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Butterfly Rubber Lined Valves

BFL series

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