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Diaphragm liquid pump NF 30, NFB 30

Servicing

KNF Flodos AG BA_NF30_EN_05_069206.docx
Translated from the Original Operating and Installation Instructions

8. Servicing

8.1. Servicing schedule

Component

Servicing interval

Pump

Regular inspection for external
damage or leaks

Pump head

Clean if the flow rate decreases, the
pump does not work or no vacuum
is created (Section 8.2)

Diaphragm, valve
plates and seals

Change as soon as pumping
capacity decreases, preferably
sooner

Tab. 13

8.2. Cleaning

WARNING

Health hazard due to dangerous substances

in the pump!
Depending on the substance transferred, risk of
caustic burns or poisoning.

➔

Wear protective clothing if necessary, e.g.

protective gloves.

➔

Rinse the pump with a neutral liquid and pump

empty.

8.2.1. Flushing the pump

➔

If pumping aggressive media, KNF recommends flushing the

pump with air under atmospheric conditions for several
minutes prior to switch off (if necessary for safety reasons: use
an inert gas). This will extend the service life of the diaphragm.

8.2.2. Cleaning the pump

➔

Where possible, wipe the components with a soft dry cloth. Do

no use cleaning solvents as these may corrode plastic parts.

➔

If there is compressed air available, blow off the separate

parts.

▪

Pump must be switched off and mains plug removed from
the socket.

▪

The pump must be free of any hazardous substances.

▪

Hoses must be disconnected from the pump head.

▪

We recommend replacing the diaphragm when the head
parts are removed.

Qty.

Tool

Torxplus 10 IP screwdriver

Tab. 14

Information on procedure

Prior requirements

Tools

Содержание NF 30

Страница 1: ...try specific designation with no technical relevance Contents Page 1 About this document 2 2 Use 3 3 Safety 5 4 Technical data 7 5 Assembly and function 10 6 Installation and connection 11 7 Operation 18 8 Servicing 21 9 Troubleshooting 25 10 Decontamination declaration 27 KNF Flodos AG Wassermatte 2 6210 Sursee Switzerland Tel 41 0 41 925 00 25 Fax 41 0 41 925 00 35 www knf flodos ch info knf flo...

Страница 2: ...ndicates the possible consequences of failure to observe the warning The signal word i e Warning indicates the level of danger This specifies measures for avoiding the danger and the consequences of failure to implement these measures Danger levels Signal word Meaning Consequences if not observed DANGER warns of immediate danger Death or serious injuries and or serious material damage are the cons...

Страница 3: ...these can prevent the pump from working correctly If this cannot be guaranteed a filter 100 m with sufficiently large filter area must be used upstream of the pump The 51 versions of our diaphragm liquid pump range have been certified by NSF according to the standard NSF ANSI 169 and are therefore suitable for use with foodstuffs without any restrictions All materials used have been checked throug...

Страница 4: ...lication KNF is unable to guarantee cleaning options The responsibility for cleaning the pump s therefore lies with the user While the NSF ANSI 169 standard regulates OEM products it does not define cleaning methods for specific OEM products All parts in contact with the medium can be replaced as spare parts without losing the certification Component parts cannot be traded as certified parts When ...

Страница 5: ...understood the operating and installation instructions and in particular the Safety chapter Always ensure adherence to all pertinent accident prevention and safety regulations when working on and operating the pump Always observe the safety regulations when handling dangerous media Always ensure adherence to all information stickers on the pumps such as flow direction arrows and type plates and ke...

Страница 6: ...and not ready for use the overall equipment must be made to fully conform with the requirements of the Directive before being brought into service Always ensure implementation and enforcement of the basic requirements of the Machinery Directive 2006 42 EC according to Appendix I General Principles The following harmonised standards are met NF 30 DC EN 55014 1 NF 30 DCB B DCB 4B IEC EN 61000 6 2 IE...

