GRACO Husky 307 D31331 1/4 Inch Air Diaphragm Pump

The D31331 is a compact air operated double diaphragm pump designed for reliable fluid transfer in small-scale industrial and equipment applications.

Featuring a 1/4 inch connection size and polypropylene pump body, this pump provides excellent chemical compatibility and stable fluid handling performance.

The air-driven diaphragm design eliminates the need for electric motors, allowing safe operation in applications requiring portable, flexible or explosion-resistant pumping solutions.

Compared with larger diaphragm pumps, the Husky 307 series offers a compact footprint and is ideal for low-flow transfer applications.

Key Features

• Compact 1/4 inch AODD pump design
• Air operated drive system
• Polypropylene pump body
• Santoprene diaphragm
• Self-priming capability
• Can run dry without damage
• Suitable for chemical fluid transfer

Typical Applications

• Chemical transfer equipment
• Coating and painting systems
• Laboratory fluid handling
• Water treatment equipment
• Small industrial circulation systems
• Machine supply systems

Compact Air Operated Design

The Husky 307 design provides:

• Small installation footprint
• Flexible mounting options
• Reliable operation without electrical power
• Easy maintenance

Air Diaphragm Pump Advantages

Compared with electric pumps:

• Suitable for hazardous environments
• No motor overheating risk
• Self-priming operation
• Dry-run capability

Material Compatibility

The polypropylene body provides:

• Good chemical resistance
• Lightweight construction
• Reliable industrial performance

Model Difference

Husky 307 D31331

1/4 inch compact pump

Low flow transfer

Small equipment applications

Husky 716 D54381

3/4 inch larger pump

Higher flow capability

Industrial transfer applications

Installation Notes

• Confirm fluid compatibility
• Check air supply pressure
• Verify diaphragm material suitability
• Install correct piping size
• Use clean compressed air

FAQ

Q1: What type of pump is D31331?

A1: It is an air operated double diaphragm pump.

Q2: What is the port size?

A2: The port size is 1/4 inch.

Q3: Does it require electrical power?

A3: No. It operates using compressed air.

Q4: Can this pump run dry?

A4: Yes. The diaphragm design allows dry running operation.

Q5: What applications are suitable?

A5: It is suitable for small-scale fluid transfer, chemical handling and industrial equipment.