Valves and flow equipment for engineered wood manufacturing

Engineered wood plants operate with steam, condensate, thermal oil, hot water, cooling water, compressed air, resin, additive, chemical solution and auxiliary fluid networks. Valve selection is based on pressure, temperature, fluid type, viscosity, operating frequency and the conditions at the installation point.

MDF, OSB, particleboard, fibreboard, plywood and laminated wood production lines require controlled flow and temperature in dryers, hot presses, heat exchangers, resin tanks, spraying systems, pumping stations and auxiliary circuits. Correct sizing helps limit pressure losses, temperature fluctuations and unstable operation in heating, cooling and dosing lines.

Typical applications

• Steam networks for heating, drying, cleaning and auxiliary thermal processes.
• Thermal oil circuits on hot presses, dryers, heat exchangers and heating systems.
• Condensate and drainage lines from headers, heat exchangers and steam pipework.
• Resin, adhesive, additive and chemical solution lines for mixing and spraying.
• Hot water, chilled water and cooling water circuits for auxiliary processes.
• Compressed air networks for pneumatic actuators, instruments and spraying systems.
• Water treatment, recirculation, cleaning and wastewater systems.
• Auxiliary circuits on silos, mixers, presses, dryers, tanks and cutting units.

Equipment selection criteria

• Operating pressure, design pressure and valve differential pressure.
• Operating temperature and thermal variations during start-up or shutdown.
• Material compatibility with steam, condensate, thermal oil, water, resin or chemical additive.
• Viscosity, risk of solidification, deposit formation or suspended solids.
• Resistance to wood dust, humidity, thermal radiation and external corrosion.
• Required flow rate and allowable pressure drop.
• Isolation, control, non-return, relief or overpressure protection function.
• Seat, stem and connection tightness requirements.
• Operating frequency and need for connection to PLC, DCS or local automation system.
• Access for inspection, cleaning, maintenance and replacement of internal parts.

Indicative equipment

• Isolation valves for steam, water, thermal oil, air, resins and auxiliary fluids.
• Control valves for flow, pressure, temperature or level regulation.
• Pressure reducing valves and pressure regulators for steam and compressed air networks.
• Check valves for pump protection and backflow prevention.
• Safety and relief valves for boilers, vessels, headers, heat exchangers and pipework.
• Steam traps and condensate management equipment in steam lines.
• Line strainers for protection of control valves, pumps, nozzles and instruments.
• Separators, air vents and drainage equipment for steam and water networks.
• Pneumatic and electric actuators for remote or automatic operation.

For each application, the line operating data, fluid, flow rate, pressure, temperature, viscosity, presence of dust or deposits, cleaning conditions and control system requirements should be reviewed. These data define the valve type, nominal size, pressure class, construction materials, sealing arrangement and suitable actuation method.