Description
Crane FA648G / FA644G / FA658G / FA654G / FA678G / FA674G Fully Lugged Gearbox Operated Butterfly Valves
Ductile Iron Butterfly Valves for ANSI Class 125 Piping Systems
The Crane Fluid Systems FA648G, FA644G, FA658G, FA654G, FA678G and FA674G series comprises fully lugged, gearbox-operated butterfly valves designed for reliable isolation in water, HVAC, heating, cooling and general industrial applications.
The range covers sizes from 2″ to 24″ and is designed for connection to ANSI B16.1 Class 125 flanges. The valves feature a ductile iron body, multiple disc material options, EPDM or nitrile seat liners, and 420 stainless steel shafts for enhanced mechanical strength.
Key Features
- Fully lugged butterfly valve design
- Gearbox and handwheel operated
- Size range: 2″ to 24″
- Pressure rating: ANSI Class 125
- Ductile iron body
- Stainless steel, ductile iron and aluminium bronze disc options
- EPDM and nitrile seat liner options
- 420 stainless steel shaft
- Compatible with ANSI B16.1 Class 125 flanges
- Generally conforms to MSS SP 67
- BIM files available
- Suitable for a wide range of water and HVAC applications.
Fully Lugged Construction
The FA648G series uses a fully lugged body configuration, providing a secure bolted connection between the valve and pipe flanges.
This configuration is particularly useful for larger-diameter piping systems where a robust valve connection and convenient maintenance are required.
The valves are designed to suit ANSI B16.1 Class 125 flanges, making them suitable for projects based on North American flange standards.
Gearbox Operation
Unlike lever-operated butterfly valves, the FA648G family uses a gearbox with handwheel operation.
This makes the range particularly suitable for larger valve sizes where the operating torque would make direct lever operation impractical.
The gearbox provides:
- Reduced manual operating effort
- Controlled opening and closing
- Improved positioning
- Convenient operation on larger pipe sizes
- Easy visual identification of valve position
Durable Ductile Iron Body
The valve body is manufactured from ductile iron, providing a robust construction for water distribution, HVAC and industrial utility systems.
The range also provides several disc material options, allowing the valve configuration to be selected according to the application:
- Ductile Iron
- Stainless Steel
- Aluminium Bronze
The appropriate material combination should be selected according to the fluid, temperature and project requirements.
EPDM and Nitrile Seat Options
The FA648G family is available with different liner materials.
EPDM
EPDM is commonly selected for water-based applications, including heating and cooling water systems.
Nitrile
Nitrile provides an alternative liner option for applications where its particular resistance characteristics are required.
The choice of liner should be based on the actual service medium and operating conditions.
420 Stainless Steel Shaft
The valves use 420 stainless steel shafts, providing high mechanical strength and reliable torque transmission between the gearbox and butterfly disc.
This robust shaft construction is particularly important for larger valves where operating torque is higher.
Typical Applications
The Crane FA648G series can be used for:
- HVAC systems
- Chilled water systems
- Heating water systems
- Cooling water systems
- Commercial buildings
- Industrial water systems
- Pumping systems
- Water distribution
- Mechanical plant rooms
- District energy systems
- General industrial utilities
Crane Fluid Systems describes its butterfly valve range as quarter-turn isolation valves available in wafer or lugged configurations, with lever or gearbox operation and EPDM or nitrile liners depending on service conditions.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | Crane Fluid Systems |
| Model Series | FA648G / FA644G / FA658G / FA654G / FA678G / FA674G |
| Product Type | Butterfly Valve |
| Valve Design | Fully Lugged |
| Operation | Gearbox Operated |
| Size Range | 2″ – 24″ |
| 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 |
The manufacturer recommends referring to the applicable datasheet for complete technical information.
Product Attributes
| Attribute | Value |
|---|---|
| Brand | Crane Fluid Systems |
| Model | FA648G / FA644G / FA658G / FA654G / FA678G / FA674G |
| Product Type | Fully Lugged Butterfly Valve |
| Valve Function | Isolation |
| Operation | Gearbox Operated |
| Nominal Size | 2″ – 24″ |
| Pressure Rating | ANSI Class 125 |
| Body Material | Ductile Iron |
| Disc Material | Ductile Iron / Stainless Steel / Aluminium Bronze |
| Seat Material | EPDM / Nitrile |
| Shaft Material | 420 Stainless Steel |
| End Connection | ANSI B16.1 Class 125 |
| Design Standard | MSS SP 67 |
| Applications | HVAC, Water, Heating & Cooling, Industrial Utilities |
Why Choose the Crane FA648G Series?
The Crane FA648G / FA644G / FA658G / FA654G / FA678G / FA674G series provides a robust isolation solution for larger ANSI Class 125 piping systems.
Its combination of a fully lugged ductile iron body, gearbox operation, multiple disc and liner options, and 420 stainless steel shaft provides flexibility for different water and building-services applications. The availability of sizes up to 24″also makes the range suitable for substantially larger pipework than the corresponding lever-operated FA series.
Crane also provides the corresponding datasheet, installation/operating/maintenance documentation and BIM resources, supporting specification and engineering work.
