Related Manuals for Kracht KFF 2.5-630
Summary of Contents for Kracht KFF 2.5-630
- Page 1 D.0027450002 Operating instructions (Translation) Gear pump KFF 2.5-630 English 09 • 26/07/2023...
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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 Installation ..........................27 6.1 Safety instructions for installation......................27 6.2 Noise reduction ..............................28 6.3 Mechanical installation ..........................29 6.3.1 Preparation............................29 6.3.2 Gear pump with free shaft end ....................29 6.4 Connection lines............................... 31 6.4.1...
- Page 4 Table of content Kracht GmbH 9.4.20 Replacing the shaft seal ......................45 9.4.21 Replacing other seals ........................45 10 Repair ............................46 10.1 Safety instructions for repairs ........................46 10.2 General ................................. 47 10.3 Fault table ................................48 88027450002-09...
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Page 5: General
1.1 About the documentation These operating instructions describe the installation, operation and maintenance of the follow- ing product: Gear pump KFF 2.5-630 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 6: Symbols
1 | General Kracht GmbH 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 7: Safety
Kracht GmbH Safety | 2 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 8: Basic Safety Instructions
2 | Safety Kracht GmbH 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 9: Fundamental Hazards
Kracht GmbH Safety | 2 2.4 Fundamental hazards 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 10 2 | Safety Kracht GmbH 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.
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Page 11: 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 12: Variants
3 | Device description Kracht GmbH 3.2 Variants Gear pump End cover O-ring Housing Driven shaft Driving shaft Plain bearings Shaft seal Roller bearings (Types of seals [} 15]) (Fixing type: G; X) Valve (only Direction of rotation: B) Gear pump with pressure relief valve... -
Page 13: Type Key
Kracht GmbH Device description | 3 Gear pump with pressure relief valve (T-valve) Pressure relief valve with Tank connection 2 Gear pump Adjustment screw 4 Hexagonal nut Retaining screw 3.3 Type key Ordering example /158 Explanation of type key 1. Product name 2. -
Page 14: Direction Of Rotation And Discharge
3 | Device description Kracht GmbH Explanation of type key 5. Seal type Double rotary shaft seal FKM Rotary shaft seal FKM (BABSL) (BABSL) Mechanical seal with FKM sec- Mechanical seal with FKM second- ondary seals (AX30) ary seals (L4) C2S2V1G3G1 (KF 2.5-200) -
Page 15: Types Of Seals
Kracht GmbH Device description | 3 3.5 Types of seals Rotary shaft seal Rotary shaft seal with roller bearings Seal type: 2 Seal type: 2 Double rotary shaft seal Double rotary shaft seal Connection borehole G 1/8 (for vacuum operation) -
Page 16: Fluid Seal
3 | Device description Kracht GmbH Mechanical seal with fluid buffer Mechanical seal KF 32-80: Connection borehole G 1/4 Seal type: 5; 40 (for fluid buffer) Seal type: 5; 40 Special number: 182; 198 3.6 Fluid seal Versions with a fluid seal are used if absolute leak tightness is required at the shaft seal, e.g. -
Page 17: Special Numbers
Kracht GmbH Device description | 3 3.7 Special numbers Special number Description Double rotary shaft seal for vacuum operation Housing connection KF 2.5-12: Flange connection SAE 3/4" KF 16-25: Flange connection SAE 1“ Mechanical seal and front-mounted rotary shaft seal... -
Page 18: Shaft Ends
3 | Device description Kracht GmbH 3.8 Shaft ends Nominal KFF 2.5-25 KFF 32-80 KFF 100-200 KFF 250-630 Nominal Special number M Profile Diametral Num- pitch (DP) ber of teeth KFF 32-80 31.75 82.17 7 SAE A 16/32 15.26 16... -
Page 19: Technical Data
Kracht GmbH Technical data | 4 4 Technical data 4.1 General General information KFF 2.5-12 Whitworth pipe thread G 3/4 KFF 2.5-12 …/158 Flange connection SAE 3/4" KFF 16-25 Whitworth pipe thread G 1 KFF 16-25 …/158 SAE 1“ Flange connection KFF 32-80 SAE 1 1/2"... -
Page 20: Nominal Sizes
4 | Technical data Kracht GmbH A reduced shaft seal life is possible in the vertical installation position (shaft end at the top). 4.2 Nominal sizes Nominal Geom. dis- Speed Perm. radial Sound pres- Mass inertia placement force sure level radial [cm³/U]... -
Page 21: Assignment Of Viscosity - Speed
Kracht GmbH Technical data | 4 4.3 Assignment of viscosity - speed Kinematic viscosity ν [mm²/s] Recommended rpm n [1/min] 3600 2900 2300 1800 1000 1200 2000 3000 6000 10000 20000 Select the speed of rotation so that complete filling of the pump is ensured. This is the case if the pressure on the suction side does not fall below the permissible pressure pe min. -
Page 22: Allowable Pressures
