Yes. You all are correct. It is to prevent a maintenance tech from using a cheater bar.
I was successful in getting the spec changed, however, because I argued that it would weigh too much and be too cumbersome.
I am looking for a solid hand wheel (no spokes) for a valve application. The challenge is that I need it to be 16" in dia.
Anyone know a supplier? Thanks
tsenthil: you said, "pistons require more air pressure [than diaphragms]" I think you mean piston cylinders can handle higher pressures, right? The supply pressure and the required thrust on the valve are usually given. Then, you can size the actuator based on this and stroke. Usually...
This is very common for our company. You can install a spring or double acting linear pneumatic or hydraulic piston actuator on the buried gate valve using a threaded coupling block that pulls instead of turns. You can use the media in the pipeline to provide the operating pressure for the...
A couple of clarifications/comments---
Ashereng: You mentioned "torque", but remember, you might have a linear actuator which would require "thrust"
A linear pneumatic piston actuator is very common for globe control valves.
JLSeagull: Recall, you can have an air fail system used in...
I need to machine Inconel shafts 15" long and 2" in dia. I want to do it on a CNC lathe. What special consideration does this material need? Cutting tools, speed, etc.?
Thanks
Another question is what power source is available for the actuator? Better controllability while maintining speed is a challenge, but I have seen it done using a globe valve and linear actuator with both hydrualic and pneumatic sources to the actuator. Example: 8 seconds closing speed with...
