Leak Test The System - Edwards XDS35iC Instruction Manual

WARNING:
If pumping for a prolonged period above 100 mbar inlet pressure, use an exhaust
silencer (refer to
Before connecting the pump to the vacuum system, remove the plastic cap from the
inlet and exhaust and ensure the inlet strainer is fitted to the pump inlet port. Use
appropriate NW40 vacuum fittings for connection to the system.
Take note of the following information when connecting the pump to the vacuum
system.
▪ To minimise noise and exhaust emissions, it is recommended that the pump is
connected to an exhaust line or a silencer (refer to
▪ For optimum pumping speeds, ensure that the pipeline connected to the pump
inlet is as short as possible and has a suitable internal diameter.
▪ Support the vacuum pipeline to prevent loading of the coupling joints.
▪ If the pump is operated with the exhaust line blocked, a pressure of 5.5 bar(a) may
be generated in the exhaust pipework. Connect the pump using appropriate
pipework and fittings.
▪ If necessary, incorporate flexible bellows in the system pipelines to reduce the
transmission of vibration and prevent loading of the coupling joints. If using
flexible bellows, ensure the use of bellows that have a maximum pressure rating
which is greater than the highest pressure that can be generated in the system.
The use of manufacturer's bellows is recommended.
▪ Incorporate an inlet isolation valve in the pipeline between the vacuum system and
pump. This will isolate the vacuum system from the pump when it is switched off
and prevent the suck‑back of process gases and debris into the vacuum system.
▪ Ensure that the sealing surfaces are clean and scratch‑free.
We recommend the use of an exhaust extraction system suitable for use with all process
gases being pumped. Ensure that the exhaust extraction system cannot become blocked
or obstructed when the pump is operating.
A small amount of tip seal wear dust may collect in the exhaust duct of the pump. The
dust may be blown out with the initial burst of air after the pump has been vented. This
is quite common and the amount of dust seen will reduce over time.

4.7 Leak test the system

Leak test the system and seal any leaks found after installing the pump.
A73001880_N
A73001880_N - Installation
Silencer on page 35) or connect to an appropriate exhaust line.
Page 22
Silencer on page 35).
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