Among many chemical building materials, new plastic building materials are rapidly developing at home and abroad, and the largest consumption of plastic building materials is plastic pipes.
Plastic pipes and fittings replace traditional cast iron pipes, white iron pipes and cement pipes in buildings. They are widely used in building construction water supply system piping, drainage pipes, exhaust pipes, sewage sanitary pipes, underground drainage pipes systems, rainwater pipes and wire and cable sheathing. tube. This is because plastic pipes have the following advantages over traditional building pipes:
(1) Light weight
The relative density of plastic pipes is only 1/7 of that of cast iron, so the transportation cost of pipes and the labor intensity during construction are greatly reduced.
(2) good corrosion resistance
Plastic pipe was first used in chemical construction, suitable for conveying corrosive liquids, gases, no corrosion, reducing maintenance costs and long life. According to foreign data, the life expectancy of hard PVC can be as long as 50 years.
(3) Smooth pipe wall
The fluid flow resistance is small, and under the same conditions, the plastic flow is 30% higher than that of the cast iron pipe.
(4) Energy saving
Compared with steel pipes, the processing temperature of plastics is lower, so the processing energy consumption is low. According to statistics, the energy-saving effect of producing hard PVC pipes is over 50%.
(5) low price
According to the actual construction and installation statistics, the material cost can be reduced by 20% by using a rigid PVC drainage system.
However, plastic pipes also have the following disadvantages, which limits their application:
(1) Poor heat resistance
Most plastic pipes, such as polyvinyl chloride, polyethylene, and polypropylene, are thermoplastics. Avoid high temperatures when used, otherwise the pipes will be deformed and leaked.
(2) Large thermal expansion coefficient
Corresponding measures should be taken in the design of the piping system, such as installing expansion joints, leaving room for it.
(3) low impact resistance
It is easy to break when impacted, and should be avoided during use.
Mass Flow Meter Batch Controller
Zhejaing Sealand Technology Co., Ltd. is a trustworthy manufacturer of Mass Flow Meter Batch Controller, Batch Controller, Controller, Register & Counter.
A Main functions and features
1. Electronic control and showing filling amount & total automatically; 2. Mass and volume modes are available;
3. Amount/ Total preset function (if with control valve);
4. Data can be saved & re-displayed after power failure;
5. The last 2000 transactions can be saved;
6. Shift total and Inventory total can be calculated;
7. Error code will be shown when fault happens;
8. Over-low protect function;
9. Temperature compensation function;
10. Reasonable structure, easy for maintenance;
11. IC card system & GPRS communication (Optional).
B Main technical data
8-8-6 digit display: 8-digit for amount, 8 for total and 6 for price Environmental temperature: -35oC ~ +55oC
Relative humidity: 30%~90%
Atmospheric pressure: 86kPa~106kPa
Working voltage: 24VDC ± 1V or 220VAV ± 10% Power: 20W
Ex-mark: Ex d e ib IIB T4 Gb
Certificate No.: CCRI 19.1012
Mass Flow Meter Batch Controller, Batch Controller, Controller, Register, Counter
Zhejiang Sealand Technology Co., Ltd. , https://www.sealandflowmeter.com