Quote Originally Posted by kane
Independently is meant as in by a 3rd party.
That is what I make of that phraze.
On the other hand, when changed the rules to that exact wording?
And, it's only recently people start to worry about it. Strange I have to admit.

Strictly speaking, those using components in a full pressure system such as a 5404 Burket valve should either have devices fitted to limit the pressure of the system or provide test documentation proving otherwise. For example a pressure relief device set to 50 bar would be suitable, alternatively use a regulator to reduce the pressure.
Funny, Project Two suffered that problem during an event. The PRV started to vent pressure when a sun heated pump-filled bottle was opened. meaning the pressure was over the set limit. After losing 100 gram of CO2 the system was a tad chilled, and the pressure was below the treshold. Meaning it will freak out people opening a fresh bottle because the PRV starts to vent.
POP-POPPOPPOP... Pop.......pop.......po..p

Valves rated for full pressure are available but I believe the 5404 is used due to the high flow rate capability coupled with the high pressure rating.
Actualy it's a tad different.
The Burkert 5404 is used by a lot of us, because it's the only affordable , commercialy available valve that can do the job. Albeit for dependability, overvolting a 24V coil.

Quote Originally Posted by terry
We use BURKERTS which are rated to 50bar aswell, were they tested and certified to handle the higher pressure ?
The Burkert 5404 is rated at 50 bar for reliable duty cycles. The real pressure rating goes way above that.

Bigger Brother and Dantomkia were among the first machines using that valve, way back during the BBC series, and Spitfire in Battlebots.
To get accepted by the more rigorous Battlebots pneumatic rules, Mike Lambert had the Burkert 5404 pressure tested. The results were simple. The body can take pressures over 1500 psi without failing. The 24V soleno¯d on the other hand isn't reliable over 750 psi @ 24V. Meaning it sometimes won't open the valve. (shit, a flip that didn't go off)
The solution to that is to overvolt the soleno¯d. That coil it ment to take 24V for months, even years, so bursts of 36V won't hurt nor burn it. And even it would burn trough, it just ends up with a non working weapon. What outside the arena should be pressureless according the rules.

I will point out that non of the Burkert 5404 failures were the result of a non damaged body. Most of the times it was lack of power in the solenoid to pull the plunger against the pressure-drop; or by swarf/dirt between the shuttle and bodyseat.

Another pneumatic weapon failure is rather electronicaly. If the RC switch passes electricity the valve can be open. But that too can't be blamed at the Burkert.

Even a full hit of Little Hitter on the stainless steel solenoid tube in Hannibalito 1s Burkert didn't cause any leakage nor catastrophic failure of the valve.
It just didn't work anymore, the valve stayed open when pressure was applied. Rasing the flipperarm gently and blowing off CO2 trough the dump home when the bottle was opened and the buffertank filled.

We replaced the solenoide/plunger tube, and H1 was ready to rock again.