GRACO D52911 Husky 515 1/2 Inch PTFE Diaphragm Pump

The D52911 is a 1/2 inch air operated double diaphragm pump designed for reliable transfer of chemically aggressive and industrial fluids.

Featuring a polypropylene fluid section with PTFE diaphragms and PTFE balls, this pump provides excellent chemical resistance and long service life in demanding fluid handling applications.

The air-operated design eliminates the need for electric motors and mechanical seals, providing safer operation with reduced leakage risk.

Compared with standard diaphragm configurations, the PTFE wetted components make D52911 more suitable for corrosive chemicals and high-purity fluid transfer applications.

Key Features

• 1/2 inch NPT air operated diaphragm pump
• PTFE diaphragm and ball configuration
• Polypropylene fluid section
• High chemical compatibility
• Low pulsation air valve design
• No mechanical seal leakage points
• Self-priming operation
• Dry-run capability

Typical Applications

• Chemical transfer systems
• Water treatment equipment
• Coating and painting systems
• Industrial processing equipment
• Fluid circulation systems
• Corrosive liquid handling

PTFE Material Advantage

Compared with Santoprene diaphragm versions, PTFE construction provides:

• Better chemical resistance
• Improved compatibility with aggressive fluids
• Longer service life in harsh environments
• Suitable for demanding applications

Medium Flow Industrial Design

The Husky 515 platform provides:

• 56.7 L/min maximum flow
• Compact installation size
• Reliable continuous operation
• Easy maintenance structure

Air Operated Pump Advantages

The pneumatic design offers:

• No electrical motor required
• Safe operation in hazardous areas
• Self-priming capability
• Dry running capability

Model Difference

D52911

1/2 inch NPT

PTFE diaphragm and PTFE balls

For chemical-resistant applications

D52966

1/2 inch NPT

Santoprene diaphragm configuration

General industrial transfer

D31331

1/4 inch compact pump

Low flow applications

Installation Notes

• Confirm fluid compatibility with PTFE materials
• Verify air supply pressure
• Check inlet and outlet connection size
• Use clean compressed air
• Confirm chemical temperature requirements

FAQ

Q1: What type of pump is D52911?

A1: It is an air operated double diaphragm pump.

Q2: What makes D52911 different from D52966?

A2: D52911 uses PTFE diaphragms and PTFE balls for improved chemical resistance.

Q3: What is the maximum flow rate?

A3: The maximum flow rate is 56.7 L/min.

Q4: Does it require electrical power?

A4: No. It operates using compressed air.

Q5: What fluids can it handle?

A5: It is suitable for many industrial fluids depending on chemical compatibility.