Diagram dump

[JimBobFett]

How to plumb a Fabco MSV-2 and a Clippard PAVO-3 to make a 4/5-way valve (to control a double-acting cylinder):

Yes, someone asked how to do this so I wanted to post it for all to see. Haven't had time to whip it up in CAD and make it all purdy, but there it is!

[knownothingmags]

maybe im missing the intention of the PAVO but how are you going to get that to fit like the the MPA-3 does? its too wide.
for the MPA-3 i mill the sides down to that it fits for installs.

EDIT* never mind i see whats happening now.
still is the PAVO acting as the ram?

[JimBobFett]

http://www.clippard.com/static/image...051f9d-900.jpg

This isn't needed for the MPA-3 since it is a single-acting (air advance, spring return style) cylinder. This is for running rams/cylinders that have an air port for advancing and returning. Actually, in the above diagram, I have the cylinder reversed to that it will retract when the trigger is pulled and activates the MSV-2. Oops! Most people will want to plumb that cylinder in reverse! My bad! Lets pretend that I drew that diagram with the ports flipped for this explaination:

The PAVO-3 isn't quite as slim as the Fabco MSV-2 at 5/8" wide, but it gets mounted down in the frame. Some people have been using the Clippard SMAV-3 instead of the Fabco MSV-2. The PAVO-3 is an air actuated version of the similar MAVO-3. The problem for pneumatic assist builds that some markers use cylinders with a ports for advance and return (no spring), and a Fabco MSV-2 won't work for this. There are no similar small 4-way valves though. You could add a spring onto an autococker '3-way' valve (its called a 3-way but its really a 4/5-way), but I've been seeing builds where people end up using much larger MAV-4:

http://www.clippard.com/part/MAV-4

This also doesn't have the light pull of the MSV-2.

Okay, so keep the MSV-2, add on the PAVO-3 and actuate it from the MSV-2's output. When the normally closed MSV-2 is 'off' it vents its output to the cylinder AND the pilot for the PAVO-3. The PAVO-3 is an N.O. valve though so it turns its output on to retract the cylinder while the Fabco is 'off'. When the MSV-2 is turned 'on' (trigger gets pulled), then its output sends air to extend the cylinder but also to the pilot actuator on the PAVO-3, causing it to turn 'off' and vent the air on the 'retract' side of the cylinder.

Yeah, this isn't needed for rams like the MPA-3.

[knownothingmags]

http://www.clippard.com/static/image...051f9d-900.jpg

This isn't needed for the MPA-3 since it is a single-acting (air advance, spring return style) cylinder. This is for running rams/cylinders that have an air port for advancing and returning. Actually, in the above diagram, I have the cylinder reversed to that it will retract when the trigger is pulled and activates the MSV-2. Oops! Most people will want to plumb that cylinder in reverse! My bad! Lets pretend that I drew that diagram with the ports flipped for this explaination:

The PAVO-3 isn't quite as slim as the Fabco MSV-2 at 5/8" wide, but it gets mounted down in the frame. Some people have been using the Clippard SMAV-3 instead of the Fabco MSV-2. The PAVO-3 is an air actuated version of the similar MAVO-3. The problem for pneumatic assist builds that some markers use cylinders with a ports for advance and return (no spring), and a Fabco MSV-2 won't work for this. There are no similar small 4-way valves though. You could add a spring onto an autococker '3-way' valve (its called a 3-way but its really a 4/5-way), but I've been seeing builds where people end up using much larger MAV-4:

http://www.clippard.com/part/MAV-4

This also doesn't have the light pull of the MSV-2.

Okay, so keep the MSV-2, add on the PAVO-3 and actuate it from the MSV-2's output. When the normally closed MSV-2 is 'off' it vents its output to the cylinder AND the pilot for the PAVO-3. The PAVO-3 is an N.O. valve though so it turns its output on to retract the cylinder while the Fabco is 'off'. When the MSV-2 is turned 'on' (trigger gets pulled), then its output sends air to extend the cylinder but also to the pilot actuator on the PAVO-3, causing it to turn 'off' and vent the air on the 'retract' side of the cylinder.

Yeah, this isn't needed for rams like the MPA-3.

Ok cool. it would be cool to see you set one up, ooh and shooting video would be cool.
proof of concept and and spacial consumption of a frame.