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DB22
User Manual
18 pgs885.81 Kb0

Finish Thompson DB22 User Manual

DB22 SERIES
ASSEMBLY, INSTALLATION AND
OPERATION MANUAL
Literature ID No. FT08-1023H
2
TABLE OF CONTENTS
Description Page Number
DB22 Capabilities
Maximum Working Pressure ........................................................................................... 6
Maximum Temperature................................................................................................... 6
Minimum Flow Rate .......................................................................................................6
Maximum Motor Power ..................................................................................................6
Maximum Specific Gravity .............................................................................................. 6
Section III - Start-up and Operation
Flush Systems ................................................................................................................ 9
Optional Drain installation ...............................................................................................9
Section IV - Maintenance
Outer Drive Replacement ................................................................................................10
Thrust Ring Replacement ...............................................................................................10
Bushing Replacement .....................................................................................................11
Impeller Replacement .....................................................................................................11
Reassembly.................................................................................................................... 11
DB22 Part Number Explanation ......................................................................................12
DB22 Exploded View Parts Diagram ................................................................................ 13
Spare Parts List ............................................................................................................ 14-17
Troubleshooting .............................................................................................................. 18
Section V - Warranty ............................................................................................................ 18
Note: Maintenance videos are now available on line at www.finishthompson.com.
For factory assistance with repairs or maintenance, call 1-800-888-3743.
3
Model Number and Serial Number
Record the model number and serial number below for future reference. This is important information when ordering replacement parts or when technical assistance is required. The numbers are found on a label located on the motor adapter.
MODEL NUMBER ___________________________
SERIAL NUMBER __________________________
IMPORTANT NOTICE
U.S. Export Administration Regulations, pursuant to ECCN 2B350, prohibit the export or reexport to certain enumerated countries of sealless centrifugal pumps in which all wetted materials are constructed from fluoropolymers without first applying for and obtaining a license from the U.S. Bureau of Industry and Security (BIS). This affects all Finish Thompson magnetic-drive pumps constructed from PVDF or lined with ETFE. Please contact the BIS (www.bis.doc.gov) or Finish Thompson with questions regarding the Regulations or a list of the countries to which they apply.
Chemical Reaction Disclaimer
The user must exercise primary responsibility in selecting the product’s materials of construction, which are compatible with the fluid(s) that come(s) in contact with the product. The user may consult Finish Thompson, Inc. (manufacturer) and a manufacturer’s representative/distributor agent to seek a recommendation of the product’s material of construction that offers the optimum avail­able chemical compatibility.
However neither manufacturer nor agent shall be liable for product damage or failure, injuries, or any other damage or loss arising out of a reaction, interaction or any chemical effect that occurs between the materials of the product’s construction and fluids that come into contact with the product’s components.
Safety Precautions
WARNING: READ THIS MANUAL COMPLETELY BEFORE INSTALLING AND OPERATING THIS UNIT. FAILURE TO FOLLOW THESE
PRECAUTIONS CAN RESULT IN SERIOUS INJURY OR DEATH.
WARNING: Magnetic field hazard. This pump contains powerful magnets. Exposed magnets (pump not connected to motor) produce powerful magnetic fields. Individuals with cardiac pacemakers, implanted defibrillators, other electronic medical devices, metallic prosthetic heart valves, internal wound clips (from surgery), metallic prosthetic devices or sickle cell anemia must not handle or be in the proximity of the magnets contained inside the pump. Consult a health care provider for specific recommenda­tions before working with this pump.
WARNING: Magnetic force hazard. This pump should only be disassembled and assembled using the recommended procedures.
The magnetic attraction is powerful enough to rapidly pull the motor end and the wet end together. Do not place fingers between the mating surfaces of the motor and wet ends to avoid injuries. Keep the drive magnet and impeller assembly away from metal chips or particles, items with magnetic stripes like credit cards and magnetic computer media such as floppy discs and hard drives.
WARNING: Guidelines for pumping flammable or combustible liquids. Follow these guidelines when pumping flammable or combustible liquids with a DB Series pump:
1. You must use a PVDF pump. PVDF has conductive carbon fibers added which allow it to be grounded when installed in a prop­ erly grounded piping system or when a properly installed grounding strap is attached to a housing bolt. If PVDF is not compatible with the liquid, you should then consider an ETFE lined UC Series mag-drive pump.
2. You must select the non-sparking (Ns) bronze bump ring option. The non-sparking ring is pressed into the clamp ring or motor adapter and prevents sparking should the motor bearingsfail and the outer mag drive assembly runs out of round.
3. Select and FTI explosion-proof motor or provide your own explosion-proof motor.
Follow these guidelines when pumping non-flammable or non-combustible liquids in a hazardous area with a DB Series pump:
1. You must select the non- sparking (Ns) bronze bump ring option. The non-sparking ring is pressed into the clamp ring or motor adapter and prevents sparking should the motor bearingsfail and the outer mag drive assembly runs out of round.
2. Select and FTI explosion-proof motor or provide your own explosion-proof motor.
4
WARNING: Hot surfaces. This pump is capable of handling liquids with temperatures as high as 220º F (104º C). This may cause the outer areas of the pump to become hot as well and could cause burns.
WARNING: Rotating Parts. This pump has components that rotate while in operation. Follow local safety standards for locking out the motor from the power supply during maintenance or service.
