As the current FRA rule set stands Stealth appears illegal on 2 points ........a seperate shut off valve and a low pressure PRD ......with the possibility of a 3rd infringement with the vent valve rating.

8.6.
Gas cylinders that do not incorporate a valve (for example: the gas is released as soon as the cylinder is screwed into it€™s mating pneumatic connection) such as found on disposable welding bottles and €˜fizzy drinks€™ machines must have an additional remote isolation valve accessible from outside of the robot.

And
8.8.
A certified pressure relief device [PRD] must be installed in each part of the pneumatics system where a different operating pressure is used (operating pressures separated by a pressure regulating device).

So it needs to be argued that the additional remote isolation valve isnt needed in this instance.

A PRD is in my opinion a must .......it isnt possible to quantify a bit of low pressure rubber tube that will rupture @ ??!!** psi as a safety device.

If it had a Low Pressure PRD and a vent valve to match the PRDs rating ....Id be happy with it.

Woody

Edit
It should be possible to combine the function of pressure dump valve ...... in the unlikely event of the flipper being locked down ... with the vent valve IF it has a manual overide.

(Message edited by woody on September 21, 2006)