Pneumatic Control In A Hygienic Process Environment

Standardized hygienic design control cabinet solutions from Bürkert take into account the requirements in the food and beverage industry. By using suitable materials that can withstand the harsh conditions and high standards in a hygienic environment, these systems can be installed in the immediate vicinity of the actuators and sensors. This can save many meters of supply lines and installation effort. The system solutions for pneumatics are based on the Bürkert valve terminal types 8640 and 8644 AirLINE Quick, which are installed in hygienic design housings. Bürkert uses the switch cabinet housing in three widths, each with the same height and depth, depending on the space required for the required components. This limitation brings the advantage of inexpensive standardization and short-term availability,but thanks to the coordinated modular concepts from Bürkert offers enough flexibility for individual solutions.

Standardized and hygienic

However, the resulting advantages for the user are even more important: The effort involved in process automation is minimized, the technology is coordinated and developed by Bürkert with the aim of maximum process reliability and system availability. The system is ready for connection, tested and delivered with all necessary certificates and approvals.

The configuration options can be selected depending on the requirements:

• Cupboard grid dimensions
• Three different external dimensions
• Optional maintenance unit with or without filter unit
• Flexible valve terminal assembly inside the control cabinet
• Flexible communication (Profibus, Ethernet, etc.)
• Optional additional power supply

Intelligent pneumatics

Intelligent automation can save money by reducing consumption and operating losses. The longer hose and cable sections become in pneumatic applications, the more expensive and error-prone they become. The line length has a concrete impact on the loss of air capacity in transport routes and the higher air volumes in the line system. One solution is to integrate the pneumatic control elements as far as possible and to bring them to the process in a decentralized manner. Bürkert offers options and mixed automation concepts to adapt the installation to the needs.

On-site automation

The type 8614 automation system in the on-site control cabinet according to IP65 combines the advantages of central and decentralized automation. The modular Air-Line-Quick valve terminals of the types 8640 or 8644 used in the control cabinet are compact and can take over the pneumatic control of the process valves as well as the feedback of a system. When the automation systems are completed with an I / O system, process cycles including throughput, temperature and level can be measured, checked and controlled. Pilot valves can be replaced, which is possible with the optional P shut-off during operation. Process safety functions such as check valves in channel R + S prevent neighboring valves from being lifted.Undefined switching states or mixed media should thus be excluded as far as possible. The structure with different pneumatic modules enables up to 24 3/2-way valve functions to be implemented on one valve terminal. The electrical connection technology can be implemented via fieldbus interfaces, collective connections or multi-pin interfaces.

Valve lens

Bürkert and Siemens combine their know-how

Hygienic process automation

With the Air-Line-Quick adapter plate made of stainless steel, the valve terminal is mounted on the control cabinet floor or the control cabinet wall. Bürkert uses chemically resistant sealing materials. The Air-Line-Quick valve terminals are prewired, just like all other components in the control cabinet. The installation takes place in close proximity to the valves in the process environment. A housing with a 30 ° roof pitch, internal hinges, a gap-free silicone seal and hygienic locking inserts contain the equipment that is easy to clean. The hygienic design housings with protection class IP 65 are available in three different widths.

Safety shutdown

The valve terminals type 8640 and 8644 are available with safety shutdown (type 6524 and 6525). Via a molded cable, the affected valve should be able to be switched off electrically via a potential-free contact, although they are controlled via the valve terminal. All other processes continue without loss of time or product. With these valves, processes up to performance level C can be safely switched off in accordance with the machine directive EN ISO 13849. Performance level D can also be achieved by integrating the redundancy block (type MKRS). (br)