The Schultz 3-Way Differential Pressure Test Valve is designed to allow a hydraulic test movement of the D/P gauge piston. This is done by venting the lower piston chamber, and allowing the line pressure to drive the piston into its maximum low position. During this test, you observe the piston's movement to insure smooth and continuous operation.
 
To perform this test, the filter must be flowing fuel through the system. With 3 - way valve clockwise, observe the pistons movement to scale. The valve will automatically return the gauge to its normal operation pressure when the handle is released.
 
Valve may be mounted on the bottom of the gauge, or remotely installed on panels or walls, using tubing.
 
FEATURES 
Works with two ranges of D/P Gauges:
( 1 ) 0 - 15 psi
( 2 ) 0 - 30 psi
Stainless Steel & Aluminum Alloy
Seals, Viton & Teflon
Stainless Steel Ball
Single hand Test Operation
Stop Pins to prevent Seal Damage
 
CLICK HERE FOR SPEC SHEET