Страница 7: ...rding to DIN ISO 1629 and 1043 1 The pump type KT stands for Assembly Material1 Pump head PP Valve plate FFKM Diaphragm PTFE Diaphragm 27 FFKM Tab 3 1 according to DIN ISO 1629 and 1043 1 The pump type TT stands for Assembly Material1 Pump head PVDF Valve plate FFKM Diaphragm PTFE Diaphragm 27 FFKM Tab 4 The pump type FT stands for Assembly Material1 Pump head PTFE Valve plate FFKM Diaphragm PTFE ...

Страница 8: ...d 3 For version with PTFE diaphragm max 5 mWG Hydraulic connections Parameter Value Recommended hose size ID mm 4 Tab 7 Specifications NF 30 DC Motor voltage 12V 24V Power consumption W 8 3 8 6 Max current at max load A 0 69 0 36 Protection class IP 00 Weight1 g 180 Tab 8 Specifications NF 30 DCB B DCB 4B Motor variant DCB B DCB B DCB 4B Supply voltage V 12 24 10 26 4 Power consumption W 7 7 7 7 4...

Страница 9: ...ption W 26 Max current at max load A 0 21 Max motor current A 0 22 Protection class IP 00 Weight1 g 570 Tab 11 1 The weight may differ slightly from the stated value depending on the version Electrostatic sensitive components ESD Various parameters Parameter Value Permissible ambient temperature range C 5 to 40 Permissible media temperature range C 5 to 80 Permissible kinematic viscosity of the me...

Страница 10: ... through the inlet valve 2 During the up stroke it forces medium out of the pump head through the exhaust valve 1 The diaphragm hermetically seals off the working chamber 3 from the pump drive 7 NF 30 version specified flow rate This pump type represents this product in its simplest form and delivers media at the specified flow rate NF 30 27 version specified flow rate with overpressure limiting I...

Страница 11: ... Only install and operate the pumps under the operating parameters and conditions described in Chapter 4 Technical data Observe the safety notes see Chapter 3 6 1 Installation Before installation store the pump at the installation location to bring it up to ambient temperature Mounting dimensions see Fig 3 to 12 Fig 3 Mounting dimensions NF 30 DC Fig 4 Mounting dimensions NF 30 27 DC Mounting dime...

Страница 12: ...on and connection KNF Flodos AG BA_NF30_EN_05_069206 docx Translated from the Original Operating and Installation Instructions 12 Fig 5 Mounting dimensions NF 30 DCB B Fig 6 Mounting dimensions NF 30 DCB 4B Fig 7 Mounting dimensions NF 30 27 DCB B ...

Страница 13: ...tion and connection KNF Flodos AG BA_NF30_EN_05_069206 docx Translated from the Original Operating and Installation Instructions 13 Fig 8 Mounting dimensions NF 30 27 DCB 4B Fig 9 Mounting dimensions NF 30 E Fig 10 Mounting dimensions NF 30 27 E ...

Страница 14: ... NFB 30 Installation and connection KNF Flodos AG BA_NF30_EN_05_069206 docx Translated from the Original Operating and Installation Instructions 14 Fig 11 Mounting dimensions NFB 30 DCB B Fig 12 Mounting dimensions NFB 30 DCB 4B ...

Страница 15: ...ashes hose and drip water Protect the pump against dust Protect the pump against vibrations and jolts Generally speaking the pump can be mounted in any orientation The venting and accuracy of the pump is optimal if installed as shown in the illustration Fig 12 KNF recommends mechanically decoupling the pump from the pipework system e g by using flexible hoses or pipes This prevents any oscillation...

Страница 16: ...c shock danger of death Pump should only be connected by a specialist Only connect the pump when the power supply is turned off For pumps with direct current motors Pump should only be connected by a specialist Only connect the pump when the power supply is turned off All electrical connection work must adhere to the pertinent guidelines regulations and technical standards Connecting the pump 1 Ma...

