Air principle
From outlet to occupied zone.
At the outlet
A perforated cylinder with a conical neck lets the air out with low turbulence. (DS 4011 E p. 3)
In the room
For cooling the air sinks gently to the floor; one outlet covers a radius of approx. 3 – 5 m. For heating an actuator opens the core tube and the annular gap, and a supporting jet pushes the warm air down. (DS 4011 E p. 2–4)
Construction
A circular housing with spigot, the perforated cylinder with conical neck, a core tube with rounded inlet, and damper discs coupled to the annular seal. An electric actuator drives the assembly. (DS 4011 E p. 2)
Smoke test
Airflow in the Krantz lab.
A real smoke test in the Krantz flow laboratory: this is how air leaves the VA-K.
Technical data VA-K
- Discharge height
- 6 – 30 mp. 6
- Max. ΔT cooling
- −5 Kp. 3
- Volume flow
- 1 000 – 10 000 m³/hp. 7
Krantz Components, Conical displacement outlet VA-K, DS 4011 E 07.2014/1.
Page numbers are PDF pages of the data sheet.
Download documents
Air
| Property | Value · Source |
|---|---|
| Air distribution | displacement, low turbulence; supporting jets via core tube and annular gap for heating DS 4011 E p. 3 |
| Volume flow | 1 000 – 10 000 m³/h p. 7 |
| Nominal volume flow | DN 630: 2 500 m³/h · DN 800: 10 000 m³/h p. 7 |
| Max. ΔT cooling | −5 K (supply – extract) p. 3 |
| Max. ΔT heating | +8 K; short warm-up up to +10 K p. 3 |
| Discharge height | 6 – 30 m; DN 630 approx. 6 – 18 m, DN 800 approx. 8 – 28 m p. 6 (p. 2: up to 30 m) |
| Coverage | coverage radius approx. 3 – 5 m per outlet; centre spacing approx. 5 – 9 m p. 4 |
| Sound and pressure drop | in charts per size, for cooling, heating and isothermal mode p. 7 |
Design
| Property | Value · Source |
|---|---|
| Sizes | DN 630 · DN 800; outer diameter 1 060 / 1 625 mm; height 720 / 1 250 mm; approx. 96 / 220 kg table 1, p. 2 |
| Material | galvanised sheet steel; visible parts RAL 9010 or other RAL p. 7 |
| Connection | spigot; circular flange on request p. 2 |
| Actuator | built-in, electric, 0 – 10 V; damper disc stroke 0 – 100 mm (DN 630) or 0 – 120 mm (DN 800) p. 7 |
Versions and sizes
Two sizes, for 6 to 30 m.
- DN 630
- DN 800
DS 4011 E p. 2
Finish
visible parts RAL 9010 pure white or another RAL colour (p. 7)
Installation
flush with the ceiling or free-hanging, in very high halls (DS 4011 E p. 2)
Applications
Where it belongs.
Aircraft paint booths and hangars (26 m high) and sports halls such as ice rinks, there combined with the swivel jet outlet SW (DS 1249 E) (DS 4011 E p. 2). The data sheet lists as Krantz references the paint hangars of Aircraft Services Lemwerder and Deutsche Airbus Hamburg (p. 9).
When not: Below 6 m discharge height the VA-PV fits (4 – 8 m, DS 4061 E p. 2) or the VA-ZD (approx. 3 m or at floor level, DS 4059 E p. 3).
Related in the collection
Same family, a different character.
| Type | What it is | Essence | Source |
|---|---|---|---|
| VA-PV | Radial displacement outlet | vertically down from 4 – 8 m; supporting jet for heating | DS 4061 E p. 2–3 |
| VA-ZD | Circular displacement outlet with adjustable damper | approx. 3 m above the floor or at floor level; supply depth approx. 20 m | DS 4059 E p. 3, p. 11 |
| DD-VG | Twist outlet with jet straightener | mixing instead of displacement; 3 – 28 m | DS 4033 E p. 2 |
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