Technical Data Select the same nominal size safety valve as the hose size leading to the respective air tool. Air flow must be in the direction of the arrow marked on the check valve. A safety check valve should be installed for use before each air tool. The actual length of hose from safety check valve to air tool must not exceed a certain length depending on inlet pressure (see chart). The volume of air flow (CFM) through an air line will vary according to its length. A longer line will offer more resistance to flow and thus reduce the volume. The length of a hose extending from the safety valve to the air tool must, therefore, be limited to a certain length to insure sufficient flow to trigger the safety valve in case of break. Check graph for hose length limitations. The closing flow rate (CFM) at various inlet pressure can be obtained from the flow rate chart. Note: Nominal size of valve and connecting hose must be consistent. i.e. 1/4" valve to be used with 1/4" hose. Caution: Do not reduce safety valves with bushings for use with a smaller airline. If this is done , there will not be a sufficient CFM flow during a line break to shut off the air flow through the safety valve. (See Technical Data) |
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