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PEI/RP1200 = 17 10 . SHEAF VALVE INSPECTION AND TESTING r 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 r ' 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 r 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 FIGURE 104. When activated by fire or the dispenser. impact, the shear valve closes and blocks fuel flow from the dispenser supply lines. The 10. 2 Product Shear Valves . shear valve shown is in the closed position. 10 . 2. 1 Purpose. The purpose of this test and 10.2. 5 Test Procedure. inspection is to verify that the product shear valves are properly installed per manufacturer ' s specifica- 1. Inspect the product shear valve for proper instal- tion and verify that product will no longer flow lation and anchoring. The portion of the shear through a product shear valve that is in the closed valve located below the shear section must be position , rigidly anchored to the dispenser box frame or the concrete dispenser island using hardware 10. 2.2 Description of Test . The product shear and materials specifically designed for this pur- valve is inspected for proper installation per the pose . If the shear valve is not properly anchored, manufacturer. The product shear valve arm is then close the shear valve, remove the dispenser from tripped to stop the flow of fuel into the dispenser, service and notify the appropriate person to have An attempt is made to pump product through the ft repaired. nozzle with the shear valve in the closed position. 2. Trip the product shear valve. 10.2. 3 Preparation . Barricade the entire dis- 3 . Attempt to pump fuel through the nozzle into the penser that is to be inspected and tested so that no test can. customers will attempt to pump fuel. Open the dis- penser cover to access the inside of the dispenser. 4. Using the wrench, reset the product shear valve arm into the open position . 10 . 2 .4 Test Equipment . Test equipment shall include : 5. Place the cover back on the dispenser and remove barricades . • 5-gallon metal test can; 11 / 16 -inch box wrench or properly sized 10. 2. 6 Pass/ Fail Criteria . If a product shear • valve meets all of the following criteria, it passes wrench. the test: c pei . org it