The Sankey D System
In the realm of draft beer, the coupler plays a vital role as the device that connects the gas and beer lines to the keg, enabling the beer to flow from the keg to the tap. There are various types of couplers used worldwide, each with its unique characteristics and compatibility with different keg designs. In the United States, the Sankey D system is the most commonly used, and here's why.
The Role of the Beer Coupler
The beer coupler attaches to the keg valve and acts as a key, twisting into the keg to engage the valve and allow the beer and gas to flow. The coupler has two ports - one for gas (CO2 or nitrogen) to enter the keg, and one for beer to exit the keg. When the keg coupler is engaged, the gas pressure forces the beer up through the coupler and into the beer line leading to the tap.
Sankey D System: A Standard in the U.S.
The Sankey D system is the most widely used keg tap in the U.S. Its design and functionality make it a practical choice for most American beers. It features a single-valve design that is easy to engage, making keg changes quick and straightforward.
The Sankey D coupler connects by twisting onto the keg valve, providing a secure and leak-free connection. Its robust and reliable design reduces the risk of problems such as leaks or difficulty engaging or disengaging the coupler.
Why is the Sankey D System So Common?
There are several reasons why the Sankey D system is the go-to choice for most kegs in the U.S.
Standardization: Many major breweries in the U.S. have adopted the Sankey D system, making it a standard across the industry. This widespread use means that bars, restaurants, and other venues serving draft beer are more likely to have Sankey D system compatible equipment.
Ease of Use: The Sankey D system is straightforward to use, making it a favorite among bar staff. Its design simplifies the process of changing kegs, saving time and effort.
Reliability: The Sankey D coupler is durable and reliable, minimizing issues with leaks or blockages.
Compatibility: The system is compatible with a wide range of American-made beers, providing flexibility for venues that serve a variety of brands.