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Flamco Contraflex 50L - 1000L

Flamco Contraflex Expansion

Vessels 50L - 1000L

Flamco carries a wide range of expansion vessels, equipped with innovative technology. Both the steel shell and the membrane are made of top quality materials and guarantee a long service life. Expansion Vessels are for use in pressurised heating & cooling systems and permit the absorption of increases in volumes within the system due to temperature rises in the heating/cooling medium. The Contaflex expansion vessel comes in a range of sizes from 50 Litres through to 1000 Litres in capacity.

Features:

  • Deep Drawn Steel Shell
  • EPDM Diaphragm
  • Each Vessel is Factory Tested
  • Red Colour
  • Nitrogen Gas Pre-Charge
  • In Accordance with EN13831
  • CE Approved
   
Technical Data:  
   
Vessel Material: Deep Drawn Steel Shell
   
Diaphragm Material: EPDM (Non Replaceable)
   
Sizes: 8L, 12L, 18L, 25L & 35L 
   
Colour: Red (RAL3002)
   
Maximum Pressure: 6 bar
   
Pre-Charge Nitrogen Pressure: 1.5 bar
   
Maximum System Temperature: 120ºC
   
Diaphragm Temperature Range: -10 - 70ºC
   
Conforms To: EN 13831 & PED 2014/68/EU
   
Approvals: CE Approved

 

 

Which Vessel to Choose?

Note: Based on a total system volume (with a 3 bar safety valve)

- Formula 1:

Vu = Va x Vn
            100

Where:

- Vu = Useful Volume

- Va = Total Content of Installation

- Vn = Percentage of expansion dependant upon the average temperature. Co-efficient to be applied as a function of the average temperature:

a) 40°C = 0.77

b) 60°C = 1.20

c) 70°C = 2.26

d) 80°C = 2.96

e) 85°C = 3.21

f) 90°C = 3.59

g) 95°C = 3.94

- Formula 2:

n = (Final Pressure + Ata. Pressure) – (Factory Set Pressure + Ata. Pressure)
(Final Pressure + Ata. Pressure)

Where:

- n = Pressure Factor

- Ata. = Atmospheric Pressure (1bar)

- Formula 3:

Vt = Vu
         n

Where:

- Vt = Total Volume of Expansion Vessel

- Vu = Useful Volume (from formula no.1)

- N  = Pressure Factor (from formula no.2)

Example:

The total volume of the installation is 350 litres and has a static head of 10m. The average operating temperature is 80°C and the system is fitted with a 3 bar safety valve i.e. final pressure. Find a suitable Reflex Expansion Vessel?

1)   Vu = 350 x 2.96 = 10.36 litres
100

2)   Note: = Factory set Pressure is 1 bar

n = (3+1) – (1+1) = 0.5
(3+1)

3)   Vt = 10.361 = 20.72 litres
0.5

Solution:

From the catalogue we can see that a 25 litre normal type or a 24 litre flat type would be suitable for the system described above. For further details please contact our sales department.

Print Page Data Sheet

Flamco Data Sheet 50L - 80L

Flamco Data Sheet 100L - 1000L