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20cm Fan/Ventilator


ATEX Certification IECEX Certification

Zones: 1 and 2

Ramfan™ is the world leading manufacturer of fans and ventilators for hazardous areas.

The VF-UB20xx is a hazardous area blower with a totally enclosed motor which is safe for use in a variety of adverse atmospheres.

Super compact and lightweight, at up to 980 cfm (1,666 m3/hr) it delivers the highest airflow in its class.

Ideal for hazardous areas, it is tough, resistant to chemicals has anti-static housing and is supplied with a 7.6m long power cable.  It operates at an ultra-quiet level of 74dB at one metre.

The optional anti-static Quick-Couple™ Canister stores and protects duct from rips and tears and helps for a quick and easy set-up.  It is available with either a 4.6 or 7.6 metre duct.

 NSN Codes

4940-01-603-7098 - VF-UB20xx (230V)

Features & Benefits

  • ATEX and IECEx certified for use in Zone 1 & 2
  • Class leading air-flow at up to 980 cfm (1,666 m3/hr)
  • Ultra quiet - 74dB at 1 metre
  • Compact and lightweight - 12kg
  • Thermally protected cut-off switch
  • Durable, PC/ABS anti-static casing - weatherproof, dent resistant, v0 flame retardant and chemical resistant
  • Starter secured in flameproof motor enclosure to prevent risk of ignition when powered on
  • Extended reach power cable - 7.6 metres
  • IP55 water tight rain tested switch enclosure
Product Description

20cm VF-UB20xx Electric Hazardous Area Fan/Ventilator

Gas Zone: 1 and 2

Product Reference VF-UB20xx (115V) VF-UB20xx (230V)
Product Description 20cm Hazardous Area Fan / Ventilator 

II 2 G Ex db eb IIB T6 Gb

II 2 G Ex h IIB T6 Gb

Type of Protection

'd' flameproof

'e' increased safety

'h' non-electrical equipment

Area of Class (Gas) Zones 1 and 2, Gas Groups IIA and IIB
Max Surface Temp (Gas) T6
Ambient Temp. (Gas) -20°C TO +40°C

DEMKO 09 ATEX 0926969X

IECEx UL 13.0062X


Anti-static Polycarbonate

ABS Alloy

Motor 0.33 Hp (0.25kW)
Voltage 115V, 50/60Hz 230V 50/60Hz

Amps (Start/run)

7A / 2.3A 7A / 1.2A


Free Air Through Duct

980 cfm (1,666m³/hr) 816 cfm (1,386m³/hr)

15'/4.6m /w one 90° turn:

789 cfm (1,341m³/hr) 659 cfm (1,120m³/hr)

15'/4.6m /w two 90° turn:

666 cfm (1,132m³/hr) 558 cfm (948m³/hr)

25'/7.6m /w one 90° turn:

722 cfm (1,227m³/hr) 603 cfm (1,025m³/hr)

25'/7.6m /w two 90° turn:

614 cfm (1,044m³/hr) 510 cfm (867m³/hr)

Ingress Protection


Dimensions (h/w/d)

35 x 35 x 39 cm



Duct Adapters



74db @ 1m

Product Dimensions

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Version: SL090 DF512 Issue 2

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