The high quality engineering on these Superflow regulators provides for stable regulation over the life of a cylinder, reducing gas consumption, promoting safety and increasing the efficiency of application. Superflow regulators are approved to BS EN ISO 2503 at 300 bar. Features Include: Anti-tamper safety valve Pressure gauges to ISO 5171 for safety and accuracy Bonnet clearly marked with third party approval mark Sintered bronze inlet filter to protect internal parts Precision machined, hot forged brass body and bonnet for strength Reinforced diaphragm provides long service life and sensitive pressure control Optically ground main valve seat allows for safe, prolonged service life in demanding applications.