Activists 4 Packs 3-8 Inch 10 mm Fuel Non Return One Way Check Valve Aluminium Alloy Non-return Check Valve for Petrol Diesel Oil Fuel

4 Packs 3/8 Inch 10 mm Non Return One Way Fuel Check Valve from Activists Size: 3/8 Inch, 10 mm Material: Aluminum Alloy Working pressure: 2.9-87 psi (0.2-6bar) Operating temperature: -30 ? - 130 ? What is the pressure rating? The minimum upstream pressure required to operate the aluminum one-way check valve is 2.9psi (0.2 bar). Working pressure:2.9-87 psi (0.2-6bar) Operating temperature: -30 ? - 130 ? Should this be installed before or after a mechanical fuel pump in a carbureted application? It usually installs close to the gas tank but you can put it closer to the fuel pump if you want. In any event it goes before the fuel pump as your trying to stop flow back. Would this valve be effective in a air/vapor system? …. One-way Check valve installs in many diesel / bio fuel systems / Carburetors and low pressure fuel systems where you desire fuel to only flow one way. Suitable for water, petrol, diesel, oil, and other fluids. Note:This fuel non return one way check valve cannot be used in methyl alcohol because formic acid will be produced while it is powered on, which will lead to the uselessness. Package includes: 4 x 3/8 Inch 10 mm mm non return one way check valve