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Tech index -> AirStar Nova -> Nova 700 tech

The Nova 700 was the original Nova model to be produced and sold. It featured the articulating barrel, right-feed only design, integrated regulator in the rear of the body, and an integrated three-way trigger valve.

Nova700 o-rings:
Spool valve (5 o-rings):
Main dump chamber seal o-ring (o-ring on long end of spool): 108/70
Dump chamber input o-rings (two, o-rings that surround spool's ports):
Front: 109/90
Rear: 12/70
Spool sail (largest dia o-ring): 115/70
Spool input seal (rear o-ring on spool): 12/70

Spool valve housing (5 spool o-rings):
Outside o-rings (3): 222/70
Spool endcap seal: 117/70

Reg piston o-ring: 114/70
Breech housing outside o-rings (2): 222/70

Disassembly:
The first step in disassembly is to remove the barrel. This is accomplished by twisting it counter-clockwise (when looking at the front of the marker) and pulling it straight out. Two o-rings seal it with the body and breech so be gentle with it as to avoid scratching the surfaces. The barrel itself moves back and forth during the firing cycle so it has its own set of o-rings and bumpers.

To remove the frame you will have to disassemble the trigger valve section. The first step in this is to unscrew the long threaded screw holding the bottomline to the frame, which also holds the frame to the rail mount.

Once it's off you can remove the mount if you wish, it's not required though.

If you have a foregrip installed like I do, remove its mount as well.

Now you must remove the trigger assembly. Located diagonally in the top of the trigger is a set screw which holds it to a rod running through the housing above. When you loosen this set screw the trigger will come loose, and the rod it attaches to can be removed out the front. This screw accepted a 1/16" allen wrench on my model.

Now you must remove the set screw located behind the trigger slot, to allow you to access the trigger valve. There are two set screws located in the same threaded hole, so be sure to remove both.
Once the screws are out, use a pick to pull the spring back, visible in the rear hole on the end of the rail. Once it's far enough forward you can remove the rear screw holding it to the body. Also remove the front screw which is accessible at any time. I don't have pictures of this yet but the trigger valve internals slide out the front of the rail/housing.
The rail/housing comes off the body and looks something like this. There are three o-rings recessed into the top which seal against the body.

Regulator:
The rear section of the body is an integrated pressure regulator and should be removed to access the firing assembly. To release it, remove the siterail from the rear of the body as well.
You can disassemble the regulator if you wish, and that is described here. First, remove the c-clip visible at the back of the reg body.

Once the c-clip is gone, the majority of the reg's internals will fall out. They are arranged like this:

Now, use a flathead screwdriver to remove the reg base seat, located down in the reg body.

Once it disengages, the seat will come out. Under it is the regulator base seal with a spring attached, let these parts join the others you have.

This is a type of floating-poppet regulator, pretty small in size yet high-enough flowing to feed many cycles per second. Screw the adjustment in for more pressure, or out for less.

If you pull the reg body out from the back of the body, it will look like this:

The alternative is to push it forward through the body and push the firing assembly out as well (for that, read the below firing assembly section).

Firing Assembly:
To disassemble the body, you'll have to push the components out the front or rear. The regulator housing has to come out first if you're to remove them from the rear (read the above regulator section), otherwise you can push everything out the front (reg included). For this I describe things in terms of the regulator already removed.

When the rail/housing is removed, the only thing left holding the breech section inside the body is the feedneck. Unscrew it or you won't be able to budge the breech any direction.
With the feedneck removed, you'll be able to fully disassemble the body. The firing assembly has two housing components, the breech itself and the spool housing. You can push the spool housing out the front by inserting a tool through the rear of the body where the regulator was located. Be sure to choose something non-metallic so you don't scratch the inside surface of the body. When pushing forward, it's likely that all of the assembly will get pushed out. Be sure to avoid tearing the o-rings on the front milling of the body (feendeck and barrel retainers)
The alternative is to push the pieces out the rear of the body. This can be more tricky since the spool valve will come apart and release it and the spool endcap piece, but might be easier to do without damaging parts.
Either way, with the firing assembly removed, it will look something like this.

The brass ring is used to space out the dump chamber, between the breech in front and the spool housing in rear.

Disassembled, the firing assembly is as follows:

Above is the breech section, brass spacer, spool housing, spool, and spool endcap (or housing endcap). The SuperNova valve is a little different than this; the spool valve o-rings are in different places.