
1811-1-2-400 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $961.00 | Condition is New, ARMSTRONG 1811-1/2-400 / 181112400 (BRAND NEW), shipping cost = $12.90 | 97.8% |
![]() | $961.00 | Condition is New, ARMSTRONG 1811-1/2-400 / 181112400 (BRAND NEW), shipping cost = $12.90 | 99.7% |

The Armstrong International 1811-1/2-400 pump, also known as model number 181112400, is a versatile and reliable vertical inline centrifugal pump designed for various industrial applications. This pump is part of Armstrong's renowned and extensive line of pumps, known for their durability, efficiency, and performance.
The 1811-1/2-400 pump features a vertical, close-coupled design that allows for easy installation and maintenance. The pump's impeller is mounted directly on the motor shaft, eliminating the need for a separate motor base and coupling, which simplifies the installation process and reduces installation costs. The pump's compact design also allows for easy integration into tight spaces, making it an excellent choice for applications with limited installation clearances.
The pump's construction includes a cast iron volute and impeller, which provide excellent strength and durability. The pump's casing is made of corrosion-resistant materials, ensuring long-lasting performance even in harsh environments. The pump's mechanical seal is designed to provide reliable and efficient operation, with a seal chamber that is easily accessible for maintenance.
The 1811-1/2-400 pump is capable of handling a wide range of fluids, including water, chemicals, and slurries, and is available in various material options to suit specific applications. The pump's flow rate ranges from 2 to 30 gallons per minute (GPM), and its maximum head pressure is 135 feet of water (FW). The pump is also available in various power options, including 1/60, 50, and 60 Hz, and in various voltage options, including 230/460 V and 347/660 V.
The 1811-1/2-400 pump is designed to provide reliable and efficient operation, with features such as a volute diffuser that ensures efficient fluid flow and a hydraulically balanced impeller that reduces vibration and noise. The pump also includes a built-in recirculation system that allows for easy priming and prevents cavitation, ensuring smooth and consistent operation.
The Armstrong International 1811-1/2-400 pump is backed by Armstrong's industry-leading warranty, which provides customers with peace of mind and confidence in their investment. The pump is also supported by Armstrong's extensive network of technical experts and service centers, ensuring that customers have access to expert advice and support whenever they need it.
In summary, the Armstrong International 1811-1/2-400 pump, model number 181112400, is a versatile and reliable vertical inline centrifugal pump designed for various industrial applications. Its compact design, durable construction, and efficient operation make it an excellent choice for applications where reliability, performance, and ease of installation are key considerations.
The Armstrong International 1811-1/2-400 181112400 is a vertical inline pump model, commonly used in various industrial applications due to its compact design and efficient performance. Here are some pros and cons of buying this pump model:
Pros:1. Compact Design: The vertical inline design takes up less space than traditional horizontal pumps, making it ideal for applications where space is a constraint.
2. Efficient Performance: The pump offers high suction lift capabilities and can handle a wide range of fluids, making it a versatile option for various industrial processes.
3. Reliability: Armstrong International is a well-known brand in the pump industry, and the 1811-1/2-400 model is known for its durability and reliability.
4. Easy Installation: The vertical inline design allows for easy installation and maintenance, as all the components are easily accessible.
Cons:1. Limited Flow Rates: The 1811-1/2-400 model has a lower flow rate capacity compared to larger pumps, making it less suitable for applications requiring high flow rates.
2. Higher Cost: Due to its high-performance capabilities and compact design, the Armstrong 1811-1/2-400 model may have a higher upfront cost compared to other pump models.
3. Limited Size Range: This model is available in a limited range of sizes, so it may not be suitable for applications requiring larger or smaller pumps.
Conclusion:The Armstrong International 1811-1/2-400 181112400 is an ideal choice for applications where space is a constraint and efficient performance is required. Its high suction lift capabilities and versatility make it a popular option for various industrial processes. However, its limited flow rate capacity, higher cost, and limited size range may make it less suitable for some applications.
Recommendation:If you are looking for a compact, high-performance pump for your industrial application, the Armstrong International 1811-1/2-400 181112400 model is a great option to consider. However, it is important to carefully evaluate your specific application requirements, including flow rate, fluid type, and available space, before making a final purchase decision. Consulting with a pump expert or the manufacturer's representative can help you make an informed decision based on your unique application needs.
Details:
Armstrong 1811-1/2-400 / 181112400 brand new 1/2 not.s. All products are guaranteed to be working but may show signs of use if purchasing a used product. Packaging and handling: items are safely eds packaged in custom shipping cartons for protection. Sells new and surplus product develops channels to purchase such.
Call to use a shipping service other than the ones listed.
specifications maxohvac:
- brand: Armstrong Pumps
- mpn: 1811-1/2-400
- part type: Hvac
seller maxohvac:
- # reviews: 196153
- city: 1 millennium dr, willingboro, nj 08046
- rating: 99.6%
payments maxohvac:
- wallet: apple-pay
- credit card: mastercard
- other
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
returns maxohvac:
- method: money back
- time: 30 days
- paid by: buyer
- policy: returns accepted
offer maxohvac:
- in stock #: 2
- started: march 24, 2026
- availability: in stock
- price: $961.00
- item condition: New
- options: ship-to-home
- sold #: 13
shipping maxohvac:
- transit: 29-34 days
- service: standard
- class: standard
- type: fixed
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