GTA
All Springer/NP/PCP Air Gun Discussion General => PCP/CO2/HPA Air Gun Gates "The Darkside" => Support Equipment For PCP/HPA/CO2 => Topic started by: renowntwo on August 08, 2012, 02:32:45 AM
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Well finally got the reg rebuild kit in now I need some advice about how many shims to add to got me around 1000 psi. The videos that I've watched all have been about droppings the pressure. My question is: how much will one red shim increase the psi ?
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If you are starting with the 850 psi regulator which uses a coil spring, ADDING shims may well put the spring into coil bind and cause the pressure to go straight to 3000 psi, blowing the burst disc.... The Ninja regulators intended for 1000 psi and up use a stack of belleville washers (disc springs) NOT a coil spring.... Here is a graph I did on shimming them....
(http://i378.photobucket.com/albums/oo221/rsterne/Important/NinjaRegulators.jpg)
Does your regulator have a coil spring inside or a stack of disc springs?....
Bob
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Mr. Rsterne, it has a spring.
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Thanks Mr. John B. I was under the impression it would be safe to do . But with yours and Mr. Rsterne post has me thinking that i should just order a new reg from ninja and have them set the output pressure for me. Do want to make a big bloom. LOL.
I see now why I never seen any video's of anyone increaseing psi on their tanks. Well back to the drawing broad I go.
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You can convert the regulator to use belleville washers instead of a coil spring, as the housing and piston are the same.... You will need the proper bellevilles (McMaster Carr) plus a selection of various thicknesses of shims.... If you're not comfortable with that, purchasing another reg is probably the best idea....
Bob
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You can get the shims & belleville washers (disc springs) from McMaster-Carr. They are 5/16" ID x 5/8" OD and come in .032" and .022" thick. Shims are also available there.
I have a regulated valve that Bob built for a disco that I replaced the coil spring with bellevilles. I use shims & springs that I got at MC.
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Mr. Rsterne & Rescue912, that's what I wanted to do ( DIY ). I always like to know how things work but I wanted to be done right. Now comes the question.
1. Mr. Rsterne looking at the graph I would only need 1 thin cup washer and shims it to 0.020" to get 1000 psi. Is that correct ?
2. After I remove the spring in the reg do I need anything to hold the belleville washer and shims in place? If so, can you tell me.
3. Does the shims have the same I.D. & O.D. of belleville washer ?
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Mr. Rsterne & Rescue912, that's what I wanted to do ( DIY ). I always like to know how things work but I wanted to be done right. Now comes the question.
1. Mr. Rsterne looking at the graph I would only need 1 thin cup washer and shims it to 0.020" to get 1000 psi. Is that correct ?
2. After I remove the spring in the reg do I need anything to hold the belleville washer and shims in place? If so, can you tell me.
3. Does the shims have the same I.D. & O.D. of belleville washer ?
Just throw in one shim and try it. If you get a third of the way there go three times as thick. I can sell you a 3K gauge on the top of a tank top to check output pressure. Budget reg checker $35 310-327-3582
I have a bunch of blank Ninja Bonnets and some marked 1200 and some 1400's I carry 800 & 1400 PSI 13 and 22 ci vessels and I also have Ninja Regs no tanks.
I used a Ninja Reg 1400 psi on My US FT HPA Regulated Heavy Varmint Benchrest AirRifle I took 3rd in the World Last year with. They work great.
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Yes, you are correct, one thin disc spring, plus the ten thick ones, plus a 0.020" shim.... That will get you close.... However, that data was done on ONE regulator, and they will vary a bit.... The standard disc spring stack looks like this....
) ) () () () () ( ( | |
There are one or two thin disc springs on the ends, depending on pressure range.... The flat shims are 5/8" OD x 3/8" ID.... I purchase all stainless ones (bellevilles and shims) from McMaster Carr.... If Tim has them available, that sounds even easier....
Bob
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Thanks Mr. Timmy, I will keep your offer in mind. Mr. Rsterne also thanks again for your keep. Will update yall soon on my progress.
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am i reading this right
you can take an 850psi regulator,remove the coil spring, replace it with belleville washers and shims(are the shims belleville,too?)
stack them in the order shown in rsternes post now its a high pressure regulator 1000psi-1500psi
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You can with a Ninja regulator for sure, I've done several, and the housings are identical.... They may have different burst discs, of course.... The shims are flat....
Bob
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thanks for the reply
i want to go hpa with a 2250b.i have read a lot of your posts on airgunhome
all safety margins will be followed
i dont know where i want my tank.intergrated into the stock or to use a drop down adapter
there are two that i know of the qb adapter and the jds adapter
i hear the jds adapter doesnt require the co2 cap threads to be cut off
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I would never mount a tank block where the tube is not full thickness.... ie I would cut off the threads.... The JDS has additional screw holes further from the end of the tube, which is a design weakness on the QB79 block....
Bob
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that makes sense to me !!
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Mr. Rsterne, went to MC web site and reseached the belleville washers and shims. I see that there are several to choose from. I now you said stainless steel 5/8x3/8. But I'm still.have a hard time picking the right ones. Is there any way that you could list the parts # for the correct ones? Example: shims in .020 comes in two different type . One being type 316 and the other is 18-8. Both seem to be resistant to moisture and corrosion
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General differences in the two types. I'd defer to rsterne's recommendations though.
Type 316 will have the best corrosion resistance and will be somewhat softer than 18-8 as it can't be hardened. 8-18 is a commercial grade alloy that is used extensively in low cot SS fasteners and may have a higher hardness but will corrode quickly if used in the wrong application (marine). I would think either type would work as the environment is not "hostile".
Tom
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Thanks for the infor Mr. Tom.