
A4AOSE Comparison
| photo | price | summary | rating |
|---|---|---|---|
![]() | $1699.00 | Condition is New, PARKER OUTLET PRESSURE REGULATOR A4AOSE (3/4 ) XC4 AMMONIA R12 R22 R502 & OTHER, shipping cost = $200.00 | 96.8% |

The Parker A4AOSE Outlet Pressure Regulator is a versatile and reliable solution for regulating the pressure of ammonia refrigerants R12, R22, and R502 in 3/4 inch (19 mm) lines. This regulator is part of Parker's A4 series, which is known for its durability and precision.
The body of the A4AOSE regulator is made of brass, ensuring robustness and resistance to corrosion. The diaphragm is constructed of an elastomer material that is compatible with the specified refrigerants, providing excellent sealing and longevity. The regulator's operating pressure range is from 0 to 150 psi (0 to 10.34 bar), making it suitable for various refrigeration applications.
The A4AOSE regulator features a convenient adjustment knob that allows for simple and accurate pressure adjustments. The regulator's output pressure can be set between 0 and 100 psi (0 and 6.89 bar) with a maximum flow rate of approximately 50 SCFM (1.41 m /min). The regulator also comes with a built-in relief valve that protects against overpressure situations.
Installation of the Parker A4AOSE regulator is straightforward. It comes with a 3/4 inch NPT threaded inlet and a 3/4 inch NPT threaded outlet, allowing for easy connection to refrigeration lines. The regulator also includes a 1/8 inch NPT pressure gauge connection, enabling real-time monitoring of the output pressure.
The Parker A4AOSE Outlet Pressure Regulator is designed to meet the rigorous demands of commercial and industrial refrigeration systems, offering reliable and consistent pressure regulation for your ammonia refrigerant applications.
Pros and Cons of buying a Parker A4AOSE Outlet Pressure Regulator (3/4 in. x C4, for Ammonia R12, R22, R502)
The Parker A4AOSE is a versatile outlet pressure regulator designed for use with various refrigerants, including R12, R22, and R502. Let's explore the potential advantages and disadvantages of purchasing this specific regulator.
Pros:1. Versatility: The Parker A4AOSE is suitable for use with multiple refrigerants, making it a practical choice for those who deal with various refrigerant types.
2. Durability: Parker is a well-known brand in the industry, and their products are generally built to last. The A4AOSE regulator is no exception, and it can handle the rigors of commercial and industrial applications.
3. Easy Installation: This regulator features a simple design and straightforward installation process, which can save time and effort during setup.
4. Accurate Pressure Control: The Parker A4AOSE offers precise pressure regulation, ensuring optimal system performance and efficiency.
5. Leak-Free Connection: The regulator's tight seals and leak-free connection help prevent refrigerant loss and minimize potential safety hazards.
Cons:1. Price: As a professional-grade, versatile regulator, the Parker A4AOSE may come with a higher price tag compared to some other options on the market.
2. Limited Size Options: The A4AOSE is available in a limited range of sizes, which may not cater to every specific application or installation requirement.
3. Complexity: Although the installation process is relatively straightforward, the regulator itself may be more complex than some other, less versatile options.
Conclusion:The Parker A4AOSE outlet pressure regulator (3/4 in. x C4, for Ammonia R12, R22, R502) offers several advantages, such as versatility, durability, easy installation, accurate pressure control, and leak-free connection. However, it also comes with potential disadvantages, including a higher price point, limited size options, and increased complexity.
Recommendation:If you frequently work with various refrigerants and require a reliable, accurate, and durable pressure regulator, the Parker A4AOSE is an excellent choice. Its versatility and precision make it a worthwhile investment for commercial and industrial applications. However, if you have a specific refrigerant type and only require a basic regulator, you may want to consider more affordable options.
Details:
Shipping costs will depend on location. Flanges for threaded pipe and copper tube copper not ammonia. 23-06 stainless steel diaphragm chrome plated pilot seat manual opening stem. See adapted pressure regulator Blu.
specifications maxohvac:
- brand: Parker
- mpn: A4aose
- part type: Pressure Regulator
payments maxohvac:
- other
- credit card: visa
- wallet: google-pay
offer maxohvac:
- options: ship-to-home
- in stock #: 1
- availability: in stock
- price: $1699.00
- item condition: New
- best offers: true
- started: january 4, 2026
- sold #: 10
general maxohvac:
- category: Business & Industrial > Hvac Refrigeration
shipping maxohvac:
- service: flat rate freight
- class: freight
- type: fixed
returns maxohvac:
- policy: no returns
seller maxohvac:
- city: brookshire, texas
- rating: 95.2%
- # reviews: 487
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