What is the difference between the conventional SY series and the new SY series?Last Updated: July 20, 2018
The valve part numbers for the conventional SY series are SY∗∗20, SY∗∗40. The new SY delivers more air flow than conventional design. New SY is plug-in type.
The valve part numbers can be SY∗∗00, SY∗∗01 or SY∗∗31. The old valve types are still available for sale.