GRACO D31211 Husky 307 3/8 Inch PTFE Diaphragm Pump

The D31211 is a compact 3/8 inch air operated double diaphragm pump designed for reliable fluid transfer in industrial and maintenance applications.

Featuring a polypropylene center section, acetal fluid section and PTFE ball configuration, this pump provides stable performance for oil, fuel, water and general industrial fluids.

The pneumatic diaphragm design eliminates the need for electric motors and mechanical seals, providing flexible installation and reliable operation in various working environments.

Compared with larger Husky models, the Husky 307 series offers a compact solution for applications requiring moderate flow capacity and easy maintenance.

Key Features

• Compact 3/8 inch AODD pump design
• Air operated diaphragm structure
• PTFE ball configuration
• Acetal wetted components
• Polypropylene center section
• Low pulsation air valve
• Self-priming operation
• Dry-run capability

Typical Applications

• Oil transfer systems
• Fuel dispensing equipment
• Water and antifreeze transfer
• Cleaning fluid circulation
• Industrial maintenance equipment

Compact Husky 307 Design

The Husky 307 series is designed for:

• Space-saving installation
• Medium-low flow transfer
• Easy servicing
• Reliable continuous operation

Material Configuration Advantage

The D31211 configuration provides:

• PTFE chemical resistance
• Acetal wear resistance
• Stable fluid compatibility
• Suitable for general industrial fluids

Air Operated Pump Advantages

Compared with electric pumps:

• No motor overheating risk
• Suitable for flexible installation
• Self-priming capability
• Can operate without electrical power

Model Difference

D31211 Husky 307

3/8 inch connection

PTFE ball configuration

Compact industrial transfer pump

D31331 Husky 307

Similar compact platform

Different material configuration

D52911 Husky 515

1/2 inch connection

Higher flow capacity

For larger transfer applications

Installation Notes

• Confirm fluid compatibility
• Verify compressed air supply
• Check connection size
• Ensure correct diaphragm material
• Use clean operating air

FAQ

Q1: What type of pump is D31211?

A1: It is an air operated double diaphragm pump.

Q2: What is the port size?

A2: The pump uses 3/8 inch NPT connections.

Q3: What is the maximum flow rate?

A3: The maximum flow rate is approximately 24.6 L/min.

Q4: What makes D31211 different from larger Husky pumps?

A4: It is a compact 307 series pump designed for lower flow industrial transfer applications.

Q5: Does it require electrical power?

A5: No. It operates using compressed air.