It can be found here.

Further details on the VEX3 series can be found here.

The VHK series catalog can be found here.

The VHK series catalog can be found here.

The VHK series catalog can be found here.

The VQ7-6/VQ7-8 series catalog can be found here.

Further details can be found here.
Though it depends on the usage, stopping for a few tens of seconds should not cause the stop position to shift much, but holding the position for a long period of time is not possible.

(Refer to the FAQ about switching failure, which can be found here.)
For normally closed use: Plug the B port and pipe to the A port.
For normally open use: Plug the A port and pipe to the B port.
Note) Do not plug the exhaust ports (EA or EB); instead, mount a silencer.

The new VT307 series catalog can be found here.

The new VT307 series catalog can be found here.