TÀI LIỆU - Bơm dầu trục vít Kral M Series (Screw pump series M)
4 thg 7, 2026 | 09:30

TÀI LIỆU - Bơm dầu trục vít Kral M Series (Screw pump series M)



Application 


KRAL screw pumps are apphed to deliver lubricating oil. fuel oil and other lubricating fluids. 

Main areas of application are all ranges or industry e.g. 

pumps in the oil burning industry,  transfer pumps in the loading and unloading service, lubricating pumps In the marine Industry, hydraulic. machinery and fuel oil service. 


Principle of operation 


KRAL screw pumps are self priming positive displacement pumps 

Through the speclal profile of the three screws. sealed chambers are being bulll By means of the pnnciple the pumps deliver conllnuously, without violent pressure and lurbulance, through rotation from suction side to pressure side. 


Technical data 


rotalion:  clockwise from coupling end (ant1-clockw1se 

capacity- 3 - 420 Vmrn  on  request) 

pressure:  max  40  bar 

suciJon  pressure:  up to 7 bar  (special design  up to 30 bar) 

operating  temperature  max  180 °c

viscosity:  max  7000  mm'/s 

higher values  on  request 

Type key  sample: 

M  F  U  G 

1) series K  Mj 

2)  structural shape

• flange design

• foot design

• vertical design 

F 

H 

V 

3)  salety valve

41  shaft .seal

• mechanical seal G 

• stuff packing  P 

• radlal shaft seal  R 

51  others 

• special design outSlde bearing  A 

6)  size 

Safety valve 

85 

KRAL screw pumps can be supplied either with or without safety 

valve. The valve protects the pump against  overpressure and 

must not be used as a control valve. 

Heating device 

KRAL screw pumps can be equ1ped w1lh a steam healing device 

or an electrical heating device.

Materials 

screws: 

casing 

outside casing: 

llange  cover 

end cover: 

base: 

valve casing 

Bid text 

steel nitrated 

S1lalon1.  M  15 - M  42 or nodular graphite cast rron 40

M 55-M 210 

or nodular graphite cast iron 40 

gray cast iron 20 or nodular graphite cast iron 40

gray cast iron 20 or nodular graphite cast ,ron 40

gray cast iron 20 or nodular graphite cast iron 40 

M 55-M 210 

or nodular graphite  cast iron 40

... pc(s) KRAL 3-sp,ndle screw pumps with/without 


safely valve 


type ... ... 

in toot-/llange-/base-des1gn 

for horizontal/vertical lay out 

with coupllng/couphng protectJon 

toot lantern/flange lantern 

base plate 

three phase AC  motor 50 Hz/60 Hz









LINK DOWNLOAD



Application 


KRAL screw pumps are apphed to deliver lubricating oil. fuel oil and other lubricating fluids. 

Main areas of application are all ranges or industry e.g. 

pumps in the oil burning industry,  transfer pumps in the loading and unloading service, lubricating pumps In the marine Industry, hydraulic. machinery and fuel oil service. 


Principle of operation 


KRAL screw pumps are self priming positive displacement pumps 

Through the speclal profile of the three screws. sealed chambers are being bulll By means of the pnnciple the pumps deliver conllnuously, without violent pressure and lurbulance, through rotation from suction side to pressure side. 


Technical data 


rotalion:  clockwise from coupling end (ant1-clockw1se 

capacity- 3 - 420 Vmrn  on  request) 

pressure:  max  40  bar 

suciJon  pressure:  up to 7 bar  (special design  up to 30 bar) 

operating  temperature  max  180 °c

viscosity:  max  7000  mm'/s 

higher values  on  request 

Type key  sample: 

M  F  U  G 

1) series K  Mj 

2)  structural shape

• flange design

• foot design

• vertical design 

F 

H 

V 

3)  salety valve

41  shaft .seal

• mechanical seal G 

• stuff packing  P 

• radlal shaft seal  R 

51  others 

• special design outSlde bearing  A 

6)  size 

Safety valve 

85 

KRAL screw pumps can be supplied either with or without safety 

valve. The valve protects the pump against  overpressure and 

must not be used as a control valve. 

Heating device 

KRAL screw pumps can be equ1ped w1lh a steam healing device 

or an electrical heating device.

Materials 

screws: 

casing 

outside casing: 

llange  cover 

end cover: 

base: 

valve casing 

Bid text 

steel nitrated 

S1lalon1.  M  15 - M  42 or nodular graphite cast rron 40

M 55-M 210 

or nodular graphite cast iron 40 

gray cast iron 20 or nodular graphite cast iron 40

gray cast iron 20 or nodular graphite cast ,ron 40

gray cast iron 20 or nodular graphite cast iron 40 

M 55-M 210 

or nodular graphite  cast iron 40

... pc(s) KRAL 3-sp,ndle screw pumps with/without 


safely valve 


type ... ... 

in toot-/llange-/base-des1gn 

for horizontal/vertical lay out 

with coupllng/couphng protectJon 

toot lantern/flange lantern 

base plate 

three phase AC  motor 50 Hz/60 Hz









LINK DOWNLOAD




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