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Posted by Stateng on March 17, 2002 at 16:35:06:
In Reply to: frequent blowing of steam condensate from boiler safety valve drip line posted by zee on March 16, 2002 at 08:24:12:
: there is always fitted a drip line with pressure safty valves so that the condensate formed by the steam could not build up a static hydraulic head on valve disk. my question is that the drip line of valve is blowing condensate with pressure frequently(one time in about 20 minutes). WHAT IS WRONG WITH SAFETY VALVE.
: THANKS .
You obviously have a weepier. This is a very common problem especially when the set point of the SV (safety valve) is very close to the operating pressure of the boiler or with long intervals between test lifts. That is operating pressure 75-90% of SV set. It is a good plan to look after your SV, replace weeping SV, hand lift with a quick short snap monthly or more often. If you only hand test once a year, you may have problems with a stuck SV or leaking SV.