North American Marine Jet Inc. in Benton, AR has recently delivered the last
two units of an 18 TRAKTOR JET-454HT (high thrust) unit contract to Yantai
shipbuilder in China
. The 14-meter steel hull is equipped with twin
TJ-454HT (old name TJI-150) water jet units. The workboat will use in salt
lake mining operation near Golmud, China.
NAMJ's TJ-454HT waterjet was chosen over the standard high speed water jet
manufactures, because of the high thrust per hp, very low maximum shaft rpm
of 950 rpm, and we were able to constructed the units out of steel, so the
units could be welded into the steel hulls. It was very important to the
owner that the waterjets be the same materials as the boats so the
protection and maintenance would be the easier. A standard aluminum jet
would be impossible to protect with the salt content of the water being 10
times that of the ocean. The TJ-454HT is the same waterjet chosen for the 55
Swedish BEB craft over many Scandinavian jet manufactures.
NAMJ has constructed our TJ-454HT out of steel in the past to meet the
needs of our customers. If someone wanted one of our jets in Stainless
steel we could build it for them, it is all about making the customers
They also supplied the TJ-454HT steel waterjets
with an optional sealed grease
lube tail bearing system, due to the high concentrate of debris the TRAKTOR
JETS would be pumping thru the jets. The standard impeller clearance of the
TRAKTOR JET is 3 to 5 times the clearances compare to a high-speed pump.