How to connect fire hose couplings?
Hose couplings are used to connect one hose to another and increase overall length of a fire hose. They are attached to each end of a length of fire hose. Hose couplings are also used to connect hose to appliances like hydrants, wyes, and Siamese connections. A variety of mental materials can be used to construct hose couplings depending on the demand of customers. For example, fire brigades prefer the light alloy (hardened aluminum) couplings as they are more flexible, economical, and lightweight. Maritime equipment and suppliers prefer gunmetal and marine brass equipment to prevent salt-water corrosion and increase tolerance to extreme weather conditions. There are three types of hose couplings, including threaded couplings, storz-type couplings, and non-symmetrical quick connect couplings.
Threaded couplings are one of the commonly used in the fire service. They are a male/female set designed for use on most fire hose up to 3 inch in diameter. The male coupling has exposed threads, whereas the female coupling has matching threads inside the swivel. The fire hose has a male coupling on one end and a female coupling on the other end. Because there is a swivel on the female coupling, and therefore the male and female couplings can be screwed together without twisting the hose. Rocker lug coupling and pin lug coupling are known as threaded couplings and they are suitable for use with lightweight lined fire hose.
Storz-type couplings have two halves that are symmetrical. Storz-type couplings are designed for use on all hose sizes. Storz-type couplings are properly aligned together by matching the two halves face-to-face and then turning clockwise one quarter of a turn. Fire departments choose the storz-type couplings for their jobs as they could connect a fire hose to a hydrant when attempting to bring a fire under control and they could connect one coupling to another with an effortless quarter turn. The more common types of storz-type couplings include Storz coupling and Nakajima coupling.
Non-symmetrical quick connect couplings
A set of non-symmetrical quick connect couplings consists of a male coupling and a female coupling. They are attached to each end of fire hose. The male coupling and female coupling can be connected and disconnected quickly without the use of hand tool. There are two types of quick connect couplings we offer including Instantaneous couplings and Machino couplings. A female Instantaneous coupling has two spring loaded plungers for fast attachment to the male coupling. A pair of Instantaneous couplings can be detached by simply pulling the releases. Machino couplings are also easy to connect by pressing male part into the female part. The male and female coupling are connected because the male end presses the clutch jaws inside the female coupling outwards.