INLINE CHECK VALVES Trausch Dynamics In Line Brass Check Valve 1" Female NPT x 1" Female NPT housedocer When should you use inline check valves? Fluid Power World Male To Female Ball Valve Vertical Inline Check Valves Compressor Components. Vibrant Performance check valves are lightweight and constructed entirely from 6061 aluminum alloy. Vibrant Performance check valves are designed to prevent flow back of all varieties of fuel, oil or coolant and will stand up to the most rigorous operating environments. and are capable of handling temperatures ranging from 30deg F to 400deg F and operating pressures up to 300psi. All Vibrant Performance check valves are available in anodized black only