PARKER LR20991 Float Switch NH3 R-12 R-22 R-502

( Brand: Parker ), ( Manufacturer Part Number: LR20991 ), ( Part Type: Switch )

Review PARKER Float Switch Type Use Nh3 R-12 R-22

Parker LR20991 Float Switch for NH3, R-12, R-22, and R-502 Refrigerants

The Parker LR20991 Float Switch is a versatile and reliable solution designed for applications involving NH3 (Anhydrous Ammonia) and common refrigerants such as R-12, R-22, and R-502. This float switch is engineered to deliver consistent and accurate level sensing in a wide range of refrigeration systems.

The LR20991 Float Switch features a robust, corrosion-resistant design, ensuring long-lasting performance in harsh environments. The switch is constructed from high-quality materials, including a stainless steel float and a glass-filled nylon housing, to withstand the demanding conditions of refrigeration systems.

The switch operates on a simple principle: as the refrigerant level rises, the float rises with it, completing the circuit and activating an alarm or control device. Conversely, as the level drops, the float follows suit, breaking the circuit. This mechanism allows for precise and real-time level monitoring, enhancing the efficiency and safety of your refrigeration system.

The Parker LR20991 Float Switch is easy to install and maintain. It is designed with a quick-connect system that allows for easy field wiring, reducing installation time and minimizing disruption to your operations. The switch also features a rugged, waterproof design that ensures reliable operation even in wet conditions.

In summary, the Parker LR20991 Float Switch is an essential component for any refrigeration system that uses NH3 or common refrigerants. Its robust design, versatile compatibility, and easy installation make it a reliable choice for a wide range of applications. Whether you're looking to improve the efficiency of your refrigeration system or enhance its safety, the Parker LR20991 Float Switch is an excellent solution.

1. Wide Compatibility: This float switch is designed to work with refrigerants HCFC-22 (R-22), HFC-134a (R-134a), HFC-227ea (R-227ea), and HFC-125 (R-125), as well as HC-290 (R-502), making it a versatile choice for various refrigeration systems.

2. Durable Construction: The float switch is built to withstand harsh environments, ensuring long-term reliability and performance in refrigeration applications.

3. Easy Installation: The float switch is designed for simple installation, reducing the time and effort required for setup.

4. Safety Feature: The float switch helps prevent overfilling or underfilling of refrigerants, which can lead to system failure or potential hazards, thereby enhancing safety.

1. Limited Temperature Range: The float switch is not suitable for extremely high or low temperature environments, which might limit its application in certain refrigeration systems.

2. Potential Vibration Issues: In some cases, the float switch may malfunction due to vibrations, which could lead to inaccurate readings or failure.

3. Sensitive to Dirt and Debris: The float switch can be sensitive to dirt and debris, which might affect its performance. Regular cleaning and maintenance may be required.

The Parker LR20991 Float Switch offers a wide compatibility range, durable construction, easy installation, and a safety feature, making it a valuable addition to various refrigeration systems. However, potential drawbacks include a limited temperature range, possible vibration issues, and sensitivity to dirt and debris. To ensure optimal performance, it is essential to consider these factors and follow proper maintenance procedures.

If you are in need of a float switch for a refrigeration system that uses HC-290 (R-502) or any of the other listed refrigerants, and the temperature range and potential vibration issues are not a concern, the Parker LR20991 Float Switch could be a suitable choice. Regular cleaning and maintenance should be performed to ensure its longevity and proper functioning. Always consult the manufacturer's guidelines for specific installation instructions and recommendations.

Details:

Parker Float Switch LR20991 Type LL For Use With NH3 R-12 R-22 R-502.

part #: lr20991 prices

• $150.00-$775.00

specifications hvaapa:

• brand: Parker
• mpn: Lr20991
• part type: Switch

shipping hvaapa:

• carrier: USPS
• cost: $16.95
• type: Calculated
• service: USPS Ground Advantage
• class: Standard
• transit: 4-9 Days

returns hvaapa:

• policy: No Returns

offer hvaapa:

• sold: 0
• quantity: 1
• availability: In Stock
• options: Ship-to-home
• started: January 19, 2026

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• wallet: Paypal
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general hvaapa:

• HVAC Refrigeration > HVAC Refrigeration: Parts Accessories > HVAC Refrigeration: Controls Circuit Boards
• condition: Used

seller hvaapa:

• city: Puyallup, Washington
• # reviews: 1663
• rating: 98.5%

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