Страница 17: ... on the pump head indicate the flow direction 1 Remove the protective caps from the connections 2 Connect the inlet and outlet lines Keep the inlet line as short as possible in order to keep the priming process as short as possible 3 If the pump is used to build up pressure make sure that all transition joints between hose and pump are secure in order to ensure that the hoses cannot come off Check...

Страница 18: ...ls Excessive pressures and its inherent dangers can be prevented by using a bypass system with a pressure relief valve between the pressure and suction side of the pump Further information is available from your KNF adviser Telephone number see first page If the pump stops running reduce the pressure in the system until it is at normal atmospheric pressure For pumps with thermal switch or electron...

Страница 19: ...age Turning the pump on In order to guarantee that the pump can start every time it is advisable to reduce the back pressure to an acceptable level This is also the case if there is a short power cut For more specific information contact the KNF specialist Telephone number see first page Turning the pump off KNF recommends if pumping aggressive liquids the pump should be rinsed thoroughly prior to...

Страница 20: ...N_05_069206 docx Translated from the Original Operating and Installation Instructions 20 Fig 16 Flow rate of pumps NF 30 DCB B DCB 4B and NF 30 27 DCB B DCB 4B Fig 17 Flow rate of pumps NF 30 E and NF 30 27 E Flow rate NFB 30 Fig 18 Flow rate of pump NFB 30 DCB B DCB 4B ...

Страница 21: ... g protective gloves Rinse the pump with a neutral liquid and pump empty 8 2 1 Flushing the pump If pumping aggressive media KNF recommends flushing the pump with air under atmospheric conditions for several minutes prior to switch off if necessary for safety reasons use an inert gas This will extend the service life of the diaphragm 8 2 2 Cleaning the pump Where possible wipe the components with ...

Страница 22: ...late 5 and connecting plate 3 using a cloth and then blow off with compressed air Mounting the diaphragm 7 Place the same number of washers 7 on the new diaphragm 6 as were on the old diaphragm thread Make sure that no washers fall into the pump housing Screw the diaphragm 6 securely back into the connecting rod 9 By lightly pressing on the diaphragm push the ridge on the underside of the diaphrag...

Страница 23: ... 27 12 4 Carefully place the head plate 27 10 with the setscrew 27 8 and the hexagon nut 27 9 over the whole unit 5 The visible lines on the intermediate plate 5 and the connecting plate 3 must be in line with each other 6 You can choose any position direction of rotation for the head plate 27 10 7 Insert the four head screws 1 in the through holes of the pump head 8 Place the pump head onto the p...

Страница 24: ... overflow 2 Switch on the pump and run until there are no air bubbles in the system 3 Close the valve downstream of the pressure gauge and check the overflow pressure at the gauge 4 Undo the hexagon nut 27 9 5 To reduce the pressure turn the setscrew 27 8 anti clockwise to increase the pressure turn it clockwise 6 Using the hexagon nut 27 9 fix the setscrew 27 8 in the required position Make sure ...

Страница 25: ...d connections Remove blockage External valve is closed or filter is blocked Check external valves and filters Diaphragm or valves are worn out Replace diaphragm and valve plate see Section 8 3 Tab 15 Pump is not priming Cause Fault remedy Suction side of pump not connected Connect the suction side of the pump Liquid in the container is too low Fill container Hose connections are not leak tight Sec...

Страница 26: ...or clamping elements Particles in the pump Clean the pump head install suction side filter if required see Section 8 2 Viscosity of the liquid is too high Contact KNF Incorrect interchange of outlet and inlet line connections Remove outlet and inlet lines and re connect correctly The head parts are not media resistant Replace the pump head with a compatible version Tab 17 Fault cannot be rectified...

Страница 27: ...n condition that the customer provides certification of the transferred media and the cleaning of the pump decontamination declaration In order to send a product back use the decontamination declaration which either was delivered with the product or is available on www knf com Downloads Please fill in the pump type serial number pumped media and all other required information Send the signed form ...

Страница 28: ...KNF worldwide Please find your local KNF partners at www knf com ...

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