0584t90 of Perko Fuel Inlet Check Valve - NPTF Threaded, 90 Degree Hose Port, EPA Compliant
0584t90 of Perko Fuel Inlet Check Valve - NPTF Threaded, 90 Degree Hose Port, EPA Compliant
angle view of Perko Fuel Inlet Check Valve - NPTF Threaded, 90 Degree Hose Port, EPA Compliant
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NPTF Threaded Inlet Check Valve- 90 Deg Port, EPA

90 Degree Hose Port | For Aluminum Tanks | Fig. 0584T
By: Perko

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Overview
Inlet Check Valves (ICVs) are used to help prevent wellback and spitback. They comply with the CARB and EPA standards and meet the requirements of USCG Safety Standards.
Wellback occurs when fuel in the tank expands during the heat of the day, and moves up into the fuel fill hose, possibly overflowing into the water.
Wellback does not occur during fueling.

These spring-loaded valves are installed in the top of the fuel tank, and are normally closed — thus preventing fuel from moving up the fuel fill hose.
During fueling, the weight of the gasoline opens the valve, so fuel can enter the tank.
All Perko inlet check valves are designed to handle incoming fuel flows in excess of 18 gallons per minute.

Mounting options for ICVs include flanged (for plastic tanks), threaded or welded (for metal tanks), and swivel (for metal tanks). See Related Products.
Threaded valves mount into a 1-1/2" NPTF dry seal aluminum threaded receiver welded onto the tank. (Receivers are sold separately; not supplied by Fisheries Supply.)
Custom ICVs are also available for specialized applications.
There is a version of fuel inlet check valve which can be inserted into the bottom of the fuel fill hose, allowing for use of a standard fuel tank inlet fitting; see Related Products.


Heavy on the technical side...
Maximum fuel leakage is 0.5 cc/min @ 12.5 kPa and 149 kPa

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