Exclusive and unique to SANDPIPER, the externally serviceable air distribution system (ESADS+) allows for quick and easy access to the pilot and spool valves. Ideal for applications where uptime is not optional, all SANDPIPER pumps feature ESADS+ technology for quick remote site serviceability under five minutes.
Independent of the pilot valve position, the cross-drilled pressure ports in the main directional air valve spool provide a pneumatic bias of the spool at either end of travel. This is accomplished by directing (inner) chamber pressure to the end of the spool, boosting and sustaining pilot pressure until point-of-shift of the pilot valve.
The benefit of this technology is the elimination of spool drifting due to vibration and/or unbalanced pressure or system conditions.
Primary system components = main directional air valve (with PATENTED cross-drilled pressure ports) and pilot valve
With the simple removal of only four bolts on the outside of the ESADS+ Air Distribution System, you can slide off the air valve and pilot valve components. This gives you quick access to the PATENTED, cross-drilled pilot shuttle containing the two O-rings that are the most common part to fail on any AODD pump.
With ESADS+, this process can be done in-line and takes around five minutes to complete. Competitor AODD pumps need to be removed from the line of service and dismantled completely in order to reach the same two O-rings–a process taking up to an hour.