What is pin lug?
Pin Lug Hose Couplings are an economical and convenient coupling set for light duty liquid suction and discharge applications. A seal is obtained when the female swivel is threaded completely onto the male, seating at the gasket.
What is a rocker lug coupling?
Hose coupling in which the lugs used for tightening or loosening are semicircular in shape and designed to pass over obstructions.
What is a tail gasket?
The tail gasket forms a seal between the expansion ring and the coupling. A tail gasket is twice as thick as a swivel gasket as can be seen in this picture.
What is the purpose of lugs on a fire hose coupling?
The raised ridges on the body of the male and the swivel of the female are known as rocker lugs. These lugs are engaged with spanners to tighten and loosen the couplings. The notch on the lugs is called a higbee notch or higbee cut (I have also seen it spelled higby).
What is single jacket hose?
A single jacket fire hose has one woven polyester jacket glued to the outside of the rubber liner. A single jacket can protect the rubber liner only if the hose is being used for occasionally light use, a temporary job or on a non-abrasive surface such as grass. Single jacket hose can save cost in the right situation.
What are two types of coupling used in fire service?
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.
Are fire hoses fire retardant?
It seems counterintuitive: fire hoses – the key firefighting tool used by firefighters across the country — are not fire-resistant. Yet the hoses, usually made from woven cotton and rubber, can burn through when they are not charged with water, putting firefighters in grave danger.
What is a double jacket?
A single jacket hose has one cover protecting the inner rubber liner and a double jacket hose has two covers to protect the liner for increased durability and sometimes water pressure rating. A “jacket” is simply a protective cover for the rubber tube and does not actually hold the water.
What is French coupling?
This symmetrical quick connection coupling is used to connect fire hoses, and is available with or without a locking ring. Category: Couplings. This symmetrical quick connection coupling is used to connect fire hoses, and is available with or without a locking ring.
What is a Dutchman in the fire service?
Dutchman — A term used for a short fold placed in a hose when loading it into the bed. This fold prevents the coupling from turning in the hose bed.
What is a pin lug coupling used for?
Pin-lug couplings are used for industrial and commercial applications. They are built of lightweight aluminum with brass pin-lug nut for long lasting durability. Pin-lug style assures strength and reliability. Can be used with hoses capable of handling water or other liquids, providing increased adaptability.
How do you tighten the pin lug on a hose coupling?
The pin lugs can easily be tightened by hand or with a spanner wrench (smaller sizes have lug on female side only). The standard pin lug hose coupling thread is NPSH, which is a straight pipe thread (no taper).
What is the difference between NPSH thread coupling and NPT coupling?
The female NPSH thread coupling will mate with a standard male NPT. The male NPSH pin lug will not mate with a female NPT. NST/NH fire hose thread is also offered in select sizes.