IM-IBR16-32IN
Issue 1
12
6. Maintenance
Note
Before conducting any maintenance activities observe the 'Safety information' in
Section 1.
Warnings
The gaskets contained in this product incorporate a thin stainless steel support ring,
which may cause physical injury if not handled and disposed of carefully.
The strainer screen is manufactured from sheared perforated sheet which may
cause physical injury if not handled and disposed of carefully.
6.1 General information
With suitable isolation, maintenance or repairs can be completed with the trap in the pipeline
once the safety procedures have been observed. In particular, prior to any maintenance
ensure that the trap is isolated, that no pressure exists within the unit and that components
can be handled without the risk of causing burns, either by allowing the trap time to cool or
by wearing thermal insulating gloves. It is recommended that new gaskets and spares are
used whenever maintenance is undertaken and that when reassembling, all joint faces are
clean. Ensure that the correct tools and necessary protective equipment are used at all times
and recommended torque values documented in Table 1 (page 20) are adhered to. When
maintenance is complete open isolation valves slowly and check for leaks.
6.2 Recommended service intervals
If installed and maintained in accordance with these instructions the trap will give many
years of trouble free operation. However, it is recommended that the trap receives an annual
inspection to give early warning of any potential issues and save the plant from unscheduled
interruptions.
6.3 How to access, replace or clean the strainer screen
The strainer screen (
8
) is located on the inlet side of the trap and is housed in a pocket
which is covered by a circular strainer flange (
7
) and retained by 4 off strainer nuts (
11
).
-
Ensure the trap is depressurised (see 'Section 6.1 - General information')
-
Unscrew the 4 off strainer nuts (
11
), lift off the strainer flange (
7
) and remove the strainer
gasket (
9
).
-
Withdraw the strainer screen (
8
) by pulling it out of its pocket wearing suitable gloves to
guard against physical injury.
-
Clean the strainer screen (
8
) or replace it, as required.
-
Fit the cleaned or new strainer screen (
8
) by pushing it back into the trap, with the opening
in the screen toward the inlet.
-
Clean both gasket faces, fit a new strainer gasket (
9
), fit the strainer flange (
7
) and tighten
the 4 strainer nuts (
11
) to the recommended tightening torque (see Figure 5, page 13).
The recommended bolting sequence and procedure is also given in Figure 5.