GAST DOA-P128-FG Vacuum Pump

( Brand: Gast ), ( Manufacturer Part Number: DOA-P128-FG ), ( Type: Vacuum )

Review GAST Vacuum Pump

The **Gast DOA-P128-FG** is a high-performance, oil-sealed rotary vane vacuum pump designed for demanding industrial applications where precision, reliability, and durability are paramount. Engineered by Gast Manufacturing, a leader in vacuum technology, this pump delivers exceptional suction power and consistent performance across a wide range of operating conditions, making it an ideal choice for laboratories, manufacturing processes, freeze-drying, chemical processing, and other specialized environments requiring precise vacuum control. With a robust construction featuring a cast iron housing and precision-machined components, the DOA-P128-FG is built to withstand continuous operation under heavy loads while minimizing wear and tear. Its oil-sealed design ensures smooth operation by maintaining a tight seal between the vanes and the rotor, reducing gas leakage and improving overall efficiency.

This vacuum pump operates with a displacement of **128 cubic inches per revolution**, translating to a maximum pumping speed of **128 CFM (cubic feet per minute)** at atmospheric inlet pressure, while achieving a ultimate vacuum level of approximately **29.9 inches of mercury (Hg)** or **10 -2 Torr**, depending on the specific application and system configuration. The pump s **1.5 horsepower (HP) motor**, paired with a robust gear reduction system, provides the necessary torque for consistent performance even under high vacuum loads. The integrated **oil reservoir** is designed to accommodate a high-quality, synthetic vacuum oil that lubricates the vanes, bearings, and other moving parts, extending the pump s operational lifespan and reducing maintenance requirements. The DOA-P128-FG also features a **self-priming capability**, allowing it to draw in air or gases efficiently without requiring external assistance, which is particularly advantageous in applications where rapid startup is critical.

One of the standout features of the Gast DOA-P128-FG is its **modular and user-friendly design**, which simplifies installation, maintenance, and troubleshooting. The pump is equipped with a **quick-connect flange** for easy integration into existing vacuum systems, while the **transparent oil sight gauge** allows operators to monitor oil levels at a glance, ensuring optimal lubrication without frequent disassembly. Additionally, the pump includes a **pressure relief valve** to protect against overpressure conditions, safeguarding both the pump and the connected system from potential damage. For enhanced safety and operational efficiency, the DOA-P128-FG is outfitted with a **thermal overload protector**, which automatically shuts down the motor if the operating temperature exceeds safe limits, preventing equipment failure due to overheating.

Built to meet rigorous industry standards, the Gast DOA-P128-FG complies with **NEMA (National Electrical Manufacturers Association) and UL (Underwriters Laboratories) safety certifications**, ensuring compliance with electrical and mechanical safety regulations. Its **IP55-rated enclosure** provides protection against dust, dirt, and splashing water, making it suitable for use in mildly corrosive or dusty environments. The pump s **low noise output**, typically below **75 decibels (dB)**, contributes to a quieter workspace, reducing operator fatigue in continuous operation settings. Whether used in pharmaceutical manufacturing, semiconductor processing, or food dehydration applications, the DOA-P128-FG delivers a balance of power, precision, and longevity, making it a versatile and dependable asset for any vacuum-dependent process.

### Pros and Cons of buying a Gast DOA-P128-FG Vacuum Pump

1. **High Performance and Efficiency** The Gast DOA-P128-FG is a robust rotary vane vacuum pump designed for high-volume applications, offering strong suction power and consistent performance. It is well-suited for industrial, laboratory, and manufacturing environments where reliable vacuum generation is critical.

2. **Durability and Build Quality** Gast is a well-established brand known for producing high-quality, long-lasting vacuum pumps. The DOA-P128-FG features a sturdy construction with precision-engineered components, reducing the likelihood of frequent breakdowns and extending its operational lifespan.

