Yong Heng and 10m Air Rifle

[eric1514]

Hi folks,

I have a Walther LG200 that uses a removeable 300 bar cylinder. I have the proprietary Walther adapters that screw into the cylinder and have male 300 or 200 DIN threads on the other end. I used to leave the adapter screwed into a SCUBA tank and screw the cylinder onto the tank to refill it. I want to use a compressor now.

From all that I been able to learn, the Yong Heng compressor has a hose that terminates with a female quick disconnect. First off, I need to locate a piece of metal that has a male quick disconnect on one end and female 300 Din threads on the other so I can screw my adapter into it and attach the whole affair to the hose on the compressor. That piece is proving hard to find.

Second, when the Walther air cylinder is screwed onto the adapter it will empty. If it is attached to the compressor, that means it will pressurize the hose and that doesn't seem like a good idea as it makes the compressor start under load. Maybe the solution is drain the cylinders and start from empty instead of topping them off. They're pretty small. It's also possible I don't understand how any of this works

Am I going about this wrong? If anyone has done this or similar your knowledge and experience would be greatly appreciated.

TIA,Eric

 

[csitas]

you need to invoke check valves so you can save your air and, start the compressor without the load on it. It can't stand that . You'll burn it up right away.

 

[scotton]

I have a Hammerli AR20 that uses a Walther air cylinder that's the same as yours. I have an adapter that screws into the cylinder with a male Foster on the other end. When filling the air tank from my Yong Heng, I attach the hose to the Foster fitting on the adapter and screw the adapter into the tank a few turns (not enough to hit the check valve in the tank). Then I start the compressor with both bleed screws open. Then I close the bleed screws on the compressor and screw in the adapter on the tank. The tank fills up, and when its done I unscrew the adapter until the check valve on the tank closes, then I open the bleed screws on the compressor and turn it off.

It's not very elegant, and I lose a little pressure from the tank when unscrewing the adapter, but it doesn't put any extra load on the compressor.

 

[eric1514]

I have a Hammerli AR20 that uses a Walther air cylinder that's the same as yours. I have an adapter that screws into the cylinder with a male Foster on the other end. When filling the air tank from my Yong Heng, I attach the hose to the Foster fitting on the adapter and screw the adapter into the tank a few turns (not enough to hit the check valve in the tank). Then I start the compressor with both bleed screws open. Then I close the bleed screws on the compressor and screw in the adapter on the tank. The tank fills up, and when its done I unscrew the adapter until the check valve on the tank closes, then I open the bleed screws on the compressor and turn it off.

It's not very elegant, and I lose a little pressure from the tank when unscrewing the adapter, but it doesn't put any extra load on the compressor.

Thanks for that. I was curious as to the sequence of it all. So you have an adapter that doesn't use DIN threads at all? That's another route I hadn't thought of. Do you happen to remember where you got that? 

Thanks, Eric