IM-P150-07
ST Issue 4
7
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.
A typical installation is shown in Figure 2, page 9.
3.3
Remove protective covers from all connections and protective film from all name-plates,
where appropriate, before intallation on steam or other high temperature applications.
3.4
The preferred installation is in a horizontal pipe with the name-plate uppermost.
The trap will operate in other positions, but the service life may be affected! The
installation should have a small drop leg preceding the trap. Access for removal of
the integral strainer screen should also be provided.
3.5
Suitable isolation valves must be installed to allow for safe maintenance and trap
replacement.
Where the trap discharges into a closed return system a non-return valve should be fitted
downstream to prevent flow.
3.6
Always open isolation valves slowly until normal operating conditions are achieved - this
will avoid system shocks. Check for leaks and correct operation.
3.7
Always ensure the correct tools, safety procedures and protective equipment are used
at all times.
3.8
The disc and seating surfaces of these traps have been produced to a high degree of
flatness to achieve good shut-off under high pressure conditions. An integral strainer
helps prevent dirt and scale from entering the trap. If particles become entrapped between
the disc and seat, the high flow velocities can cause rapid wear and erosion. A separate
strainer and / or dirt pocket will provide additional protection.
3.9
When a socket weld or butt weld trap is being installed the welding should be carried
out to an approved proceedure of a recognised standard.
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).