Double eccentric rubber lined butterfly valve
ProKla DOB-Ex RL rubber lined Butterfly Valve, double eccentric disc design, with EPDM ebonited lining, is applied in the sewage industry, sea water treatment and desalination projects.
Design standard: BS EN593
Face to face length : EN558-1/ISO5752 series 14 (DIN3202 F4)/ ISO5752 series 13
Flange dimension and drilling : BS EN1092/BS4504 (DIN2501)
Size: DN150 - DN3600; 6"-144"
Pressure rating:PN6- PN10-PN16-PN25-PN40
Application: water, sewage, sea water desalinization etc.
Flange and drilling to EN1092-2, face to face as per ISO5752 series 14 or Series 13
Disc is fully vulcanized with natural hard rubber, Streamlined low profile disc ensures the lower flow resistance.
3. Disc seal ring,
L profiled disc seal ring fixed by retainer ensures the reliable sealing performance in both direction, which is also easy to be adjusted or replaced without any special tools.
Body is fully vulcanized with natural hard rubber.
5. Shaft seal ring
Multiple shaft O rings provide long life and reliable sealing performance, which is easy to be adjusted or replace.
Dry shaft design can prevent the corrosion from service medium
7. Gear box
Low torque gearbox can be easily operated by hand wheel or connect with actuator
8. Top flange
Gearbox is equipped with ISO 5210 flange connection with actuator, and F10 is standard specified.