Scanpump PN25 BK NK
2
Applications The BK pumps are used for most liquid within the pulp and paper industry, ideal for handling high temperature up to 300°C and high pressure in digester applications. They can also be used for district heating installations. The NK pumps are used within the process industry, spe- cially designed to handle all kinds of clean or polluted liquids including hydrocarbons as well as aggressive chemical where PN 25 pressure rating or high temperature is required. Design The NK and BK pumps are part of the Scanpump Modular System ensuring high interchangeability and minimized spare part costs. Apart from the pressure containing parts the NK and BK pumps have identical parts as the BA and NB series. Pump casing The sturdy construction gives good protection against erosion and corrosion. The support feet are at shaft centreline height, preventing distortion and misalignment due to expansions when pumping hot liquids. Casing cover and lantern The cover is retained in the casing by the lantern, both of which are therefore pressure containing parts and designed accord- ing to the PN 25 pressure rating of these pumps. The gasket is confined. Impeller NK pumps are normally fitted with closed (shrouded) impel- lers, whilst the BK pumps have semi-open impellers and casing wear discs. The impellers are locked onto the shaft by a key and screw design, except for the smallest NK pumps (built on bearing as- sembly size 1) which have the impeller screwed onto the shaft, giving improved flow conditions at the impeller eye. Shaft The shafts are sturdy and the shaft deflection at the seal posi- tion area under normal running conditions is less than 0.05 mm, promoting long shaft seal life. Shaft seals NK and BK pumps are fitted with Scanpump seal cartridge modules. The alternatives include single and double mechani- cal seals and gland packings. Cooling Cooling of the gland by circulating liquid is option. In addition, the bearing units are air cooled as a standard arrangement on the larger pumps by an externally mounted fan and this same arrangement can be fitted optionally on the smaller pumps, bearing assembly 3, as well. SCANPUMP PN 25 PUMPS BK AND NK Properties Your benefits * High reliability. Sturdy design for high pressures and tem- peratures, rated PN25, ANSI 300. Centreline design, prevent- ing distortion and misalignment. * Low power consumption. The pumps exhibit high efficiencies - the largest size peaks 89%. * Simplified and fast service. Included in the Scanpump Modu- lar System ensuring high interchangeability and minimizes spare part costs. 50 Hz Capacity 5-3500m 3 /h Head 5-170m Temperature Max. 300°C depending on size and material Pressure rating PN25 Flanges ISO 7005 PN25 ANSI class 300 Lubrication Grease or oil Norm ISO 5199 ”technical specification for centrifugal pumps, class II
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Transcript of Scanpump PN25 BK NK
ApplicationsThe BK pumps are used for most liquid within the pulp and paper industry, ideal for handling high temperature up to 300°C and high pressure in digester applications. They can also be used for district heating installations.
The NK pumps are used within the process industry, spe-cially designed to handle all kinds of clean or polluted liquids including hydrocarbons as well as aggressive chemical where PN 25 pressure rating or high temperature is required.
DesignThe NK and BK pumps are part of the Scanpump Modular System ensuring high interchangeability and minimized spare part costs.
Apart from the pressure containing parts the NK and BK pumps have identical parts as the BA and NB series.
Pump casingThe sturdy construction gives good protection against erosion and corrosion. The support feet are at shaft centreline height, preventing distortion and misalignment due to expansions when pumping hot liquids.
Casing cover and lanternThe cover is retained in the casing by the lantern, both of which are therefore pressure containing parts and designed accord-ing to the PN 25 pressure rating of these pumps. The gasket is confined.
ImpellerNK pumps are normally fitted with closed (shrouded) impel-lers, whilst the BK pumps have semi-open impellers and casing wear discs.
The impellers are locked onto the shaft by a key and screw design, except for the smallest NK pumps (built on bearing as-sembly size 1) which have the impeller screwed onto the shaft, giving improved flow conditions at the impeller eye.
Shaft The shafts are sturdy and the shaft deflection at the seal posi-tion area under normal running conditions is less than 0.05 mm, promoting long shaft seal life.
Shaft sealsNK and BK pumps are fitted with Scanpump seal cartridge modules. The alternatives include single and double mechani-cal seals and gland packings.
CoolingCooling of the gland by circulating liquid is option. In addition, the bearing units are air cooled as a standard arrangement on the larger pumps by an externally mounted fan and this same arrangement can be fitted optionally on the smaller pumps, bearing assembly 3, as well.
SCANPUMP PN 25 PUMPS BK AND NK
Properties
Your benefits
* High reliability. Sturdy design for high pressures and tem-peratures, rated PN25, ANSI 300. Centreline design, prevent-ing distortion and misalignment.
* Low power consumption. The pumps exhibit high efficiencies - the largest size peaks 89%.
* Simplified and fast service. Included in the Scanpump Modu-lar System ensuring high interchangeability and minimizes spare part costs.
50 Hz
Capacity 5-3500m3/h
Head 5-170m
Temperature Max. 300°C depending on size and
material
Pressure rating PN25
Flanges ISO 7005 PN25 ANSI class 300
Lubrication Grease or oil
Norm ISO 5199 ”technical specification for
centrifugal pumps, class II
Standard material combinations
Code 08 09 24 26
Pump casing Nodular iron Nodular iron Duplex stainless Stainless
Casing cover 0717 0717 steel 2324 steel 2343
Impeller Duplex stainless Duplex stainless Duplex stainless Stainless
steel 2324 steel 2324 steel 2324 steel 2343
Shaft Duplex stainless Duplex stainless Duplex stainless Duplex stainless
steel 2324 steel 2324 steel 2324 steel 2324
Shaft sleeve Duplex stainless Duplex stainless Duplex stainless Duplex stainless
steel 2324 steel 2324 steel 2324 steel 2324
BK Pump series
250 Inlet dia.
(mm)
200 Outlet dia.
(mm)
-48 Impeller dia.
(cm)
1 2 3 4 6
m200
100
5040
30
20
10
52 5 10 50 100 500 1000 5000 m3/h
1 2 5 10 50 100 500 1000 l/s
250/ 200-43
300/ 250 -43
990 rpm
740 rpm
250/250 -32
400/350-48
250/150-67
250/
300/200-67
200-48
980 rpm50/32-20
65/40-26
80/50-20
100/65-26
125/100-32
125/100-40
150/125-32 200/150-32
200/150 -40
200/150-48
100/65-262980 rpm
65/40-262950 rpm
50/32-202950 rpm
980 rpm980 rpm
1500 rpm
Bearing assembly sizes
Materials
Type designations Performance curves
BK 250/200-48
Scan
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K a
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K (5
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GB
201
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