Series BF-300 Resilient-Seated Butterfly Valve
VQ-BF300
Wafer and lugged resilient-seated butterfly valve with a moulded liner, bi-directional and bubble tight to the full rating, for isolation on water, air and neutral media.
- SIZES
- DN50 to DN600
- RATING
- PN10 and PN16
- SEAT
- Bubble tight, bi-directional
- TEMPERATURE
- -10 to +120 °C
Why it is specified
The valve that is fitted a hundred times on a plant and thought about once. The liner seals on the body bore and on the flange face at the same time, so no separate gasket is needed, and the shaft is isolated from the medium. Supplied with a lever, a gear operator or an actuator.
Typical applications
- Air and gas lines
- Cooling water isolation
- District heating circuits
- Fire main isolation
- Tank inlet and outlet
Options and executions
- Chain wheel for valves above head height
- Drinking water liner approval
- Limit switch box with two inductive switches
- Lockable lever with a padlock plate
- Pneumatic or electric actuation, fail open or fail closed
- Stem extension for insulated pipework
The full table.
Figures cover the whole series. The variant table below narrows them to a part number.
PERFORMANCE
- Seat tightness
- Bubble tight to the full rating, both directions
- Kv at full open
- 280 to 48,000 m³/h, by size
- Operating torque
- 22 to 1,850 Nm at the rated differential
- Cycles to first seat service
- 20,000 typical on clean water
- Flow velocity, continuous
- 4 m/s liquid, 20 m/s gas
- Throttling range
- 30 to 70 degrees open
MATERIALS
- Body
- EN-GJS-400-15 ductile iron, epoxy coated 250 micron
- Disc
- 1.4408 stainless steel, or aluminium bronze
- Liner
- EPDM, NBR or FKM, moulded and replaceable
- Shaft
- 1.4021 stainless steel, two piece, blow-out proof
- Bushes
- PTFE lined, maintenance free
- Top flange
- ISO 5211, F05 to F16
CONNECTIONS AND RATINGS
- Sizes
- DN50 to DN600
- Body style
- Wafer or lugged, EN 593
- Flange compatibility
- EN 1092-2 PN10 and PN16, ASME Class 125 and 150
- Pressure rating
- PN16 to DN300, PN10 from DN350
- Temperature range
- -10 to +120 °C with EPDM, to +180 °C with FKM
- Face to face
- EN 558 series 20, wafer
- Operation
- Lever to DN200, gear operator from DN250
Stocked frame sizes.
| PART NUMBER | SIZE | BODY STYLE | LINER | OPERATION |
|---|---|---|---|---|
| VQ-BF300-050-W | DN50 | Wafer | EPDM | Lever |
| VQ-BF300-100-W | DN100 | Wafer | EPDM | Lever |
| VQ-BF300-200-L | DN200 | Lugged | EPDM | Gear operator |
| VQ-BF300-300-L | DN300 | Lugged | FKM | Gear operator |
| VQ-BF300-500-L | DN500 | Lugged | EPDM | Gear operator |
BF-300, DS-BF300
The datasheet is issued with the selection rather than downloaded blind, so the figures that arrive are the ones for your duty point. Ask for it with the quotation and it comes back as a PDF.
What is in it
- Kv tables and the disc position curve
- Operating torque against differential pressure
- Liner compatibility table by medium
- Face-to-face and flange drilling tables
- Actuator mounting dimensions to ISO 5211
Elsewhere in the catalogue.
CP-150
Single-stage, back pull-out end-suction pump to EN 733, for clean and lightly loaded liquids in process, cooling and transfer duty.
MD-80
Close-coupled sealless centrifugal pump with a synchronous magnetic coupling, for aggressive, toxic and expensive media where a dynamic seal is not acceptable.
GV-200
Top-guided single-seat globe valve with a multi-spring diaphragm actuator and a digital positioner, for modulating control on liquid, gas and steam.
FH-400
Stainless steel single-bag filter housing with a swing-bolt closure and an internal restrainer basket, for coarse and medium filtration on process and utility lines.
Quote the BF-300 for your duty.
Send the process data and the line size. The quotation comes back with the selection, the calculation and the lead time on the stocked variants.
Vanteq Industrial is a fictional company created for demonstration purposes. This product does not exist. The specifications, performance figures, materials and datasheet references on this page are illustrative and must not be used to select, size or buy equipment.