The website requires your browser to enable cookies in order to login.
Please enable cookies and reload this page.
Designed to protect fired and unfired hot water pressure vessels against overpressure conditions. The diaphragm's oversized effective area generates a greater operating force which helps to overcome the effects of fouling. Valves feature a unique fail-safe disc with sufficient area to permit the valves to maintain their safety relief function in the event of a diaphragm rupture.