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PEI/RP1200_17 10. SHEAR VALVE INSPECTION AND TESTING 10.1 General. Shear valves are also known as emergen- cy shutoff valves, crash valves or impact valves. They are located on the product lines and sometimes on the vapor lines inside each dispenser. They must be located at grade level and securely anchored to function as intended. They immediately block fuel or vapor flow if a dispenser is dis- placed from its regular position or if a fire occurs inside the dispenser. NOTE Authorities having jurisdiction (AHJs) may require shear valves to be inspected and tested regularly. Furthermore, if a dispenser is dislodged from its normal position on the island after being hit by a vehicle or after a drive -off occurs, the shear valve should be inspected and tested for proper operation. If product is dispensed using a submersible pump, a shear valve must be present on each product riser at the base of the dispenser. 10.2 Product Shear Valves. 10.2.1 Purpose. The purpose of this test and inspection is to verify that the product shear valves are properly installed per manufacturer's specifica- tion and verify that product will no longer flow through a product shear valve that is in the closed position. 10.2.2 Description of Test. The product shear valve is inspected for proper installation per the manufacturer. The product shear valve arm is then tripped to stop the flow of fuel into the dispenser. An attempt is made to pump product through the nozzle with the shear valve in the closed position. 10.2.3 Preparation. Barricade the entire dis- penser that is to be inspected and tested so that no customers will attempt to pump fuel. Open the dis- penser cover to access the inside of the dispenser. 10.2.4 Test Equipment. Test equipment shall include: • 5 -gallon metal test can; • 11/16 -inch box wrench or properly sized wrench. 0 pei.org FIGURE 10.1. When activated by fire or impact, the shear valve closes and blocks fuel flow from the dispenser supply lines. The shear valve shown is in the closed position. 10.2.5 Test Procedure. 1. Inspect the product shear valve for proper instal- lation and anchoring. The portion of the shear valve located below the shear section must be rigidly anchored to the dispenser box frame or the concrete dispenser island using hardware and materials specifically designed for this pur- pose. If the shear valve is not properly anchored, close the shear valve, remove the dispenser from service and notify the appropriate person to have it repaired. 2. Trip the product shear valve. 3. Attempt to pump fuel through the nozzle into the test can. 4. Using the wrench, reset the product shear valve arm into the open position. 5. Place the cover back on the dispenser and remove barricades. 10.2.6 Pass/Fail Criteria. If a product shear valve meets all of the following criteria, it passes the test: