Teledyne Everywhereyoulook BLZZRD, Installation And Operation Manual

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BLZZRD ™ Portable Refrigerated Sampler
Section 2 Installation/Preparation
2-17
Figure 2-19 Attaching the suction line to the pump tubing
2.8 Attaching a Strainer
Teledyne ISCO offers three styles of strainer that help prevent
solids from clogging the suction line:
•
3
/
8
-inch standard weighted polypropylene strainer for
routine and priority-pollutant sampling
•
3
/
8
-inch stainless steel low flow strainer
•
3
/
8
-inch weighted CPVC-coated strainer for acidic liquid
sources
To select the right strainer for your application, see Table 2-1. To
install the strainer, carefully screw the strainer’s threaded con -
nector into the suction line. If attaching the strainer to a PTFE
suction line, heat the end of the PTFE suction line before
threading the strainer into the line. Warming the line will make
the line more pliable to avoid damage.
2.8.1 Alternative to Strainers When sampling from high velocity streams with heavy sus-
pended solids, some field investigations suggest that more repre-
sentative samples are obtained without the strainer. Consider
attaching a short piece of thin walled aluminum tubing to the
end of the suction line; anchor the tubing so that the inlet opens
upstream. The aluminum tubing’s thin wall will not disturb the
flow stream, and most sample analyses disregard aluminum
ions. Under most conditions, the pre-sample purge removes any
debris over the tubing entrance.
1.
2.