AVK Valves and Fittings for Renewable Gas
Valve and Fitting Solutions from Digester to Grid and CHP
As part of the AVK group we have the advantage to access products that suit all types of renewable gas applications.
For example, AVK UK are able to offer a complete solution for all sections of a Bio Gas Plant regardless of Feedstock type, Slurry or Bio Waste and whether the process includes Siloxane (synthetic silicone derivatives) removal. We can also provide a solution for gas that is used locally or converted into Biomethane and fed back into the grid.
Using the knowledge and local expertise of Donkin you have access to the substantial range of products from :-
• Donkin Valves in Chesterfield - manufacturer of ball, gate and parallel slide gas valves.
• AVK Syddal in Hyde Manchester - manufacturer of a complete range of fittings.
• Aqua Gas Manufacturing in Corby - water valves and swing check valves.
• Wouter Witzel in the Netherlands - manufacturing vulcanised butterfly valves.
• Interapp in Switzerland - manufacturing loose liner butterfly valves.
• Cyl and Orbinox in Spain - manufacturing knife gate valves.
• Tec Artec in Germany - manufacture high pressure ball and plug valves.
• Syntec / AVK Plastics in China - manufacturing the PE ball and butterfly range.
It is important when choosing valves and fittings for use on a biogas plant that the correct products are chosen for each particular section of the process. Overall in the connecting pipeline assemblies you could have a requirement for knife gate, wedge gate, resilient seated, butterfly, ball and non-return valves depending on the process. To select the correct valve for the application the following general points should be taken into consideration:
• Carbon steel should not be used on biogas due to the H²S, content. It is recommended for these applications that stainless steel be used for valve internals and the valve bodies be either cast/ductile iron or stainless steel.
• Consider the level of H²S when choosing valve sealing materials. Viton is recommended over nitrile if the H²S content is above 200 ppm.
• Consider the pressure drop through the valve. Use clear bore wherever possible. Consider that butterfly valves have line restriction.
• Knife gates are recommended if the feedstock is more than 10% solids.
AVK manufacture a vast range of products suitable for the various types of renewable gas :-
