Quality Control

Production & Installation

As product’s quality is our priority, the production of our injector nozzles is very strictly controlled.


The injector nozzles are produced in dust-free workshop. The production steps include pre-heat treatment, post-heat treatment and CNC surface treatment. In each produce process, we strictly check every part’s quality and exclude bad quality parts so as to make sure our products meet usage standard.


Injector Nozzle’s Installation

When install injector nozzle, there are some precautions you need to know:

① Clean the injector injector nozzle in an ultrasonic cleaner for 3-5 minutes before installation, so as to make the stains, dust, rust-proof oil oxides, paraffin base, naphthenic base, intermediate base,salt, lead naphthenate, zinc naphthenate, sodium petroleum sulfonate, barium petroleum sulfonate, calcium petroleum sulfonate, tallow diamine trioleate, rosinamine on the surface of the injector nozzle fall off.


② Use compressed air to clean the cleaning fluid attached to the surface of the injector nozzle after cleaning, and clean it up to the standard of usage. The details are as below:

● When installing the injector nozzle, make sure that each part of injector nozzle can be moved smoothly in it.

● If the injector nozzle is not installed in accordance with the standard, it may cause serious damage to the injector nozzle and injector.


liweinozzle.com has a mature business trading system, and as we all know, good service is one of main reasons to makes long term business cooperation with customers. Therefore, liweinozzle.com  provides services such as replace, repair, refund etc,. to our customers, as well as  6-12 months of warranty for each patch of injector nozzles that sent to our customers. And when you meet product’s quality problem, we will help you to solve it until you are satisfied.