TPi March 2019

Products & developments

Three-body valve designed for hygienic processes

valve. Its modular design also makes it easy to apply the double seat valve whenever a process needs change, while ensuring efficient, hygienic and continuous production. The full benefit of using Alfa Laval Unique Mixproof valves is gained by combining them with Alfa Laval ThinkTop and ThinkTop Basic valve sensing and control units. Alfa Laval provides specialised products and engineering solutions based on its key technologies of heat transfer, separation and fluid handling. Its solutions help customers to heat, cool, separate and transport products in industries that produce food and beverages, chemicals and petrochemicals, pharmaceuticals, starch, sugar and ethanol. Its products are also used in power plants, aboard ships, oil and gas exploration, in the mechanical engineering industry, in the mining industry and for wastewater treatment, as well as for comfort

The Alfa Laval Unique Mixproof three-body valve provides reliable fluid handling and safety, making it suitable for use as a changeover valve for hygienic industries such as food, dairy, beverage and home-personal care. Two or more valves of other types can be replaced with a single Unique Mixproof three-body valve. Two independent plugs and the fully balanced design enable two different fluids to pass through the same valve without risk of cross-contamination, even in the event of pressure shock. Ensuring safe and hygienic operation, the double- seat design avoids cross-contamination while the double lip seals provide added protection, for spillage-free operation. Maintenance and cleaning are quick and easy due to a top-loaded design, no adjustable components, maintenance-friendly actuator and built-in leakage detection on all seals. The valve is always equipped with seat lift and seat push function, meeting stringent hygiene standards. Hygienic processes can be optimised by custom- ising the Alfa Laval Unique Mixproof three-body

climate and refrigeration applications. Alfa Laval Kolding A/S – Denmark alfa.laval@alfalaval.com www.alfalaval.com

Alfa Laval’s Unique Mixproof three- body valve

Externally monitored pneumatic safety exhaust valve for emergency stop and fault conditions

very high flow rates, high faulted flow rates, compact design and high mean time to failure (MTTF) values. Connectivity is via two M12 connectors that provide solenoid and pressure sensor interfacing. Compatibility with devices from manufacturers such as Rockwell, Omron, Sick and Siemens adds to the versatility of the valves. Being externally monitored gives greater control at the safety device for the customer’s application. It also reduces the complexity of the machine for start- up or resetting of the valve. The fail-safe design of the P33 family is maintenance- free and requires no additional silencers or mufflers that can clog and create potentially unsafe exhaust conditions.

Parker Hannifin has introduced a new safety exhaust valve that rapidly exhausts compressed air in the event of a fault condition or when a machine has an emergency stop. The P33 is designed for two-channel control architectures and is externally monitored. The safety valve has a patented fail-safe design and is suitable for use in applications up to category 4, performance level e. The P33 safety exhaust valve is available with adjustable soft-start and high- flow exhaust performance to ensure rapid exhaust of compressed air when required. Designing a control system with a high diagnostic coverage allows fault detection within the valve, while LEDs provide operators with a clear status indication of sensor power, main solenoid operation and fault condition. The design of the valves has been optimised for long service life (B10d),

The versatile P33 safety valve is easy to use and provides a responsive safety solution

Parker Hannifin – UK parker.uk@parker.com www.parker.com

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March 2019 TUBE PRODUCTS INTERNATIONAL