Grundfos NK Installation And Operating Instructions Manual
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Grundfos NK Installation And Operating Instructions Manual

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GRUNDFOS INSTRUCTIONS
NK, NKG
Installation and operating instructions

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Summary of Contents for Grundfos NK

  • Page 1 GRUNDFOS INSTRUCTIONS NK, NKG Installation and operating instructions...
  • Page 3 NK, NKG English (GB) Installation and operating instructions ........4 中文...

  • Page 4: Table Of Contents

    13.3 Sound pressure level ... . . 50 Foundation of horizontally mounted NK, 13.4 Belt drive ....51 NKG pumps .

  • Page 5: Notes

    Grundfos installation and operating instructions, safety instructions and service instructions. 2.1.1 Pumped liquids NK, NKG pumps are suitable for clean, thin, non- explosive liquids without solid particles or fibres. The Observe these instructions for explosion- pumped liquid must not attack the pump materials proof products.

  • Page 6: Identification

    2.2 Identification 2.2.1 Nameplate Example of NK, NKG nameplate 0.70 Type/Model DK-8850 Bjerringbro, Denmark NKGE 200-150-200/218-202AA1F2BESBQQEWW1 B96838797P420430001 Ver. 761.5 30.9 η 16/120 83.3 bar/°C 8.58 WRAS 23C Imp. Dia. (in.) Made in Hungary 2970 Legend Pos. Description Type designation Identification code...
  • Page 7 2.2.2 Type key Example 1: NKGE 125-100-160/160-140BSA1F2AESBAQERW1 Example 2: NKGE 200-150-315.2/317ACA1F3AESDAQFYW4 Example 3: NKG 100-65-200/219SAZ1F2KESBQQEXX4 Example 4: NK 32-125/97AA1F1AESBQQEHX2 Example 5: NK 80-200/222VAXEF1BESBQQEWX2 Pos. 10 11 12 13 14 16 17 18 Example 1 NKGE 125 -100 -160 /160-140 BAQE R W 1 Example 2 NKGE 200 -150 -315.2...
  • Page 8 Pos. Explanation Code for pump version; the codes may be combined A1: Basic version, grease-lubricated standard bearing design, standard coupling A2: Basic version, grease-lubricated standard bearing design, spacer coupling B: Oversize motor (+E): With ATEX approval, certificate or test report, the second character of the pump version code is an E G1: Grease-lubricated heavy-duty bearing design, standard coupling G2: Grease-lubricated heavy-duty bearing design, spacer coupling...
  • Page 9 Pos. Explanation Code for materials Code Pump housing Impeller Wear ring Shaft EN-GJL-250 EN-GJL-200 Bronze/brass 1.4021/1.4034 EN-GJL-250 Bronze CuSn10 Bronze/brass 1.4021/1.4034 EN-GJL-250 EN-GJL-200 Bronze/brass 1.4401 EN-GJL-250 Bronze CuSn10 Bronze/brass 1.4401 EN-GJL-250 EN-GJL-200 EN-GJL-250 1.4021/1.4034 EN-GJL-250 Bronze CuSn10 EN-GJL-250 1.4021/1.4034 EN-GJL-250 EN-GJL-200 EN-GJL-250 1.4401...
  • Page 10 Pos. Explanation Rubber parts in pump E: EE F: FF G: FE H: KE I: KM J: KV K: KK M: MN N: ME O: OO V: VV • The first letter indicates material of elastomer between pump housing and cover, and elastomer between cover and split cover.
  • Page 11 BAQE shaft seal • 30 kW motor, not for sale in North America, 2- Example 4: NK 32-125/97AA1F1AESBQQEHX2 pole, 50 Hz. shows an NK 32-125 pump with these characteristics: • 97 mm closed impeller, cylindrical trim Example 2: NKGE 200-150-315.2/317ACA1F3AESDAQFYW4 •...
  • Page 12 Codes for shaft seals Example 5: NK 80-200/222VAXEF1BESBQQEWX2 shows an NK 80-200 pump with these characteristics: The digits are only used for double shaft seal solutions. • 222 mm super vortex impeller • hydraulic version A Digits Letters Description •...
  • Page 13 U: Dynamic O-rings in ring For a thorough description of stuffing boxes and FFKM and static O-rings materials, see the data booklet "NB, NBG, NK, NKG, in PTFE NBE, NBGE, NKE, NKGE - Custom-built pumps according to EN 733 and ISO 2858".
  • Page 14 Used for pumps where the pump shaft input power exceeds 200 hp (150 kW) and is not regulated under Pos. 16 in NK, NKG type key example. the DOE pump rule. Special cases with power sizes above 200 hp (150...

