Question for Dave Sutton - Page 2

Dave Sutton · October 11th, 2012, 01:11 AM

QC-6's never disconnect uncommanded, they are simply not prone to it. If you shut down the onboard cylinder after you select the offboard using either a valve or slide isolator, the entire thing is pressurized anyhow, and the pressurized QD's are even harder to disconnect that an unpressurized one. That's just not a problem.

Dave

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kwinter · October 11th, 2012, 11:55 AM

Quote: (Originally Posted by Dave Sutton)

Heck, I just open the valve that's installed at the offboard QD input and turn off the onboard cylinder valve. Makes it completely uinambiguous.

I completely agree. Relying on a small IP difference to automatically select your gas is like playing with a lit stick of dynamite IMHO. IPs tend to creep, and even a 1 bar difference has been well documented. Either ball valve or flow stop are much safer.

October 11th, 2012, 01:11 AM	#11
Dave Sutton Banned Join Date: Mar 2012 Location: Union Beach, New Jersey Posts: 1,281 Thanks: 73 Thanked 189 Times in 103 Posts	QC-6's never disconnect uncommanded, they are simply not prone to it. If you shut down the onboard cylinder after you select the offboard using either a valve or slide isolator, the entire thing is pressurized anyhow, and the pressurized QD's are even harder to disconnect that an unpressurized one. That's just not a problem. Dave .
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October 11th, 2012, 11:55 AM	#12 (permalink)
kwinter PITA Join Date: Mar 2012 Location: NJ-USA Posts: 313 Thanks: 48 Thanked 65 Times in 40 Posts	Quote: (Originally Posted by Dave Sutton) Heck, I just open the valve that's installed at the offboard QD input and turn off the onboard cylinder valve. Makes it completely uinambiguous. I completely agree. Relying on a small IP difference to automatically select your gas is like playing with a lit stick of dynamite IMHO. IPs tend to creep, and even a 1 bar difference has been well documented. Either ball valve or flow stop are much safer.
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