FIRE FIGHTING FITTINGS AND COUPLINGS
FITTINGS, COUPLINGS
AND CAPS
Coupling is a device used to connect the fire hose to the valve and to the
nozzle.
Adaptors and blank caps are needed in special cases:
adaptors are used to switch from one size to another size or from a
threaded end to a quick connection, while blank caps are used to shut
connections fitted on a fire equipment.
Spanners to allow complete connection of the couplings are designed
according to applicable standard.
Storz Standard
A Storz coupling is a quick connection coupling, commonly used to connect a fire
hose to a fire hydrant.
It is a symmetrical coupling (without male/female part) which is very easy to
connect. This is the standard coupling employed in many countries such as
Denmark, Germany, Austria, Poland, Switzerland, the Netherlands, Greece, Israel,
Portugal, etc...
Once the lugs of the clamp fitting match the slots of the opposite flange
it’s necessary to turn the two flanges each other to ensure tightness of the
connection.
Storz couplings are available in several sizes for delivery and suction operation.
They are manufactured according to the applicable national standard.
AFNOR Standard
A DSP coupling is a self-sealing symmetrical coupling which is secured by inter-
connecting two couplings together.
To get a tight connection a locking ring shall be turned up to stop. In this way
two preformed bosses on the locking ring match the grooves preformed on the
connecting coupling. DSP couplings can be used for delivery operation only.
They are compatible with Guillemin couplings which are used for different
purposes.
They are manufactured according to NF S61-701.
NFPA Standard
National Hose Thread (NH), also known as National Standard Thread (NST) is a
non-symmetrical coupling with male and female part.
It is the most common type of fire hose coupling used in the United States.
They are suitable for delivery and suction operations.
The male and female threads screw together and the connection is sealed with a
gasket.
10 Bocciolone Antincendio · Fire Fighting Equipment