3. **Versatility** This pump is compatible with a wide range of applications, including freeze drying, chemical processing, vacuum furnaces, and laboratory equipment. Its adjustable suction capabilities make it adaptable to various tasks.

4. **Energy Efficiency** Compared to some older or lower-quality pumps, the DOA-P128-FG is designed to operate efficiently, reducing energy consumption while maintaining performance. This can lead to cost savings over time.

5. **Oil-Filled Design** The oil-filled rotary vane mechanism provides better sealing and lubrication, which enhances the pump s longevity and reduces wear on internal components. This design also helps in handling moderate amounts of moisture and contaminants.

6. **Good Support and Warranty** Gast offers customer support and typically provides warranties that cover manufacturing defects. This can be reassuring for buyers who want to ensure long-term reliability.

7. **Quiet Operation** Relative to some other industrial pumps, the DOA-P128-FG operates at a relatively lower noise level, making it more suitable for environments where noise reduction is a consideration.

---

1. **Higher Initial Cost** Gast vacuum pumps are generally more expensive upfront compared to some generic or lower-end brands. This can be a significant investment, especially for small businesses or individuals on a tight budget.

2. **Maintenance Requirements** While durable, the DOA-P128-FG requires regular maintenance, including oil changes and component inspections. Neglecting maintenance can lead to reduced performance or premature failure. Oil changes, in particular, can add to the long-term operating costs.

3. **Oil Consumption** Oil-filled pumps like this one will eventually require oil replacement. Over time, oil degradation and contamination can impact efficiency, and frequent oil changes may be necessary, adding to maintenance costs.

4. **Size and Installation Space** The DOA-P128-FG is a larger unit, which may require dedicated space for installation. This could be a limitation in smaller labs or workshops with limited room.

5. **Potential for Contamination** If not properly maintained, oil can leak or degrade, potentially contaminating the vacuum system or the environment it is connected to. This is particularly important in applications where cleanliness is critical, such as in pharmaceutical or food processing industries.

6. **Limited Lifespan Compared to Some Alternatives** While durable, rotary vane pumps like the DOA-P128-FG have a finite lifespan, especially under heavy or continuous use. Over time, wear and tear on vanes and seals will necessitate repairs or replacement.

7. **Learning Curve for Operation** Operating and maintaining a Gast vacuum pump may require some training, especially for users unfamiliar with rotary vane pumps. Improper operation can lead to damage or inefficiency.

---

The Gast DOA-P128-FG vacuum pump is a high-quality, reliable choice for applications requiring strong and consistent vacuum performance. Its durability, efficiency, and versatility make it ideal for industrial, laboratory, and manufacturing settings where reliability is paramount. However, its higher upfront cost, maintenance requirements, and potential for oil-related issues must be carefully considered. If budget allows and maintenance can be consistently performed, this pump is an excellent investment. For users with limited space or those seeking lower-cost alternatives, other brands or models may be more suitable.

---

- You require a robust, high-performance vacuum pump for demanding applications.

- You are willing to invest in a durable, long-lasting unit despite the higher initial cost.

- You can commit to regular maintenance (oil changes, inspections) to ensure optimal performance.

- Your application benefits from the pump s versatility and efficiency, such as in freeze drying, chemical processing, or industrial manufacturing.

- Your budget is tight, and you are open to exploring lower-cost brands or used pumps that may offer similar performance.

- You require a pump with minimal maintenance requirements, such as dry or diaphragm pumps.

- Your application involves highly sensitive or clean environments where oil contamination is a concern.

- Space constraints make it difficult to accommodate a larger unit like the DOA-P128-FG.

