VT20-3 3-Stage Coaxial Venturi Vacuum Cartridge
The Vacuforce VT20-3 is a 3-stage coaxial Venturi vacuum cartridge, supplied as an internal vacuum-generating component for compatible generator assemblies or purpose-built OEM machinery. Its published maximum vacuum flow is 12.5 CFM (355 NL/min). It is a cartridge, not a complete generator with its own external connection housing.
Technical Specifications
| Specification | Details |
|---|---|
| Cartridge Model | VT20-3 |
| Component Type | Replacement / OEM coaxial Venturi cartridge |
| Venturi Stages | 3 stages within a single cartridge |
| Maximum Vacuum Flow | 12.5 CFM (355 NL/min) |
| Application | Matching multi-stage generator housings or verified OEM cartridge installations |
| Connection Ports | Provided by the compatible host generator or OEM manifold |
| Mounting and Seals | Confirm against installed assembly before ordering |
What the Coaxial Cartridge Does
In a coaxial Venturi cartridge, motive compressed air passes through internal nozzle stages and entrains air from the connected vacuum circuit. The 3-stage design is contained within one removable cartridge; it does not indicate the number of cartridges fitted in a generator.
A complete generator may combine several cartridges in a common housing to provide higher total vacuum flow. The finished generator determines port sizes, exhaust arrangement, cartridge quantity and overall vacuum performance.
Where It Is Used
Typical applications include replacement of a matching internal Venturi element in vacuum generators, OEM vacuum modules built into packaging machinery, automated handling equipment and centrally supplied vacuum manifolds.
The rated 12.5 CFM (355 NL/min) describes this cartridge family under its published test conditions. When specifying a complete system, also check the assembled generator’s maximum vacuum, compressed-air consumption, operating pressure and flow-versus-vacuum curve.
Compatibility and Maintenance
Do not select a replacement cartridge from flow rating alone. Confirm its exact series, length, body profile, sealing surfaces and any cartridge retention features against the original generator. Similar-looking coaxial cartridges are not necessarily interchangeable.
Before replacement, isolate and depressurize the compressed-air supply and release stored vacuum. Check the silencer, seals and contamination in the cartridge cavity during maintenance.
Frequently Asked Questions
Is the VT20-3 a complete vacuum generator?
No. It is an internal coaxial Venturi cartridge. A compatible housing or engineered OEM manifold is required to connect compressed air, vacuum and exhaust.
What does 3-stage mean?
The 3 stages are inside one cartridge. It does not mean that 3 separate cartridges are supplied.
How much vacuum flow is the cartridge rated for?
The listed maximum flow is 12.5 CFM (355 NL/min). Actual performance in a finished generator also depends on the housing, supply pressure, exhaust restriction and system leakage.
Will it fit any VTM or HGS vacuum generator?
Not automatically. Confirm the exact cartridge model and the host generator’s compatibility, physical dimensions and seals. Do not assume the VT18, VT19 and VT20 versions interchange.
Does the cartridge rating tell me compressed-air consumption?
No. Vacuum flow and compressed-air consumption are different measurements. Use the performance information for the fully assembled generator at its specified operating pressure.
Can a machine builder use it in a custom vacuum ejector?
Yes, when designed into a compatible manifold with correct air routing, mounting, exhaust management and a verified control circuit.
Does a multi-stage cartridge automatically include a non-return valve?
No. Stage count does not establish NRV provision. Check the exact cartridge and complete generator configuration before specifying vacuum retention.
How is a worn or blocked cartridge serviced?
Isolate compressed air, release vacuum, follow the host generator service process, inspect seals and exhaust restrictions, and install the specified replacement cartridge.
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