subject: Heavy Duty Applications Of Hose Adapters [print this page] Hose couplings or adapters are mostly used for joining two hoses or as a connector for a tap or any other hose appliances such as in sprinklers, such as those found in irrigation sprinklers. Although these hose adapters may seem simple, particularly because most people use these for garden hoses, such as the hoselink and hozelock types of hose adapters, other types are used for more sophisticated and heavy duty applications.
Here are other types of hose adapters used for heavy duty applications
Holedall Family of Hose Couplings
There are different types of holedall hose couplings. These include:
Mulconroy
Mulconroy/Holedall Swaged Hose Coupling) is commonly found on larger diameter hoses used in higher pressure applications or where the hose is exposed to higher end pull. Like many other heavy duty hose couplings, these are mostly installed with with special hydraulic ram machinery and special dies.
Holedall IX Internally Expanded or IX
These are used similarly with Mulconroy, which is normally used for higher pressure applications, or where the hose is exposed to higher end pull, or where a full flow is required. They are installed with special hydraulic pull bar machinery using special pull plugs.
Scovilla/Rostra
These types Holedall of heavy duty hose adapters are used primarily on fuel oil hose applications, where a full flow is required. They are installed with special hydraulic pull bar machinery using special pull plugs.
Hose couplings for Fire Hoses
Storz
A Storz coupling is a "quarter turn coupling", or "sexless coupling", commonly used to connect to fire hydrants, easy to connect, no particular male or female end, lugs are on inside of coupling. The standard coupling on fire hoses in Germany.
Nakajima and Machino
These two types of hose couplings are mostly used in Japan. Nakajima is a "quarter turn" or "sexless" coupling while Machino is a quick connect and disconnect coupling used on fire hoses.
Expansion Ring
An Expansion Ring Fire Hose Coupling is commonly used on lay flay fire hose, it has the advantage of providing no flow restriction, as the expansion ring is expanded to match the inner diameter of the hose. They are installed with special machinery using a drawbar expander. In the USA it is most commonly supplied with NST (NH) threads.
NST (National Standard Thread)
National Standard Thread (NST), also known as National Hose thread (NH). The most common type of fire hose coupling used in the USA. The male and female straight (non-tapered) threads screw together and the connection is sealed with a gasket.
