
STEL Series
1000ML-STEL
1 L stainless steel pressure vessel with electric agitator
- Max pressure
- 0–6.9 bar

STEL · STAG · CTEL Series
Electric or pneumatic agitation, 1–95 L, up to 6.9 bar.
SR-TEK agitated pressure vessels keep fluids homogeneous while they are dispensed. A stainless steel shaft and mixing propeller turn inside the pressurised vessel, driven by an electric motor (STEL and CTEL) or an air motor (STAG), so the material leaving the outlet stays consistent.
Agitated vessel range

STEL Series
1 L stainless steel pressure vessel with electric agitator

STEL Series
2 L stainless steel pressure vessel with electric agitator

STEL Series
5 L stainless steel pressure vessel with electric agitator

STEL Series
10 L stainless steel pressure vessel with electric agitator

STEL Series
25 L stainless steel pressure vessel with electric agitator

STEL Series
50 L stainless steel pressure vessel with electric agitator

STEL Series
95 L stainless steel pressure vessel with electric agitator

STAG Series
1 L stainless steel pressure vessel with pneumatic agitator

STAG Series
2 L stainless steel pressure vessel with pneumatic agitator

STAG Series
5 L stainless steel pressure vessel with pneumatic agitator

STAG Series
10 L stainless steel pressure vessel with pneumatic agitator

STAG Series
25 L stainless steel pressure vessel with pneumatic agitator

CTEL Series
2 L transparent pressure vessel with electric agitator

CTEL Series
5 L transparent pressure vessel with electric agitator

CTEL Series
10 L transparent pressure vessel with electric agitator
STEL vs STAG vs CTEL
Choose the series by drive and visibility. All three are pressurised vessels with a stainless steel shaft and mixing propeller, and alternative mixing elements are available on every model.
Mixing vs agitation
Both blend substances, but they differ in mechanism and objective. SR-TEK agitated vessels cover both — a low speed for a gentle stir, a high one for fast agitation.

Mixing

Agitation
Certified quality
Technical data
| Available capacities | STEL 1 / 2 / 5 / 10 / 25 / 50 / 95 L · STAG 1 / 2 / 5 / 10 / 25 L · CTEL 2 / 5 / 10 L |
|---|---|
| Max working pressure | 6.9 bar (STEL, STAG; 50 L STEL: 4 bar) · 4 bar (CTEL) |
| Wetted parts | 303/304 stainless steel; CTEL: 303 stainless steel with acrylic or toughened glass cylinder |
| Drive | Electric motor with controller (STEL, CTEL) or air motor (STAG) |
| Mixer | Stainless steel shaft and propeller |
| Design code | ASME Section VIII Div. 1; PED 2014/68/EU Art. 4.3, group 2 liquids |
| Options | Three-blade, four-blade or anchor propellers; filter regulator (STAG); level sensor (CTEL) |
Agitated pressure vessel FAQ
The drive. Electric agitators (STEL and CTEL) use an electric motor with a controller, which gives fine, repeatable speed control. Pneumatic agitators (STAG) use an air motor driven from your compressed-air supply, with a throttle to set the speed and a filter regulator available for the air line. Both turn a stainless steel shaft and propeller inside the pressurised vessel.
Because many fluids do not stay uniform on their own. Blended components can separate or settle while a vessel sits under pressure between shots, so the material at the outlet slowly drifts from its specification. Agitating during dispensing keeps the fluid homogeneous and every shot consistent.
Mixing gently combines components into a uniform distribution, usually by slow stirring that avoids excessive shear — the right choice for delicate materials. Agitation uses impellers or blades to create turbulence and shear, which speeds up dispersion, heat transfer or reactions and breaks up clumps. The choice depends on the fluid's viscosity, its sensitivity to shear and how quickly it needs to be homogeneous.
Yes. The CTEL Series combines a clear acrylic or toughened glass cylinder with an electric agitator, in 2, 5 and 10 litre sizes rated to 4 bar, so you can watch the fluid being mixed while it is pressurised and dispensed.

Need technical advice?
Tell us your fluid, its viscosity, the capacity and pressure you need, and whether you prefer an electric or an air drive.
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