[Al Skierkiewicz]

Mike,
This issue was raised last year and I was in contact with a few of the IFI people who assured me that the products they are selling meet our specifications. The 0.9 MPa is the guaranteed max pressure which converts to 130psi. The working pressure of 0.7 MPa (~100 psi) is the guaranteed working pressure (the valve will not bypass air at this pressure or below). As our working pressure is specified by robot rule at 60 psi or less, these valves are a good choice for our application. WildStang used the four port manifold last year and were very happy. I am sure it will show up on this year's robot as well (when it gets built).
In general, teams should review the operating recommendations for the valves they use. While lower working pressure is legal under the robot rules, some valves are not guaranteed at pressures below 40 psi. Some valve designs require a minimum pressure to both seal and move. Your mileage may vary.