/ / FDS TWIN SCREW PUMPS / / /
8
3.1.2
Coupling (B)
The coupling connects the shaft from the motor to the drive
shaft
of the pump. The coupling transfers the drive torque of
the (gear) motor to the pump.
3.1.3
Motor/gear motor (C)
The drive is an electric motor with fixed or variable speed. It is
bolted to the base frame or foundation.
3.2
General remarks
The following versions are available as an option for all configu-
rations:
– single or double shaft seal
One of two seal types can be selected: Single shaft seal or
double shaft seal.
In the double shaft seal version, there are four additional
ports for the barrier fluid on the intermediate flange. These
ports are not depicted in the illustrations in this operating
guide; see
Chapter 6.8.1 “Connect pipelines”, Page 12
.
– horizontal or vertical pump connection,
– heating jacket
The pump can be equipped with a heating jacket on the
pump housing.
3.3
Sizes
3.4
Add-ons
FDS twin screw pumps may be equipped with the following
add-ons, among others:
– Lining
Stainless steel lining for the motor. The lining is attached to
the base frame,
– Domed feet
Domed feet on which to install the pump. Domed feet are
mounted on the base frame of the pump.
Additional add-ons are possible. Please contact
Fristam
if you
have any questions.
3.5
Type designation
Fig. 5
Type designation example
Note: If your pump is delivered without a motor (optional) begin
by reading
Chapter 12 “Appendix 2 – Assembly instructions (optio-
nal) for pump with bare shaft”, Page 22
Intermediate flange
Leakage chamber of the shaft seal
Bearing bracket
Drive shaft
FDS series
FDS 1
FDS 2
FDS 3
FDS 4
FDS 5
Table 1 Sizes
Pump type
Size
Displacement device
Additional symbol 1
Additional symbol 2
FDS
Twin screw pump, self-priming
X
Number of size
X
Number of the installed displacement device
(10) Additional symbol 1
V
vertical
S
lateral
–
no symbol means standard
(11) Additional symbol 2
L
extended
7
9
10
8
11
FDS 3 - 3 V L