Cavity pumps – Type N and NF
The ARMATEC cavity pumps are used since several years in all sectors of industry.
For Biogas plants and Industy we offer two types of Standard Cavity pumps:
Type N
Foot-mounting gearmotor and mounted on a baseframe
- N 140
- N 120
The eccentric screw pumps from N series are high quality and very robust pumps, which are characterized by the following features:
- Large sized suction housing
- Up to 5 suction ports possible
- Generously dimensioned storage chair
- Drive shaft with coupling
- Use of a foot motor for easy installation
- Construction on a stable base frame
Type NF
Flange-mounting gearmotors
- NF 80
- NF 100
353/5000
The NF eccentric screw pump is a compact and cost cavity pump that is easy to install and does not require a separate base frame. With flow rates of up to 30 m³ / h, this series is a good alternative to the N series. In this series, the geared motor is bolted directly to the eccentric screw pump via a flange
Characteristics:
- 3 – 24 bar
- 4 – 360 m³/h
- Rotor: hollow or full rotors in steel / stainless steel (ss304/ss316) and hardened – depending on the application
- Different joints
- Oil-chamber housing with mechanical seals
- Stators in different elastomers (NBR, EPDM, PTFE, PU, CSM) – also available in adjustable versions for a longer service life
- Installation and maintenance without special tools
Conveying of viscous materials:
- raw materials which are reproductive like corn, grass
- substrates for Biogas production, food residues, vegetable waste
- liquid manure
- waste water
- emulsion
- sludge, slurry
- cut up fruits
- colours and lacquers …
Restressable Stator:
- 1 – 4 steps available
Dry running protection
The resistance thermometer PT 100 is used for direct temperature measurement in the stator. The thermometer includes an evaluation unit with connection cable.
Pressure gauge
As another accessory is our pressure gauge with switching contact for pressure monitoring.
Pump selection
Using the diagram, you can make the preselection of the Armatec-FTS progressing eccentric screw pumps
- Selection flow rate m³ / h
- Selection revolutions / min
- From the intersection point along characteristic curve selection pump size results in a pump N 80 for example
INDUSTRY CAVITY PUMPS QUICK Series
NF 80 + 100 / N 120 + 140
BRANCHES |SUBSTRATE
Chemical Industry: acids, bases, tensids, solvents, colors, emulsions, slurry, molasses etc.
Biogas plants: manure from cows, pigs, grass and maize silage
Agriculture: cow and pig manure
Waste water treatment plants: waste water, sewage sludge etc.
Dry matter content up to 15 %
Substrate temperature up to 45°C
pH value 6.5 – 8.5
Dynamic viscosity: owable
Partical sizes. depending on rotor/stator sizes (16-30mm)
MOTOR
Effciency class: IE 2 < 7.5 kW |I IE3 > 7,5 kW Suitable for frequency converter
Type: ange-mounting (B5) or foot-mounting (B3) Flange-mounting motor for < 7.5 kW and foot-mounting > 7.5 kW
Frequency: 50 Hz I 60 Hz
Voltage: 400 V I 460 V
Protection class: IP 55
Motor rotation speed: 1,500 rpm
Motor protection with 3 PTC thermistor
INSTALLATION
Horizontal:
Type NF: horizontally on feeds – anged motor
Type N: mounted on a base frame – foot-mounting motor
Vertical:
Type TP: submersible NF pump up to 4m tank depth
ROTOR
Hollow rotor, steel, single-stage
All rotors are hardened for a longer lifetime
Armatec FTS own design – compatible and suitable to our stators
TECHNICAL DATA
Flow rates: 5 – 120 m3/h with frequency converter Housing: galvanized steel with cleaning opening
Cardan shaft
Sealing: oil chamber with mechanical seals (on request with gland packing)
Suction and pressure nozzle: PN 16 I DN 125 – 200
STATOR
Material: SBR (NBR, EPDM, VITON etc.)
Single-stage (multible stages on request)
Adjustable for a longer lifetime
With 1⁄2” threaded sleeve for resistance thermometer for dry-running protection
OPTIONAL EXTRAS
Dry running protection, consisting of:
resistance thermometer, connecting cable, evaluation device
Pressure gauge, additional suction nozzles, joint shaft with screw conveyer
CONTROLL MANAGEMENT | FREQUENCY CONVERTER
Direct control, soft-starter or frequency converter Supplied without connecting cable
Adapted frequency converter, permitting optimum performance – on request (4 – 22 kW)
Motor with separate fan: frequency < 20 Hz