Rising vs Non rising stem
Rising vs Non rising stem
(OP)
Hi
Is there any basis for selection between rising and non rising stem for valve.
Thanks...
Is there any basis for selection between rising and non rising stem for valve.
Thanks...
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RE: Rising vs Non rising stem
Non Rising stem Gate Valves are normally cheaper than the Rising stem versions.
Why are you asking this question?
What is your potential use (purpose for this valve)?
Sometimes its possible to do all the right things and still get bad results
RE: Rising vs Non rising stem
RE: Rising vs Non rising stem
Rising stems are exposed to the elements and can become corroded, painted and require greasing on a regular basis.
Remember - More details = better answers
Also: If you get a response it's polite to respond to it.
RE: Rising vs Non rising stem
Be also reminded that knife-gate valves normally have the knives rising to free air (past body/knife sealings) on a non-rising stem. Also: some fluids (gas, steam, toxic, surrounding harming) will require all parts closed in, and a nonrising stem and closed bonnet is required.
In general, for harmless fluids, I agree with all above: it is mostly a practical and pricing question, if quality and lifetime els is about equal.