Butterfly Valve
BU26 Series
Engineered for corrosion resistance and high-purity isolation.
What’s Inside Matters
Engineered for Performance
Its fully PFA-lined design delivers reliable shut-off, stable torque performance, and extended service life in demanding chemical, steam, and high-temperature environments.
01. Shaft
Square-type stem head design enables easy adaptation to automated actuation.
02. Belleville Washer
The specially designed elastomer washer applies live loading to maintain constant pressure on the body lining. Fluoroelastomer materials reduce deformation caused by continuous temperature variation.
03. Seat
Moulded liner is machined to deliver low torque and minimise wear on contact surfaces.
04. One-Piece Disc
The disc features a spherically machined and hand-polished edge to reduce torque and enhance sealing performance.
05. Elastomer Back-up
Matching the width of the disc edge, this back-up element locks into the body groove. It increases resilience to the body liner and provides a bubble-tight seal.
06. Body
Two-piece split body with epoxy coating resists the effects of atmospheric corrosion.
07. Stem Bearings
Bronze, PTFE, or stainless steel bearings maintain shaft alignment. Self-lubricated design reduces shaft loading.
08. ISO 5211 Mounting Flange
Universal mounting dimensions support a wide range of actuators. Direct mounting of several actuation types is possible without adapters.
BU25 Series
Engineered for corrosion resistance and high-purity isolation, the BU26 Series excels in aggressive media, thermal oil systems, and ultrapure process applications.
Specifications
Body Type
Wafer, Lug
Body Materials
Ductile Iron GGG40
Carbon Steel 1.0619
Stainless Steel 1.4408
Liner
PFA / PTFE / RTFE / TFM
Working Pressure
PN10
PN16
ANSI 150
JIS 10K
JIS 16K
Face to Face
API609
EN558-120 Series
ISO5752
DIN3202K1
Top Flange
ISO 5211
Flange Drilling
BS EN1092
JIS B2220
ASME Class 125 / Class 150
Stem Top
Square Top Flange
Key Features
- Square-type stem design allows direct mounting to various actuators
- Live-loading Belleville washer maintains liner sealing pressure under temperature changes
- Moulded seat liner ensures low torque and reduces wear on sealing surfaces
- One-piece disc with polished edge enhances sealing and reduces torque demand
- Elastomer back-up ring locks into liner groove to improve seal reliability
- Two-piece split body with epoxy coating offers excellent corrosion resistance
- Stem bearings in PTFE, bronze, or stainless ensure alignment and minimise wear
- ISO 5211 flange allows direct actuator mounting without the need for adapters
Performance Testing
Hydro Test
Air Leakage Test
Application Versatility
Built to Perform Across Industries
Our valves are engineered to deliver consistent performance across a wide range of demanding industrial environments.
Palm oil and oleochemical lines
General manufacturing
Water and wastewater pipelines
Power plant steam isolation
Chemical and blending applications
Available Options
Enhance Your Valve Functionality
Choose from a range of accessories designed to extend performance, simplify operation, and suit specific installation needs.
