Manual Navman Diesel Fuel Flow Sensors (page 21 of 39) (English)

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Diesel fuel flow sensor kit Installation and Operation Manual

NAVMAN

Each sensor inlet or outlet requires one or

more fittings to connect it to the fuel line. The

fuel sensor connections are all ¼ NPT taper

thread, fixed female.

The fittings required will vary with where in

the fuel lines the sensors are installed. For a

discussion of the issues involved, see section

7-3-3.

You will need threaded barrel adaptors to suit

the piping on your boat. Because there are so

many different threads and piping sizes around

the world there is no possibility of having all

the adaptors required supplied from Navman.

The Navman fuel sensors are supplied with a

standard ¼ NPT female thread for the inlets

and outlets. Any reasonable marine store,

hydraulic or diesel fitting supply house will have

a selection of threaded barrel adaptors that will

have ¼ NPT male thread on one end, and the

appropriate thread for your particular boat on the

other. It is preferable to use ¼ NPT thread, but

if necessary a ¼ BSP male threaded fitting will

fit in a ¼ NPT female thread.

There are many types of pipe and pipe fittings,

and it can get very confusing. If you are wanting

adaptors to fit a particular fitting on your boat, if

6-3 Sensor fittings

at all possible remove that fitting from the boat

and take it into the fitting store. It will save a lot

of time and doubt. Be sure to cover the exposed

ends of the pipes and fittings on your boat to

prevent dirt entering, and make allowances

for some fuel that may well drip from the pipes

while you are away at the store.

Frequently the supply line to the engine is larger

in diameter than the fuel return line. Measure

both before you go to get the fittings.

Fuel sensors are often connected to solid

copper pipe with flare joints. Each connection

requires a flare nut to fit the pipe and a barrel

union to connect the flare nut to the sensor.

For example, to connect a 3/8 inch OD pipe to

a sensor requires:

A 3/8 inch flare nut

A 3/8 inch flare to ¼ NPT taper thread

barrel union fitting

You will need to know the diameter of the fuel

pipe (see section 7-2-1). Fitting a flare joint is

described in section 7-4-1. This requires the

use of a pipe cutting tool, a flaring tool, possibly

pipe bending tools, and flare nuts.

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Others manual(s) of Navman Diesel Fuel Flow Sensors

Navman Diesel Fuel Flow Sensors User Manual - German - 34 pages

Navman Diesel Fuel Flow Sensors User Manual - Dutch - 32 pages

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Navman Diesel Fuel Flow Sensors Manual

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