——Manufacturing of Recycled Resin Composite Manhole Cover: Use waste plastic or nylon and fly ash in the molten state to mix and press and shape.
This type of thermoplastic well cover is repeatedly rolled by the vehicle when the temperature is high, and the well cover will gradually produce creep, which causes the middle part of the well cover to continuously sink and fall off, forming a trap.
——Steel fiber reinforced concrete manhole cover production: Concrete manhole cover after transformation results. However, due to the material, it is very brittle and has weak strength. Although soft steel fiber is added, the bearing capacity of the manhole cover is still not strong, resulting in defects such as fragility, bulkiness, difficulty in opening, and rough appearance.
- BMC molded manhole cover production: unsaturated resin is mainly used as material, filled with calcium carbonate materials.
The rebar is a metal material, while the BMC is an organic material. The coefficient of thermal expansion of the BMC is twice that of the rebar. Due to the rust on the surface of the rebar, the interface between the BMC and the BMC is not firmly bonded. When the temperature changes, the rebar and BMC materials are changed. The interfacial interface will form stress, and the repeated rolling of the vehicle will cause the separation of the reinforcing steel and the BMC interface, and eventually the manhole cover will lose its bearing capacity.
Composite well covers made of polymer composites do not have recycling value. Composite manhole cover can effectively prevent the cover from being stolen. The service life is as long as 20 years. The low price is a good choice.
pressure transmitter is a device that converts pressure into a pneumatic signal or an electric signal for control and remote transmission. Pressure Sensor can convert the physical pressure parameters such as gas and liquid felt by the load cell sensor into a standard electrical signal (such as 4~20mADC, etc.), to supply secondary instruments such as indicating alarms, recorders, regulators, etc. for measurement and indication and process regulation.
Pressure transmitters are used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemical, oil wells, electric power, ships, machine tools, pipelines and many other industries.
There are two types of pressure transmitters: electric and pneumatic. The uniform output signal of the electric type is a direct current signal such as 0-10mA, 4-20mA or 1-5V. The unified output signal of the pneumatic type is the gas pressure of 20-100Pa.
Pressure transmitters can be divided into force (torque) balance type, capacitive type, inductive type, strain type and frequency type according to different conversion principles.
Our advantageous products are mainly compact pressure transmitters, pressure transmitters with display, differential pressure transmitters, wind pressure transmitters, etc.
The main advantage
1. The pressure transmitter has the characteristics of reliable operation and stable performance
2. Dedicated V/I integrated circuit, less peripheral components, high reliability, simple and easy maintenance, small size, light weight, and extremely convenient installation and debugging;
3. Aluminum alloy die-casting shell, three-terminal isolation, electrostatic spray protection layer, durable;
4. 4-20mA DC two-wire signal transmission, strong anti-interference ability and long transmission distance;
5. LED, LCD, and pointer three kinds of indicator heads, the on-site reading is very convenient. Can be used to measure viscous, crystalline and corrosive media;
6. High accuracy and high stability. In addition to the imported original sensor that has been corrected by laser, the comprehensive temperature drift and nonlinearity of the whole machine within the operating temperature range are finely compensated.
Pressure Transmitter,Pressure Transducer Sensor,Digital Pressure Sensor,Pressure Transmitter 4-20Ma
Wuxi Winsun Automation Instrument Co., Ltd , https://www.jswxwinsun.com