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　　O-rings are widely used in various industries for sealing purposes. They are circular rubber rings that are designed to fit into a groove and create a seal between two parts. O-rings come in different sizes, materials, and colors. While the size and material of an O-ring are crucial factors to consider, many people wonder if the color of an O-ring has any significance. In this article, we will explore this question and shed light on the importance of O-ring colors. 　　Firstly, it is important to note that the color of an O-ring does not have any direct impact on its functionality or performance. The primary purpose of an O-ring is to create a reliable seal, and this is determined by its size, material, and the design of the groove it fits into. The color of an O-ring is simply a visual characteristic and does not affect its sealing capabilities. 　　However, the color of an O-ring can be used as an indicator for specific applications or materials. In some industries, different colors are used to differentiate between O-rings made from different materials. For example, black O-rings are commonly made from nitrile rubber, which is known for its resistance to oil and fuel. On the other hand, red O-rings are often made from silicone rubber, which has excellent resistance to extreme temperatures. By using different colors, it becomes easier for technicians and engineers to identify the type of O-ring required for a particular application. 　　In addition, the color of an O-ring can also indicate its hardness or durometer. Durometer is a measure of the hardness of a material, and O-rings are available in different durometer ratings. For instance, blue O-rings are typically softer, while green O-rings are harder. By using different colors to represent different durometer ratings, it becomes simpler to select the appropriate O-ring for a specific sealing application. 　　Furthermore, the color of an O-ring can be used as a visual quality control indicator. During the manufacturing process, O-rings undergo various quality checks to ensure they meet the required standards. By assigning different colors to O-rings that have passed these quality checks, it becomes easier to identify and separate them from those that have not. This visual indicator helps in maintaining quality control and ensuring that only properly manufactured O-rings are used in critical applications. 　　While the color of an O-ring does not directly affect its functionality, it can serve as an indicator for specific applications, materials, hardness, and quality control. Different colors can be used to differentiate between O-rings made from different materials or with different durometer ratings. Additionally, assigning colors to indicate quality control helps in ensuring that only properly manufactured O-rings are used. Therefore, while the color of an O-ring may not have a significant impact, it does have some practical uses in certain industries.

Minimum Order: 500

Engine didactic bench for automotive training equipment, it’s suitable for university, college, vocational training centers, technical schools, polytechnics. 1.The use of Toyota Corolla inline four cylinder multi-point EFI engine 2.The engine working normally and operating smoothly 3.The real-time display for various voltage of sensors by a digital voltmeter 4.The real-time display for fuel pressure, oil pressure in different working conditions 5.The real-time display for vacuum; and the LED display for spray pulse and throttle percentage 6.Fault simulation sets for the student’s exam 7.Weight :350kgs

1 Product Overview 1.1 Profile This system can simulate the process of industrial safety electricity system, so that students can have an initial intuitive understanding of industrial safety electricity. To cultivate the students' corresponding knowledge and skills, suitable for the teaching and skills training assessment of higher vocational colleges, vocational schools, secondary vocational schools and technical schools. 1.2 Feature (1) training platform adopts aluminum frame type structure, measuring instrument and load module uses the way of hanging box installation, training power built-in integrated installation, each unit with flexible, easy to use, not easy to damage. (2) the experimental circuit and devices are fully configured and can be used in combination to complete the training contents of a variety of subjects. (3) the training platform has a good security system.

The system can simulate the process of grounding system, so that students can have a preliminary intuitive understanding of the grounding system, and be familiar with the composition, connection and operation principle of the grounding system. To cultivate the students' corresponding knowledge and skills, suitable for the teaching and skills training assessment of higher vocational colleges, vocational schools, secondary vocational schools and technical schools. 1.2 Feature (1) training platform adopts aluminum frame type structure, measuring instrument and load module uses the way of hanging box installation, training power built-in integrated installation, each unit with flexible, easy to use, not easy to damage. (2) the experimental circuit and devices are fully configured and can be used in combination to complete the training contents of a variety of subjects. (3) the training platform has a good security system.

1 Product overview 1.1 Profile This system can simulate data wiring process, make the students to have a intuitive understanding on data cabling system, trains the student to the corresponding knowledge and skills, suitable for, higher vocational colleges, secondary vocational schools and vocational school related professional teaching and skills training examination. 1.2 Feature (1) Aluminum profile frame structure is adopted to facilitate the installation of devices. Each unit is flexible and easy to use and not easily damaged. (2) Rhe experimental devices are fully configured and can be used in combination to complete a variety of training contents.

The System Should Cover the Following Training Objectives: Study of basic principle of operation of a gear pump Recording of pump characteristics Investigation of relationship between head and speed Influence of pressure limitation Determination of efficiencies Minimum Technical Specifications Required (like or better than): Closed oil circuit Needle valve for modifying the flow rate Overflow valve for head adjustment Should include sensors for temperature and pressure at inlet and outlet of the pump Oval wheel meter act as flow sensor Integrated microprocessor-based instrumentation Gear pump with speed controlled drive its power consumption: 370W, nominal speed ranges from 100 to 750 rpm, maximum flow rate of 32cm³ per revolution and maximum head of 80m Overflow valve: 0 to 5.5bar

