5
General
1.4 Safety instructions
The preservative is not suitable for consumption.
Do not apply more than the compression stated in the
“Specifications”
.
Compressing the filter cassettes too tightly will damage them.
The maximum inlet pressure must not be exceeded (see
“Specifications“
).
Higher pressures will damage the filter cassettes.
Do not allow any type of filter cassette to dry out to avoid loss of filtration
properties.
Make sure that the filter cassettes you plan to use have the required chemical
compatibility before beginning a filtration run in order to avoid damaging the mem-
branes. If you are not sure about the compatibility of a filter cassette with a certain
chemical, please consult your nearest Sartorius Stedim Application specialist.
Avoid abrupt changes in pressure (approximately > 1 bar/sec), such as those that can
occur when the pump is switched on or when the valves settings are changed.
Keep vibration to the lowest level that is technologically possible.
The effective compression on hydraulic holding devices should be kept constant,
especially when the holding device is installed in a large filtration system.
The maximum allowable back pressure on the permeate side must not exceed 0.5 bar
for Hydrosart
®
UF and 1 bar for PESU UF.
The outer silicone sealing of cassettes should be washed of with DI water,
after submerged storage, before installation into a cassette holding device.
Permeate backpressure is defined as follows:
Permeate pressure is higher than the Retentate pressure
P
filt
> P
ret
P
back
= P
filt
- P
ret
Hydrostatic pressure on the permeate side (height and the inner diameter of the
filtrate tubing) has an impact on backpressure.
Please make sure that the maximum backpressure pressure is never exceeded.
Note
This has to be distinguished from Transmembrane Pressure.
Transmembrane pressure (TMP):
TMP = [(p
feed
+ p
ret
)/2] - p
perm
and from Differential Pressure:
Δ
p = p
feed
- p
ret
Feed pressure (p
feed
) and retentate pressure (p
ret
), both measureable with a gauge.
Permeate pressure (p
perm
) is the average pressure on the permeate side, measureable
with a gauge.
Summary of Contents for Sartocon ECO Series
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