Threaded seat rings in valves in services with high velocity (turbulent) flow or thermal cycling should be lock welded to the body to avoid loosening. Please specify.

• 当用于高速流体(湍流)或热循环应用时，为了避免松开，内螺纹阀座环应该锁焊在壳体上。请在订购时加以指定说明。