This document provides a selection guide for pressure switch products.
This document serves as a selection guide for Barksdale pressure switch products. It outlines the critical factors to consider when choosing a switch, including expected service life, cycling speed, and media compatibility. The guide explains the differences between bourdon tube, diaphragm, and piston switch types and provides criteria for selecting the appropriate sensing element based on cycle counts and pressure surge requirements.
| Diaphragm switch adjustable range | vacuum to 150 psi |
|---|---|
| Diaphragm switch proof pressure | 300 psi |
| Bourdon tube switch adjustable range | 18,000 psi |
| Bourdon tube switch proof pressure | 24,000 psi |
| Piston switch adjustable range | 12,000 psi |
| Piston switch proof pressure | 20,000 psi |
| Maximum cycling rate for piston type | more than once every three seconds |
Use of either a bourdon tube or diaphragm switch is indicated.
A piston type switch should be specified if the switch is expected to cycle more than once every three seconds.
The proof pressure is 20,000 psi.