Re: Pneumatic Transport Of Quartz Sand
Dear Neval,
A life span of 10-15 days does not say much. A better approach is how many conveyed tons or operating hours.
In pneumatic conveying, quartz is a very abrasive material and valves do not like that.
The abrasiveness is magnified by the quartz velocities.
Therefore, the first option to minimize wear is by designing the pneumatic conveying system for the lowest possible velocities.
Whether your system is optimal for this condition can only be assessed by reviewing the installation data and performance parameters. (Installation geometry, air flow, capacity and pressure and particle size)
If you like to have the velocities calculated, please supply the installation data.
The location of the considered valve is also important.
Just after the pressure tank, a very high, instantaneous velocity occur at the opening moment of the discharge valve. (especially when the opening pressure is very high).
The type of valve (which you did not mention) is also relevant.
Pinch valve: No obstruction in the material flow when open. Initial wear of rubber sleeve after a while, with the risk of quartz entering the control pressure system when the sleeve is worn through or burst.
Slide- or knife valves: Do not close properly in material applications.
Butterfly valves: Often used in pneumatic conveying installations. To protect the face of the butterfly, often a round bar or half-round plate is welded in front of the butterfly in open position, protecting the disc side against impact. A replaceable round bar in two opposite sockets with plug is also a solution.
Other types of valves s.a. ball valves, dome valves, etc, I expect that those types of valves will wear because of opening and closing with trapped quartz between the seals rather than wear by the passing quartz.
If you need more information, let us know.
Have a nice day
Teus ■
Teus
Re: Pneumatic Transport Of Quartz Sand
Kindly give more details i.e. lean phase or dense phase system. Where the valve is placed in the system, what kind of valve is it.
Once a bit of detail is know some alternatives can be looked at. ■
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Re: Pneumatic Transport Of Quartz Sand
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Problems With Valves In Pneumatic Transport Of Quartz Sand.
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Mike Griffiths
Omegaslate UK Limited
2 Chirk Close
Forest Gate
Kidderminster
Worcestershire
DY10 1YG
Tel : +44 (0) 1562 755 824
Fax : +44 (0) 1562 742 979
Mobile: 07836 748 588
Web Site at:
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Ceramic Ball Valve
Originally Posted by Neval
Dear Bulkoholics,
We have a clien who has a problem with valves 125 mm, 5''. Some wear for 10-15 days and must be replased. Proposal for valvas?
Best regards
To use a ceramic lined ball valve to solve the problem.The hardness of Al2O3 ceramics and ZrO2 ceramics can reach HRA 86-88.You'll find something help at www.ceramic-valves.com ■
Re: Pneumatic Transport Of Quartz Sand
Originally Posted by NevalDear Bulkoholics,
We have a clien who has a problem with valves 125 mm, 5''. Some wear for 10-15 days and must be replased. Proposal for valvas?
Best regards
How about use the ceramic lined valve... ■
Pneumatic Transport of Quartz Sand
Problems with valves in pneumatic transport of quartz sand
Dear Bulkoholics,
We have a clien who has a problem with valves 125 mm, 5''. Some wear for 10-15 days and must be replased. Proposal for valvas?
Best regards ■