Pos Air Shutoff
Only a few oil outfits require the POS valve for diesel trucks to be on-site, even fewer check. The gas transmission companies are the worst for having natural gas leaking from somewhere, the truck will get a snort and you get a bit of a pull, but you usual clear the field in seconds. You really need some boost for the truck too really light and run off. It usually happens to the diesel welders that people use on the welding trucks, they just over rev and blow-up.
CYA Mike. Having it is worth not getting hassled if something goes wrong. The "weather vane of blame" need not land on my plate during a plant evac. Something stupid happens on location and everyone gets the rubber glove whether its your fault or not. Same reason I have to carry a 30lb fire extinguisher, I am not a fire fighter, but need it anyway.
CYA Mike. Having it is worth not getting hassled if something goes wrong. The "weather vane of blame" need not land on my plate during a plant evac. Something stupid happens on location and everyone gets the rubber glove whether its your fault or not. Same reason I have to carry a 30lb fire extinguisher, I am not a fire fighter, but need it anyway. 


It's actually an ERCB requirement at least during well servicing op's that any diesel engine closer than 25 metres to the wellhead must have one. Not sure about any of the other big guys-CNRL's policy is every one must have at least a manually operated one while tank trucks have to have an automatic one. The one on my truck is automatic-as a manual trip one does you absolutely no good if you're not in the cab to trip it at the time of need-and operator's trucks get left unmanned and running quite often especially in the winter when you're using your trusty exhaust hose to thaw out whatever's frozen off and causing grief....My brother had the tank truck he was running at the time run away-from 1000 rpm to as-fast-as-it-would-turn instantly-by the time he tripped the shutoff the motor was toast-but I'm sure the shutoff saved him from becoming toast as well. It's in the vein of fire-retardant clothing, steel-toed boots etc.-you are probably going to go through life not needing them, but if you do, you'll be glad that you had them.... 
We have to carry 30# extinguishers as well, but I have been told by more than one safety guy that they would prefer you hit the big red button (where applicable) on your way out of harm's way-would be nice if you at least tripped your extinguisher on the way to make it look like you cared. Having said that, it's amazing on the fire field at Global what you can actually put out with a hand-held extinguisher-not that I plan on trying my luck in the real world with one. The 150# wheeled extinguishers are basically there for show-only time I could see ever using it is trying to rescue somebody that was trapped. One of our safety guys wanted to donate them all to the local volunteer fire departments-although technically now we are not supposed to let them on-lease either-stay at the gate and control grass fires etc. that get off-lease and wait for Firemaster etc. to show up for the big stuff.
Jason

We have to carry 30# extinguishers as well, but I have been told by more than one safety guy that they would prefer you hit the big red button (where applicable) on your way out of harm's way-would be nice if you at least tripped your extinguisher on the way to make it look like you cared. Having said that, it's amazing on the fire field at Global what you can actually put out with a hand-held extinguisher-not that I plan on trying my luck in the real world with one. The 150# wheeled extinguishers are basically there for show-only time I could see ever using it is trying to rescue somebody that was trapped. One of our safety guys wanted to donate them all to the local volunteer fire departments-although technically now we are not supposed to let them on-lease either-stay at the gate and control grass fires etc. that get off-lease and wait for Firemaster etc. to show up for the big stuff.
Jason
Hey guys, I know this is an old thread but BD Diesel has just released its Positive Air Shut-Off.
When you need an emergency engine shutdown system, then BD has the solution that is hard to PASs up. Some industries such as mining, oil refinery, forestry, septic removal and refueling require some vehicles to have an emergency engine shutdown in place the most effective method for this is to cut the air supply to the engine ensuring fuel ignition to cease. With BD's Positive Air Shutdown (PAS), an inline butterfly valve is placed in the air intake line and when activated by its heavy duty electrical solenoid, the engine will shutdown within seconds.
The PAS butterfly valve design simplifies the number of parts and reduces the overall size as compared to competitive units and uses aluminum and stainless components plus weatherproof electrical connectors to prevent corrosion. Easy installation with no welding needed for hose beads by utilizing innovative bead boot locks. Standard applications include over-speed electronics and CAC pipes included for some vehicles.
When you need an emergency engine shutdown system, then BD has the solution that is hard to PASs up. Some industries such as mining, oil refinery, forestry, septic removal and refueling require some vehicles to have an emergency engine shutdown in place the most effective method for this is to cut the air supply to the engine ensuring fuel ignition to cease. With BD's Positive Air Shutdown (PAS), an inline butterfly valve is placed in the air intake line and when activated by its heavy duty electrical solenoid, the engine will shutdown within seconds.
The PAS butterfly valve design simplifies the number of parts and reduces the overall size as compared to competitive units and uses aluminum and stainless components plus weatherproof electrical connectors to prevent corrosion. Easy installation with no welding needed for hose beads by utilizing innovative bead boot locks. Standard applications include over-speed electronics and CAC pipes included for some vehicles.
Only a few oil outfits require the POS valve for diesel trucks to be on-site, even fewer check. The gas transmission companies are the worst for having natural gas leaking from somewhere, the truck will get a snort and you get a bit of a pull, but you usual clear the field in seconds. You really need some boost for the truck too really light and run off. It usually happens to the diesel welders that people use on the welding trucks, they just over rev and blow-up.
Been to lots of plants, wells, and pipeline stuff, know body that I work for ask for the valve. If they did, I would drive my gaser to that company site. Lots of sites don't even do the sniffer test to get your vehicle into the classified location. I'm not saying that its a bad idea, but how can a gaser with 8 lighters under the hood be safe, and to be idled all day long. If anything the diesel would just over rev the engine. To do that you need lots of gas. The biggest reason that there is PAS valves, is for the welders welding remote units.



