Keystone OptiSeal Butterfly Valve
Keystone™ OptiSeal is a resilient seated butterfly valve for general purpose, food and beverage processing, industrial applications and chemical applications when configured with a PTFE lined seat, disc and stem.
Any questions?
Fredrik Ekeroth
Solution Seller
Phone. +46 54-57 92 06
Fredrik Malmström
Solution Seller
Phone. +46 40-33 02 33
Johan Riedenlow
Account Manager
Phone. +46 40-33 02 30
Anders Praem
Inside Sales Engineer
Phone. +45 2137 7759
Kenn Gerwien
Account Manager
Phone. +45 2346 5513
Slawka Pedersen
Inside Sales Manager
Phone. +45 2137 7702
Henna Ketoja
Inside Sales Engineer
Mob. +358 400 612 124
Tommi Penttilä
Sales Manager Conventional Power
Phone. +358 207 416 208
Mob. +358 40 512 2308
| Certifications | CUTR, SIL capable, PED |
| End Connection | Wafer, Lugged |
| Application | Winemaking, Beverages, Automotive, Air Circulation |
| Material | Super Duplex, Hastelloy, Epdm Rubber, Duplex, Cast Iron, Carbon Steel, Buna-N, 316L Stainless Steel, 316 Stainless Steel |
| Operating Temperature | Up to 250 F (120 C) |
| Pressure Class | PN |
| Process Connection Type | PN16 |
| Seat/Seal Type | Resilient |
| Shutoff Class | Zero Leakage |
| Valve Size | NPS 20 / DN 500, NPS 10 / DN 250, NPS 8 / DN 200, NPS 6 / DN 150, NPS 4 / DN 100, NPS 3 / DN 80, NPS 24 / DN 600, NPS 2-1/2 / DN 65, NPS 18 / DN 450, NPS 16 / DN 400, NPS 14 / DN 350, NPS 1-1/2 / DN 40 |
| Valve Size Standard | DN |
| Valve Type | Butterfly |
| Media | Liquids, Water, Hot Water, Liquid, Air |
| Stem | O-ring |
- Top bushing absorbs actuator side thrust loads.
- Actuator flange acc. ISO 5211.
- High solid, glossy, silicone free, paint system ensuring excellent corrosion resistance.
- Extended body neck allows pipe insulation.
- Body locating holes ease installation and centering between the flanges.
- Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and bubble-tight shut-off.
- The seat is field replaceable and fully isolates the body and stem from the flow.
- Primary stem sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.
- A secondary shaft sealing provides back‑up safety.
- No flange gaskets required.
- High Cv value.
- Top and bottom shaft bearings for optimized support and minimum friction in all body materials up to DN 300, except cast iron.
Visit us at:
Askalon AB, Nolgårdsvägen 11, SE-663 41 Hammarö, Sweden
Phone. +46 54-57 92 00, Email: sales@askalon.se
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