Non-Return Valves

Hygienic Non-Return Valve
Non-Return Valve DIN
Non-Return Valve DIN
AWH Non-Return Valve

AWH non-return valves are designed for use in pipelines, systems and machines in the food and drinks industry. They are suitable for liquid products, additives and cleaning liquids. They prevent pipelines running empty and are ideally installed on the pressure side of pumps to prevent the liquid level dropping or higher system components running empty when the pump is switched off. Mixing and metering systems, which combine different media, are another application.

A non-return valve is fitted in every component supply line to prevent penetration of the other component. AWH non-return valves are characterised by a hygienic, flow-optimised design which facilitates low pressure losses and optimal self-cleaning. The non-return is divided into an upper and lower section and reliably secured with a clamp connection. The housing parts are sealed with a U-shaped sealing ring, which joins the housing sections hygienically and absolutely flush with one another. The valve is configured in accordance with the latest hygiene criteria and equipped with metal stop surfaces to protect the seals. This reliably avoids micro-gaps where germs and product residue can gather. The double guide of the valve plate ensures long-lasting and reliable operation.

 

Applications

  • for use in pipelines, systems and machines
  • suitable for liquid products, additives and cleaning liquids
  • prevents pipelines and system parts running empty

Technical Data
Material

Housing: 1.4301 (304) / 1.307 (304L) / 1.4404 (316L)
Valve plate: 1.4301 (304) / 1.307 (304L) / 1.4404 (316L) / 1.4408 (316L)
Spring leadership: 1.4404 (316L)
Spring: 1.4310 (301) / 1.4571 (316Ti)
Seal: EPDM, FKM

Operating pressuremax. 10 bar / 145 psi
Opening pressure0,05 bar / 0,7 psi (others on request)
Operating temperaturemax. 80°C / 176°F

 

 

Hygienic Non-Return Valve in intermediate Flange Design


The main task of such a valve is to reliably prevent fluid backflow. The hygienic AWH non-return valve was developed especially for processes with increased product and process requirements. The AWH valve is designed to have optimal flow and minimal dead space. It therefore has excellent properties in terms of cleaning and hygienic operational reliability. The valve plate in the interior has neither a groove nor a gasket. A seal is created by an O-ring mounted in the housing, which meets the highest hygienic requirements. There is no mechanical stop inside the housing in order to permanently ensure the best possible position of the plate to the gasket. All O-rings installed in the housing essentially comply with the requirements of the hygiene standard DIN 11864 for flange connections. The valve thus offers the greatest possible protection against contamination and germs in the area of the gaskets. Two gasket qualities, EPDM and FKM, are available for use.

 

 

Technical Data
Material

Housing: 1.4404 (316L)
Valve plate: 1.4404 (316L)
Spring: 1.4571 (316Ti)
Seal: EPDM, FKM

Operating pressuremax. 10 bar / 145 psi
Opening pressure0,05 bar / 0,7 psi
Operating temperaturemax. 80°C / 176°F