Kaval check valves are automatically actuated and rely on flow velocity to open and remain in the open position, while gravity or backpressure ensures closure.

Sealing performance depends on backpressure. If flow velocity is too low to fully open the valve, the internal components may oscillate, leading to noise, vibration, or premature wear.

To ensure stable operation and extended service life, check valves should be properly sized based on flow conditions.

These valves are designed to prevent reverse flow in both horizontal and vertical pipelines. In vertical or inclined installations, they are suitable for upward flow only.