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The QC series check valve is also known as an upstream, non-return, backpressure, or one-way valve; it is installed in support of automatic shutdown valves and safety devices. The main purpose is to prevent and protect the backflow medium against the consequences of unintended reverse flow.
| Rating | Class 150 to 1500 JIS 10K to 63K |
|---|---|
| Size | 1/2” to 1-1/2” |
| Temperature | 550°C, 1022°F |
| Leakage Rate | API 598 |
| Design Code | API594 |
The QC series lift check valve has a good reputation with its stable seat performance and the extended long life owing to its long-range structure and self-arrangement disc. This design makes it more durable and safer to operate at a job site.
The QC series lift check valve requires only a relatively short lift to obtain full valve opening. This also prevents the disc from chattering and reduces vibration and noise during operation.
The backpressure hole on the disc provides a conclusive pressure seal force between the disc and seat.
If the valve needs to open and close at the required operating pressure, a specially designed spring can be incorporated to the back of the disc as well. This spring option provides reliable valve performance under the desired conditions.
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that best meet our customer’s needs.
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