This Pressure Regulator is made of NSF approved Acetal with port sizes of 1/4″ (R25) and 3/8” (R45). Both have 1/4″ gauge port threads. The maximum supply pressure is 125 psi and the temperature range is 40˚ F to 125˚ F. The spring pressure ranges are 0-25 psi, 0-60 psi and 0-125 psi. This Regulator is recommended for compressed air. The 1/4″ regulator is relieving and the 3/8” is non-relieving.
