Boiler Feed Pump and a Worn Out Seal Face
Boiler Feed Pump and a Worn Out Seal Face
(OP)
Hello Group
I have got a cartridge seal from a boiler feed application.
356°F (180°C) at 246 Psi (17 BarG) with a cooled chamber and the seal also has a cooled seat.
What I have is an Antimony impregnated Carbon versus a Sintered Silcon Carbide equiped mechanical seal.
The Carbon face has worn a heavy groove into the Silicon face and then off course leaked with some flashing off which has pitted the carbon face slightly.
The carbon 'nose' height remains visually as new.
I think some 'solids' or 'fine' have embedded in the softer carbon and ground away the Silicon. Agree or disagree?
I'm having a head scratch as to what the solids are and where they originate.
Am I right in thinking Boiler Feed apps often have a Magnetic Particle Filter to remove these 'fines'??
One point I think may be relevant is the pump and boiler are new and the pump has an iron impeller.
The water is softened
A water analysis is to be arranged.
I dont know the pH Im afraid
Any advice welcomed
Thanks
M
I have got a cartridge seal from a boiler feed application.
356°F (180°C) at 246 Psi (17 BarG) with a cooled chamber and the seal also has a cooled seat.
What I have is an Antimony impregnated Carbon versus a Sintered Silcon Carbide equiped mechanical seal.
The Carbon face has worn a heavy groove into the Silicon face and then off course leaked with some flashing off which has pitted the carbon face slightly.
The carbon 'nose' height remains visually as new.
I think some 'solids' or 'fine' have embedded in the softer carbon and ground away the Silicon. Agree or disagree?
I'm having a head scratch as to what the solids are and where they originate.
Am I right in thinking Boiler Feed apps often have a Magnetic Particle Filter to remove these 'fines'??
One point I think may be relevant is the pump and boiler are new and the pump has an iron impeller.
The water is softened
A water analysis is to be arranged.
I dont know the pH Im afraid
Any advice welcomed
Thanks
M
-
Milkboy





RE: Boiler Feed Pump and a Worn Out Seal Face
RE: Boiler Feed Pump and a Worn Out Seal Face
There are lots of gremlins with a new installation until it all finally gets cleaned out.
rmw
RE: Boiler Feed Pump and a Worn Out Seal Face
With a new installation, you are likely to have some debris remaining in the pipework for sometime. Consider fitting a temporary cyclone separator in the feed pump discharge to catch those fines.
RE: Boiler Feed Pump and a Worn Out Seal Face
Johnny Pellin
RE: Boiler Feed Pump and a Worn Out Seal Face
I have seen an applicaton where the soft Carbon face ground into a SiC. It was in refrigerant, a very poor lubricator not completely unlike BFW. The best theory we had for that kind of wear was that some of the SiC became embedded in the Carbon turning the primary ring into a grinding wheel. I had to save those faces for show and tell training sesions. Nothing like seeing the exact fit that the face ground for itself to drive how bad a lack of lubricaton is. I mean exact fit as if they were made that way on purpose.
What exactly did you mean by cooled chamber and cooled seat?