Hunter 1.5 to 2" PGV's from what I have seen lately: 5 to 7 years (We do not like or install Hunter Valves)
Rainbird 1" DVF or PGA should be a solid 10 years plus.
Rainbird PEB's in all sizes: 15 years plus (We are going on our 16th year so that all I can say)
PEB's go in on all of our commercial and high end residential projects. The PEB is an awesome valve and the "scrubber" is all we use for non-potable water.
We do not install Toro, but they do make some damn good valves. Everyone just hates watching the bleed pins blow out of the valve box and then get lost. LOL