RCB Series RCB Operating Pressure: 20-250 psi Operating Temperature Range: -15° to 400°F Inlet Connection Type: Male or Female NPT/BSPT Inlet Connection Size: 1/4″ and 3/8″ (-4 and -6) Outlet Connection Type: Female NPT/BSPT Outlet Connection Size: 1/8″ (-2) Technical Data Sheet