ATEX Controllers

Control of solids

VN-TT ATEX

Intended use:

Model with proccess connection Tube-Tube. The models are certificated for use in potentially explosive Dust and Gas atmospheres as well as in hybride mixtures (Dust + Gas) hazardous areas.

The pneumatic pinch valves VN with the elastic hose are to be used to control the transport or distribution for dusty and powdery, granulated and grainy bulk goods or viscous or liquid products. 


Function:

Inside the valves there is an elastic hose made of Natural gummy that is squeezed either by compressed air or by water pressure. The existing solids are encolsed due to this compression and when there is no pressure in the valve, the hose opens and returns to the original shape allowing the flow of product.

There are models with diameters from 13 to 125 mm and with many different proccess connections like flange-flange, racor-racor, tube-tube or combinations of them and with the hose made of NRE. 

Mechanical connection:

The mounting of these models is made by insterting the valve between a pipe with the tube connections. 

Dimensions:

Aproximate measures are given in mm. 

 

 

 

Technical data:

Name Pneumatic pinch valve  
Type QV-A-... ref: 2900-A-...
Certifications    
B6 Gas+Dust ATEX II 2/2G IIB T X  
  ATEX II 2/2D T X  
B11 Gas+Dust ATEX 1/2G IIB T X  
  ATEX II 1/2D T X  
B22 Gas+Dust ATEX II 1/1G IIB T X  
  ATEX II 1/1D T X  
Maximum product temperature +80ºC  
Ambient temperature -20 °C ... +80 °C  
Procces pressure    
DN13 and DN20 +6 bar  
DN25 ... DN125 +4 bar
(Under request higher pressures)
 
Control pressure +2.5 bar over the proccess pressure  
Difference in pressure +2.5  
Weight 0.27 kg depending on the model  
Materials:    
Housing    
DN13 ... DN25 Aluminium, Stainless Steel 1.4571 or POM  
DN32 ... DN125 Aluminium, Stainless Steel 1.4571  
Proccess connection    
DN13 ... DN25 Aluminium, Stainless Steel 1.4571 or POM  
DN32 ... DN125 Aluminium, Stainless Steel 1.4571  
Elastic hose Natural gummy resistent to abrasion (NRE)