ARO 666150-3C9-C Ingersoll Rand Air Pump Double Diaphragm PD15A-AAP-STT 1-1/2

( Brand: Aro ), ( Manufacturer Part Number: 666150-3C9-C ), ( Part Type: Pump ), ( Power Source: Pneumatic ), ( Inlet Diameter: 1 1/2 In ), ( Diaphragm Pump Type: Double Diaphragm Pump ), ( Maximum Pressure: 120 Psi )

Review ARO Ingersoll Rand Air Double Diaphragm Pump 1-1/2 Inch Aluminium

The **Ingersoll Rand PD15A-AAP-STT Air Double Diaphragm Pump (Model 666150-3C9-C)** is a robust, high-performance industrial pump engineered for reliable fluid transfer in demanding applications where precision, durability, and versatility are paramount. Part of Ingersoll Rand s trusted line of air-operated double diaphragm (AODD) pumps, this model is specifically designed to handle a wide range of corrosive, abrasive, viscous, or shear-sensitive fluids with ease, making it an indispensable asset in industries such as chemical processing, wastewater treatment, food and beverage production, pharmaceutical manufacturing, and general industrial operations. With a **1.5-inch (1-1/2") discharge size**, this pump delivers a balanced combination of flow rate and pressure, capable of moving fluids at rates up to **15 gallons per minute (GPM)** while generating pressures of up to **150 pounds per square inch (PSI)**, depending on the specific operating conditions and fluid properties. Its **air-operated mechanism** eliminates the need for electrical components, reducing the risk of sparks or electrical hazards in explosive or wet environments, and ensures reliable operation even in areas with inconsistent power supplies.

The pump s **double diaphragm design** enhances its longevity and efficiency by distributing wear evenly across two diaphragms, significantly extending the lifespan of the pump compared to single-diaphragm models. This feature also minimizes downtime due to maintenance, as the diaphragms can be replaced individually without requiring a full pump overhaul. The **AAP (Air Actuated Pump) series** incorporates a **pulse-free delivery system**, which reduces fluid turbulence and shear stress, making it ideal for handling sensitive materials like slurries, pastes, or emulsions without compromising their integrity. The **STT (Standard Transmission)** configuration ensures smooth and consistent operation, with a robust transmission system that efficiently transfers air pressure to the diaphragms, optimizing energy use while maintaining steady performance.

Constructed from **high-quality materials**, the PD15A-AAP-STT is built to withstand the rigors of industrial environments. Its **cast iron housing** provides structural integrity and resistance to impact, while the **stainless steel wetted components** (such as the discharge head, valves, and shaft) offer superior corrosion resistance, making it suitable for handling aggressive chemicals, acids, or alkaline solutions. The pump s **self-priming capability** allows it to draw fluid from low points or sumps without requiring pre-priming, further simplifying installation and operation. Additionally, the **quick-connect fittings** and **easy-access design** facilitate rapid maintenance and part replacement, reducing operational downtime and increasing productivity.

One of the standout features of this pump is its **versatility in fluid handling**. Whether managing thick slurries, thin liquids, or even solids-laden mixtures, the PD15A-AAP-STT excels in applications where other pumps may struggle. Its **adjustable air pressure control** allows operators to fine-tune performance based on the specific requirements of the fluid being transferred, ensuring optimal efficiency and energy savings. The pump s **low-maintenance operation** is further enhanced by its **sealed air motor**, which prevents contamination of the air supply and reduces the risk of leaks, while the **durable check valves** ensure unidirectional flow with minimal backpressure.

Safety and reliability are at the forefront of Ingersoll Rand s engineering, and the PD15A-AAP-STT reflects this commitment. The pump is equipped with **fail-safe mechanisms** that prevent air leaks and ensure consistent operation, even under fluctuating conditions. Its **compact yet sturdy construction** allows for flexible installation in tight spaces, whether mounted on a skid, suspended from a ceiling, or integrated into an existing system. The **user-friendly design** also includes clear labeling and straightforward controls, making it accessible for operators with varying levels of technical expertise.

In summary, the **Ingersoll Rand PD15A-AAP-STT Air Double Diaphragm Pump (Model 666150-3C9-C)** is a high-performance, low-maintenance workhorse designed to deliver dependable fluid transfer in the most challenging industrial environments. With its **1.5-inch discharge size**, **pulse-free delivery**, **corrosion-resistant materials**, and **air-operated reliability**, this pump is a cost-effective solution for applications requiring durability, efficiency, and versatility. Whether used in chemical processing, wastewater treatment, or food production, the PD15A-AAP-STT ensures consistent performance, minimal downtime, and long-term operational success.

### **Pros and Cons of buying a Ingersoll Rand PD15A-AAP-STT Air Double Diaphragm Pump (Model ARO 666150-3C9-C, 1-1/2")**

#### **Pros**

1. **Reliability and Durability** Ingersoll Rand is a well-established brand known for manufacturing robust industrial equipment. The PD15A series is designed for heavy-duty applications, making it suitable for continuous use in demanding environments.

2. **Versatile Fluid Handling** As an air-operated double diaphragm (AODD) pump, it can handle a wide range of fluids, including slurries, chemicals, abrasive materials, and viscous liquids, without clogging or damage from solids.

3. **Self-Priming Capability** Unlike some pumps, this model can draw fluid from a low or negative head, reducing the need for additional priming systems.

