Teledyne 6712FR Strainers, 2 Selecting the Right Strainer, Dimensions, Application Maximum Depth

Models: 6712FR

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2.4 Strainers

6712FR Refrigerated Sampler

Section 2 Installation/Preparation

2.4 Strainers

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

• Weighted CPVC-coated strainer for acidic liquid sources To select the right strainer for your application, see Table 2-2.

To install the optional low flow strainer in PTFE suction line, heat the end of the suction line to make it more pliable, then carefully screw the strainer’s threaded connector into the suction line.

2.4.1Alternative 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.

Table 2-2 Selecting the Right Strainer

Strainer

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Dimensions

 

 

 

 

 

Application Maximum Depth
3/8 Stainless

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

10.5

 

 

 

 

 

 

 

Routine

Vinyl Line:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Steel Ends,

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

applica -

22 feet (6.7m).

Polypropylene

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

tions.

PTFE Line:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Center

.400

 

 

 

 

 

 

 

 

 

 

 

1-1/4

 

 

15 feet (4.5m).

 

 

 

 

 

 

 

 

Diameter

 

 

Diameter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

Low flow

Vinyl Line:

3/8

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

applica -

22 feet (6.7m).

Stainless Steel

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

.400

 

 

 

 

 

 

 

 

 

 

tions

PTFE Line:

Low Flow

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

diameter

.562

 

 

 

15 feet (4.5m).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

diameter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

11.5

 

 

 

 

 

Highly

Vinyl Line:

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3/8

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

acidic

4 feet (1.2m).

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

liquids.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

CPVC

.400

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

diameter

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1- 5/16 Diameter

Table 2-2 Selecting the Right StrainerStrainerDimensionsApplication Maximum Depth3/8 Stainless Note

The suction lines will float when filled with air during the purge cycles and when depths exceed the listed ratings. Secure the suction lines when sampling at depths exceeding the maximum ratings.

All strainer dimensions are in inches.

PTFE suction line is compatible only with the 3/8 stainless steel strainer.

2-8

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Teledyne Strainers, 2 Selecting the Right Strainer, 6712FR Refrigerated Sampler Installation/Preparation, Dimensions