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Q-Flap NX II

Effectively isolated.



In the event of an explosion, the Q-Flap NX II explosion isolation flap valve effectively isolates plant components in almost all industrial sectors. In order to meet the highly diverse requirements for the individual industries, the Q-Flap NX II product range offers three different design versions. The nominal pipe sizes up to DN 710 feature an inspection flap, and the larger nominal pipe sizes have a modular design. This ensures that maintenance and servicing of any pipe size can be carried out easily.
The Q-Flap NX II is also perfectly suited, for the aspiration lines of filtering dust collectors, and for the suction intake lines of mills. The nominal pipe sizes up to DN 400 are primarily used for decentralized extraction systems in the pharmaceutical and chemical industries, whereas nominal pipe sizes between DN 450 and DN 710 are also used for centralized dust extractors in the grain and food industry. Nominal pipe sizes from DN 800 to DN 1000 are used in the wood and heavy industry.
REMBE® Q-Flap RX™ with Accessoires

Spare parts set

  • Quick maintenance without the need for a complete dismantling of the device, simply by completely opening the inspection cover.
  • Optionally: longer maintenance intervals by integrating a supervision function.
  • No boundaries: Q-Flap NX II available up to DN 1250 and can be installed in any orientation, in push or pull flow with up to 3 elbows.
During normal operation the aerodynamic flap blade is held open at an incline with internal rare-earth magnets. In the event of an explosion the advancing pressure wave causes the flap to release, pivot closed and lock. This seals off the upstream area from a propagating fireball and explosion pressure effects.
Technical data
Product parameters
With swith/without switch (please indicate on order)**, Steel/stainless steel (please indicate on order)
According to EU guideline 2014/34/EU (ATEX 114) and NFPA 69***
Mounting position*
Horizontal, suction side (fan after flap "pull flow")
Operating air flow velocity
12 to 35 m/s
Ambient temperature: -4 °F up to +176 °F (without switch max. +212 °F), Process temperature: 33,8 °F up to +176 °F (without switch max. +212 °C)
Housing: steel/stainless steel**, flap blade: stainless steel, sealing: EPDM/silicone, PTFE
Connection flange
DIN 24154 part 2
Raw gas dust concentration
max. 100 g/m³
* Our specialists will gladly consult you personally in case of deviating operating conditions.
** On request.
*** Optional.
Applications + Industries
  • animal feed productions
  • aspiration plants
  • brewery
  • chemical- petrochemical
  • filters
  • food
  • food production
  • mills and grinding plants
  • mixers
  • recycling
  • wood processing


Certified in
accordance with

EN 16447
ATEX EC type examination certificate no. GEX 19 ATEX 1004X (DN 140 to 1000)

ATEX EC type
examination certificate no. GEX 19 ATEX 1004X (DN 140 to 1000)

Meets the requirements of NFPA 69

Meets the requirements of NFPA 68

The Q-Flap NX™ II ensures reliable explosion isolation to protect your plant and minimize the effects of an explosion.

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Scan the QR code with your iOS camera* to see an AR preview of the product.
Q Flap NX II AR Viewer Ru
The dimensions shown may differ from those of the actual product.
* Requires iOS 13, iPadOS 13, ARCore 1.9 or higher.
Any Questions?
We would be happy to show you solutions tailored to your process that limit the effects of an explosion to a harmless level and ensure that production can be resumed quickly after an explosion event.
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