Butterfly Valve
BU25 Series
Engineered for reliable isolation in utilities, steam loops, and critical process applications.
What’s Inside Matters
Engineered for Performance
Engineered for reliability, the BU25 Series combines a robust cartridge seat, secure bi-directional sealing, and a blowout-proof shaft design.
01. Top Flange
ISO 5211 top flange with square or round stem to suit various types of actuators.
02. Body
Available in full lug and wafer styles for compatibility with all flange types. Fully lugged bodies are also suitable for end-of-line service.
03. Liner
The cartridge-style seat uses a phenolic stabilising ring to minimise tearing and fatigue while maintaining low seating torque. It resists extrusion and allows quick replacement without special tools.
04. Disc
The disc edge is precision-machined and polished to ensure a tight shutoff with minimal operating torque.
05. Shaft
Secured with a stem retainer plate, the shaft is designed without a pin between disc and shaft, preventing blowout.
06. Bushing
The five-bushing PTFE design maximises radial support and shaft rigidity. It prevents shaft deflection and insulates the shaft from the valve body, enhancing control and extending service life.
07. Bi-Directional Sealing
The valve provides full-rated bi-directional sealing with equal flow performance in both directions.
BU25 Series
The BU25 Series delivers precise flow control through a compact, high-efficiency design optimised for industrial performance.
Specifications
Body Type
Wafer, Lug
Body Materials
Cast Iron GJL-250
Ductile Iron GGG40
Carbon Steel 1.0619
Stainless Steel 1.4308
Stainless Steel 1.4408
Liner
EPDM
NBR (Buna N)
PTFE
Viton
Natural Rubber
Silicone
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
Disc and Stem Connection Type
Two Pieces Shaft Design (2″ to 12″)
Spline Design (14″ & Above)
Stem Top
Square Stem Top
Key Features
- ISO 5211 top flange with square or round stem for actuator compatibility
- Wafer and lug body types, including end-of-line rated fully lugged option
- Cartridge-style liner with stabilising ring for low torque and easy replacement
- Polished disc edge for tight shut-off and reduced operating torque
- Pinless shaft with retainer plate prevents blowout
- Five PTFE bushings enhance shaft support and reduce deflection
- Full-rated bi-directional sealing for consistent flow in both directions
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.
