Novel materials improve pump performance
A
Tri-Ark product story
Edited by the Engineeringtalk editorial team
Apr 18, 2002
One-Step and One-Step Plus from Tri-Ark are revolutionary new diaphragms for use in air-operated double diaphragm (AODD) pumps.
One-Step and One-Step Plus from Tri-Ark are revolutionary new diaphragms for use in air-operated double diaphragm (AODD) pumps.
Using a novel combination of materials, these PTFE protected diaphragms combine the chemical resistance associated with PTFE with the flex characteristics of an elastomer.
One-Step uses standard PTFE, whereas One-Step Plus features a modified PTFE which allows a much thinner outer layer to be used.
This maintains the same chemical resistance properties but increases flex life even further.
The proprietary material combinations ensure that the flexlife of the diaphragm is not compromised and results in a diaphragm capability of up to and in excess of 12 million cycles.
Key to the One-Step and One-Step Plus performance is the fact that the PTFE is chemically bound to the underlying rubber.
Since it is manufactured as one piece, the risk of separation normally associated with two-piece overlaid diaphragms is eliminated, increasing time online.
One piece construction avoids the possibility of leakage and also prevents abrasive particulate material getting between the PTFE and rubber which could cause damage and lead to reduced diaphragm lifetime.
Most sizes of the diaphragm also incorporate a fully bonded piston plate, again eliminating potential sources of leaks.
The integral piston plate makes installation easier, as well as helping to reduce inventory for the pump operator by removing the need to purchase inner and outer piston plates and associated fixing materials.
(This was Engineeringtalk's Top Story on 17 April 2002).
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