WARNING: Chemical Hazard. This pump is used for transferring many types of potentially dangerous chemicals. Always wear protective clothing, eye protection and follow standard safety procedures when handling corrosive or personally harmful materials. Proper procedures should be followed for draining and decontaminating the pump before disassembly and inspection of the pump. There may be small quantities of chemicals present during inspection.
WARNING: Never run pump at less than minimum flow or with the discharge valve closed. This could lead to pump failure.
WARNING: The pump and associated components are heavy. Failure to properly support the pump during lifting and movement
could result in serious injury or damage to the pump and components.
CAUTION: This pump should never be started without liquid in the casing. If the pump has a PTFE, ceramic or silicon carbide bushing, IT CANNOT BE RUN DRY WITHOUT CAUSING DAMAGE TO THE PUMP. It is recommended that run dry protection be used. Optional electronic power monitors are available to help protect against run dry. However, the pump can operate without liquid in the housing if the pump has a carbon bushing. The exact length of time the pump can operate dry with a carbon bushing varies with operating conditions and environment.
CAUTION: Never start or operate with a closed suction valve.
WARNING: Operation without priming or against a closed discharge valve can result in high temperatures that can result in
injury or damage to pump components.
CAUTION: Always provide adequate NPSHa (net positive suction head available). It is recommended to provide at least 2 feet (61
cm) above the NPSHr (net positive suction head required).
CAUTION: If pump is used on variable speed drive, do not exceed the frequency for which the pump was designed (for exam­ple, if the pump is a 50 Hz model, do not exceed 50 Hz).
Safety Precautions for ATEX Pumps
CAUTION: Proper o-ring material must be chosen for the fluid being pumped. Improper material selection could lead to swelling
and be a possible source of leaks. This is the responsibility of the end user.
WARNING: The pump must be checked for leaks on a regular basis. If leaks are noticed, the pump must be repaired or replaced immediately.
WARNING: The pump must be cleaned on a regular basis to avoid dust buildup greater than 5 mm.
WARNING: ATEX pumps must use a power monitor, flow switch, pressure switch or similar device to help protect against run-
ning dry, closed discharge valve and decoupling. Any of these conditions could lead to a rise in surface temperature of the pump.
Temperature Classification
The surface temperature of DB Series pumps depends upon the temperature of the fluid that is being pumped. The following chart lists different fluid temperatures and the corresponding pump surface temperature.
Fluid Temperature Maximum Surface
Temperature
85º F (36º C) 136º F (58º C) T6 85º C
170º F (77º C) 178º F (81º C) T5 100º C
220º F (104º C) 203º F (95º C) T4 135º
Temperature
Class
Maximum Allowable
Surface Temperature
5
DB22 Capabilities
Maximum Working Pressure: 90psi (6.2 bar)
Maximum Temperature: Polypropylene -180º F (82º C); PVDF – 220º F (104º C)
NOTE: Maximum temperature is application dependent. Consult a chemical resistance guide
or the chemical manufacturer for chemical compatibility and temperature limits.
Solids: Maximum particle size is 100 microns for slurries and 1/64” (.4 mm) for occasional solids. Maximum hardness is 80 HS. Maximum concentration is 10% by weight.
NOTE: If solids are being pumped, it is recommended that the pump have silicon carbide components for best results. Pumping solids may lead to increased wear.
Minimum Allowable Flow Rate - Do not allow the flow rate to drop below 10 gallons per minute (2.3 m3/hr).
Maximum Noise Level: 80 dBA
Maximum Allowable Motor Power
Do not exceed 7.5 kW (10 horsepower) for 50 Hz, 2900 rpm applications. For 60 Hz, 3450 rpm applications, the pump is capable of starting a 15 horsepower motor but is limited to a maximum of 13 horsepower (9.7 kW) while running. Use the information in the chart below to determine the maximum specific gravity capabilities by impeller trim for non-overloading applications. The use of a power monitor is strongly recommended for 60 Hz applications above 10 horsepower (7.5 kW).
Maximum Specific Gravity for Non-Overloading Applications
3450 rpm (60 Hz)
Closed Impeller
Diameter
7.25” (184.2 mm) 1.0
7” (177.8 mm) 1.1
6.5” (165.1 mm) 1.5
6” (152.4 mm) 1.8
5.5” (139.7 mm) 1.8
5” (127.0 mm) 1.8
4.5” (114.0 mm) 1.8
3450 rpm (60 Hz)
Open Impeller
Diameter
6” (152.4 mm) 1.5
5.5” (139.7 mm) 1.8
5” (127.0 mm) 1.8
4.5” (114.0 mm) 1.8
Maximum
Specific Gravity
Maximum
Specific Gravity
Closed Impeller
Diameter
184.2 mm (7.25”) 1.35
177.8 mm (7”) 1.6
165.1 mm (6.5”) 1.8
152.4 mm (6”) 1.8
139.7 mm (5.5”) 1.8
127.0 mm (5”) 1.8
Open Impeller
Diameter
181.0 mm (7.13”) 1.35
177.8 mm (7”) 1.5
165.1 mm (6.5”) 1.75
152.4 mm (6”) 1.8
139.7 mm (5.5”) 1.8
2900 rpm (50 Hz)
Maximum
Specific Gravity
2900 rpm (50 Hz)
Maximum Specific
Gravity
6
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