When do you use a cycle switch -vs- proximity switches in a Series Progressive System?
Economics, cycle rate of the divider valve, expected switch life, system pressure and the size of the pistons in the divider valve stack are all considerations. The use of cycle indicator activated switch requires the use of an indicating pin integral with one of the valve sections dispensing piston. Piston physical size limitations prevent the use of an indicating pin in the smaller valve sections. Therefore, Series-Progressive assemblies with small valve sections would not be candidates for the more economical cycle pin/mechanical switch type of cycle indicator. High cycle rate (above 60 CPM) and continuous operating systems are also poor candidates for cycle switch use, due to switch and indicator seal life limitations. Proximity switches are not limited to any size of valve section and also do not require the use of special valve sections equipped with indicator pins they are simply and easily inserted in place of the piston enclosure plug on any side of any size valve section. The
