Castel and Danfoss-Secop. Articles of these two manufacturers can be found in our online shop category refrigeration cycle valves check valves. These manufacturers have been known for many years to produce excellent quality check valves. Further information on the article can be obtained by clicking on the corresponding product image. For information about the manufacturer, click on the desired manufacturer logo. ##ausblenden## With us you can order check valves from the market leading manufacturers in the field of refrigeration components at a fair price. Many of the check valves are in our stock and can be delivered as fast as possible.