4 | Technical data Kracht GmbH 4.4 Allowable pressures 4.4.1 Operating pressure, suction and pressure side Seal type Special num- Operating pressure Suction side Pressure side [bar [bar [bar e min abs. e max rel. rel. (perm. contin- (Pressure ous pressure ) peaks ) Max. -
Page 23: Assignment Of Differential Pressure To Viscosity
Kracht GmbH Technical data | 4 4.5 Assignment of differential pressure to viscosity Plain bearings ∆p [bar] ν= 1.4 mm²/s ν= 6 mm²/s ν= 12 mm²/s Multi layer friction bearings (contains lead) (Standard) Fuels (WSD ≤ 520 μm) Plain bearings ∆p... -
Page 24: Weight
4 | Technical data Kracht GmbH 4.8 Weight Nominal Gear pump with [kg] Added weight End cover Pressure relief valve Mounting angle 11.2 16.0 18.7 22.2 26.5 24.8 29.1 44.2 47.2 54.7 57.9 60.8 64.0 Special number 158: +1.3 kg 4.9 Dimensions... -
Page 25: Transport And Storage
Kracht GmbH Transport and storage | 5 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 26: Storage Conditions
5 | Transport and storage Kracht GmbH 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 27: Installation
Kracht GmbH Installation | 6 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 28: Noise Reduction
6 | Installation Kracht GmbH 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 29: Mechanical Installation
Kracht GmbH Installation | 6 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 30 6 | Installation Kracht GmbH 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 31: Connection Lines
Kracht GmbH Installation | 6 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 32 6 | Installation Kracht GmbH Suction line at vacuum operation If medium is to be drawn from a tank under va- cuum, the pump must be positioned approx. 1 m below the tank. The suction line must be laid straight and without any resistances.
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Page 33: Pressure Pipe
Kracht GmbH Installation | 6 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 34: Commissioning
7 | Commissioning Kracht GmbH 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 35: Filling The Quench Chamber
Kracht GmbH Commissioning | 7 7.3 Filling the quench chamber Quench chamber Container for quench-liquid a) For versions with fluid seal, fill the quench chamber with a suitable seal fluid. ð Fill from the tank provided. ð Fill fluid until the quench chamber is completely full and the tank is half full. -
Page 36: Pressure Valve Setting
7 | Commissioning Kracht GmbH 7.4 Pressure valve setting The valves are set to the rated pressure of the respective pressure stage in the factory. Set pres- sures deviating from this are given on the type plate. response pressure lower... -
Page 37: Additional Commissioning
Kracht GmbH Commissioning | 7 Directly attached series T pressure relief valves are used to protect the gear pump. The valve can be used to control the pressure of the gear pump, which enables constant setting of the system pressure. -
Page 38: Removal
8 | Removal Kracht GmbH 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 39: Dismantling
Kracht GmbH Removal | 8 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 40: Maintenance
9 | Maintenance Kracht GmbH 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 41: Maintenance Work
Kracht GmbH Maintenance | 9 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 42: Maintenance Table
9 | Maintenance Kracht GmbH 9.4 Maintenance table 9.4.1 Maintenance table Additional in- formation 9.4.2 Check the rate of flow 9.4.3 Check the operating pressure 9.4.4 Check the media temperature 9.4.5 Check the device temperature 9.4.6 Check the function of the add-on valve 9.4.7... -
Page 43: Check The Rate Of Flow
Kracht GmbH Maintenance | 9 9.4.2 Check the rate of flow The rate of flow is measured via the volumetric flow meter. The values are displayed by the built-in controller in the electrical control system. – If there is no discharge flow, check the individual components of the product. -
Page 44: Visual Inspection For Leakage
9 | Maintenance Kracht GmbH 9.4.11 Visual inspection for leakage Care must be taken here to ensure that there is no leakage from the connections. – In the event of leaks in the connections, the glands must be tightened and, if necessary, the seals replaced. -
Page 45: Replacing The Outboard Bearing
Kracht GmbH Maintenance | 9 The bearing should therefore be checked for damage after 4000 h at the latest. In the event of unacceptable wear, the bearing must be replaced. Onsetting wear or pending failure can become noticeable due to increased heating of the bear- ing, increased power consumption, irregular running or even noise emissions. -
Page 46: Repair
10 | Repair Kracht GmbH 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 47: General
Kracht GmbH Repair | 10 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 48: Fault Table
10 | Repair Kracht GmbH 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 49 Kracht GmbH Repair | 10 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 50 10 | Repair Kracht GmbH 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 51 Kracht GmbH Repair | 10 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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