Do you know how to inspect the cylinder block of Hitachi excavator?

Inspection of cylinder block of Hitachi crawler excavator:

 

Remove water rust or other impurities on the surface of the cylinder block, remove the liquid sealant on the crankcase installation surface, and clean the cylinder block. Note: Do not damage the cylinder block.

 

1. Check for cracks

 

Perform color inspection and hydraulic (pneumatic) testing. If cracks or other damage are found, replace the cylinder block.

 

2. Cylinder block wear measurement

 

(1) Check whether the inner surface of the cylinder liner is cracked or damaged.

 

(2) When the cylinder sleeve is in the cylinder block, measure the inner diameter of the cylinder liner at the most severely worn part at a distance of 15-20 mm from the top of the cylinder liner. If the wear exceeds the limit, replace the cylinder liner. Note: Since there is only one specification for the inner diameter of the cylinder liner, there is no need to select the inner diameter grade of the cylinder liner.

 

3. Detection of warpage and deformation of the upper surface of the cylinder block

 

(1) Pull out the cylinder liner to remove the scale on the cylinder block.

 

(2) Use a ruler and a thickness gauge to measure the gap between the 4 sides and 2 diagonals on the upper surface of the cylinder block. Check the upper surface of the cylinder block. If the measured value exceeds the limit, replace the cylinder block.

 

If you are not very clear on how to inspect cylinder block of Hitachi crawler excavator, you can seek help from China Machinery Engineering Machinist.

Small coup to prevent kitchen fumes from leaking-EPP check valve

"Q: Fanxiang, the neighbor next door, will drift to our house once, why does the oil fume drift to our house?"

 

That is because there is no EPP check valve installed in the home !!!

1. What is a check valve

The little friends who have renovated the interior must not be unfamiliar when they hear this word. The biggest function of the check valve is to avoid the backflow of oil and smoke! 

 

Therefore, how can the lampblack be poured back?

 

Because the public flue of the residential area is connected.

 

Like everyone’s residential quarters now, there is a main flue and a secondary flue. The cooking fume from your cooking at home is discharged into the secondary flue according to the flue opening, and then into the main flue, because the temperature of the cooking fume is higher than the outside air. , So it’s very simple to raise the discharge!

 

When the temperature is very hot, or because of the standard pressure, the oily smoke cannot be discharged immediately, and it is lonely and boring in the flue. It is very likely that you want to drop by...

 

The flue EPP check valve is a door of the flue, which is opened when the exhaust system is used, and closed when the exhaust system is not.

 

And when the "door" is not necessarily closed at home, but the "door" is not installed at all, the lampblack thinks, is it coming in? Still come in? So the cooking fume was poured in at home!

 

If you don't like the aroma of other people's rice, add oil fume check valve.

2. Buy check valve

Choosing to install a check valve, then there is a second problem, how to choose a check valve?

✦ Plastic or stainless steel

"Can stainless steel be inferior to plastic? Choose stainless steel!"

"But most people choose plastic, and everyone must have chosen it right"

Indeed, plastics seem to be inferior to stainless steel in terms of durability and layering. But this is not the case!

 

 

The stainless steel check valve does not have a sealant gasket because of the limited processing technology.

 It is airtight, and it is not as good as a plastic check valve. The oil fume will flow back after a long time.

The check valve hangs so high, and there is no need to restrict stumbling. The tightness is the last word, so choose a plastic check valve!

✦ Are all plastic check valves the same?

Even all plastic is good or bad. The key materials of plastic check valve are: PE, PC, ABS, PP.

Value for money to inferior: PC> ABS> PP> PE; ABS and PP currently on the market are more usable.

✦ Specification selection

It's not easy to have friends, don't buy blindly according to the specifications? If so, then consider buying a  experience!

The general specifications of the flue check valve are 15cm, 16cm, 18cm, immediately take a straightedge and measure your flue opening!

3. Check valve pp material manufacturer

How to choose a reliable plastic manufacturer is also one of the most concerned things.

Here I would like to recommend a supplier of EPP raw material manufacturer——Wuxi Hi-Tec Environmental Material Co., Ltd. (HTEC).

HTEC is a national emerging company specializing in the development, design, manufacturing and molding of advanced foamed polymers.

It is an outstanding leader in the domestic EPP plastic industry.

Enzyme Cultivation——Paragon-Bio

Enzyme cultivation is the most important technique for the manufacturing of different enzymes.

 

When fermentation on appropriate substrates is done, both fungus and bacterial microbes are required for the precious collection of enzymes.

