I have come across p/t charts indicating different p/t ratings for F316 and F316L (720 psi and 600psi up to 100 F) what specification governs these ratings?
When a flange is supplied with the dual grade of 316/316L which pressure rating would apply?
Are there any p/t charts indicating p/t...
I am looking for data on an old Dresser "450" series AWWA butterfly valve. Does anyone know who may have bought out this division of Dresser? Or would anyone have any information on this valve?
Any leads would be greatly appreciated.
Thanks,
The only situation is their deadman handles are limited to the size of valve you can use.
The fusible link assemblies use the same concept, difference is they have the "link" retaining the handle in position (against the spring). You could possibly use this style, just disconnect the fusible...
The sizes of your valves could produce a challenge. What type of valves were looking to use? Service conditions?
Depending on the size and type of valves used the "spring mechanism" could be quite large to overcome valve opening/closing torque. Unless your client is a very big gorilla, :-)...
It appears what you are looking for is a "dead-man handle" and generally used on ball valves, tho' typically they are normally closed. I don't see why it couldn't be configured as normally open. Often you will see this type of spring return handle assembly in conjuction with a fusible link for...