The Camco* type A-3 Series Velocity Safety Valve is designed to prevent wells from overproducing or blowing out in the event of an emergency. The A-3 is differential pressure-operated and set to close at a predetermined rate of flow. The A-3 can be adjusted to close at different flow rates by changing the spring, using spring spacers, and/or varying the inside diameter of the valve’s replaceable flow tube choke bean†. The A-3 Series Velocity Safety Valve is designed to operate in a “normally open” position during normal well flow, has an unlimited setting depth and, are suitable for corrosive environments. The valves are available with working pressure ratings to 10,000 psi[68,900 kPa].
The A-3 is available in a variety of materials. They feature the field-proven Camco* type flapper-closure system. This premium flapper has full, metal-to-metal sealing plus a secondary soft seat, and meets leakage acceptance criteria of API 14A.