Human maneouvring effort for closing a valve
Human maneouvring effort for closing a valve
(OP)
Hi All.
I have a question regarding the human maneouvring effort for opening and closing a valve.
I have an specification regarding the maximum permissible tangencial force based on the maximum lever and the handwheel diameter.
The application of this valve is for sea water in a submarine.
The values are as follows.
DN - Maximum Lever arm lenght - Handwheel diam - Force <20 - 150 mm - <120 mm - 120 Nm
<20 - 150 mm - <150 mm - 250 Nm
<20 - 180 mm - <350 mm - 350 Nm
<30 - 230 mm - >350 mm - 400 Nm
I wonder if there is any standard to check whether the above values are resonable.
Thank you very much for your help
Jaime
I have a question regarding the human maneouvring effort for opening and closing a valve.
I have an specification regarding the maximum permissible tangencial force based on the maximum lever and the handwheel diameter.
The application of this valve is for sea water in a submarine.
The values are as follows.
DN - Maximum Lever arm lenght - Handwheel diam - Force <20 - 150 mm - <120 mm - 120 Nm
<20 - 150 mm - <150 mm - 250 Nm
<20 - 180 mm - <350 mm - 350 Nm
<30 - 230 mm - >350 mm - 400 Nm
I wonder if there is any standard to check whether the above values are resonable.
Thank you very much for your help
Jaime





RE: Human maneouvring effort for closing a valve
I have a question regarding the human maneouvring effort for opening and closing a valve.
I have an specification regarding the maximum permissible tangencial force based on the maximum lever and the handwheel diameter.
The application of this valve is for sea water in a submarine.
The values are as follows.
DN - Maximum Lever arm lenght - Handwheel diam - Force
<20 - 150 mm - <120 mm - 120 Nm
<20 - 150 mm - <150 mm - 250 Nm
<20 - 180 mm - <350 mm - 350 Nm
<30 - 230 mm - >350 mm - 400 Nm
I wonder if there is any standard to check whether the above values are resonable.
Thank you very much for your help
Jaime
RE: Human maneouvring effort for closing a valve
RE: Human maneouvring effort for closing a valve
RE: Human maneouvring effort for closing a valve
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RE: Human maneouvring effort for closing a valve
A young man about to die may swing this, but design for more reasonable day-to-day operating forces.
RE: Human maneouvring effort for closing a valve
Those are relatively small handwheels as well, so a person would be able to apply as much force compared to a larger hand wheel, where you could use your body more....with the small ones it's all your arms.
RE: Human maneouvring effort for closing a valve
It is much appreciated.
Cheers
Jaime
RE: Human maneouvring effort for closing a valve
Else the operator would of specified a BGO and automate the valve cycle, as cheap as they are.
Kenneth J Hueston, PEng
Principal
Sturni-Hueston Engineering Inc
Edmonton, Alberta Canada
RE: Human maneouvring effort for closing a valve
Thanks for the info.
I have found a french standard for the torque:
NF E 29-470
Thank you very much
Jaime