Compressed air is supplied from the main to chamber 1 (Fig. a). Chamber 2 is the valve outlet and port 3 is connected to the atmosphere. When button 4 is pressed, compressing spring 5, the plunger linked to the button is pushed off its seat. Air from chamber 1 passes through a row of ports 6 into outlet chamber 2. When button 4 is released, it is returned, together with the plunger, by spring 5 to its initial position, shutting off air flow into chamber 2. When button 7 is pressed, compressing spring 8, the plunger linked to this button is pushed off its seat, and outlet chamber 2 is connected to the atmosphere through ports 9 and 3. This valve is designed with a pistol grip and is portable. The principle of the valve is shown schematically in Figs. b and c: with button 4 pressed (Fig. b), and with button 7 pressed (Fig. c).
$3684$SHP,FC$