NOVEX II FILTER ISOLATION VALVE

Explosion Isolation Method

The explosion isolation method involves preventing flames from escaping outside the installation where an explosion occurred. In the absence of this type of protection, there is a risk that sparks or flames escaping could become effective sources of ignition for the surrounding explosive atmosphere.

Application

The NOVEx II series is a protection system consisting of a passive flame arrester for cutting off explosive dust and holds a certificate of compliance with harmonized standards EN16447:2014 and EN15089:2009. NOVEx II valves are used to prevent the spread of an explosion from dust filters to the inlet of polluted air and/or the outlet of clean air. In this case, the filter must be additionally protected with explosion panels or explosion suppression.

Key Information

• Certified for "Pull" or "Push" installation.
• Used to stop the explosion of dust in clean air ducts.
• Can be placed in both horizontal and vertical ducts.
• Variable pipe length (5 - 15 meters) between the filter and NOVEx II.
• Certified according to EN 16447 and EN 15089.
• Compliant with NFPA 69:2019 using required options.
• Housing made of painted steel (RAL3020), stainless steel AISI304, or 316L.
• Suitable for all types of dust (organic, inorganic, and metallic).
• Suitable for dust with very low Minimum Ignition Energy (MIE) (≥ 1 mJ).
• Pmax ≤ 9.2 bar.
• Kst up to a maximum of 305 bar*m/s.

Dimensions and Versions

ATEX-certified NOVEx II return valves are available in popular sizes from DN100 to DN1250 (DIN 24154/R2, T2).

Options: ANSI flanges, open and/or closed valve position detection, product sediment detection, automatic cleaning system, valve wear detection, pressure drop monitoring support ring, for vertical installation.

Characteristics

• Nominal Diameter
• Length
• Width
• Height
• Weight
• Pzred Max
• Min. Volume
• Max. Air Velocity

Pressure Drop

• Normal Flow
• Pressure Loss
• Air Flow

Order Code

• Product
• Description
• Nominal Diameter
• Painted Steel
• Position Sensor NXII AC P1
• Closure Sensor NXII AC B1
• Pollution Sensor NX AC DA
• Pulsation Cleaner
• Wear Sensor NX AC DD
• Ex Junction Box 2GD
• Sparkproof Barrier N0534A, dual-channel, PNP output

Unprotected System Challenges

In an unprotected system, it is not the first explosion that causes the most damage, but subsequent secondary explosions. Explosion suppression and explosion-resistant design solve a significant part of the problem, but in both cases, isolation still plays a crucial role. Several methods are available in the market to implement this idea.

Isolation Through Existing Process Elements

Various types of explosion isolation can be achieved by utilizing existing process elements such as rotary valves, roots blowers, screw conveyors, double valves (lock-type), or check valves.

Isolation Through Passive Elements

A wide range of passive elements is also offered, including flame arresters, quick-closing VENTEX valves, and explosion relief chimneys. These operate without external detection or control.

Isolation Through Active Elements

Several active systems also help prevent explosions, such as quick-closing gates, chemical barriers, fire dampers, and switching valves. All are operated by a detector above the control system.