 

Enzyme production can be together performed by submerged and SSF.

 

Bacterial enzyme production commonly implies SmF method because it requires high water potential. In fungus, where less water potential is required, SSF method is applied.

 

In the world, 75% of the industries are using SmF for the production of enzymes. The major reason of using SSF is that it does not support genetically modified organisms (gmo) to the extent to which SmF does, so Paragon prefer SmF rather than SSF.

 

One more reason of using SmF is that it has lack of paraphernalia as related to the cultivation of variety of enzymes using SSF. The microorganism is dissimilar in SmF and SSF by the detailed metabolism display that’s way this is highly critical process.

 

Here, influx of nutrients and efflux of waste substance is carried out in different metabolic parameters of cultivation. Some small variation from the particular parameters will affect the undesirable product.

 

Bacterial Enzymes

 

Cellulose, amylase, xylanase, and L-asparaginase are some well know enzymes produced from bacteria.

 

Previously Paragon have thought that SmF is one of the best ways to produce enzyme from bacteria.

 

Current studies have shown that for bacterial enzyme production SSF is more capable than SmF. The most important explanation can be given by metabolic differences. In SmF system, lowering of enzyme activity and production efficiency is done by gathering of different intermediate metabolites.

 

Fungal Enzymes

 

Paragon has isolated many Aspergillus spp. from this process, which is industrially important for enzyme production. This fungus has been a well-known model of microorganism for the production of fungus enzyme.

 

Aspergillus is one of the largest sources of fungal enzyme. The common difference between SSF and SmF are straight lying on the productivity of the fungus. Using SmF, phytase is extracted from Thermoascusauranticus

Enzyme Cultivation——Paragon-Bio

Enzyme cultivation is the most important technique for the manufacturing of different enzymes.

 

When fermentation on appropriate substrates is done, both fungus and bacterial microbes are required for the precious collection of enzymes.

 

Enzyme production can be together performed by submerged and SSF.

 

Bacterial enzyme production commonly implies SmF method because it requires high water potential. In fungus, where less water potential is required, SSF method is applied.

 

In the world, 75% of the industries are using SmF for the production of enzymes. The major reason of using SSF is that it does not support genetically modified organisms (gmo) to the extent to which SmF does, so Paragon prefer SmF rather than SSF.

 

One more reason of using SmF is that it has lack of paraphernalia as related to the cultivation of variety of enzymes using SSF. The microorganism is dissimilar in SmF and SSF by the detailed metabolism display that’s way this is highly critical process.

 

Here, influx of nutrients and efflux of waste substance is carried out in different metabolic parameters of cultivation. Some small variation from the particular parameters will affect the undesirable product.

 

Bacterial Enzymes

 

Cellulose, amylase, xylanase, and L-asparaginase are some well know enzymes produced from bacteria.

 

Previously Paragon have thought that SmF is one of the best ways to produce enzyme from bacteria.

 

Current studies have shown that for bacterial enzyme production SSF is more capable than SmF. The most important explanation can be given by metabolic differences. In SmF system, lowering of enzyme activity and production efficiency is done by gathering of different intermediate metabolites.

 

Fungal Enzymes

 

Paragon has isolated many Aspergillus spp. from this process, which is industrially important for enzyme production. This fungus has been a well-known model of microorganism for the production of fungus enzyme.

 

Aspergillus is one of the largest sources of fungal enzyme. The common difference between SSF and SmF are straight lying on the productivity of the fungus. Using SmF, phytase is extracted from Thermoascusauranticus

Oligomerization service manufacturer-General Biosystems

As a DNA oligomerization service company and manufacturer, General Biosystems can synthesize DNA oligonucleotide libraries according to customer requirements.

General Biosystems is a biotechnology company based in the United States. It is keen to understand how genetic information is stored and programmed in DNA and how it can be used to guide various biological processes. With this knowledge, it can develop innovative technologies and tools to program and physically write or print new genetic codes. 

 

The new regulations will constitute a blueprint for new or improved biological functions and biological systems. These new biological systems will have a wide range of applications and will benefit human life and society in major ways.

 

In the field of synthetic biology, General Biosystems pioneered the use of microchips to economically synthesize oligonucleotide libraries and gene banks, and built the world's first parallel on-chip gene synthesizer. 

They also developed sophisticated software programs to design and optimize complex gene banks and genetic systems.

 

General Biosystems uses these new technologies to bring synthetic biology and biological research into a new era.