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Related Manuals for North Ridge Pumps NOVA ROTORS MN Series
Summary of Contents for North Ridge Pumps NOVA ROTORS MN Series
- Page 1 PROGRESSING CAVITY PUMPS FUNCTIONING AND MAINTENANCE MANUAL X-Cel House, Chrysalis Way, Langley Bridge, Eastwood, Nottinghamshire NG16 3RY Tel: +44 (0) 1773 302 660 | Email: sales@northridgepumps.com | Website: www.northridgepumps.com...
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Page 2: General
GENERAL 1.1 Introduction This manual includes the instructions concerning the use and maintenance of progressing cavity pumps made by NOVA ROTORS™ S.r.l.. The information included in the manual apply to the user, who must read and fully understand it before using the pumps. This instruction manual must always be available to the user for reference. -
Page 3: Fields Of Application
In addition, pumps were designed and made in accordance with these standards: UNI EN 809: 2009 – Pumps and liquid pumping units – General safety requirements. UNI EN ISO 12100-1: 2005 – Machine safety. Basic principles, general design principles. Part 1: Basic terminology, methodology. UNI EN ISO 12100-2: 2005 –... -
Page 4: Wiring
1.6.2 Wiring The wiring of machines equipped with electric motor must be made by the user in accordance with the instructions set out in standard CEI EN 60204-1:2005. Take care in: • the choice of conductor section, which must be able to bear power at start-up with locked rotor;... -
Page 5: Pump Maintenance
1.6.6 Pump maintenance Pump maintenance work must be done when the pump is at a standstill. Before removing the casings of mobile parts, make sure that the motor cannot be started again before restoring safety conditions. The pump must not be under pressure and must be cooled. Pumps or units which feed substances affecting people's health must be decontaminated. -
Page 6: Pump Functioning
2 PUMP FUNCTIONING A progressing cavity pump is a rotating volumetric pump. The main parts of the system are a rotary part called ROTOR (see A below) and a fixed part called STATOR (see B). The rotor is a round thread screw with a very large pitch, a deep thread and a small core diameter. -
Page 7: Main Technological Features Of Progressing Cavity Pumps
* Pumping of non-homogeneus products, containing gas and abrasive or solid and fibrous material in the fluid. * Pumping of very high viscous liquids. * Dosage of liquids. * No inlet or delivery valves. * Centrifugation-free pumping with low tension stress in the pumped material. * High pumping pressure (6 BAR for each stage). -
Page 8: Stator
The rotor may be made of different materials, such as carbon steel and stainless steel. It may also be coated with hardening surface treatments such as chromium plating, ceramic treatment, gas and ion nitriding, etc. 4.2 Stator The stator is built with a steel pipe internally coating with elastomeric material, chemically compatible with the properties of the fluid to be pumped. -
Page 9: Connecting Rod Joints
Note: It is possible, for a special series of feedbox pumps, to link the propeller shaft directly to an angular worm screw gearmotor, without any support. 4.4 Connecting rod joints Depending on the type of pump, the connecting rod can use different types of joints (see par. -
Page 10: Dry-Run Protection
All pumps may be equipped with accessories to improve their performance and in order to improve safety of plant. 4.6.1 Dry-run protection The protection against dry run prevents stator damage whenever the liquid is missing. A thermal sensor is fitted to the stator, and linked to the electric board. If there is no fluid in the stator, the stator rubber overheats and the increase in temperature activates the electric circuit, which stops the motor. -
Page 11: Packing, Transport, Storage
The parcels are marked and supplied with handling instructions. Upon receipt, check for possible damages. Transport damages are to be reported immediately to the carrier. Pumps are to be brought packed as near as possible to the installation site and kept packed as long as possible. -
Page 12: Electric Connection - Pipeline Connection
Therefore, remove the stator, pack it in order to shelter it from light and air, and store it in a cool, dry place. • Rotor: Rest it on wooden blocks and cover it for protection against mechanical damage. • Shaft packing: Remove the gland, and grease the shaft. •... -
Page 13: Direction Of Rotation
Insert the half-joints (or pulleys, if belt drive is employed) at the ends of the shaft without using a hammer or other tools which may damage parts inside the support. For assembly, use the threaded hole on the end of the shaft. The accurate alignment of motor and the male shaft of the pump is an essential condition for a proper operation. -
Page 14: Pipe Assembly
In close coupled versions, it is necessary to check periodically that the shaft grub screw were well tightened and fits properly in the propeller shaft cavity, especially if the pump is employed in both directions. To this purpose, see par. 6.1.2.1 of this Manual. 6.2 Pipe assembly 6.2.1 Important premise •... -
Page 15: Startup
