Butterfly Flange
AF-40, AF-50, AF-63, AF-80, AF-100, AF-125
The ASA flanged butterfly valve features both SAE and DIN connections, allowing compact hydraulic integration with elastic elements such as rubber compensators for short, economical pump connections.
- ✔
Flexible Lever Position: The lever can be repositioned using the innovative mechanism for easier operation. - ✔
Bidirectional Handle Rotation: Clockwise or counter-clockwise rotation is possible by turning the switch bracket. - ✔
Compact & Cost-Efficient: Suitable for short compensating connections with pump ports in industrial and hydraulic systems.
The adapter flange must be removed before welding to prevent damage to the seals.
Valve Structure – 3-View Drawing
Possible Valve Positions and Actuating Directions
Technical Specifications
| Description | Order No. | SAE | DIN | A (mm) | B (mm) | C (mm) | D (mm) | E (mm) | F (mm) | G (mm) | H (mm) | M | N (mm) | NW (mm) | TK (mm) | Weight (kg) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| AF 40 | SDB0040 | 1½” | 40 | 70 | 35.7 | 102 | 120 | 162 | 25 | 43 | 60 | M12 | 13.5 | 40 | 110 | 2.17 |
| AF 50 | SDB0050 | 2″ | 50 | 77.8 | 42.9 | 111 | 112 | 155 | 20 | 43 | 73 | M12 | 13.5 | 48 | 125 | 2.20 |
| AF 63 | SDB0063 | 2½” | 65 | 89 | 50.8 | 111 | 119 | 161 | 20 | 40 | 83 | M12 | 13.5 | 63 | 125 | 2.15 |
| AF 80 | SDB0080 | 3″ | 80 | 106.4 | 62 | 144 | 145 | 187 | 20 | 41 | 95 | M16 | 18 | 80 | 160 | 2.98 |
| AF 100 | SDB0100 | 4″ | 100 | 130.2 | 77.8 | 163 | 162 | 205 | 20 | 43 | 123 | M16 | 18 | 100 | 180 | 4.01 |
| AF 125 | SDB0125 | 5″ | 125 | 152.4 | 92 | 185 | 185 | 227 | 20 | 43 | 148 | M16 | 18 | 125 | 210 | 4.80 |
* Swipe horizontally to see more dimensions.
| Working Ranges | |
| max. working pressure | 7 bar(absolute) |
| max. differential pressure | 6 bar |
| temperature range | -20℃ to +80℃ |
| Materials | |
| Housing | GGG 40,cast iron |
| Lever | Steel |
| valve disc | Aluminium |
| Seals | NBR |
| Options | |
| limit switch | mechanical or inductive type |
*Disclaimer: ASA® is a registered trademark of ASA S.P.A. Our products are engineered as interchangeable equivalents and are not manufactured by, affiliated with, or endorsed by the original trademark holder. All cross-reference data and manufacturer names are provided for technical guidance and compatibility reference purposes only.
Seamless Replacement for ASA® Butterfly Valves
Engineered with the exact same installation footprint and flange patterns as ASA® series. Upgrade your hydraulic system without re-welding or pipeline modifications.
Typical Applications
![[template] flanged butterfly valve – master flanged butterfly valve for hydraulic systems (sae & din)](https://kebenglobal.com/wp-content/uploads/2025/12/蝶阀场景图1.jpg "Flanged Butterfly Valve – Master Flanged Butterfly Valve for Hydraulic Systems (SAE & DIN)")
Wind Power
Reliable Hydraulic Control for Wind Turbine Systems
The flanged butterfly valve is widely applied in wind turbine hydraulic circuits where precise flow control, high reliability, and maintenance ease are essential. Its SAE and DIN compatibility allows seamless integration with hydraulic pumps, compensators, and other auxiliary components in compact nacelle spaces.
Typical applications include:
Pitch and yaw hydraulic control circuits
Hydraulic pump inlet and outlet isolation
Short compensating connections with rubber elements
Systems exposed to cyclic pressure variations and vibration
![[template] flanged butterfly valve – master flanged butterfly valve for hydraulic systems (sae & din)](https://kebenglobal.com/wp-content/uploads/2025/12/蝶阀场景2-1.jpg "Flanged Butterfly Valve – Master Flanged Butterfly Valve for Hydraulic Systems (SAE & DIN)")
Metro & Rail Infrastructure Equipment
Safe and Stable Operation for Infrastructure Hydraulics
Metro and rail-related hydraulic systems demand high operational safety, standardized interfaces, and long service life. The flanged butterfly valve provides stable shut-off performance and compatibility with international standards, making it suitable for infrastructure-related hydraulic applications.
