A diffuser is a plate with a large number of small holes in it that is installed in the downstream pipework. On gas and vapour applications it creates a back pressure between the VALVE and plate, and this enables a smaller value to be selected than WOULD otherwise be possible, due to the lower velocity at maximum flow. The overall noise level PRODUCED will be lower as the overall number of pressure drop stages are increased.

A choke is a restriction orifice and is a plate with one central hole. It is used with liquid flows and is also installed in the downstream PIPE work to CREATE backpressure. The purpose is to reduce the pressure drop across the valve at the maximum flow rate either to eliminate cavitation or to reduce the intensity of the damage to the valve.

A diffuser is a plate with a large number of small holes in it that is installed in the downstream pipework. On gas and vapour applications it creates a back pressure between the valve and plate, and this enables a smaller value to be selected than would otherwise be possible, due to the lower velocity at maximum flow. The overall noise level produced will be lower as the overall number of pressure drop stages are increased.

A choke is a restriction orifice and is a plate with one central hole. It is used with liquid flows and is also installed in the downstream pipe work to create backpressure. The purpose is to reduce the pressure drop across the valve at the maximum flow rate either to eliminate cavitation or to reduce the intensity of the damage to the valve.