PUMP 1 STAGE 2 STAGE 3 STAGE 4 STAGE 1230 1050 2110 1260 1580 7 STARTUP IMPORTANT! • Never operate the pump without product - this is mandatory, otherwise the stator, made of elastomeric material will overheat and may burn. A few seconds are enough to cause damage to the stator. -
Page 16: When To Perform Cleaning
• Disassemble the pump and wash every part of it with suitable detergent. Re- assemble the parts making sure they stay clean. • Perform Cleaning in Place (CIP) if the pump is suitable for this kind of cleaning. 7.2.1 When to perform cleaning •... -
Page 17: Maintenance
8 MAINTENANCE IMPORTANT: All maintenance and cleaning operations must be performed with the machine at a standstill and cut out from any energy source. After a stop and before restarting, the machine must be inspected to determine the cause of the stop command, and act with appropriate measures in order to prevent that from happening again. -
Page 18: Control And Replacement Of Articulated Joints
NOTE: The packing seal is in optimal working condition if constantly damped by the product to be pumped. 8.2.2.2 Single mechanical seal The type and brand of the mechanical seal used is specified in the order confirmation. In case of significant leakage, check the surfaces of the seal faces and seat. Replace them if necessary. -
Page 19: Propeller Shaft Joints
The male shaft bearings are greased at NOVA ROTORS™ . In case they were removed, their seat shall be filled with grease according to the table above. 8.4.3 Propeller shaft joints Pin joints with sleeve are to be periodically lubricated. Moreover, every time parts were replaced with original spare parts, their grease shall be replaced. - Page 20 Reference for malfunctioning removal: 1) Fill the pump with suitable product, gliceryn or soap (DO NOT USE any kind of oil if an EPDM rubber stator is used). 2) Check on the order for details concerning electric connections and compare. 3) Measure pressure with a manometer and compare that with the value signed in the order.
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Page 21: Disassembly And Assembly Components
9.1 Disassembly of rotor-stator 1. Disconnect the pump from intake and delivery pipes. 2. Support the pump body (01) with wooden blocks (02) under the stator (03). 3. Remove the screws holding outlet flange (04) and the housing (05) (bearing housing or close coupled housing pumps) to the base (06). -
Page 22: Rotor / Joint Disassembly And Joint Replacement
3. The operation is completed by re-inserting the pump body, stator, tie rods and pipe union. NOTE: Certain types of stators have at their end an integrated sealing profile. In this case no O’Ring washers are needed (see picture Chap. 9.1.1), neither at the union side nor at the pump body side. -
Page 23: Joint Type Sn1
9.3.2 Joint type SN1 1. Move the sleeve backwards (1), following the direction of the arrow. 2. Remove the Pin (2). The rotor or hollow shaft drive then will be free. 9.3.3 Joint type SN2 1. Remove the clamps (3). 2. -
Page 24: Joint Type Sn4
If the pump is equipped with this kind of joint, intake of fluid from the outlet is not possible (only counterclockwise rotation is allowed). This kind of joint has no spare parts available. In case of malfunctioning it shall be fully replaced. -
Page 25: Joint Type Sn6
3. The rotor will still be connected to an adapter flange (18) by the screws (19), hence they shall be unscrewed in order to completely free the rotor of the adapter flange (18). NOTE: The screw (20) serves the purpose of topping up the oil in the joint during the maintenance cycles. -
Page 26: Joint Type Sn7
9.3.8 Joint type SN7 1. Remove the screw (23), the O’ring (27) and the pin (24). 2. Extract the propeller shaft (25) from the rotor (26) (or from the hollow shaft, depending on the joint involved) by moving it in the direction of the black arrow. This kind of joint has no spare parts available. -
Page 27: Joint Type Sn9
9.3.10 Joint type SN9 1. Remove the two clamps (35) that holds the sleeve. 2. Force the rubber sleeve backwards (36) in the direction of the black arrow. 3. Remove the grub screw (37). 4. Move backwards the metallic cover (38) in the direction of the arrow. The bushing and the pin (39) will then be visible. -
Page 28: Pin Joint With Short Bell (Sn10) Type "C
9.3.11 Pin joint with short bell (SN10) type “C” DISASSEMBLING / REASSEMBLING 1. The first step is remove the screws (81.8) 2. Then pull out the cover (56) and draw back the plate rubber packing (37.1). 3. Draw back the front-ring (56) 4. -
Page 29: Mechanical Seal Replacement
DANGER! No sharpened tool shall be used for packing insertion, to prevent damage to the shaft or the packing itself. 9.4.2 Mechanical seal replacement 9.4.2.1 Small sized pumps (Mod. 010 – 015 – 020 – 022) 9.4.2.1.1 DISASSEMBLY 1. Remove stator and pump body following the steps outlined in Chap. 9.3.1 (p. 1 and 2. - Page 30 9.4.2.1.2. RE-ASSEMBLY 1. Check the condition of O’Rings, seal and stationary seat faces. 2. Check the condition of the hollow shaft. 3. Clean the hollow shaft, the housing (13) (see picture above) and all involved parts. 4. Clean and oil the propeller shaft (Rust jams the shafts coupling, thus increasing the danger of damage during disassembly).
