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I have been searching for a source of orifices in standard pipe sizes. I have looked in Thomas Register, etc., but haven't found anyone who manufactures a simple, inexpensive orifice like I need.
So far, I have been manufacturing them myself.
These are simple 1" NPT pipe nipples 4" long. I cut them in half, and then weld them back together with a metal disk inserted between the two halves.
The disk has a .07" pilot hole in it, which I use for the lowest flow. I then bore it out to the proper diameter for higher flows.
On both sides (and adjacent to) of the disk, I drill a hole for a 1/8" SS tube about 3" long, which is welded in.
The two holes are offset by about 20 degrees, so I can put tubing fittings on them without them hitting each other, because they are right next to the disk, and separated only by the thickness of the disk.
This gives me a nice orifice which I can pipe into an airline and measure the differential flow across the orifice.
The material must be stainless steel, though brass would also be acceptable.
It is used only for air at relatively low pressures (about 7-10PSI drop across the orifice, maximum, at a pressure of up to 100 PSI in some applications, though most are about 10"w.c.).
I can email a sketch or drawing to anyone who can supply these at a reasonable cost. Current annual usage is relatively low volume...maybe 50 or so.
Does anyone know where such an orifice can be commercially purchased? I can provide further specs, as required.
Thanks in advance.
Bruce Axtell
Engineered Control Systems, Inc.
763-421-8787
763-712-5477 fax
[email protected]
So far, I have been manufacturing them myself.
These are simple 1" NPT pipe nipples 4" long. I cut them in half, and then weld them back together with a metal disk inserted between the two halves.
The disk has a .07" pilot hole in it, which I use for the lowest flow. I then bore it out to the proper diameter for higher flows.
On both sides (and adjacent to) of the disk, I drill a hole for a 1/8" SS tube about 3" long, which is welded in.
The two holes are offset by about 20 degrees, so I can put tubing fittings on them without them hitting each other, because they are right next to the disk, and separated only by the thickness of the disk.
This gives me a nice orifice which I can pipe into an airline and measure the differential flow across the orifice.
The material must be stainless steel, though brass would also be acceptable.
It is used only for air at relatively low pressures (about 7-10PSI drop across the orifice, maximum, at a pressure of up to 100 PSI in some applications, though most are about 10"w.c.).
I can email a sketch or drawing to anyone who can supply these at a reasonable cost. Current annual usage is relatively low volume...maybe 50 or so.
Does anyone know where such an orifice can be commercially purchased? I can provide further specs, as required.
Thanks in advance.
Bruce Axtell
Engineered Control Systems, Inc.
763-421-8787
763-712-5477 fax
[email protected]