What is Fuel Nozzle Holder Assembly?

A fuel Nozzle Holder is a device that is used to secure fuel nozzles in place during fueling operations. They are commonly used in fuel dispensing systems at gas stations, airports, and other locations where fuel is distributed.
Fuel nozzle holder.
Fuel nozzle holder.


In this article, I will discuss the fuel Nozzle Holder.


Table of Contents

Nozzle holder

Nozzle holder.
Nozzle holder


Many different fuel Nozzle Holder is available, each designed for specific fuel nozzles or fuel systems. Some holders are made from durable metals like stainless steel or aluminum, while others are made from plastics or other materials.
To locate the nozzle in the correct position in the engine cylinder head, specifically designed Nozzle Holders are provided. This carries a valve spring and a spindle through which the compression on the spring can be adjusted by the compression screw, thus the pressure at which the nozzle valve is forced off its seating can be regulated. At the lower end of the holder is a highly finished face that forms a joint with the flange of the nozzle body when tightened using the nozzle cap nut. 
Oil is fed through the piping connected to the fuel inlet connection via a boring in the Nozzle Holder which connects with an annular semi-circular groove on the ground face of the nozzle body. The slight leakage of oil accumulating within the Nozzle Holder is sufficient to lubricate the nozzle and can be led away via a pipe fitted to the leak-off connections. 
The service life of the valve spring can be increased by careful treatment. To avoid damage likely to be caused by moisture corrosion during storage, handling, or condensation due to temperature changes in service, it is recommended that these springs are inspected, cleaned, and greased whenever the nozzles are removed. 

Nozzle holder assembly

Nozzle holder assembly.
Nozzle holder assembly.


When preparing to fit a Nozzle Holder into the cylinder head, care should be taken to see that the special copper washer is provided to make the joint between the nozzle cap nut and the cylinder head. No washer is required when engines have an integral copper face in the injector pocket. This joint washer should be an easy but not loose fit for the nozzle body and as this is quite an important feature, on no account should normal sparking plug washers be used.

The metal of the cylinder head, the faces of the copper joint washer, and the face of the nozzle cap nut should be cleaned in order to facilitate the making of a leak-proof joint. It is also advisable to fit a new joint 
washer whenever the Nozzle Holder is replaced after having been removed for cleaning.

When fitting the Nozzle Holder in position, care should be taken to see that it is an easy fit in the cylinder head tunnel and on the holding-down studs, so that it can be placed down on the copper joint without force of any kind. If the nozzle end seems tight in the injector pocket, the pocket should be tightened down evenly in order to prevent the nozzle from being canted and so “nipped ” in the cylinder head. This is very important, since any unevenness in tightening down may cause distortion of the nozzle and subsequent failure of the latter. 

In conclusion, fuel Nozzle Holders are a critical component of any fuel dispensing system. They provide a safe and secure way to hold fuel nozzles in place during fueling operations, helping to prevent spills, leaks, and accidents. There are many different types of fuel Nozzle Holders available, each designed for specific types of fuel nozzles or fuel systems. Investing in high-quality fuel Nozzle Holders can provide significant benefits in terms of safety, reliability, and overall efficiency.
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