  • Page 15: Receiving The Product

    3. Receiving the product Codes for phase and voltage or other information Pos. 17 in NK, NKG type key example. 3.1 Delivery The pumps are tested 100 % before leaving the Code Description factory. The test includes a function test where the...

  • Page 16: Installing The Product

    4. Installing the product 5. Mechanical installation 4.1 Location 5.1 Lifting the product CAUTION Motors from 4 kW and up are supplied with Hot or cold surface lifting eyes which must not be used for Minor or moderate personal injury lifting the entire pump unit.

  • Page 17: Foundation Of Horizontally Mounted Nk, Nkg Pumps

    5.2 Foundation of horizontally mounted NK, NKG pumps We recommend that you install the pump on a plane and rigid concrete foundation which is heavy enough to provide permanent support for the entire pump. The foundation must be capable of absorbing any vibration, normal strain or shock.
  • Page 18 5.2.2 Preparing the foundation pumps We recommend the following procedures to ensure a For NK, NKG pumps with 2-pole motors equal to or good foundation: bigger than 55 kW, grouting of the base frame is 1. Pour the foundation without interruption to 19 to mandatory in order to prevent vibration energy from 32 mm of the final level.
  • Page 19 5.2.3 Levelling the base frame 5.2.4 Preliminary alignment Follow the steps below to level the base frame: DANGER 1. Lift or jack up the base frame to the final level Electric shock 19-32 mm above the concrete foundation, and Death or serious personal injury support the base frame by means of blocks and ‐...
  • Page 20 3. The number of steel bars depends on the size of the base frame, but we recommend that you distribute a minimum of 20 bars evenly over the whole area of the base frame. A: shuttering 7. If necessary, check the levelling of the base frame again before grouting.

  • Page 21: Alignment Of Pump And Motor

    5.3 Alignment of pump and motor 12. Approximately two weeks after pouring the grout, or when the grout has thoroughly dried, apply an When a complete unit is supplied assembled from the oil-based paint to the exposed edges of the grout factory, the coupling halves have been accurately to prevent the grout from getting into contact with aligned by means of foil inserted under the pump and...
  • Page 22 5.3.1 Aligning the pump and motor with a straightedge ruler 1. Make a rough alignment of pump and motor, and tighten the screws in the base frame to the correct torque. • If the measured values are less than 0.2 mm, the alignment is complete.
  • Page 23 8. Check the gap S2 both vertically and horizontally. 4. Place laser unit S, stationary, on the stationary part and laser unit M, movable, on the movable • If the air-gap width is within the tolerances, the part. alignment is complete. •...
  • Page 24 7. Measure the distance between the white lines on the laser units. 12. Enter the distance. 8. Enter the distance. 13. Measure the distance from the S unit to the rear screw on the motor. 9. Measure the distance between the S unit and the centre of the gap between the couplings.
  • Page 25 15. Turn the laser units to position 9 o'clock. 20. Adjust the position of the motor. Loosen the screws that hold the motor in place. 16. Confirm on the control box. 21. Insert shims with the required thickness. 17. Turn the laser units to position 12 o'clock. Confirm on the control box.
  • Page 26 0/-1 0/-1 See the table Air-gap width S2Air-gap width for couplings.. 5.3.3 Tightening torques If the coupling and motor are not supplied by Tightening Grundfos, make sure to follow the coupling torque Description Dimensions manufacturer’s instructions. [Nm] WARNING 10 ± 2 Crushing hazard 12 ±...

  • Page 27: Pipes

    5.4 Pipes 5.4.2 Bypass DANGER 5.4.1 Pipe installaiton Explosion hazard When installing the pipes, the pump housing must not Death or serious personal injury be stressed by the pipes. ‐ The pump is not allowed to run against The inlet and outlet pipes must be of an adequate a closed valve except during startup.

  • Page 28: Expansion Joints

    5.5.2 Vibration dampers To prevent the transmission of vibrations to buildings, we recommend that you isolate the pump foundation from building parts by means of vibration dampers. This decision must be made by the customer or designer or consultant of the installation. The selection of the right vibration damper requires the following data: •...

