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Summary of Contents for Kracht KP 2-3
- Page 1 D.0026940002 Operating instructions (Translation) High pressure gear pump KP 2-3 English 04 • 24/03/2025...
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Page 2: Table Of Contents
Table of content Kracht GmbH Table of content 1 General ............................1.1 About the documentation..........................1.2 Manufacturer address ............................ 1.3 Other applicable documents ........................1.4 Symbols................................2 Safety............................2.1 Intended use ..............................2.2 Personal qualification ............................. 2.3 Basic safety instructions .......................... - Page 3 Kracht GmbH Table of content 6.4.1 General.............................. 26 6.4.2 Suction line............................26 6.4.3 Pressure pipe..........................28 6.4.4 Connection line installation ...................... 28 6.5 Change of the direction of rotation......................28 7 Commissioning ........................... 29 7.1 Safety instructions for start-up........................29 7.2 Preparation .................................
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Page 4: General
1 | General Kracht GmbH 1 General 1.1 About the documentation These operating instructions describe the installation, operation and maintenance of the follow- ing product: High pressure gear pump KP 2 - 3 These operating instructions are an integral part of the product and must be kept in the imme- diate vicinity of the product and accessible to the personnel at all time. -
Page 5: Symbols
Kracht GmbH General | 1 1.4 Symbols DANGER Identification of an immediate hazard, which can lead to death or severe bodily injury if not avoided. WARNING Identification of a potential medium risk hazard, which can lead to death or severe bodily injury if not avoided. -
Page 6: Safety
2 | Safety Kracht GmbH 2 Safety 2.1 Intended use 1. The product has been designed for operation with fluids. Dry operation is not permitted. 2. The product may only be operated when completely filled. 3. The fluid must be compatible with the materials used in the product. Chemical expertise is required for that. -
Page 7: Basic Safety Instructions
Kracht GmbH Safety | 2 2.3 Basic safety instructions NOTICE Basic safety instructions Non-compliance can lead to hazards for people and the unit. a) Follow existing regulations for accident prevention and safety at work as well as the internal regulations of the operating company. - Page 8 2 | Safety Kracht GmbH DANGER Rotating parts Risk to life due to entanglement or winding of parts of the body, hair or clothing items. a) Take measures to prevent accidental touching of rotating parts. WARNING Rotating parts Risk of injury caused by ejected parts a) Enclose rotating parts so that in the event of fracture or malfunction, there is no risk caused by ejected parts.
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Page 9: Device Description
Kracht GmbH Device description | 3 3 Device description 3.1 Functional principle The pumps of this series are external gear pumps, which operate according to the displacement principle. Suction connection Pressure connection During rotation, two interlocking gears cause a volume increase by opening the tooth spaces on... -
Page 10: Variants
3 | Device description Kracht GmbH 3.2 Variants Gear pump Housing Plain bearings Support strips Sealing the pressure fields for axial play compensation Slide plate Gears O-ring Flange cover Rotary shaft seal Drive shaft Multi-stage design First stage Second stage... -
Page 11: Type Key
Kracht GmbH Device description | 3 3.3 Type key Ordering example 2/20 1 N 1 0 S 1 Z 0 P W /… 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. - Page 12 3 | Device description Kracht GmbH Explanation of type key 0 Without 12. 2nd shaft end 0 Without 1 yes 13. Axial clearance compensation 0 Without 1 yes 14. Suction side connection Size A Ø 26 with LK 55 to Vg 50 D Whitworth pipe thread G1 E SAE 1“...
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Page 13: Direction Of Rotation And Discharge
Kracht GmbH Device description | 3 3.4 Direction of rotation and discharge The direction of rotation is indicated by the curved arrow, when looking towards the end of the drive shaft. The pump connections are below the drive shaft. The flow direction is indicated by the straight arrow. - Page 14 3 | Device description Kracht GmbH Size Shaft M Profile DIN Diametral Number of pitch (DP) teeth 41.2 SAE B 16/32 21.81 25.4 KP 2 B28x25 5482 27.5 W35x2 5480 34.6 KP 3 SAE C 12/24 31.23 38 B28x25 5482 27.5...
