Technical Characteristics

The material basis of UDP 3620 consists of anorganic fibers and synthetic aramide fibers as well as mineral reinforcement materials, bonded by high quality NBR rubbers.

Due to this combination of raw materials, the following mateial characteristics are given:
-          very good resistance to high temperature
-          high mechanical strength
-          good chemical resistance
-          able to substitute It-C  

UDP 3620 is produced according to the calender process and is given a thin anti adhesive surface when produced. The chemical properties are not affected by this process. 

Applications

According to the properties of the materials being used, gaskets made of UDP 3620 should be prefered wherever occuring temperatures exceed those covered by the application range of Centellen^® WS 3820. 

Chemical resistance

Resistant to:
-          hydrocarbons such as oils or solvents,
-          alcohols, glycols, aqueous solutions, water and steam up to 250°C
-          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:
BAM:       for gaseous oxygen up to 60°C and 130 bar (Tg-No. 4-4387/94)
KTW:        for drinking water according to the KTW recommendations of the BGA, for D2 seals  

Applications depending on pressure and temperature

standard version
incolored-blue
anti-adhesive coating OBFB
delivery formats        1000 x 1500 mm
                                1500 x 1500 mm                                                                 1500 x 3000 mm                                                            others on demand                              thickness 0,3 up to 6 mm

technical data
density                              1,85g/cm³-> DIN 28090 Part 2       Cold heading value (KSW) 5,5%        -> DIN 28090 Part 2 Cold resilience value (KRW)2,8%        -> DIN 28090 Part 2 Warm setting value (WSW) 6,7%        -> DIN 28090 Part 2 Warm resilience value (WRW)  1,6%   -> 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                                        2,0 cm³/min     -> DIN 3535/6 compressive strength (16h/175°C, sdE/16) 37 N/mm²                                                                      -> DIN 52913 compressive strength (16h/300°C)           35 N/mm²                                                           -> DIN 52913
tensile strength transverse    11 N/mm²->  DIN52910          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 occur simultaneously !