Universal sealing sheet with extremely high temperature and pressure resistance (DIN 28091FA-MA 1Z-0)

Technical charakteristics

The material basis of  Europil® WS 3640 is comprised of anorganic fibers as well as mineral reinforcement materials, bonded with high quality NBR rubbers.  

As a result, the following meterial profile is achieved:
-          high temperature resistance
-          high degree of mechanical stability
-          very good gas tightness at high temperatures
-          good chemical resistance

Production of Europil® WS 3640 is based on calendering process, during which the product is given an anti-adhesive surface with an extremely low coating thickness. The chemical properties remain unchanged thereby.

Applications

Due to this properties, Europil® WS 3640 seals can be employed in situations in which asbestos seals (in particular the former Hecker® quality Europil® WS 3440) were previously needed.

Of particular interest is the improved leakage rate of Europil® WS 3640 over asbestos seals when prevailing conditions involve up to 100 bar and 300°C. (Specific leakage rate according to DIN 28090 part 2. [l < 0,1 mg/s(s*m)].

Chemical resistance

Resistant to
-          hydrocarbons such as oil or solvents,
-          alcohols, glycols, aqueous solutions, water and steam
-          weak alkaline solutions and organic acids.
Partially resistant to
-          ketones and esters,
-          chlorinated solvents
-          strong alkaline solutions and anorganic acids
Not resistant to
-       hydrofluoric acid and concentrated nitric acid.

 Releases applied for:

BAM:       gaseous oxygen (TG-No. 7967/95 2-39008)
KTW:        for drinking water according to the KTW        recommendations of the BGA, for D2 seals

 

Applications depending on pressure and temperature

Standard version
                Black-white
                Anti – adhesive coating OBSW
                Delivery formats       1000 x 1500 mm
                                                1500 x 1500 mm
                                                1500 x 3000 mm
                                                other dimensions on inquiry
               Thickness from 0,3 up to 6 mm

Technical data
Density                                   1,85g/cm³DIN 28090 part 2
Cold heading value (KSW)      6,0%        DIN 28090 part 2
Cold resiliences value (KRW)   3,1%        DIN 28090 part 2
Warm setting value (WSW)      6,5%        DIN 28090 part 2
Warm resilience value (WRW)  1,2%        DIN 28090 part 2
Spec. leakage rate l      0,05 mg/s*m      DIN 28090 part 2
Gas-tightness               0,50 cm³/min     DIN 3754                                       0,9 cm³/min       DIN 3535/6
compressive strength(16h/175°C,sdE/16)
34 N/mm²                                               DIN 52913
compressive strength (16h/300°C)                                                  34 N/mm²                                               DIN 52913
tensile strength transverse        10 N/mm² DIN 52910
Min. surface pressure (gas) smin              30 N/mm²                                                                                    DIN 28090
Min. surface pressure (fluids) smin           20 N/mm²                                                                                   DIN 28090
Max. surface pressure sBo(23°C)              > 90 N/mm²                                                                                     DIN 28090  
Max. surface pressure sBo(200°C)            > 90 N/mm²                                                                               DIN 28090  
Max. surface pressure sBo(250°C)            > 90 N/mm²                                                                         DIN 28090  
Min. temperature                                     -200°C
Max. temperature                                    300°C
Max. temperature (temporary)                  500°C
Max. pressure                                          150 bar 

Constant maximum temperature and maximum pressure should not occure simultaneously !