Ring valve


Category: Quarter-turn valves
Product line: Coker ball valves

  • Size range(s)
    NPS 14 – 36 (DN 50 – 200)
    Pressure rating
    ASME Classes 150 – 300
    Standard connections

Features and benefits

Patented Velan ring valve​ for backpressure control

Ring valves are intrinsically safe design. The ring valve has no seats. It is a throttling valve. As a result, it does not require a mechanical stop in order to avoid full closure and the resulting drum overpressurization.
  • Steam purges: Steam purges to bellows and body area ensure the valve cavities are kept free of coke buildup.
  • Excellent throttling characteristics: In the “maximum obstruction” position, the valve provides a pressure drop equal to a butterfly valve’s set at 15° open.
The electric, hydraulic or pneumatic actuator is selected in function of coker service. A large torque safety factor ensures the valve will cycle under the most stringent conditions. When selecting actuators, special attention is paid to the coker deck environment. 

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© Velan Inc. All rights reserved.
IgnitionWeb High-Touch Communications