GRACO Husky 307 AC Diaphragm Pump (Part Number: D3A211): A Comprehensive Overview

Product Introduction

The GRACO Husky 307 AC Air-Operated Double Diaphragm (AODD) Pump, bearing the part number D3A211, represents a significant achievement in fluid handling technology, engineered for superior performance in demanding industrial environments. This pump is specifically configured with a Polypropylene (PP) Center Section, AC Seats, PTFE Balls, and a PTFE Diaphragm, making it an ideal solution for handling corrosive chemicals, solvents, and a wide variety of challenging fluids. Designed with a 3/8-inch BSP port configuration, the Husky 307 AC combines robust construction with operational efficiency, ensuring reliable transfer capabilities across chemical processing, industrial manufacturing, and wastewater treatment sectors. Graco, a globally recognized leader in fluid handling equipment, has engineered this pump to set new benchmarks for durability and minimal maintenance requirements.

Technical Specifications

The Husky 307 AC (D3A211) is built with precise engineering specifications that cater to a wide range of application needs. Below is a detailed table of its key technical parameters:

Table 1: Detailed Technical Specifications for Husky 307 AC (D3A211)

This pump delivers a reliable flow rate of 18.9 liters per minute and can handle fluids containing solid particles up to 1.5 mm in diameter, making it versatile for various industrial fluids, including those with mild abrasives

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Design Features & Material Construction

The strategic selection of materials in the D3A211 model is paramount to its performance and longevity, particularly when handling aggressive media.

Table 2: Material Configuration and Functional Benefits

The pump features a robust design that includes a non-lubricated, stall-free dual cup spool air valve, which consists of only nine components, significantly simplifying maintenance and reducing potential failure points

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Performance Advantages

The GRACO Husky 307 AC pump is designed to offer several distinct performance advantages in competitive industrial settings:

• Exceptional Chemical Compatibility: The combination of PP, ACETAL, and PTFE materials allows the pump to handle a vast array of corrosive chemicals, acids, alkalis, and solvents, reducing the risk of material failure and contamination

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• Dry-Run Capability: Like other high-quality AODD pumps, the Husky 307 AC can run dry for extended periods without sustaining damage, providing operational flexibility and protection in case of unexpected feed supply loss.

• Self-Priming Performance: With a suction lift of 3.7 meters, the pump exhibits good self-priming characteristics, making it suitable for applications where the fluid source is located below the pump

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• Explosion-Proof Operation: As the pump is powered solely by compressed air, it is inherently explosion-proof, making it a safe choice for use in hazardous environments where electrical sparks could pose a risk.

• Efficient Solids Handling: The capability to pass solids up to 1.5 mm in diameter allows it to manage slightly contaminated or semi-suspended fluids without clogging, adding to its application versatility

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Application Areas

The versatility and chemical resistance of the Husky 307 AC (D3A211) make it a valuable asset across numerous industries. Its design is suited for transferring a wide spectrum of fluids safely and efficiently.

Table 3: Common Industrial Applications of the Husky 307 AC Pump

The pump's corrosion-resistant construction ensures long-term reliability in these demanding applications, minimizing downtime and maintenance costs

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Operational & Maintenance Guidelines

For optimal performance and an extended service life, proper operation and maintenance of the Husky 307 AC pump are essential.

• Air Supply Requirements: The pump requires a clean, dry air supply within its operating pressure range (up to 7 bar / 100 psi). The air inlet connection is 1/4 inch NPT

• . Using a filter-regulator-lubricator (FRL) unit is often recommended to protect the pump's air valve and ensure smooth operation.

• Installation: The pump should be mounted on a stable, level surface. Piping should be adequately supported independently of the pump to avoid stressing the inlet and outlet connections. Ensuring the suction line is airtight is crucial for maintaining prime.

• Priming: As a self-priming pump, it typically does not require manual priming. However, ensuring the suction line is filled with fluid can lead to faster start-up.

• Maintenance: The pump's design, with its minimal number of valve components, simplifies maintenance

• . Periodic inspection of the diaphragm, balls, and seats for wear is recommended. While the PTFE diaphragm offers an extended service life, it should be inspected regularly and replaced in pairs if a failure occurs. The valve seats and balls are also wearable items and should be checked during diaphragm replacement.

Conclusion

The GRACO Husky 307 AC Diaphragm Pump (Part Number: D3A211) stands out as a highly reliable and efficient solution for transferring corrosive and challenging fluids. Its thoughtful engineering, featuring a Polypropylene center section, ACETAL wetted parts, and PTFE diaphragms and balls, provides exceptional chemical resistance and durability. With a proven performance profile that includes a flow rate of 18.9 L/min, a 70-meter head, and the ability to handle small solids, this pump is built to excel in the most demanding industrial environments.

For industries seeking to enhance their fluid handling operations with a pump that offers low maintenance, explosion-proof safety, and long-term cost-effectiveness, the GRACO Husky 307 AC (D3A211) represents a superior choice, backed by Graco's global reputation for quality and innovation in fluid handling technology.