
312178 Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $4386.96 | Condition is New, Baltimore Aircoil (BAC) 312178 Vibration Switch, FREE SHIPPING | 99.7% |
![]() | $5151.00 | Condition is New, BALTIMORE AIR COIL 312178 / 312178 (BRAND NEW), shipping cost = $12.90 | 99.7% |

The Baltimore Aircoil BAC 312178 Mechanical Vibration Cut-Out Switch is a crucial component in ensuring the efficient and reliable operation of cooling towers. This switch is designed to protect the motor from damaging vibrations that can occur during the normal operation of the cooling tower fan.
The BAC 312178 is a mechanically-operated switch, meaning it utilizes physical components to detect and respond to vibrations. It is mounted directly to the fan motor or base, allowing it to sense the vibrations produced during operation. The switch has a set point that can be adjusted to accommodate different application requirements, providing flexibility in system design.
The switch consists of a vibration sensing element, a spring-loaded plunger, and a set of electrical contacts. When the motor produces vibrations that exceed the set point, the plunger is pushed against the electrical contacts, causing them to open and interrupt the power supply to the motor. This helps prevent further damage to the motor and prolongs its lifespan.
The BAC 312178 Mechanical Vibration Cut-Out Switch is constructed of durable materials, designed to withstand the harsh environments commonly found in cooling tower applications. It is suitable for use with fan motors up to 7.5 horsepower and features a NEMA 4X rating for protection against water, wind, and other environmental hazards.
Installing the switch is a straightforward process, with clear instructions provided in the product documentation. It can be easily integrated into new or existing cooling tower systems, helping to ensure the reliable and efficient operation of the fan motor.
In summary, the Baltimore Aircoil BAC 312178 Mechanical Vibration Cut-Out Switch is an essential component for protecting fan motors from damaging vibrations in cooling tower applications. Its robust design, adjustable set point, and ease of installation make it a popular choice among cooling tower system designers and operators.
Pros and Cons of Buying Baltimore Aircoil BAC 312178 Mechanical Vibration Cut-Out Switch
The Baltimore Aircoil BAC 312178 Mechanical Vibration Cut-Out Switch is a crucial component for various cooling systems. This switch is designed to protect the compressor from damage caused by excessive vibration. In this analysis, we will discuss the pros and cons of buying this switch to help you make an informed decision.
Pros:1. Protection against Compressor Damage: The primary advantage of this switch is its ability to protect the compressor from damage caused by excessive vibration. By disconnecting the power supply when the vibration levels exceed a certain threshold, the switch ensures the safe operation of the cooling system.
2. Easy to Install: The BAC 312178 switch is relatively easy to install. It is designed to fit most Baltimore Aircoil compressors, and the installation process is straightforward.
3. Durable Construction: The switch is built to withstand harsh conditions, making it suitable for industrial applications. It features a robust design with high-quality materials to ensure long-lasting performance.
4. Cost-Effective: Compared to other vibration control solutions, the BAC 312178 switch is a cost-effective option. It is an affordable solution to protect your compressor from damage caused by excessive vibration.
Cons:1. Limited Compatibility: The switch is specifically designed for Baltimore Aircoil compressors, and it may not be compatible with other brands or models. This limited compatibility may limit its usefulness for those with different compressor brands.
2. Mechanical Design: The mechanical design of the switch may require periodic maintenance. Over time, the mechanical components may wear out, and the switch may need to be serviced or replaced.
3. Lack of Advanced Features: The switch does not offer advanced features such as digital displays or adjustable thresholds. This may limit its appeal for those seeking more advanced vibration control solutions.
Conclusion:The Baltimore Aircoil BAC 312178 Mechanical Vibration Cut-Out Switch is an essential component for those with Baltimore Aircoil compressors. Its ability to protect the compressor from damage caused by excessive vibration makes it a valuable investment. However, its limited compatibility and mechanical design may be drawbacks for some users. Ultimately, the decision to buy this switch will depend on your specific application requirements and budget.
Recommendation:If you own a Baltimore Aircoil compressor and are looking for a cost-effective solution to protect it from vibration damage, the BAC 312178 switch is a solid choice. Its ease of installation, durability, and affordability make it a worthwhile investment for industrial cooling applications. However, if you require advanced features or compatibility with other compressor brands, you may need to explore other options.
Details:
Brand new Baltimore air coil bac vibration cutout switch part number 312178.
specifications maxohvac:
- brand: Baltimore Aircoil
- mpn: 312178
- part type: Switch
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
seller maxohvac:
- # reviews: 811
- city: cumberland, rhode island
- rating: 100.0%
returns maxohvac:
- policy: no returns
offer maxohvac:
- prices: $4386.96–$5151.00
- item condition: New
- best offers: true
- options: ship-to-home
- availability: in stock
- sold #: 15
- in stock #: 2
- started: july 27, 2025
payments maxohvac:
- wallet: google-pay
- other
- credit card: diners-club
shipping maxohvac:
- type: fixed
- class: standard
- carrier: usps
- transit: 4-9 days
- service: usps ground advantage
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