[martin417]

If you order a K version of any SMC valve, it is rated at 145 PSI. When constructing the part number, you just have to select the "high pressure" option. The part # will look something like this:

VQZ2120K-6G1-N7

This is a vqz2000 series valve with a metal seal, Cv is .3 in one
direction, .32 in the other. Max pressure 145 PSI. It has 1/4" one touch
fittings on the work ports, 1/8" NPTF on the pressure and exhaust ports
and can be mounted on a manifold. It operates on 12 volts, and has lead wires attached to the coil (no plugs)


The K indicates high pressure, or a 145 PSI rating.