How the VA-ZD works.
A perforated cylinder whose internal damper sets the direction steplessly, from slightly upward for cooling to straight down for heating.
Applications: production and work areas; foundries, press shops, machining (p. 4–5). The data sheet shows Tijl, Zwolle (p. 4).
Krantz, Circular displacement outlet with adjustable damper VA-ZD, DS 4059 E 04.2018.
Smoke test
Airflow in the Krantz lab.
A real smoke test in the Krantz flow laboratory: this is how air leaves the VA-ZD.
Technical data VA-ZD
- Discharge height
- aanbevolen ca. 3 mp. 3
- Max. ΔT cooling
- above the occupied zone max. ±10 Kp. 11
- Volume flow
- 194/700 – 10,000 m³/h when installedp. 2
Krantz, Circular displacement outlet with adjustable damper VA-ZD, DS 4059 E 04.2018.
Page numbers are PDF pages of the data sheet.
Download documents
Air
| Property | Value · Source |
|---|---|
| Volume flow | 194/700 – 10,000 m³/h when installed at 3 m; on the floor 500 – 7,000 m³/h p. 2 |
| Max. ΔT cooling | above the occupied zone max. ±10 K; on the floor min. supply temperature 18 °C p. 11 |
| Max. ΔT heating | above the occupied zone max. ±10 K; on the floor max. +10 K p. 11 |
| Discharge height | aanbevolen ca. 3 m (onderkant rooster) of op de vloer / sokkel max. 0.5 m p. 3 |
| Penetration depth / throw | primary penetration depth up to approx. 14 m, maximum supply depth approx. 20 m; on the floor L1max approx. 10 m (DN 250) to 25 m (DN 630), −30 % at > 120 W/m² p. 11 |
| Example sound and pressure drop | example 3 m, DN 450, 4,500 m³/h: 63 dB(A), 110 Pa; floor DN 450, 3,510 m³/h: 62 dB(A), 90 Pa p. 6 |
| Contaminant load factor | at 3 m: 55 – 57 % (mixing ventilation 90 – 100 %); on the floor approx. 20 %; heat load factor approx. 65 % and 45 % respectively p. 2 |
Design
| Property | Value · Source |
|---|---|
| Sizes | DN 250/315/355/450/560/630; Ø DA 249 – 629 mm; L 900/1,100 mm; weight 10 – 21 kg p. 2 |
| Materials and finish | galvanised sheet steel; visible parts optionally RAL (9006 semi-matt); stainless steel on request p. 12 |
| Connections | for ducts to EN 1506 p. 11 |
| Options and versions | adjustment via Bowden cable, chain pull, lever, Belimo actuator 0 – 10 V (LM24A-SR) or thermal controller TS (supply temp.) / TD (temperature difference); volume flow damper; wall or L-bracket fixing p. 12 |
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