Chem-Set 160-840 Static Mixer Nozzle, 40 Element Bell Inlet

The Chem-Set 160-840 static mixer is a 40 element disposable spiral mixer with a bell inlet, built for 200, 400, and 600 cc dual cartridges and for meter mix machines. The bell inlet is the part that matters on a machine. It seats against the manifold face and ports the A and B sides separately into the mixer instead of letting them meet inside the manifold, which is where material gels up and plugs the block. Cleanup is pulling the mixer and wiping the face. It is an alternative to the Nordson 7700932.

Key Product Details

Performance in Production

• The 40 element spiral runs in a 0.366 in bore, which is the long mixer in this diameter family. Use it when the material is viscous, the ratio is off 1:1, or a shorter mixer has given you streaking.
• The element is a tight fit inside the polypropylene casing, which is what keeps material from slipping past the element instead of through it.
• Designed around 1:1 and 2:1 ratios. Those cover most two part epoxy, urethane, silicone, and methacrylate systems running on a bell mount manifold.
• Bell housing keeps the mix point inside the disposable part. The expensive manifold stays clean and the mixer is the consumable.
• Changeover is mechanical, not chemical. Pull, wipe, replace. No solvent flush of the block between runs.
• At 14.14 in the mixer holds a meaningful volume of material, so purge and check the ratio at startup before you dispense onto a part.

Common Applications

• Meter mix dispensing of two part epoxy, urethane, silicone, and methacrylate
• Production assembly lines running bulk adhesive through a valve or manifold
• Potting and encapsulating operations
• Carbon fiber and composite layup meter mix equipment
• Concrete repair and structural injection
• 200, 400, and 600 cc dual cartridge dispensing with a bell mount gun

Available Sizes

• Chem-Set 160-840 Static Mixer Nozzle, sold each, SKU CCX-160-840

Cross-Reference and Alternative Part Numbers

The Chem-Set 160-840 is an alternative to the Nordson 7700932, also sold as the TAH 160-840. Same 40 element spiral construction, same bell housing inlet and stepped outlet, and built for the same 200, 400, and 600 cc cartridges and meter mix manifolds. We stock the Nordson branded part as well if your process is specified to it: Nordson 7700932 | TAH 160-840 Static Mixing Nozzle.

Test the mixer in your process before committing a production run to it.

Related Products

• Chem-Set 161-224 Static Mixer, 24 element, 0.5 in bore bell inlet mixer
• Nordson 7700932 | TAH 160-840 Static Mixing Nozzle
• All static mixers, dispensers, and nozzles

How a Bell Inlet Static Mixer Works on a Meter Mix Machine

A static mixer has no moving parts. It mixes by forcing material through a fixed spiral element that splits the stream and folds it back together over and over as it travels down the bore. On a meter mix machine the mixer is the last thing the adhesive touches before it hits the part, so if it bypasses or plugs, you find out in the bond line.

• The machine proportions the A and B sides and feeds them to the valve or manifold block.
• The bell housing seats flat against the manifold face. A and B enter the mixer through separate ports, so the two sides do not meet upstream inside the manifold.
• A retaining nut, 7/8-9 or 7/8-14 thread, clamps the mixer to the face and holds it there under dispensing pressure.
• Material runs the 40 element spiral. Each element divides the stream and recombines it, so a 40 element housing puts material through more division stages than an 18 or 24 element mixer in the same 0.366 in bore.
• The stepped outlet delivers the mixed material at 0.08 in. Step it down further with a dispensing tip when the bead needs to be finer.
• At shutdown or a material change, back off the nut, pull the mixer, wipe the manifold face, and install a fresh one. Nothing cures inside the block.

A metal jacket is recommended over the mixer any time working pressure inside the nozzle will exceed 150 psi (10 bar). That situation comes up on meter mix valves and manifolds, not on hand cartridge work. If you are running high viscosity material through a long mixer at production rates, assume you need the jacket and confirm your machine’s operating pressure before you run it bare.

Materials commonly run through this mixer include two part epoxies, polyurethanes, silicones, and methyl methacrylates.

Frequently Asked Questions

What is the Chem-Set 160-840 static mixer used for?

It mixes two part adhesive on meter mix machines and on 200, 400, and 600 cc dual cartridges. The 40 element spiral in a 0.366 in bore handles epoxy, polyurethane, silicone, and methyl methacrylate.

Is the Chem-Set 160-840 an alternative to the Nordson 7700932?

Yes. It is an alternative to the Nordson 7700932, also known as the TAH 160-840, built with the same 40 element spiral, bell housing inlet, and stepped outlet for the same cartridge sizes and meter mix manifolds. Nordson is the trademark owner of that part number. We carry the Nordson branded version too, so if your process paperwork calls it out by name you can order either one from us. Run a test before a production changeover.

What cartridge sizes does the 160-840 fit?

200, 400, and 600 cc dual cartridges with a bell mount, plus meter mix machine manifolds and valves. The bell housing connection is 0.657 in (16.7 mm) and it retains with a 7/8-9 or 7/8-14 nut.

What mix ratios does the 160-840 work with?

1:1 and 2:1. If you are running a ratio further off balance than that, call us before you order and we will point you at the right element count and bore for it.

Do I need a metal jacket with this mixer?

Use one if working pressure inside the nozzle will exceed 150 psi (10 bar). That applies to meter mix valves and manifolds rather than hand cartridge work. Check your machine’s operating pressure, and if you are near the line, jacket it.

What is a bell inlet static mixer?

It is a mixer with a flared bell shaped inlet that mounts flat to a manifold face or a large cartridge and takes the A and B sides in through separate ports. Bell mixer, bell mount mixer, bell housing mixer, spiral bell mixer, motionless mixer, and static mix nozzle all describe the same part. The point of the bell is to move the mix point out of the manifold and into the disposable nozzle.

Can the 160-840 be reused?

No. It is disposable and single use. The element is polyacetal inside a polypropylene casing, and once adhesive starts to set inside it there is no practical way to clear it. Plan consumption into the job rather than trying to stretch one mixer across runs.

Questions on fit for your meter mix setup? Call (800) 220-1966 or email [email protected].

Chem-Set is a Chemical Concepts brand. Nordson, TAH, and all referenced part numbers are trademarks of their respective owners. Part numbers are listed for identification and cross-reference only and do not imply endorsement, affiliation, or equivalence.