Check valves are normally installed horizontally but swing check, lift check and dual plate check valves can all be installed vertically in exceptional cases. The latter application should be mounted with the flow going upwards and with very good control of the head in the system. Our check valves are available in a number of different materials and options, with threaded connections, with flanges or wafer type which are clamped between flanges. The differnt types of check valves included in our range are: Swing check valves Swing check valves are the most common type of check valves. The flow through a swing check valve is in a straight line resulting in minimal pressure drop. Lift check valves Lift check valves are generally installed in a horizontal flow, but may be installed in vertical lines with a spring assisting the disc. Dual plate check valves Dual plate check valves are a wafer type of valve with short face to face measurement, for installation between DIN, ANSI or JIS flanges. The dual plate check valve with its resilient lining is excellent for use in sea water cooling systems, ballast systems or fresh water systems. Inner stainless steel parts in monel and inconel gives our dual plate check valves high resistance to corrosion. Foot valves A foot valve is a check valve equipped with a strainer and mounted in the end of a pipe, to prevent suction of debris and particles from the tank into the pump. Must be installed vertically.