The standard Belleville stack is:) ) () () () () ( ( ||Bob
Belleville washers are also called disc springs.... They are a shallow metal cup that flattens under load.... That diagram is showing which direction the cup is facing (the straight lines indicate flat shims).... Some Ninja regs use thinner bellevilles on the ends (0.022") but most of their regs use 0.032" for the middle ten bellevilles.... I recently saw a 2000 psi reg. that used eight 0.047" bellevilles.... so go figure....The stack of washers replaces the coil spring inside the regulator.... It sounds like you have never had a reg apart, I suggest you do some studying, they can be dangerous.... The first thing you have to do is drain the tank to ZERO air pressure, of course....Bob
Here is the chart from their website.... sorry for the poor layout.... The thicknesses and part numbers (for stainless) are in bold....0.317" 0.625" 0.022" 0.042" 0.010" 70 105 12 9712K65 $3.92 12 9713K65 $8.34 0.317" 0.625" 0.032" 0.048" 0.008" 145 260 12 9712K66 $3.97 12 9713K66 $6.61 0.317" 0.625" 0.047" 0.059" 0.006" 300 600 12 9712K67 $5.37 12 9713K67 $11.11 You will also need a selection of flat shims, 5/8" OD x 3/8" ID.... this link may help.... http://www.mcmaster.com/#round-shims/=kocl5pBob
There are several "standard" stacks that work, have a look at my graph.... If you want 1600 psi, you could use twelve 0.032" bellevilles and about 0.020" of shims.... or ten 0.032" with an 0.022" on each end and about 0.040" of shims.... or ten 0.032" with a 0.022" on one end and about 0.060" of shims....Understand that the actual shim thickness you need will vary depending on the actual stiffness of the bellevilles you get.... It becomes a trial and error deal for the fine tuning.... Also, your regulator will have a 1.8K burst disc on the downstream side.... If you get too close to 1800 psi you will blow that disc and I guarantee it will scare the he!! out of you.... 1600 psi is pushing it with a 1.8K disc.... You can replace it with a 3K burst disc, but that may be too high to protect the gun in the event of a regulator failure.... Have you made sure the gun you plan on using it on is safe at 1600 psi?....Bob
Since you will be watching the gauge on the gun during filling, that should be OK.... If you were tethering while shooting and had a regulator failure, then 3000 psi into the gun would be possible.... Unlikely to cause a catastrophic failure if the valve screws are in good shape.... but pushing it....Bob
The regulator spring will have to be changed out for Belleville Washers.... Here is a chart I did using my regulator, but it is really only good as a guide, regs seem to vary a lot....The standard Belleville stack is:) ) () () () () ( ( ||Bob
All the Ninja regulator bodies I have seen are identical from 850 psi to 2500....Bob