User Manual

CVS4200 / BVS4300 Stationary Samplers

sample). TABLE 5-5 outlines the key changes made to the sampler for a

sanitary system.

TABLE 5-5. Sanitary System Changes

Component Standard Material Sanitary System Material

Intake Tube PVC Teflon-Lined PVC

Sinker/Strainer Lead Sinker Stainless Steel Sinker/Strainer

Fittings Brass Stainless Steel

Metering Chamber Acrylic Pyrex

Metering Chamber Cover Delrin Teflon with Steel Bracing Ring

Discharge Tube Latex Silicone

Sample Container(s) HDPE (or polypropylene (PP)) Glass

O-Rings Buna-N (or Viton) Silicone

5.5.3 Pressurized Source

Special care must be taken in applications with back pressure so that the

sampler does not become flooded. Options for pressurized situations include:

1. Relocate the sampler. Although it may be located farther from the

source, the CVS/BVS vacuum system is able to handle long draws and can

be moved to a location (higher) where back-pressure is not an issue.

2. Looping the intake tube. For small amounts of pressure, looping the

intake tube up to a height that the water pressure cannot push above is a

simple way of getting around the issue. The maximum height would be

the maximum vertical draw, 3.4 m (27.5 ft).

We recommend using a valve with external valve control in this

kind of situation, to be on the same side. See FIGURE 5-8.

NOTE

FIGURE 5-8. Vertical loop for pressurized source