GENERAL APPLICATIONS
CVB Butterfly Valves BFL series have excellent performance, easy maintenance and component interchangeability that provides reliability and serviceability.
Core Features
- Monobloc or two pieces body
- Seat with rigid ring
- Split shaft with low pressure drop
- Wide range of materials
Benefits of BFL Series
Monobloc body:
- Available for wafer, lug or flanged style
- To ensure maximum security and reliability
- Available with extended neck to enable piping insulation
- Wafer style body with shaped ring to ease valve installation and centering within the pipe flanges
Two pieces body:
- Design to allocate PTFE seat ring
Disc:
- Design to minimize pressure drop
- Polished sealing area in the entire perimeter to provide total sealing and ensure low operating torque
Shaft:
- Upper shaft transmits the rotation movement to the disc by means of square drive up to 10” eliminating the existence of taper pins, keys and studs, removing the possibility of wear and leakage by there parts; upper shaft fixed to the body through a spring pin, defining the “anti extrusion” system, avoiding the shaft being extruded from the body
- Lower shaft fixed to the body through a spring pin, defining the Trunnion system of the set, ensuring perfect alignment between body, disc and shaft
Actuation:
- Top flange allows easy coupling to manual, pneumatic and electric actuators
- ISO 5211 standard
Product Specifications
Production Range |
Nominal diameter 2” – 120” (50 - 3000 mm) larger size upon request |
Pressure Limit |
From vacuum up to +20 bar (290 psi) Please refer to relevant technical brochure related to seat material |
Temperature Limits |
From -20°C (-4°F) up to +150°C (+302°F) Please refer to relevant technical brochure related to seat material | Applicable Standards |
Design: ANSI B16.34/ ASME VIII/ API 609 |
Face to face: API 609 A / ISO 5211 / DIN 3337 | |
Flange: B16.5/ B16.47/ASME VIII/ DIN/ ISO/ UNI/ AWWA | |
Testing: API 598 | |
Fugitive emission: ISO 150484-1 NORSOK | |
Ratings |
ANSI CI.150 |
NP 6 -10 - 16 |
Body Style |
Wafer |
Lug | |
Double Flanged – short and long pattern | |
For FtF dimensions, please refer to relevant technical brochure | |
Materials |
Cast and Ductile iron |
Carbon Steel | |
Stainless Steel | |
Duplex - SuperDuplex | |
Aluminium bronze | |
Seat Materials |
NBR |
EPDM | |
Viton | |
PTFE | |
Hypalon | |
Neoprene | |
Silicone |