Henan Dajia Mining Machinery Co., Ltd is specilized in produce, design and install various plants.

The production process contains several steps:

1. Pre-engineering and sales
2. Detailed process design and engineering
3. Manufacturing and purchase of instruments
4. Assembling on site
5. Testing and commissioning
6. Warranty period, operation, service after sales and feedback to improve design

Every step is very important for an optimal and successful final result. 

1. Assembling on site

Delivery of equipment on site, unloading trucks is done together with assembly of the processing plant. This equipment (and payments) are according to the harmonogram in cooperation with the civil works and the construction of the building. A few examples:

• No roof is easy for assembly of heavy elements with a crane.
• A roof is needed to deliver the electrical panels.
• The roof is done on the other side of the building where the assembly is done for security reasons

We need to pay attention on the fact that on this phase people start to see the reality, and often some new idea's are born. A change mostly cost time (and sometimes also money), this freedom is an issue we need to keep in mind during site assembly.

2. Testing and commissioning

When the plant is complete, we test if all signals are arriving to the PLC and if the visualization of the system is correctly working. This is first done without there is fire made in the installation. This step is often called cold testing.

During this phase workers and staff people receive training and learn all different issues on the processing plant by trying it and assisting.

3. Warranty period, operation, service after sales and feedback to improve design

After start up, and a few months of operation other issues will become clear. 

The feedback after 8000 hours operation or more is very necessary to have feedback on design improvements.