate viscosity of 30 SSU Flow Rate (gpm) Typical Meter Accuracy Curve Figure 4 SB-100 Manual 8

9 Problem Cause Solution 1. Over delivery and out of tolerance difference between fast and slow delivery. Troubleshooting & Repair A. Dirty or gummed pistons and/ or piston chambers. B. Damage or worn piston seals. A. Remove cylinder covers. Remove screw holding piston to connecting rod. Using vise grips, secure the center hub of the piston and pull straight out. Clean piston seal and piston chamber using mineral spirits. Reassembly in reverse order. B. Replace all Pistons. Use piston repair kit KR Leakage at the output shaft. A. Top lip seal is damaged. A. Replace top lip seal s 3. Large over delivery amount. A. Damaged distributor and/or diaphragm. A. Use distributor/diaphragm kit KR Figure 4 SB-100 Manual 9

10 SB100 Mechanical Meter SB-100 Manual 10

11 SB100 Electronic Meter SB-100 Manual 11

12 SB100 Meter Parts List Item Part Number Description Comment 1 N/A Lead Seal Wire Please Call for details 2 N/A Universal Link Please Call for details 3 H Half Coupling Unthreaded See Kit List 4 H Half Coupling Threaded 5 H Screw 6 A Screw, Flat Head M X 8 mm 7 N Shaft Seal Retainer S Shaft Seal 9 A Screw, Hex Head M6-1.0 X 20 mm 9 N Screw, Hex Head M6-1.0 X 20 mm with Seal Hole 10 A O-Ring, Square Section 11 N Collector Cover Collector Cover High Alcohol 12 A O-Ring, Square Section 13 N Gasket Spring 15 A Screw, Fil Head M4-0.7 X 10 mm Stainless Steel 16 N Inner Diaphragm Retainer Diaphragm 18 N Gasket 19 N Counter Valve Counter Valve Assembly 21 N Outer Diaphragm Retainer 22 A Screw, Pan Head M5-0.8 X 12 mm Collector Cover Assembly Collector Cover Assembly High Alcohol 24 N Drive Pin 25 N Distributor 26 A Retaining Ring 27 A Washer Crankshaft Support Meter Body Assembly Meter Body Assembly High Alcohol 29 N Roller & Bearing Assembly 30 A Washer 31 A Lock Nut 32 N Crank Shaft Assembly Gallons 32 N Crank Shaft Assembly Liters 33 N Cylinder Cover Cylinder Cover High Alcohol 34 A O-Ring, Square Section 35 N Piston Screw, Hex Head With Nylon Patch (also use with High Alcohol) 36 N Piston Assembly Piston Assembly High Alcohol 37 N Connecting Rod Lower Rod 38 N Connecting Rod Upper Rod 39 A Retaining Ring 40 N Calibrating Cover Calibrating Cover High Alcohol O-Ring Also used with High Alcohol 42 N Calibrating Dial & Screw Assembly 43 N Seal Pin 44 N Calibration Cover Assembly Calibration Cover Assembly High Alcohol Gasket, Meter Inlet Not Shown 46 N902401S Valve Plate Not Shown 47 A Screw, Valve Plate Not Shown 48 A DU Bearing, Meter Body Not Shown, for meters built since N DU Bearing and Retainer, Meter Body Not Shown, for meters built before 1995 SB-100 Manual 12

13 Kit List Part Number Description Comment Kit, SB100, V'Plate/C'Valve Replacement Includes 1 each of items 8, 10, 12, 13, 14, 20, 25 & 46 KR Kit, SB-100 Piston Retail, 4 Per Includes 4 of items 34, 35, & 36, 1 each of 10 & Kit, SB-100 Piston Retail, Alcohol Meters Includes 4 of items 34, 35, & 36, 1 each of 10 & Kit, Crankshaft Bearing Replacement Includes 2 of item 29, 1 ea. of 10, 31 & Kit, Lower Hydraulic Gallon SB-100 Includes 4 of items 34, 35, & 36, 1 ea. of 8, 10, 12, 26, 32, 45 & Kit Lower Hydraulic Gallon SB-100 Alcohol Includes 4 of items 34, 35, & 36, 1 ea. of 8, 10, 12, 26, 32, 45 & Kit Lower Hydraulic Liter SB-100 Includes 4 of items 34, 35, & 36, 1 ea. of 8, 10, 12, 26, 32, 45 & Kit Lower Hydraulic Liter SB-100 Alcohol Includes 4 of items 34, 35, & 36, 1 ea. of 8, 10, 12, 26, 32, 45 & 48 KR Kit, SB-100 Diaphragm/Distributor Includes 4 of item 15, 1 ea. of 8, 10, 12, 13, 14, 17, 25 & Kit, SB-100 Meter Coupling Includes items 3, 4 & Kit, Tools for Du Bearing Replacement Field Du Bearing Install/Removal Tool These two kits are for SB100 meters built since 1995 KR Kit, SB-100 Meter, Crankshaft, Gallons Includes 4 of item 34, 1 ea. of 8, 10, 12, 26, 32, 45 & 48 KR Kit, SB-100 Meter, Crankshaft, Liters Includes 4 of item 34, 1 ea. of 8, 10, 12, 26, 32, 45 & 48 These two kits are for SB100 meters built before 1995 KR Kit, SB-100 Meter, Crankshaft, Gallons Includes 4 of item 34, 1 ea. of 8, 10, 12, 26, 32, 45 & 49 KR Kit, SB-100 Meter, Crankshaft, Liters Includes 4 of item 34, 1 ea. of 8, 10, 12, 26, 32, 45 & 49 SB-100 Manual 13

14 SB-100 Manual 14 Bennett 1218 E. Pontaluna Road Spring Lake, MI USA Outside USA