Steam leakage as a result of steam trap multifunctioning is a serious energy loss and must be stopped immediately. Many factors are affective on the amount of the leakage Difference between inlet and outlet pressures, valve position, steam trap type and orifice diameter are affective on this amount. In order to help the steam trap users, steam amount which goes through an orifice discharges to the atmosphere is calculated in below example. An orifice differencial pressures are selected according to all steam trap types.

The values are given in the table are theorical values, to be able to accept this values directly as energy loss, condensate must be discharged to the atmosphere. Returning condensate to the condensate tank is not complete energy loss of loss steam. Leaked steam goes to condensate tank and heat up the condensate before the feed to the boiler, this may even provide a positive effect. In such cases, taking half of the given values is a better option.