- Page 31 ASSEMBLING 1. Insert the housing (13) on the closed coupling with the fixed part (12) of the seal already inside the housing. 2. Insert the transmission from the opposite side of the arrow with the rest of the seal (11) and, in case, the separating-ring already assembled.
- Page 32 9.4.2.3.1.1 Disassembly 1. Disconnect the flow pipes at the indicated points (01) (see picture A). 2. Remove stator and pump body following the procedure in Chap. 9.3.1 (points 1 and 3. Loosen the fixing grub screw in the threaded hole (02) and extract from the support (05) the drive (03) + housing (04) in the direction of the black arrow.
- Page 33 DANGER: During re-assembly, it is necessary to distribute the pressure uniformly on the fixed ring, to prevent malfunctioning or failures. 9.4.2.3.2 SINGLE MECHANIC SEAL 9.4.2.3.2.1 DISASSEMBLY 1. Disconnext flux piping (if fluxed seal). 2. Remove the motor (see picture A), after unscrewing the grub screw in the thread (01).
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Page 34: Mechanical Seal For Food Application (Ten6)
5. Wet with glycerine the hollow shaft on the involved area to ease the insertion of the mechanic seal. 6. Carefully clean the seal faces and the separating ring before assembly. 7. Perform the steps described in Chap. 9.5.2.2.2.1 backwards. WARNING: During re-assembly it is necessary to distribute the pressure uniformly on the fixed ring, to prevent malfunctioning or failures. -
Page 35: Oil Seal For Worm Gearmotors (Ten7)
9.4.4 Oil seal for worm gearmotors (TEN7) 9.4.4.1 Disassembling / re-assembly 1. To disassemble with pump in horizontal position, be careful to keep the transmission shaft upright, aligned with rotor. 2. Remove the motorization unthreading from the supporting studs. 3. Remove circlip (71); softly hit the male shaft using a plastic hammer following the body pump direction till the bearing (74) come out from the male shaft (be careful to keep straight and not superimposed). -
Page 36: Mechanical Seal For Food Application (Ten8)
9.4.5 Mechanical seal for food application (TEN8) 9.4.5.1 Disassembling 1. Remove the body pump. 2. Unthread the pin connecting the transmission shaft with the female drive shaft . 3. Take out the packing gland. 4. Remove the circlip (71) blocking the bearings. 5. -
Page 37: Mechanical Seal With Quench (Ten9)
9.4.6 Mechanical seal with QUENCH (TEN9) This kind of seal is part of the single mechanical seals family (see the relative paragraph): the optional is a threaded hole (quench) used for internal washing itself. 9.4.7 Single mechanical seal (TEN10) for pump mod. 010 9.4.7.1 Disassembling 1. -
Page 38: Mechanical Seals With Blocking Seal For Bare Shaft Pump
6. Remove the two screws from the seal cover (81). 7. Unthread the transmission (WARNING! Unthread from the closed coupling side!). A part of the mechanical seal remains on the transmission and the other one on the steel support. 8. Remove now the two mechanical seal parts. 9.4.7.2 Re-assembly Follow the previous operations on the contrary way. -
Page 39: Motors
11 MOTORS 11.1 Useful informations 11.1.1 Type of service (sec. IEC 34-1) 1. CONTINUOUS SERVICE Operation with constant load of sufficient duration to achieve thermal equilibrium. 2. TEMPORARY SERVICE Operation with constant load of duration not sufficient to achieve thermal equilibrium, followed by a standoff long enough to restore the ambient temperature in the motor. -
Page 40: Table Of Contents
• Seal description and spare parts • Seal cross section drawings • Motor view and lubrication 13.2 Enclosure for Atex pumps SUMMARY FUNCTIONING AND MAINTENANCE MANUAL GENERAL Introduction Information about CE marking Compliance of pump with CE Fields of application Noise Safety warning 1.6.1... - Page 41 Packing and transport Storage ELECTRIC CONNECTION – PIPELINE CONNECTION Installation of motor 6.1.1 Electric connection 6.1.2 Pump-motor coupling 6.1.3 Direction of rotation Pipe assembly 6.2.2 Max allowed pressure 6.2.3 Useful advice STARTUP Advice for optimal operation Pumps for alimentary use 7.2.1 When to perform cleaning 7.2.2...
- Page 42 9.4.4 Oil seal for worm gearmotors (TEN7) 9.4.5 Mechanical seal for food application (TEN8) 9.4.6 Mechanical seal with QUENCH (TEN9) 9.4.7 Single mechanical seal (TEN10) for pump mod.010 MECHANICAL SEALS WITH BLOCKING SEAL FOR BARE SHAFT PUMP MOTORS 11.1 Useful informations 11.1.1 Type of service (sec.