In many different types of applications and systems, the need for high purity components is an essential consideration. This is true in many types of chemical processing facilities, food, and beverage production systems, as well as in clean room applications and processing plants.
However, even when high purity is not required within the system, it is still important to consider the benefits of corrosion resistant valves. There are several reasons why investing in these valves provides greater cost savings in the operation of the system.
Materials
Metals and alloys, including those treated and finished with corrosion resistant processes, can become corroded over time. In addition, the contact with specific types of chemicals can speed up the corrosion even with passivation processes and the use of stainless steel, bronze or copper, all common metals used in the manufacturing of valves across industries.
Using plastics, including PTFE or polytetrafluoroethylene, is an ideal way to create corrosion resistant valves. Not only is this material chemically inert so it does not react, but it is also impervious to corrosive materials as it offers a non-stick surface.
With the inability of the corrosive materials or chemical compounds to adhere to the surface of the valve, there is an extremely limited risk of any type of damage to the surface of the valve. To provide maximum resistance, the entire wetted area of the valve should be PTFE coated.
Longer Life Cycles
Without the risk of corrosion, there are lower rates of valve failure or leaks with corrosion resistant valves. They also last for a much longer period of time in the system, lowering the cost of replacement and lost downtime during the removal of the old valve and installation of the new.
While slightly higher in cost than standard alloy and metal types of valves, the PTFE valves offer a range of benefits well worth considering for any application.