The pressure depends upon a number of factors especially the load that they are expected to carry.
If the "new" van is second hand are you sure that they are the correct tyres for the van? In the leaflet I have referred you to you will see that tyres may have the weight and pressure on their rim. If your does have and it is less than the MTPLM of the van then the tyres are incorrect.
Phil
------------- If you're not on a fell your wasting your feet and for 2014 it's.......Feb Castleton Mar North Yors Moors; Apr Sutton on Sea; May Thirsk; Jun Clapham/Riverside (Lakes); July Wharfedale; August Crakehall; Sept Knaresborough; Oct Wirral Park/Clitheroe
Thanks for the info guys, I'll be looking in to it, especially what you suggested cwdc56768, thats much appreciated.
As it's a secondhand van I suspect I'd better see about checking them out.