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Since a single-stage pump becomes considerably more difficult to push the closer it gets to a high fill pressure, this staged technique makes stroke effort acceptable even as pressure rises toward the operating target. That lower per-stroke effort adds up over the dozens of pump cycles required to reach a full fill for anyone filling reservoirs regularly rather than as a sporadic backup to a compressor.
For PCP air rifles, where moisture can damage internal components or alter firing consistency over time, an integrated oil-moisture filter eliminates water vapor and oil residue from the air before it reaches the reservoir. This filtration is integrated into the pump itself rather than requiring a separate inline filter attachment, eliminating the need to purchase, maintain, or keep track of an additional piece of equipment.
Since moisture and oil buildup inside a hand pump can gradually deteriorate seals and lower compression efficiency over time, dry, filtered air is also important for the pump's internal components. This filtration safeguards both the air system being filled and the pump performing the filling for anyone using this 3 stage PCP airgun hand pump through several fill cycles over the course of a season.
Instead of using welded or joined portions, the pump tube is constructed from a single piece of stainless steel, eliminating seam areas where wear or leaks typically start to appear on lower-quality hand pumps. A thicker outer case provides additional defense against dents or impact damage from frequent handling, storage, and transportation between shooting sessions.
Without compromising the strength required to withstand repeated high-pressure strokes, the pump's one-piece construction also keeps it lighter than a similar design constructed from heavier connected components. The combination of a seamless tube and reinforced housing keeps the pump operating reliably well past its initial season of use for anyone using it as a regular part of a shooting routine rather than as an occasional backup tool.
This pump is rated to a maximum of 4000 PSI (27.58 MPa), above its working pressure of 3600 PSI, providing a margin over the typical fill aim rather than operating at its absolute limit during routine use. The pump's long-term dependability depends on that additional headroom, since parts that operate constantly at their maximum rated pressure typically wear down more quickly than those with built-in margin.
The pump will perform more steadily stroke after stroke rather than laboring as it approaches its true ceiling if there is a gap between working and maximum pressure. This is because the pump won't be struggling to reach every standard fill. That built-in tolerance helps maintain consistent results fill after fill for anyone filling reservoirs to the higher end of usual PCP working pressures.
To prevent overfilling, which can strain a reservoir or air system beyond its rated capacity, a high-precision pressure gauge shows real-time readings throughout each fill. Instead of a pressure the pump produces on its own, the gauge reads throughout a range of 0-5800 PSI, a display range designed with headroom considerably beyond this pump's 4000 PSI output.
Instead of needing additional lighting only to check the gauge accurately, a night-visible display maintains those readings readable in dim garages, basements, or evening shooting sessions. For someone filling by feel in low light, visibility is just as important as the gauge's accuracy because a reading that is difficult to see negates the whole point of having a gauge.
The pump is connected to whatever is being filled by a 22-inch (560mm) hose, which provides sufficient working length to allow the pump to be positioned comfortably without the tube itself having to be placed right next to the fill valve. Whether the pump is being utilized for its primary function or for the secondary jobs it is designed to perform, that length is effective.
Although designed mostly for air guns, this 3 stage PCP airgun hand pump can also handle tires for cars, motorcycles, bicycles, kayaks, balls, and other common inflatables. This makes it a useful single tool rather than one restricted to a particular use case. For those who own both air rifles and other inflatable equipment, this overlap allows one pump to do jobs that would otherwise require separate equipment for each.