Ratio
The ratio represents the multiplication factor by which the cylinder operates. By making an adjustment in the intensification pressure, the cylinder may be operated at a wide range of available force outputs.
Power Stroke
The power stroke represents the stroke the cylinder will have in the working portion of the sequence of operation. The OHMA cylinder initially strokes to the work at the low force. Once contact is made, the intensification stage is sequenced to produce the actual work force. The power stroke is limited to and is a function of the cylinder's internal configuration.
Overall Stroke
The overall stroke is the sum of the available advance stroke and the power stroke. Advancing the cylinder the length of its overall stroke before intensification will result in the cylinder bottoming out. This could lead to a cylinder breakdown. Aside from this stipulation, the OHMA cylinder will function consistently at any advance stroke position.
Bleeder
Most OHMA cylinders are equipped with bleeders. Weld cylinder styles normally have the bleeder located on the rod. The bleeder has been included to facilitate the purging of air, if required, from the fluid portion of the system. Normally, the cylinder is self-bleeding since the fluid reservoir is mounted above the cylinder fluid port and air naturally travels out of the cylinder to be exhausted via the fluid reservoir.
If the fluid reservoir begins to loose fluid, either through normal atomization or the cylinder's lubrication requirements, the fluid level may eventually drop below the recommended level where the fluid may start to aerate. In such situations, the fluid reservoir will require an addition of fluid to return to its proper operating level and the bleeder may need to be used to release any air which may be trapped in the system.
Seals
The OHMA cylinders make use of standard BUNA N 70 Durometer O-rings & one high pressure "Uni-Seal". The Uni-Seal is loaded U-cup seal which withstands the high pressure developed in the cylinder.
