Johnson Pump SPX Flow CombiLineBloc, Instruction Manual

Page: 17 / 67

CLB/EN (1901) 6.6
General 15
CombiLineBloc
2.6 Construction
2.6.1 Design
The design is characterized by a compact construction. The pump is mounted to a
standard IEC flange motor by means of a lantern piece and a stub shaft. The pump cover
is clamped between the pump casing and the lantern piece.
The electric motors up to and including frame size 112M have B5 mounting arrangement
and the larger types have B3/B5 mounting arrangement. All vertically placed motors
have mounting arrangement V1.
2.6.2 Pump casing/impeller
• The pump casing is of the volute type. Suction and delivery flange are placed in-line
and have the same flange size.
• The specially shaped suction bend ensures low-noise functioning of the pump and
favorable NPSH values.
• The impeller is of the closed type and is mounted directly on the end of the stub shaft.
The impeller is fixed by means of a cap nut.
2.6.3 Mechanical seal
The pump is provided with a mechanical seal with mounting dimensions according to EN
12756 (L
1K
) (DIN 24960 (L
1K
)). This mechanical seal can be used up to a working
pressure of 10 bar and a temperature of 120 °C (peak values of 140 °C).
2.6.4 Bearing construction
The bearing is provided by the motor bearings. The selection of the motor-pump
combination is such that the bearings of the applied electric motors can absorb the axial
and radial forces without the bearing life being affected.
The electric motors must be provided with a fixed bearing .