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The temp is less than 175F. From the Gosco website, the M-class looks promising. It seems to be a bit more robust than what i am currently using. My guess that comes at a significant cost. How does it handle high viscosity material (>250,000Cp)?

All, Just catching up on the threads thanks for the help. Just a quick update on status. We're still in the process of trying different packing to address the leakage of stems. Currently looking at UHMWPE material. I've looked at other valve types but havent found a slab gate valve for the...

One other thing to note, we use 2" valves.

Thanks for the help. the temperature is ambient, and not a issue. This has a live loaded stem (Manufacturer is Sharpe Valve) but i will check on the o-ring sealed bushing and the junk ring. I haven't found a ceramic valve that will handle the pressures but will look at VTI and Mogas.

Looking for suggests for an application i am working on. Our process involves using a high viscosity, highly abrasive material in which we control the flow using a pneumatic actuated metal seated ball valve. Initially we had issues with the valves failing to open (prior to switching to the...