Shear valves, Shear valves -10 – Gasboy Atlas Fuel Systems Installation Manual User Manual
Page 72
Reference Information
Plumbing Requirements
Page 7-10 MDE-4331M Atlas® Fuel Systems Installation Manual · September 2014
Shear Valves
(Generally Used on Dispensers Only)
Note: Shear valves are not required on pumps but installation is discretionary.
See “PEI Publication RP100 Recommended Practices for Installation of Underground Liquid
Storage Systems (Chapter 9)” and “PEI Publication RP200 Recommended Practices for
Installation of Aboveground Storage Systems for Motor Vehicle Fueling”. A shear valve
) is an NFPA 30A required safety device. It closes automatically to stop the
product flow during a fire or if the dispenser gets knocked off the island. It also provides a
means of manually closing inlet pipes.
Follow the shear valve manufacturer’s instructions for installation procedures and testing.
Install a shear valve on each product inlet pipe.
• Install a shear valve on a master dispenser satellite outlet and at satellite inlet.
• Do not mount the shear valve upside down.
• Ensure that the valve linkage is accessible and displays no interference while opening or
closing, from other piping, structure, or components.
Note: The dispenser product inlet pipes has to be aligned with the shear valve.
Do not restrict the shear valve linkage with pipes, braces, and so on.
• Test the shear valve operation.
• Close the shear valve until the startup of the equipment. Cap the inlet pipe. This prevents
dirt and other particles from entering the product line. It also prevents fuel spillage.
Figure 7-4: Shear Valve
Shear Valve groove location must be flush to
the island surface +/-1/4-inch.
Shear Groove
Island Surface
Product Inlet Pipe
Shear Valve
Note: For model 9850KXTW1, refer to
“Model 9850KXTW1 Shear Valve Configuration”
. Follow manufacturer’s installation instructions. Anchoring requirements
noted within this section apply.