Please bear with me - this is not my field....
Last year we had an electronically controlled proportional valve fail (on an injection moulding machine) - replacement cost 1700GBP. The mechanical part of the valve is fine.
Yesterday the engineer from the company gave me a service fix sheet which involved changing a failed electrolytic capacitor (0.2 GBP I guess!).
The question is, is there a "better" type of capacitor one can use? (e.g. more reliable!!) The current one is 47mfd, 50V, aluminium can type, both wires out of one end.