Picture group flash steam hammer on wet-dry return

dlampe

mend of dry return and one-way check valve

Condensate is flashing over at this point and check valve is being slammed shut by the force rapid fire like emptying the clip on an AR-15 tap,tap,………tap.

dry return to wet return transition

near boiler piping and controls working as atmospheric boiler 2.5 lbs pressure below 2.5 lbs pressuretroll doesn’t turn on house gets cold.

series 63 peerless

near boiler piping and king valves

End of main steam trap is for air venting to dry return.

Jamie Hall

What pressure is that system running at? Most systems — not all — which have crossover traps were also vapour systems — very low pressure — and I'm wondering if your water hammer problem on that short horizontal pipe in the condensate drip which you show may be such that steam pressure in the mains is backing water up into it, since the dry return for which it is a drip will be at atmospheric, or should be.

It may even be high enough that steam is pushing through your "wet" return from the steam main drip right next to it, condensing, and causing the problem.

Check your cutout pressure — it probably should be less than 8 OUNCES per square inch, and certainly less than 1 POUND.

mattmia2

unless there is a vacuum pump i doubt that the condensate is flashing to steam after it has had a fair bit of piping to cool it down. Much more likely there is steam in the returns and the water is encountering that.

If it is a vapor system and the boiler is oversized or some radiators are closed that pressuretorl won't adequately control the pressure.

EdTheHeaterMan

Picture group flash steam hammer on wet-dry return

So you have a picture that you needed to use a Flash camera to take a group shot of all your friends holding hammers, near your steam boiler? You can try a faster film like Kodak Tri-X 400. It is a black and white film but it has an ASA number of 400. That means you may not need a flash on your camera in low light conditions.

Hope this helps, and hope I didn't misunderstand anything