15
9
Faults
Chapter 11.3 “Fault table”, Page 19
with regard to
faults, possible causes and remedies.
9.1
Safety notices
Hot device surface
Skin burns from touching the pump. The pump may become
very hot when conveying hot pumped media.
Before undertaking work on pump, allow the pump to cool
off completely.
Check the temperature before touching.
Only touch the pump with heat-resistant protective gloves.
10 Maintenance
Chapter 11.2 “Maintenance intervals”, Page 18
re-
garding maintenance intervals.
10.1 Safety notices
Rotating parts
Personal injury and property damage.
Before working on the pump,
always
switch off the pump’s
motor and secure against reactivation.
Falling or unsecured components
Severe bruises.
Always wear safety shoes during all maintenance work.
Uncontrolled escape of liquids
Personal injury and property damage caused by chemical burns,
poisoning or contamination.
Before performing maintenance and cleaning work on the
pump:
Close the suction and discharge valves upstream and
downstream of the pump.
Double shaft seal: Shut the barrier or quench fluid line.
Completely drain the pump housing before opening the
pump.
Sudden cooling of the pump
Stress cracks in the pump.
Do not abruptly cool the pump.
Using hard screwdriving tools
Scratching of milled surfaces.
Use a copper insert for socket wrenches on milled surfaces.
10.2 Spare parts
Using spare parts not approved by
Fristam
may result in serious
personal injury and property damage. Please contact
Fristam
for
any questions regarding approved spare parts.
Fristam
maintains a record of all pumps delivered. The following
information is required when ordering spare parts:
1. Serial number of the pump: refer to the nameplate or the
rim on the pump.
2. For designations of spare parts and materials, please refer to
“Order documents”
in the accompanying documents.
10.3 Check the barrier and quench fluid (optio-
nal)
For pumps that have been equipped for “barrier fluid” or
“quench fluid”, the quench fluid pressure must be checked. For
maintenance intervals refer to
.
Check the barrier fluid pressure and compare to the speci-
fied value.
For the specified value please refer to the
“Data sheet”
in the
“Order documents”
. The
“Order documents”
are enclosed with
this operating guide.
A hot pumped medium and operation of the pump cause the
barrier fluid to become heated.
Make sure that the temperature of the barrier fluid is main-
tained at T < 70°C during operation.
10.4 Check the oil level
This check is performed via an oil level gauge
located on
the back of the closing cap.
For maintenance intervals refer to
10.5 Change oil
Change the oil regularly on the FDS twin screw pumps. For
maintenance intervals refer to
.
Maintenance intervals
In general, change the oil once each year or every 4000 opera-
ting hours.
In extreme operating conditions, such as high humidity, an ag-
gressive environment, high temperature fluctuations, etc., we
recommend changing the oil every 2000 operating hours.