Typical applications include:
Metro maintenance machinery and service vehicles
Rail construction and tunnel equipment
Hydraulic auxiliary and control systems
Installations requiring standardized SAE and DIN interfaces
![[template] flanged butterfly valve – master flanged butterfly valve for hydraulic systems (sae & din)](https://kebenglobal.com/wp-content/uploads/2025/12/蝶阀场景3.jpg "Flanged Butterfly Valve – Master Flanged Butterfly Valve for Hydraulic Systems (SAE & DIN)")
Mining Machinery
Durable Performance in Harsh Operating Conditions
Mining equipment operates under extreme mechanical stress, dust exposure, and frequent pressure changes. The ASA flanged butterfly valve is engineered to maintain sealing integrity and operational stability in such environments, ensuring safe shut-off and controlled flow in hydraulic auxiliary circuits.
Typical applications include:
Underground and surface mining equipment
Hydraulic power units and auxiliary systems
High-vibration installations with limited mounting space
Applications requiring reliable bidirectional shut-off
![[template] flanged butterfly valve – master flanged butterfly valve for hydraulic systems (sae & din)](https://kebenglobal.com/wp-content/uploads/2025/12/蝶阀场景4.jpg "Flanged Butterfly Valve – Master Flanged Butterfly Valve for Hydraulic Systems (SAE & DIN)")
Construction Machinery
Reliable Flow Control for Mobile Hydraulic Systems
The flanged butterfly valve is widely used in construction machinery hydraulic circuits where compact installation, vibration resistance, and operational reliability are critical. Its SAE and DIN compatibility allows direct integration with pumps, hose assemblies, and elastic compensators in confined installation spaces.
Typical applications include:
Excavators, loaders, and road construction equipment
Hydraulic pump inlet and outlet isolation
Short compensating connections with rubber elements
Systems exposed to continuous vibration and pressure fluctuation
Engineering Confidence & Replacement Capability
ISO & Quality Assurance
Our ASA flanged butterfly valves are manufactured under a certified quality management system to ensure dimensional consistency, stable production processes, and reliable performance for industrial hydraulic applications.
- • Manufacturing and quality control processes comply with ISO 9001 requirements
- • Standardized inspection procedures applied across machining, assembly, and final inspection stages
- • Consistent dimensional control maintained for series production and replacement scenarios
ISO certification applies to the manufacturing quality management system. Product selection and application suitability remain the responsibility of the system designer or end user.
ASA Replacement Capability
The valve installation dimensions and interface specifications are fully aligned with ASA flanged butterfly valve standards, enabling direct replacement in existing hydraulic systems without structural modification.
- • Identical mounting dimensions and flange interfaces to ASA butterfly valves
- • Suitable for replacement in pump inlet and outlet connections
- • Cost-advantageous alternative for series applications and maintenance replacement
Replacement compatibility is based on installation dimensions and interface standards. Final verification of operating conditions and system compatibility is recommended prior to substitution.
Technical FAQ – ASA Flanged Butterfly Valve
Q1: Is this butterfly valve a direct replacement for ASA flanged butterfly valves?
Yes. The installation dimensions and flange interfaces are designed to match ASA flanged butterfly valve standards, allowing direct replacement in existing hydraulic systems without structural modification.
Q2: Can this valve be used with both SAE and DIN hydraulic connections?
Yes. The valve supports both SAE and DIN connections, enabling flexible integration with pumps, hose assemblies, and elastic compensators in compact hydraulic layouts.
Q3: What are the typical applications for this valve?
Typical applications include wind power hydraulic systems, metro shield and tunneling equipment, mining machinery, and construction machinery where compact installation, vibration resistance, and reliable flow isolation are required.
Q4: Is the valve suitable for high-vibration or fluctuating pressure environments?
Yes. The valve is designed for industrial hydraulic environments subject to vibration and pressure fluctuation, such as mobile machinery, wind turbines, and underground equipment.
Q5: Is this product ISO certified?
The product is manufactured under an ISO 9001 certified quality management system. ISO certification applies to the manufacturing process rather than individual product certification.
Q6: Are there any special installation precautions?
Yes. The butterfly flange may only be opened when mounted and with greased or lubricated sealing. The adapter flange must be removed before welding to avoid damage to the seals.
Final product selection and system compatibility verification remain the responsibility of the system designer or end user.