  • Page 29: Stuffing Box Piping

    5.8 Bearing bracket Due to the risk of rupture of the rubber bellows, we recommend that you use metal bellows expansion 5.8.1 Lubricating bearing bracket with grease joints at temperatures above 100 °C combined with high pressure. • For bearing bracket with grease nipples, relubricate the bearings using a grease gun.
  • Page 30 5.8.2 Bearing bracket with constant-level oiler There is no oil in bearing bracket when it is delivered. Fit the constant-level oiler on the bearing bracket before filling oil into the bearing bracket. See instructions on the label on the reservoir. 4.

  • Page 31: Bearing Monitoring

    Checking the oil level These sensors can be factory-fitted, but can also be retrofitted. A Grundfos sensor is available. The oil level in the bearing bracket will be correct as long as the function of the constant-level oiler is correct.

  • Page 32: Pressure Gauge And Mano-Vacuum Gauge

    5.10 Pressure gauge and mano-vacuum 6. Electrical connection gauge The electrical connection must be carried out by a To ensure continuous monitoring of the operation, we qualified electrician in accordance with local recommend that you install a pressure gauge on the regulations.

  • Page 33: Motor Protection

    IN: 3x380-500 V 50/60Hz 3.7A The table below shows the numbers and sizes of OUT: 3x0-Vin 0-100Hz 4.1 A 2.8 kVA cable entry holes of the terminal box of Grundfos MG CHASSIS/IP20 Tamb. 45C/122F motors according to the standard EN 50262.

  • Page 34: Frequency Converter Operation

    It must be 37 kW and 6-pole possible to turn the pump shaft manually. Contact Grundfos. motors from 30 kW 2. If the pump has been inactive for a long period, Fit an output filter between the turn it manually to make sure it has not got stuck.

  • Page 35: Priming

    7.3 Priming 7.3.1 Priming the product in closed systems or open systems where the liquid level is above the pump inlet 1. Close the isolating valve in the outlet pipe and slowly open the isolating valve in the inlet pipe. Both the pump and the inlet pipe must be completely filled with liquid.

  • Page 36: Checking The Direction Of Rotation

    7.4 Checking the direction of rotation WARNING Escaping liquid Death or serious personal injury Do not start the pump to check the ‐ direction of rotation until it has been filled Pay attention to the orientation of with liquid. the vent hole to ensure that the escaping liquid does not cause The correct direction of rotation is shown by arrows personal injury or damage to the...

  • Page 37: Number Of Motors Starting Or Stopping

    8. Storing the product 7.6.1 Mechanical shaft seals Mechanical shaft seals are precision components. If 1. The contractor must inspect the equipment on the mechanical shaft seal of a recently installed pump delivery and make sure that it is stored in such a fails, it normally happens within the first few hours of way that corrosion and damage are avoided.

  • Page 38: Servicing The Product

    The product will be classified as contaminated if it has been used for a liquid which is toxic or injurious to health. If you request Grundfos to service the product, contact Grundfos with details about the liquid before returning the product for service. Otherwise, Grundfos can refuse to accept the product for service.

  • Page 39: Lubrication Of Bearings In Bearing Bracket

    See section Taking the product out of operation. New bearings must be filled with grease according to Grundfos specifications. Clean up all the Bearing bracket with closed, greased-for-life used grease in the bearing bracket before replacing bearings the new bearing.
  • Page 40 3. Refit the main drain plug in the bottom of the bearing bracket. Never mix greases with different Grundfos recommends SKF SYSTEM 24 thickeners, such as a lithium-based grease lubricators, type LAGD 125/HP2 or LAGD 60/HP2. with a sodium-based grease, before checking with the suppliers.
  • Page 41 100,000 operating hours. After that period, we recommend that you replace the bearings. Grundfos recommends SKF LGHP2 grease for See section Taking the product out of operation. relubrication. See the table below.

  • Page 42: Monitoring Equipment

    10.5 Lubrication of motor bearings 10.2.3 Changing the oil 1. Place a suitable container under the bearing 10.5.1 MG motors bracket to collect used oil. The bearings of motors up to 11 kW are greased for 2. Remove the filling plug and the drain plug. life and require no lubrication.

