IM-P068-25 ST Issue 28
After installation or maintenance ensure that the system is fully functional. Carry out tests on
any alarms or protective devices.
4. Commissioning
The thermodynamic steam trap will discharge condensate with a blast type action at a few
degrees below steam saturation temperature, due care must be given to the site of
the discharge.
5. Operation
3. Installation
Note:
Before actioning any installation observe the 'Safety information' in Section 1.
Referring to the Installation and Maintenance Instructions, name-plate and Technical
Information Sheet, check that the product is suitable for the intended installation:
3.1 Check materials, pressure and temperature and their maximum values. If the maximum
operating limit of the product is lower than that of the system in which it is being fitted,
ensure that a safety device is included in the system to prevent overpressurisation.
3.2 Determine the correct installation situation and the direction of fluid flow.
3.3 Remove protection covers from all connections and protective film from all name-plates,
where appropriate, before installation on steam or other high temperature applications.
3.4 The trap should preferably be installed in the horizontal plane, with a small drop leg
preceding it. Suitable isolation valves must be installed to allow for safe maintenance
and trap replacement. Consideration should be given to a suitable method for testing
the correct operation of the trap. This may be a sight glass or a Spiratec system. Sight
glasses must be positioned a minimum of 1 m (3 ft) downstream of any blast-action traps.
Where the trap discharges into a closed return system, a non-return valve should be fitted
downstream to prevent return flow.
3.5 Welding of a steam trap - When a socket weld or butt weld TD3-3 thermodynamic
steam trap is being installed the welding should be in accordance with an approved weld
procedure of a recognised standard using approved welders.
3.6 Isolation valves must be installed to allow for safe maintenance and trap replacement.
3.7 Always open isolation valves slowly until normal operating conditions are achieved -
this will avoid system shocks. Check for leaks and correct operation.
Note: If the trap is to discharge to atmosphere ensure it is to a safe place, the discharging
fluid may be at a temperature of 100°C (212°F).
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