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Page 15: Technical Data
Kracht GmbH Technical data | 4 4 Technical data 4.1 General General information Mounting position External loads on shaft Axial forces are not permissible Speed Nominal sizes [} 16] Operating pressure Allowable pressures [} 17] Permitted in ν 10 mm²/s continuous ν... -
Page 16: Nominal Sizes
4 | Technical data Kracht GmbH 4.2 Nominal sizes Nom- Geom. dis- Speed Minimum speeds Mass inertia inal placement [cm³/U] [rpm] at p= … bar J [kg m²] Housing connec- tion F; G; A; V G; J; 180 ≥ 200 Y;... -
Page 17: Allowable Pressures
Kracht GmbH Technical data | 4 4.3 Allowable pressures 4.3.1 Operating pressure at suction side Nominal Suction side [bar [bar e min abs. e max rel. 2 (≤ 2800 rpm) - - - 2.5 (≤ 2000 rpm) - - - 5 (≤... -
Page 18: Permissible Temperature Range
4 | Technical data Kracht GmbH 4.4 Permissible temperature range Sealing material Fluid temperature ϑ ϑ [°C] ϑ [°C] m min m max Sealing material Ambient temperature ϑ ϑ [°C] ϑ [°C] u min u max NOTICE Note media-specific properties. -
Page 19: Weight
Kracht GmbH Technical data | 4 4.6 Weight Nominal Gear pump [kg] Fixing type 11.5 10.5 12.5 11.5 10.5 12.5 11.5 13.5 23.5 24.5 24.5 26.5 27.5 29.5 4.7 Dimensions The dimensions of the product are given in the technical data sheets. -
Page 20: Transport And Storage
5 | Transport and storage Kracht GmbH 5 Transport and storage 5.1 General a) After receiving the delivery, check the product for transport damage. b) If transport damage is found, the manufacturer and the transport company must be notified immediately. The product must then be replaced or repaired. -
Page 21: Storage Conditions
Kracht GmbH Transport and storage | 5 Products with EPDM seals are not mineral oil resistant and their function is not tested. The in- ternal parts are not preserved. If the product is not put into operation immediately, all surfaces exposed to corrosion must be protected by suitable preservation measures. -
Page 22: Installation
6 | Installation Kracht GmbH 6 Installation 6.1 Safety instructions for installation DANGER Hazardous fluids Danger to life when handling hazardous fluids a) Comply with the safety data sheets and regulations on handling the hazardous fluids. b) Collect and dispose of hazardous fluids so that no hazard is created for persons or the en- vironment. -
Page 23: Noise Reduction
Kracht GmbH Installation | 6 WARNING Failure of pressure bearing parts due to overload Risk of injury from flying parts. Risk of injury due to splashing fluids. a) Before carrying out any work, depressurise the product and all connection pipes. -
Page 24: Mechanical Installation
6 | Installation Kracht GmbH 6.3 Mechanical installation 6.3.1 Preparation a) Check the product for transport damage and contamination. b) Check the product for smooth and easy movement. c) Remove any preservative present. d) Clean all lines. ð Only use cleaning agents that are compatible with the materials used. - Page 25 Kracht GmbH Installation | 6 CAUTION Hot surfaces Burns of the skin on contact. a) Wear protective gloves at temperatures ≥48°C. Tightening torques [Nm] Thread size Counter-thread Alu- minium Counter-thread Cast iron / Steel Screws/Nuts with min. strength class 8.8/8 NOTICE a) Comply with the allowable displacement values of the coupling.
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Page 26: Connection Lines
6 | Installation Kracht GmbH 6.4 Connection lines 6.4.1 General WARNING Failure of pressure bearing parts due to overload Risk of injury from flying parts. Risk of injury due to splashing fluids. a) Use only connections and lines approved for the expected pressure range. - Page 27 Kracht GmbH Installation | 6 NOTICE Cavitation damage Pressure below the permissible suction side pressure causes cavitation a) Design the suction line so that the pressure that sets in during operation is always higher on the suction side than the vapour pressure of the pumped medium. At the same time, make sure that the device is installed above sea level.
