| 1) | Question: | How do they work? (What makes them better?, etc.)
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| | Answer: | Within the gland there is a piston which pushes on an internal gland follower. This is operated by instrument air at roughly half the pressure inside the equipment. I.E. if you are running a chip metering screw with an internal pressure of 30 PSI, the gland would take, roughly 10 to 15 PSI to operate.
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| | Question: | Why does it use so little pressure?
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| | Answer: | Since there is a piston pushing at equal pressure on the packing, there is such a big surface area pushing on the packing. Where is with a normal gland you only have 2 bolts which tightens the gland up so it is very hard to get equal pressure on the packing. When lower pressure is used to seal the packing box, the packing life is longer.
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| 2) | Question: | What are they made of and how are they made?
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| | Answer: | They are made from 316 stainless. They are cast in one piece, so there is no welding done on them, so there's no chance of cracking.
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| 3) | Question: | What type of packing?
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| | Answer: | Graphite is recommended but can be used with the packing of your choice. But when it's used in conjunction with graphite packing, flushing water is reduced considerably and, in some applications, can be eliminated, depending on the speed of the equipment (very slow equipment may not require it).
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| 4) | Question: | How do I install it?
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| | Answer: |
It threads onto existing
threads. If the packing box does not have threads
to allow threading the gland on, there is an adaptor plate for bolts
which can be attached
to the existing gland follower bolts. To do this
you would take the studs out and attach the adaptor plate.
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| 5) | Question: | What do I need to install it?
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| | Answer: | Instrument air, a regulator and a pressure gauge. The air line hook-up on the gland is for a 1/8" NPT thread.
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| 6) | Question: | What do you need from us to place an order?
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| | Answer: | Just measurements of the shaft size, packing box size, how many studs there are and the stud centres. Then we also need the distance from the packing box to the bearing. But, we do need exact measurements for each piece of equipment they will be used on.
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| | Question: | Why each piece?
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| | Answer: | Because they all wear differently through use, so the measurements may not be the same from one piece of the same equipment to another.
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| 7) | Question: | In your pamphlet you say the flushing water is reduced dramatically. Why is that?
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| | Answer: | Because there is no leakage. where with a conventional gland there is usually leakage spraying out all over the place.
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| 8) | Question: | I don't use water, I use grease so will it work for my equipment?
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| | Answer: | It works as well with grease. We have tested it successfully with grease in the Canfor, New Westminster, B.C. mill.
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| 9) | Question: | When they use grease, don't they find the grease hardens up?
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| | Answer: | Yes, this was one of the problems, so we are adding oil to the grease to keep it more pliable.
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| 10) | Question: | How much oil do they add?
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| | Answer: | They used a Kipp Lubricator, which gives a drop a minute.
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| 11) | Question: | What do they cost?
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| | Answer: | For standard 4" gland, the cost is $1988.00 CAD per gland, FOB, point of manufacture. This would be used on a typical chip metering screw. Individual cost will depend on shaft size, whether or not an adaptor is needed, clearance between bearing and packing box.
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| 12) | Question: | Delivery?
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| | Answer: | Standard glands, 6 weeks. Custom orders may take longer, depending on what is required.
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