PSI Calculations - 10-Ton Driptech Rosin Press

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PSI Calculations - 10-Ton Driptech Rosin Press

Alright, here's my "somewhere in the ballpark" PSI calculations assuming the Cylinder Effective Area is somewhere in the 14.5 cm/2 neighborhood. I've looked at a few cylinders that are all just a bit taller than what's used with the dabpress hr10t35v.  

This is only my guess at this point, but I think it's worth putting out there as it should be useful until the true data comes in! 


So 8900PSI is 625kg/cm2 

Diameter of hydraulic cylinder: ??cm

Square/cm = 14.5? 

So 8900 psi ( read on gauge ) = 14.5? x 625 = 9062kg = 9.98 Ton = 19960 pounds 

So lets say that you wanna apply 1500 PSI to an 8 sq/in puck made using 2x4" pre-press mold, you need 12000 pounds of pressure. 

5437 PSI on gauge = 14.5? x 375 = 5443kg = 6 tons = 12000 pounds 

For a 1.75" cylinder shaped puck from using 30mm pre-press mold, 2.4 sq/in at 1500 PSI you need 3600 pounds of pressure. 

1593 PSI on gauge = 14.5 x 112 = 1633kg = 1.8 tons = 3600 pounds 

For a 2.5" cylinder shaped puck from using 40mm pre-press mold, 4.9 sq/in at 1500 PSI you need 7350 pounds of pressure. 

3280 PSI on gauge = 14.5 x 230 = 3335kg = 3.67 tons = 7350 pounds 

Useful links - 

PSI to kg cm/2 chart - 

I hope I didnt screw any of that math up, I'm a bit out of my element with this but think it's correct? 

Basically you will want to figure out the sq/in of your puck size, which means generally you'll have a pre-press mold or filter to contain the puck. The 30mm mold will flatten out to approx 1.75" (2.4 sq/in) round puck, the 40mm will flatten out to about 2.5" (4.9 sq/in). Rectangle pucks are easier math, length x width = sq/in puck size. 

Somone likes his rosin at 1500 PSI and it is definitely a sweet spot, can obviously press higher or lower pressure depending on your preference, but for the sake of giving PSI for buds without overpressing 1500 PSI is a nice spot.

1 comment

  • Posted on by One confused mofo
    I have the 10-ton driptech with the pump/gauge you bundle with it. I’m using 2×4 bags, but I’m never filling them to the brim. I’ve had SOME success pressing flower using bottletech, but I’m definitely wasting a ton of rosin.

    I do not have a prepress, I’ll buy one when I can afford one. But until then, I’m just pressing small amounts with guesswork.

    My temps are generally set between 180-215, and I think that’s perfect.

    What I’m having trouble with, is finding the right time and pressure for my runs. I cannot, for the life of me (even with the many equations on how to calculate surface area of the puck size) figure out what time/pressure are even in the ballpark of where I should be for maximum yields.

    I realize a prepress will help solve this problem, but for now, I’ve got an oz of cheaper flower, and an 1/8th of kief I need to press.

    So my real questions are, for, say like a gram of kief in a trimmed 2×4 bag layed out flat, what should my psi be near on the pump’s gauge? Do I really have to break out a tape measure and get the exact dimsnsion of the bag every time? How long should I preheat for? And how long should I actually be applying pressure for, including ramping up the pressure? Does the timer start when the gauge first registers pressure? Or when it’s reached it’s max desired psi?

    Sorry I’ve had to come to you to find this stuff out, but many hours of fruitless research and conflicting opinions have led me here. I own your complete setup, so I assume you’re the best people to answer my questions.

    Any help or advice would be greatly appreciated!

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