Attended a course on steam boilers that did not really cover much more that we knew already.
The sight glass proving method as altered though. For those not in the know, sight glasses are situated on the side of the boiler and tell you how much water is in the boiler. Too little and the boiler can be potentially a bomb just getting ready to explode.
There are three handles or taps on the sight glasses which should all be facing downhill, this gives a quick visual indication that they are set correctly for normal operation. The top is the steam valve, middle is the water valve, and finally the bottom is the drain valve.
New gauge glass procedure is now
steam valve - closed- horizontal
water valve - closed- horizontal
drain valve - open - horizontal
gauge should empty and after initial blast should stop indicating that steam and water valves are holding
Opening and then closing the steam valve will wash the steam line and you shoulkd see shimmers as steam passes through.
Opening and closing the water valve will wash the water line and you should the level rise in the sight/gauge glass.
Close the drain cock, slowly open the water cock, sight glass should fill up, slowly open the steam cock and the water level should slowly drop to match the actual boiler level.
Have a look at the Spirax Sarco website for more on steam boilers
Subscribe to:
Post Comments (Atom)
0 comments:
Post a Comment