Review the existing pneumatic system

Record the air supply, valve sizes, control signals, actual flow requirements and maintenance history. Air leaks, moisture and instrument-air supply conditions can affect pneumatic equipment. The scope of a replacement depends on the existing line and does not imply that the whole plant air system can be removed.

Regulation and switching have different duties

An ASV servo control valve regulates water flow by changing valve position. An HSP1000 servo on/off valve controls switching. Their travel times, diameters and control functions differ, so compare the selected models with the duty of each circuit. Valve position accuracy is not the same as water-flow or temperature accuracy.

Opening, closing and water hammer

Abrupt changes in water velocity can produce pressure surges. The HSP1000 allows opening and closing speeds to be set independently. A controlled closing profile can help reduce water hammer, subject to the pipework, flow and operating conditions. Fast full-stroke figures apply at the specified maximum speed and do not describe a slower closing setting.

Interfaces and commissioning

Confirm the PLC interface, feedback, electrical supply, enclosure locations and cable routes for the proposed equipment. BOYE documentation describes local control, position feedback and diagnostic functions. Available interfaces and functions should be verified against the chosen model and project specification.

Prepare the installation

Check pipe sizes, flange connections, water pressure, installation space, maintenance access and shutdown windows. Agree the required response to power loss or communication faults. Commissioning should check commands, actual valve movement and process behaviour under representative conditions.