Details:

Gast DOA-P128-FG Vacuum Pump.

part #: doap128 price

• $139.99

specifications valvplu:

• brand: Gast
• mpn: Doa-p128-fg
• type: Vacuum

payments valvplu:

• other
• credit card: Diners-club
• wallet: Paypal

returns valvplu:

• policy: No Returns

general valvplu:

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

shipping valvplu:

• service: FedEx Ground / FedEx Home Delivery
• class: Standard
• carrier: FedEx
• transit: 4-10 Days
• cost: $125.10
• type: Calculated

offer valvplu:

• best offers: True
• sold: 0
• availability: In Stock
• quantity: 1
• options: Ship-to-home
• started: March 22, 2026

seller valvplu:

• # reviews: 9
• rating: 100.0%
• city: Oxnard, California

Gast DOA-P128 Is Similar To:

• 00a-p125-aa Gast Compressor Vacuum Pump (53.7% similar) Comes as shown. Used items have a 30-DAY return. No means to test further. Has some cosmetic wear. Powers up, suction works. Comes from a reliable source...(October 24th, 2018)
• 0113934773 Gast Vacuum Generator (40% similar) These are typically larger items. And 3:00 PO...(March 6th, 2018)
• 0211-v103 Gast Model Air Vacuum Pump Motor Hp Rpm (46.8% similar) Please feel free to contact me for as quote but do so Upton 24 hours before the offer ends. Gast model 0211-V103 air vacuum pump motor 1/6 hp, 115 v, 1725 rpm this listing is for a used that comes as you see pictured and noted above. My goal is your satisfaction. I just plugged this in and it runs. ...(June 1st, 2018)
• 0211-v122-284 Gast Rotary Vacuum Pump Compressor Volts (46.3% similar) Most items are available for expedited shipping if needed. Any order placed after 9:00. Never used or hooked up. Please bid accordingly. If you happen to have an issue with item. Virgin islands. Comes exactly as shown in the attached photographs. Gast 0211-V122-284 oil-less rotary vacuum pump ...(May 1st, 2018)
• 0211-v122-284x Gast Rotary Vacuum Pump Compressor Single Phase (42.2% similar) This does not represent a guarantee or warranty about the items functionality beyond what is depicted in photos. Comes exactly as shown in the attached photographs. Any order placed after 9:00. Gast 0211-V122-284X oil-less rotary vacuum pump compressor 1/4 hp single phase new old stock testing ...(May 1st, 2018)
• 0211-v138-g8cx Gast Nuarc M35 Vacuum (40.6% similar) For more high quality equipment. 4HZ 60PH 1TIME ration cont great working condition. All pictures are of actual item. Gast narc vacuum pump compressor WITH1 6 hp heavy duty Emerson motor model 0211-V138-G8CXM35SERIAL M35 A91-015 motor, model SA55JXGTD-4144HP 1/6 115VRPM 1725A...(January 30th, 2018)
• 0211-v138-gxcx Gast Vacuum Pump W (52.5% similar) Guarantee non-doa unless stated as parts or repair untested. During that period, response rate might be slow. Shipping within the 48 contiguous USA is available for sure. Cord needed. Box delivery is accepted for small item no APO FPO. Return is accepted for all tested and working item. Feel free to...(November 15th, 2017)
• 0211-v207 Gast Electric Vacuum Vac Pump Volt (47.2% similar) Gast 0211-V207 electric vacuum vac pump 115 volt...(January 6th, 2019)
• 0211-v222-g8c Gast Hp Rotary Vane Vacuum Pump Rpm (46.8% similar) 3 cfm max flow rate. Ship to the lower 48 states. Has a 30 day money back guarantee horsepower, 1725 rpm, 20 psi max pressure, this pump has been used a lot, it still seams to work well...(May 27th, 2018)
• 0211-v36a-g8c Gast Used Vacuum Pump (54% similar) Unit shows some cosmetic wear see photos fast shipping...(March 26th, 2018)
• 0211-v36a-g8cx Gast Hp Vacuum Pump Assembly Switched Cord Works (39.6% similar) Gast 0211-V36A-G8CX 1/6 hp vacuum pump assembly w switched cord 115V works...(April 20th, 2018)