4. **Low Maintenance Requirements** The diaphragm design minimizes wear on internal components, reducing the frequency of repairs and part replacements compared to centrifugal or positive displacement pumps with moving seals.

5. **Explosion-Proof and Sanitation-Grade Options** Depending on the specific model variant, this pump may be available in explosion-proof or food-grade materials, making it suitable for hazardous or sanitary applications.

6. **Energy Efficiency** Air-operated pumps do not require electrical power, relying instead on compressed air, which can be more efficient in certain applications where electricity is costly or unreliable.

7. **Compact and Portable Design** The 1-1/2" size makes it suitable for applications with space constraints, and its modular design allows for easy installation and relocation.

8. **Wide Flow and Pressure Range** The PD15A series can handle varying flow rates and pressures, making it adaptable to different process requirements.

9. **Corrosion Resistance** Many versions of this pump are constructed with materials like stainless steel or elastomers that resist corrosion from aggressive chemicals.

10. **Aftermarket Support** Ingersoll Rand has a global network of distributors and service centers, ensuring availability of spare parts and technical support.

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#### **Cons**

1. **Higher Initial Cost** Compared to some generic or lower-end AODD pumps, Ingersoll Rand equipment tends to be more expensive upfront, though this is often justified by long-term reliability.

2. **Dependence on Compressed Air** The pump requires a stable supply of clean, dry compressed air. Fluctuations in air pressure or quality can affect performance and may require additional filtration or regulation systems.

3. **Noise Levels** Air-operated pumps can be louder than electric pumps, which may be a concern in noise-sensitive environments unless proper soundproofing is implemented.

4. **Limited Lifespan of Diaphragms and Seals** While durable, the diaphragms and seals are wear items that will eventually need replacement, adding to long-term operational costs.

5. **Potential for Air Leaks** Improper installation or aging seals can lead to air leaks, reducing efficiency and increasing energy consumption.

6. **Not Ideal for High-Viscosity Fluids Without Adjustments** While capable of handling viscous fluids, performance may degrade if the fluid viscosity is extremely high without proper pump sizing or adjustments.

7. **Specialized Installation Requirements** Proper foundation, piping, and air supply setup are critical. Poor installation can lead to vibration, reduced efficiency, or premature failure.

8. **Limited Customization for Extreme Conditions** Some extreme applications (e.g., very high temperatures or corrosive environments) may require additional modifications not standard in the base model.

9. **Training and Expertise Needed** Operating and maintaining an Ingersoll Rand pump effectively may require trained personnel, especially for troubleshooting or complex installations.

10. **Environmental Considerations** Compressed air systems consume energy, and if the air supply is generated on-site (e.g., via air compressors), the overall energy footprint of the pump may be higher than electric alternatives.

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### **Conclusion**

The **Ingersoll Rand PD15A-AAP-STT (1-1/2")** is a high-quality, reliable air double diaphragm pump well-suited for industrial applications requiring robust fluid handling, low maintenance, and versatility across different fluid types. Its durability, self-priming capability, and compatibility with harsh environments make it a strong choice for sectors like wastewater treatment, chemical processing, mining, and food production.

However, the **higher upfront cost, dependence on compressed air, and potential noise and maintenance requirements** must be carefully considered. If your application demands **reliability, abrasive fluid handling, or explosion-proof operation**, this pump is an excellent investment. For applications where **electric pumps or lower-cost alternatives** would suffice, the added benefits may not justify the expense.

### **Recommendation**

- You need a **durable, low-maintenance pump** for **abrasive, viscous, or corrosive fluids**.

- Your facility already has a **reliable compressed air supply**.

- You require **self-priming or explosion-proof capabilities**.

- Long-term reliability and **minimal downtime** are priorities.

- Your budget is constrained, and a **lower-cost generic AODD pump** would meet your needs.

- Your application does not require **air operation** (e.g., if electricity is more convenient).

- You lack **proper installation or maintenance expertise**.

- Noise or **energy efficiency** (from compressed air) are critical concerns.

For most **industrial or heavy-duty applications**, this pump is a **strong recommendation** due to its proven performance and longevity. However, always conduct a **detailed cost-benefit analysis** and consult with a specialist to ensure it aligns with your specific operational requirements.

Details:

Used Ingersoll Rand ARO double diaphragm pump in working condition. Missing air muffler. Was used to pump cooling oil. Look at pics for condition and.

Pump was taken out of service due to machine change.

part #: 6661503c9 price

• $599.00

specifications valvplu:

• brand: Aro
• mpn: 666150-3c9-c
• part type: Pump
• power source: Pneumatic
• inlet diameter: 1 1/2 In
• diaphragm pump type: Double Diaphragm Pump
• maximum pressure: 120 Psi

shipping valvplu:

• service: USPS Ground Advantage, FedEx Ground / FedEx Home Delivery
• type: Calculated
• transit: 5-11 Days
• class: Standard
• carrier: USPS, FedEx
• cost: $127.25

seller valvplu:

• rating: 99.9%
• # reviews: 9196
• city: Bowling Green, Kentucky

returns valvplu:

• policy: No Returns

general valvplu:

• condition: Used
• Pumps Pump Accessories > Vacuum Pumps > Diaphragm Pumps

offer valvplu:

• options: Ship-to-home
• sold: 0
• availability: In Stock
• started: March 7, 2026
• quantity: 1

payments valvplu:

• credit card: Visa
• wallet: Apple-pay
• other

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