289H安全阀是一种节流式安全阀在压力调节器下游使用，以保护下游系统不会受到过压影响。运行平稳节流作用可最大限度地减少压力波动紧急操作时的系统。

The 289 Series relief valve is a throttling relief valve used downstream of pressure regulators to protect thedownstream system from overpressure. A smooth throttling action minimizes pressure surges in the system during emergency operation.