Choosing the best industrial valve for specific services

Valve choice can have a huge impact on plant operation, safety and profitability. Industry trends, short term economic considerations and
resistance to change often result in the wrong valve being specified in new line applications. Similarly, replacing a valve in an existing line
requires careful consideration. Ordering an identical valve simply because it is the same as the one installed can perpetuate an existing underlying
problem – and waste an opportunity to improve efficiency.

For example; specifying a basic, low cost isolation valve (typically a ball valve) is a common choice for compressed air services.  On the face of it,
this would seem to be the logical choice. A ball valve costs less than a diaphragm valve and works satisfactorily until wear and tear takes its toll and
replacement becomes necessary. However the ‘cost of ownership’ equation is not as simple as measuring the purchase price of the valve against
expected service life.   Air leaks, however minor, will cause the compressor to work overtime to maintain line pressure (increasing operating costs
and reducing service life). Moreover, it will be necessary to replace the entire valve to keep the line running in the event of valve component failure. 
In addition to the price of the replacement valve, consideration must be given to the cost of holding stock - and shutting down the line while the valve
is replaced. Essentially, a valve costing 10 times more can end up being ½ the cost over its service life.

Specifying a diaphragm valve for compressed air services can be a much better solution in the longer term. While initial purchase price may be
higher, class VI shutoff provides superior line integrity, spare parts inventory is limited to inexpensive diaphragms and the valve can be serviced in-line
(diaphragm replacement generally takes less than 5 minutes).

Before you specify a valve for any application, talk to a KDV technical sales representative about the available options. We offer a wide range of valves
for a variety of industrial applications. Our comprehensive knowledge base - developed over the course of 30 years servicing the flow control
industry – will help to ensure that you choose the best valve for every application.