Description
Crane FA648L / FA644L / FA658L / FA654L / FA678L / FA674L Fully Lugged Butterfly Valves
Ductile Iron Fully Lugged Lever Operated Butterfly Valves – ANSI Class 125
The Crane Fluid Systems FA648L / FA644L / FA658L / FA654L / FA678L / FA674L series is a range of fully lugged, lever-operated butterfly valves designed for reliable isolation in water, HVAC, heating, cooling, and general building services applications.
These valves are available in sizes from 2″ to 8″ and are designed for connection to ANSI B16.1 Class 125 flanges. The range uses a ductile iron body with several disc and liner material options, allowing the valve to be selected according to the application and operating medium.
The fully lugged design provides a robust bolted connection between the valve and pipe flanges and is particularly useful where secure installation and maintenance flexibility are required.
Key Features
- Fully lugged butterfly valve design
- Lever-operated quarter-turn operation
- Size range: 2″ to 8″
- Pressure rating: ANSI Class 125
- Ductile iron construction
- Stainless steel and aluminium bronze disc options
- EPDM and nitrile seat liner options
- 420 stainless steel shafts for high mechanical strength
- Compatible with ANSI B16.1 Class 125 flanges
- Valve generally conforms to MSS SP 67
- BIM files available for engineering and building design.
Fully Lugged Design
The fully lugged configuration incorporates threaded lugs around the valve body, allowing the valve to be securely bolted to the mating flanges.
This design provides several practical advantages during installation and maintenance. It is particularly useful where the valve needs to be independently secured between pipe flanges and where future maintenance access is important.
The FA series is specifically designed for ANSI B16.1 Class 125 flange systems, making it suitable for projects using North American flange standards.
Durable Ductile Iron Construction
The valve body is manufactured from ductile iron, providing a strong and durable construction suitable for a wide range of water and building-services applications.
Depending on the selected model and service requirements, the butterfly disc can be supplied in different materials, including:
- Ductile iron
- Stainless steel
- Aluminium bronze
The available material combinations allow engineers to select a suitable configuration based on the fluid, temperature, corrosion conditions, and project requirements.
Seat and Liner Options
The FA648L / FA644L / FA658L / FA654L / FA678L / FA674L family is available with different liner materials.
EPDM Liner
EPDM is commonly used for water and HVAC applications where good resistance to water-based media is required.
Nitrile Liner
Nitrile provides an alternative for applications where its specific chemical and temperature resistance characteristics are required.
The actual liner and disc material should be selected according to the operating medium and service conditions.
420 Stainless Steel Shaft
The valves incorporate 420 stainless steel shafts, providing high mechanical strength and durability for repeated quarter-turn operation.
The robust shaft construction contributes to reliable torque transmission between the lever and butterfly disc while supporting long-term valve operation.
Applications
The Crane FA648L / FA644L / FA658L / FA654L / FA678L / FA674L series is suitable for a variety of building-services and fluid-control applications, including:
- HVAC systems
- Chilled water systems
- Heating water systems
- Cooling water systems
- Commercial buildings
- Industrial water systems
- Mechanical plant rooms
- Pumping systems
- Water distribution
- General building services
- Industrial utilities
Crane Fluid Systems butterfly valves are part of a broader range of quarter-turn isolation valves supplied in wafer and lugged configurations with either lever or gearbox operation.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Crane Fluid Systems |
| Product Series | FA648L / FA644L / FA658L / FA654L / FA678L / FA674L |
| Product Type | Butterfly Valve |
| Valve Design | Fully Lugged |
| Operation | Lever Operated |
| Size Range | 2″ – 8″ |
| Pressure Rating | ANSI Class 125 |
| Body Material | Ductile Iron |
| Disc Options | Ductile Iron / Stainless Steel / Aluminium Bronze |
| Seat Liner Options | EPDM / Nitrile |
| Shaft Material | 420 Stainless Steel |
| Flange Standard | ANSI B16.1 Class 125 |
| Design Standard | Generally conforms to MSS SP 67 |
| Operation | Quarter Turn |
| BIM | Available |
| Applications | HVAC, Water, Heating & Cooling Systems |
The manufacturer’s product page specifies that full technical information should be taken from the applicable datasheet.
Product Attributes
| Attribute | Value |
|---|---|
| Brand | Crane Fluid Systems |
| Model Series | FA648L / FA644L / FA658L / FA654L / FA678L / FA674L |
| Product Type | Fully Lugged Butterfly Valve |
| Operation | Lever Operated |
| Size Range | 2″ – 8″ |
| Pressure Rating | ANSI 125 |
| Body Material | Ductile Iron |
| Disc Material | Ductile Iron / Stainless Steel / Aluminium Bronze |
| Seat Material | EPDM / Nitrile |
| Shaft Material | 420 Stainless Steel |
| Connection | ANSI B16.1 Class 125 |
| Design Standard | MSS SP 67 |
| Valve Function | Isolation |
| Applications | HVAC, Water, Heating, Cooling |
| BIM Available | Yes |
Why Choose Crane FA648L Series?
The Crane FA648L / FA644L / FA658L / FA654L / FA678L / FA674L series provides a versatile solution for projects requiring fully lugged butterfly valves with ANSI Class 125 flange compatibility.
The combination of a ductile iron body, multiple disc and liner material options, and 420 stainless steel shafts allows the valve configuration to be matched to different service conditions. The lever-operated quarter-turn design also provides straightforward manual isolation for HVAC and water systems.
Crane Fluid Systems also provides datasheets, installation and maintenance documentation, and BIM files for this valve family, supporting engineers and contractors during specification, design, installation, and maintenance.
