Hach 9525sc Degas System Manual Del Usuario página 12

• An approximate temperature of 25 °C (77 °F)
• Clean with no suspended solids and a low hardness
• Low in chlorides because chlorides can cause corrosion in the stainless steel coil and shell
Connect the cooling water as follows:
1. Use a 3/8-inch NPT (national pipe thread) connection to connect the tubing to the cooling water
outlet at the top of the cooler. Refer to
2. Use a 3/8-inch NPT connection to connect tubing to the cooling water inlet at the bottom of the
cooler. As an alternative, connect the tubing to the cooling water inlet at the top of the cooler.
Figure 6 Cooling water plumbing
1 Cooling water inlet (alternative)
2 Cooling water outlet
4.3.3 Connect the sample lines
Burn hazard. Obey safe handling protocols during contact with steam.
Make sure that the samples supplied to the instrument are at a temperature of 25 °C ± 1 °C (77 °F ±
2 °F). Make sure the pressure is controlled by a back pressure regulator or a head cup to keep a
constant sample flow rate.
Install the needle valve/rotameter on the sample inlet before the degas unit. If the 9523sc cation
conductivity panel is used, install the needle valve/rotameter on the sample inlet before the cation
conductivity panel.
Install the flow cells in an orientation that keeps the water level near the crossover section of the
degas chamber. The sample outlet from the panel must be level with the crossover section of the
degas chamber.
Incorrect release of steam from the degas chamber or incorrect flow cell locations can have an
unwanted effect on the performance of the system.
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Figure 6. Make sure that the outlet drains into a floor drain.
3 Shutoff valve
4 Cooling water inlet
W A R N I N G