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An Overview of the PIV Series PEEK Isolation Valves


Clippard's PIV series media isolation valves feature a unique one-piece valve stem that functions as a sealing membrane while also supporting and centralizing the poppet in the seating area. This multifunctional diaphragm/poppet results in a simplified design with few parts, longer life, and minimal dead volume. All wetted areas of the valve are PTFE or PEEK, making this series ideal for use with corrosive media. Check out this quick video from Product Manager Attila Kiss to learn more.

Video filmed at Clippard in Cincinnati, Ohio


Hello, let’s quickly review Clippard’s PIV series isolation valves.

If you are familiar with Clippard’s NIV series media isolation valve, this is very similar; only the PIV series utilizes PEEK material for the valve body, which may bring some advantages over the NIV series. The wetted materials of the PIV valve are a PTFE diaphragm and a PEEK valve body.

The combination of these two materials has one potential disadvantage over the NIV line but also provides two clear advantages.

The potential disadvantage is material compatibility. The NIV PTFE series is 100% PTFE, whereas the PIV is both PTFE and PEEK. So be sure to check the compatibility of your media.

Ok, now the advantages. By utilizing PEEK material for the valve body, the PIV series is able to achieve higher operating pressure. The NIV series maxes out at around 30 psig, while the PIV series is rated up to 100 psig—a clear advantage if you require higher operating pressure. The second advantage is life. With the durability of PEEK, the PIV series has nearly ten times the life of the NIV series.

So, if your duty cycles are high and you need a longer life, yet do not need the chemical compatibility characteristics of PTFE, then the PIV is the right valve for you.

Like the NIV series, the PIV is available in four orifice sizes, each as a 2-way normally-closed, 2-way normally-open, or 3-way selector/diverter. The valve series is very compact and lightweight in design. All valves can be used bidirectionally and have minimal dead volume compared to other diaphragm valves on the market. Except for the NIV series, of course… Because they’re identical.

Clippard manufactures this valve series ourselves here in the U.S. in Cincinnati, Ohio. As the manufacturer, we completely control our processes and production, which assures you of our quality and gives you flexibility in design. You can customize the valve body, materials, threads, pressure, and electrical characteristics for your application.

Industries and applications that commonly use these types of valves to isolate gas or liquid include drug dispensing, laboratory equipment, analytical, chemical analysis, sampling, life science, biotechnology, genetic research, gas chromatography, spectrometry, DNA synthesizing, blood analyzing, printing, diagnostic equipment, fermentation, water treatment, and more.

Call us today for application assistance. I’m Attila Kiss, Isolation Valve Product Manager here at Clippard.