Specifications
Hoses
8.
Hoses
8.1
Connecting Hoses
@
Pump nozzle
A:
return flow from external object
outlet to external object (pressure side)
Hoses are normally used to connect the pump with an exter-
nal vessel.
If
objects are to be temperature controlled in the
internal bath only, the pump nozzles
A
can be closed with a
,
.
3
@
covering plate
D
attached with a union nut
E
(supplied as
L.
standard). However, in order to achieve a better temperature
constancy, it is recommended not to close but to connect the
A
D
E
two nozzles with
a
short hose with
a
min.
length of
50
cm.
General recommendations concerning the
max. allowable
length of hoses cannot
be given. It all depends largely on the
size, form and material of the external vessel to
be
tempera-
ture controlled. It should be understood that the length of
a
hose and its diameter combined with the circulating capacity
have a large effect on the temperature control effectiveness.
Whenever possible, the decision should be made in favor of
the wider hose diameter and the vessel to be temperature
controlled should be placed as close as possible to the circu-
lator.
!
High operating temperatures will lead to high tem-
peratures on the hose surface, this is even more so
at the metal
nozzles. In this case:
DO
NOT TOUCH!
!
The required hose material
is
dependent on the
heat transfer liquid used.
!
Hoses must not be folded or bent!
A
wide
radius should
be
used
if
turns have to be
made!
!
Hoses may become brittle after prolonged use or
they may get very soft. They should, therefore, be
checked regularly and exchanged
if
necessary!
!
Secure all hose connections using hose
clamps!
8.2
Selecting Hoses
Thermo Haake circulators will be delivered without any
hoses. Due to the unknown application at the time of ship-
ment and the extremely wide temperature range of the circu-
lators it became impossible to deliver hoses as standard
accessories. Please select the proper hoses from the follow-
ing table.