Strainers Technical Data - Eaton Corporation

STRAINERS TECHNICAL DATA

Pressure Drop Calculations
To accurately calculate the pressure loss for filters and strainers in a pipeline, proceed as follows:

First calculate pressure loss using Cv factor formula at right
Take the pressure loss figure obtained in (1) and recalculate it using the appropriate correction factor from the following tables.

Pressure Loss Calculation Using Cv Factor

The pressure loss across a strainer or filter can be calculated using the system's flow rate and the Cv factor for that strainer or filter.

For example, a 1 " strainer with a Cv factor of 8 will have a 4 psi pressure loss in a system with a 16 gpm flow rate: (16 ÷ 8) 2 = 4.

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Correction Factors for Mesh-Lined Basket

Water Only
Multiply the pressure drop for perforated baskets by the following.

Fluids Other Than Water
First-Multiply the pressure drop for water shown in charts by the specific gravity of the liquid. Second-Multiply the corrected pressure drop figure by the following correction factors for more viscous liquids. (Water has a viscosity of 30 SSU.)
Viscosity (SSU)	Unlined Perforated Basket	40 Mesh Lined Basket	60 Mesh Lined Basket	80 Mesh Lined Basket	100 Mesh Lined Basket	200 Mesh Lined Basket	325 Mesh Lined Basket
500	1.6	1.9	2.1	2.4	2.6	3.1	3.6
1000	1.7	2.2	2.4	2.6	2.8	3.3	3.8
2000	1.9	2.4	2.7	2.9	3.2	3.8	4.0
3000	2.0	2.6	2.9	3.2	3.5	4.1	4.3
5000	2.2	3.0	3.5	4.0	4.5	5.3	6.3
10000	2.5	3.5	4.2	5.0	6.0	7.1	8.5

Strainer Basket Opening Equivalents

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