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Page 28: Pressure Pipe
6 | Installation Kracht GmbH 6.4.3 Pressure pipe When designing the lines, bear in mind the following points: – Choose the nominal size of the pressure line so that the maximum permissible pressures are not exceeded. – If necessary, provide a venting nozzle to prevent suction problems. -
Page 29: Commissioning
Kracht GmbH Commissioning | 7 7 Commissioning 7.1 Safety instructions for start-up DANGER Hazardous fluids Danger to life when handling hazardous fluids a) Comply with the safety data sheets and regulations on handling the hazardous fluids. b) Collect and dispose of hazardous fluids so that no hazard is created for persons or the en- vironment. -
Page 30: Preparation
7 | Commissioning Kracht GmbH 7.2 Preparation a) Before starting the system make sure that a sufficient quantity of the service fluid is extant to avoid dry running. This must be taken into account especially with large line volumes. b) Check all fastening screws on the product. -
Page 31: Removal
Kracht GmbH Removal | 8 8 Removal 8.1 Safety instructions for disassembly DANGER Hazardous fluids Danger to life when handling hazardous fluids a) Comply with the safety data sheets and regulations on handling the hazardous fluids. b) Collect and dispose of hazardous fluids so that no hazard is created for persons or the en- vironment. -
Page 32: Dismantling
8 | Removal Kracht GmbH ATTENTION Blocking of the product due to curing media Curing media can mechanically block the product and make it unusable. a) Clean the product immediately after operation with curing media. 8.2 Dismantling a) Depressurise and de-energise the system. -
Page 33: Maintenance
Kracht GmbH Maintenance | 9 9 Maintenance 9.1 Safety instructions for maintenance DANGER Hazardous fluids Danger to life when handling hazardous fluids a) Comply with the safety data sheets and regulations on handling the hazardous fluids. b) Collect and dispose of hazardous fluids so that no hazard is created for persons or the en- vironment. -
Page 34: Maintenance Work
9 | Maintenance Kracht GmbH 9.2 Maintenance work Checking and documentation of the operating data Regular checking and documentation of all operating data helps to detect faults at an early stage. – Perform the maintenance work according to specifications. – Replace defective or worn components. -
Page 35: Maintenance Table
Kracht GmbH Maintenance | 9 9.4 Maintenance table 9.4.1 Maintenance table Additional in- formation 9.4.2 Check the operating pressure 9.4.3 Check the media temperature 9.4.4 Check the device temperature 9.4.5 Check the function of the add-on valve 9.4.6 Check the equipotential bonding 9.4.7... -
Page 36: Check The Operating Pressure
9 | Maintenance Kracht GmbH 9.4.2 Check the operating pressure The operating pressure is indicated by the pressure gauges. – If there is no operating pressure, check the individual components of the product. – Comply with the product-specific data sheets/operating instructions. -
Page 37: Visual Check Of The Gearbox Condition
Kracht GmbH Maintenance | 9 9.4.11 Visual check of the gearbox condition The driving shaft pinion and driven shaft pinion are wearing parts. In case of excessive wear, the parts or the pump must be replaced. Important places to check are the surfaces opposite the shaft seal and bearing bushes, end faces of the driving shaft pinion and driven shaft pinion as well as the tooth flanks. -
Page 38: Replacing The Shaft Seal
9 | Maintenance Kracht GmbH 9.4.18 Replacing the shaft seal With the appropriate know-how and adequate equipment, the repair can also be carried out by the installer/operating company. To this end, if necessary, request spare parts and assembly drawings from the manufacturer. -
Page 39: Repair
Kracht GmbH Repair | 10 10 Repair 10.1 Safety instructions for repairs DANGER Hazardous fluids Danger to life when handling hazardous fluids a) Comply with the safety data sheets and regulations on handling the hazardous fluids. b) Collect and dispose of hazardous fluids so that no hazard is created for persons or the en- vironment. -
Page 40: General
10 | Repair Kracht GmbH 10.2 General Corrective maintenance includes: 1. Troubleshooting Finding damage, determining and localising the cause of the damage. 2. Damage repair Removing the primary causes and replacing or repairing defective components. Repairs are generally carried out by the manufacturer. -
Page 41: Fault Table
Kracht GmbH Repair | 10 10.3 Fault table Fault Potential causes Possible measures Increased noise Excessive negative pressure Check suction line design (not complete filling of the Use noise-optimised pump pump) Suction line clogged Clean the suction line Clean suction filter or use a lar-... - Page 42 10 | Repair Kracht GmbH Pump does not suck Reduce the start-up pressure The air in the suction line can- Vent the pressure line not be compressed in the pres- Increase volume of the pres- sure line sure line Check the pump design...
- Page 43 Kracht GmbH Repair | 10 Impermissible pump heating Constant triggering of pressure Increase valve opening pres- relief valve (if existing) sure Pressure too high in associ- ation with a media viscosity Check the system design that is too low Speed too fast in connection...
- Page 44 10 | Repair Kracht GmbH Correct the alignment of the coupling and secure the coup- Alignment error ling halves Premature spider wear Replace spider Check material compatibility Spider failure due to chemical corrosion Replace spider Motor protection switch tripped Driving power too low...
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