  • Page 43: Taking The Product Out Of Operation

    11. Taking the product out of operation 11.1 Protecting the pump during periods of inactivity and frost Pumps that are not being used during periods of frost must be drained to avoid damage. WARNING Escaping liquid Death or serious personal injury ‐...

  • Page 44: Fault Finding The Product

    12. Fault finding the product CAUTION Hot or cold surface DANGER Minor or moderate personal injury Electric shock ‐ When pumping hot or cold liquids, Death or serious personal injury make sure that persons cannot ‐ Before removing the terminal box accidentally come into contact with hot cover and before removing or or cold surfaces.
  • Page 45 Fault Cause Remedy a) The pump is blocked by impurities. Clean the pump. b) The pump is running above rated duty Set the duty point in accordance with the point. data sheet. 2. The motor- If less flow is sufficient, reduce the flow on protective circuit c) The density or viscosity of the liquid is the outlet side.
  • Page 46 Fault Cause Remedy Vent the inlet pipe or the pump and a) There is air in the inlet pipe or pump. replenish. Increase the liquid level on the inlet side. Open the isolating valve in the inlet pipe. b) The inlet pressure is too low. Make sure that all the conditions in Stuffing box piping are complied with.

  • Page 47: Technical Data

    13. Technical data sea level at an ambient temperature of 75 °C, the motor must not be loaded more than 88 % x 78 % = 68.6 % of the rated output. 13.1 Operating conditions 13.1.2 Liquid temperature 13.1.1 Ambient temperature and altitude Liquid temperature: -40 to +140 °C Do not exceed the allowable maximum The maximum liquid temperature is stated on the...
  • Page 48 • The flow rate is considerably higher than the selecting it in the Grundfos Product Center. See pump's nominal flow rate. www.grundfos.com. •...

  • Page 49: Electrical Data

    Shaft seal diameter [mm] 28, 38 48 55 60 Seal Temperature Shaft seal type Rubber Code Max. pressure [bar] faces range EPDM BAQE 0-120 °C 16 16 16 BAQV 0-90 °C 16 16 16 Bellows seal, EPDM BBQE 0-120 °C 16 16 16 type B, BBQV...

  • Page 50: Sound Pressure Level

    13.3 Sound pressure level Maximum sound pressure level The data in this table applies for pumps including [dB(A)] - ISO 3743 Motor [kW] motor, such as MG, MMG and Siemens motors. Three-phase motors The values stated are maximum sound pressure 2-pole 4-pole 6-pole...

  • Page 51: Belt Drive

    1. Use the public or private waste collection service. 2. If this is not possible, contact the nearest Max. motor power [kW] for shaft end Speed n Grundfos company or service workshop. [min ∅24 ∅32 ∅42 ∅48 ∅60...
  • Page 52 Appendix A A.1. China RoHS, table A 产品中有害物质的名称及含量 有害物质 部件名称 铅 汞 镉 六价铬 多溴联苯 多溴联苯醚 (Pb) (Hg) (Cd) (Cr6+) (PBB) (PBDE) 泵壳 紧固件 管件 定子 转子 本表格依据 SJ/T 11364 的规定编制 O：表示该有害物质在该部件所有均质材料中的含量均在 GB/T 26572 规定的限量要求以下。 X： 表示该有害物质至少在该部件的某一均质材料中的含量超出 GB/T 26572 该规定的限量要求。 该产品环保使用期限为...
  • Page 53 Argentina China Greece Bombas GRUNDFOS de Argentina S.A. GRUNDFOS Pumps (Shanghai) Co. Ltd. GRUNDFOS Hellas A.E.B.E. Ruta Panamericana km. 37.500industin 10F The Hub, No. 33 Suhong Road 20th km. Athinon-Markopoulou Av. 1619 - Garín Pcia. de B.A. Minhang District P.O. Box 71 Tel.: +54-3327 414 444...
  • Page 54 Fax: +66-2-725 8998 Fax: + 370 52 395 431 Москва, RU-109544, Russia Turkey Тел. (+7) 495 564-88-00 (495) 737-30-00 Malaysia GRUNDFOS POMPA San. ve Tic. Ltd. Факс (+7) 495 564 8811 GRUNDFOS Pumps Sdn. Bhd. Sti. E-mail grundfos.moscow@grundfos.com 7 Jalan Peguam U1/25 Gebze Organize Sanayi Bölgesi...
  • Page 55 96658410 04.2021 ECM: 1310104...

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