Choke rings, chokes and reducers in silicon carbide for lines that carry solids at speed.
Where the bore narrows, the flow speeds up and the wear follows.
Chokes and reducers cast in silicon carbide for those few inches.
At a choke or reducer the flow speeds up and erosion rises with it, so the material that resists best there is a dense silicon carbide such as reaction bonded InVinCer RB, alumina bonded ALTRON or nitride bonded NITRON, cast in one piece with a smooth transition. Blasch makes in-line chokes, choke rings and concentric and eccentric reducers in these grades, as ceramic parts or lined into steel bodies with the ends of your line. They run in power plant piping, slurry lines and titanium dioxide plants.
A choke is a deliberate restriction in a pipe. It sets the flow, creates a pressure drop, or evens out the flow between parallel lines, for example the pipes that feed a row of burners.
A reducer joins two pipe sizes. Concentric reducers keep the centerline, eccentric reducers keep one side of the pipe flat, which matters in slurry lines where solids would otherwise collect at the step.
In both parts the cross section shrinks and the velocity climbs. Solids that slide harmlessly along a straight pipe start to cut at the transition, and a steel choke loses the bore it was sized for.
The velocity is highest where the pipe is narrowest, so the smallest part in the line often decides how long the whole line lasts.
Each part is cast for one line, with a bore and transition designed from your flow data.
Chokes with a ceramic bore sized for the flow you need, cast so the bore keeps its diameter as long as possible.
Ceramic rings that narrow the bore at one point of a lined line, built into a spool or fitting.
Lined reducers that connect two pipe sizes without a step in the ceramic bore.
The grades are InVinCer RB (reaction bonded silicon carbide), ALTRON (alumina bonded) and NITRON (nitride bonded), with oxide bonded silicon carbide and tungsten carbide for special duties. Reaction bonded silicon carbide
Because the Blasch process casts close to final shape, the transition from the large to the small bore is part of the casting, not a joint between two pieces. Ends can be flanged, grooved, welded or threaded to match the line.
Chokes and reducers are part of the CeraLine lined pipe system, together with lined elbows and spools. The valves that sit next to them are covered on ceramic valve components, and the whole range on wear products.
They are used in mining, power generation, cement and heavy industrial processing. Ceramics for power generation
No. These are piping parts. Electrical line chokes are inductors for motor drives and have nothing to do with ceramic wear parts.
From your flow data, or from the bore of the choke in service today. The engineer can keep the existing size or change it if the line needs it.
Yes. The steel body carries the end connection of the adjoining pipe, so a lined section can start or end at the reducer.
Send the line size, the bore you need and what flows through it. A Blasch engineer designs the choke or reducer for that spot.