The System Should Cover the Following Training Objectives: Study of principle of operation of a piston pump Recording of pump characteristics Study of pressure curves of delivery pressure and cylinder pressure Effect of pulsation damping Investigation of P-V diagram Determination of efficiencies Minimum Technical Specifications Required (like or better than): Closed water circuit system Should include frequency converter to adjust the speed of piston pump Transparent water tank Needle valve for adjusting the flow rate Adjustable head via overflow valve: 0.2 to 2bar Pulsation damping of the head using air vessel with bleed valve Sensors for pressure at outlet and in the cylinder of the pump, flow rate and crank angle Integrated microprocessor-based instrumentation

The System Should Cover the Following Training Objectives: Visualization of cavitation effects in a transparent pump Investigation of formation of cavitation Familiarization with cavitation influence Influence of speed, inlet pressure, flow rate and temperature on cavitation Minimum Technical Specifications Required (like or better than): Should include transparent pump housing and pipe at the inlet side Open impeller to observe the blades during operation adjustable pump speed using frequency converter Temperature control should be via heater and external cooling should be via water supply Rotameter for flow measurement Should include manometers to display of the pressures at inlet and outlet side of the pump Digital display of speed, water temperature in the return and flow rate Closed water circuit Centrifugal pump with drive motor of power consumption: 0.35kW, speed: 520 to 3250rpm maximum flow rate: 60L/min and maximum head: 14m Tank: 20L heater: 2kW inlet pressure measuring range: -1 to 0bar outlet pressure measuring range: 0 to 1.5bar

Fonction (s)/Objectifs pédagogiques Use of enthalpic air diagram Characterization of humidification and dehydration phenomena in an air conditioned environment Description : Autonomous unit, monoblock, mounted on mobile support frame, treated against oxidation, PVC panel. Digital display of temperatures from suitable probes for dry and wet temperatures, paper output of results in the form of curves. 1 fan motor assembly, equipped with a manual speed controller . 1 conduct of blowing Including : 1 water vapour injector 1 electric heating battery, regulated temperature and adj

1. Description The wiring of electrical components for the start and operation of refrigerant compressors is a typical task in the field of refrigeration. Safety aspects also play an important role. With SR 171 this knowledge and these skills can be acquired. All components are operated and tested with mains voltage to provide high relevance for practice. The electrical components for the start and operation of the refrigerant compressor are arranged clearly visible. The electrical connection of the individual components is made with cables via the lab jacks. The components are e.g. the capacitor and startup relay necessary to start the motor. The circuit diagram on the front panel enables the easy allocation of the individual components. The refrigeration circuit with compressor and receiver enables the checking of the pressure switches on the intake and delivery side of the compressor. The pressure is set via valves and the pressure switch tripped. Two manometers enable the monitoring of the pressure curve. If one of the pressure switches trips, the current supply to the compressor is interrupted. The wiring and checking of other typical components of the safety chain, e.g. circuit breaker and automatic fuse, is also carried out.

Technical Specification • Refrigerant: R134a • Hermetically sealed compressor: • Water cooled condenser through Plate heat exchanger • Condenser cooling fan not required. • Water cooled evaporator via Plate Heat Exchanger with submersible pump • Variation of flow through plate Heat Exchanger • Thermostatic Expansion valve: Danfoss TN2 Internally equalised valve • Refrigerant flow measurement: Rotameter, Range: 938 Litres/min calibrated for 134A • Hand shut off valves are not necessary because it is a sealed system. • No filter dryer necessary as it is a sealed system • Bourdon Pressure Gauge: 025Bar • Bourdon Compound Gauge 010Bar • HP/LP CUTOUT: Low Pressure 2 Bar/ High Pressure 16 Bar • 24V DC Speed controller on compressor with integral power measurement on PC • Electrically isolated • No digital display. PC display required. • USB computer connectivity

Pneumatic and electropneumatic dynamometer Double sided mobile workstation allows mounting and operation of different components without tool use (components equipped with quick mounting system)

a.FMS complete system 1 set contain A-storage station B-mechanical maintenance station C-assembly and quality control station D-PLC station E-tray tracking station F-management station Storage station Cartesian robot 36 storage units PLC control station Aluminum profile frame

　　What seals can be used in rotating shafts? This question arises when considering the various options available for effectively sealing rotating shafts. The selection of the appropriate seal depends on several factors, including the nature of the application, the operating conditions, and the desired level of sealing performance. 　　One commonly used seal for rotating shafts is the lip seal, also known as a radial shaft seal. Lip seals consist of a flexible lip that is in contact with the rotating shaft, creating a barrier to prevent leakage. The lip can be made of various materials, such as rubber or polyurethane, depending on the specific application requirements. Lip seals are often suitable for low to moderate rotational speeds and can effectively seal against liquids and gases. 　　Another type of seal frequently used in rotating shafts is the mechanical seal. Unlike lip seals, mechanical seals do not rely on direct contact with the shaft. Instead, they employ a combination of rotating and stationary components to create a dynamic seal. Mechanical seals are particularly effective in high- speed applications or those involving hazardous fluids. They provide a higher level of sealing performance and are often used in pumps, compressors, and other industrial machinery. 　　In certain demanding applications, labyrinth seals are preferred due to their ability to withstand high pressures and extreme operating conditions. Labyrinth seals consist of a series of interlocking stationary and rotating components, creating a tortuous path for the fluid or gas to navigate. This design effectively prevents any leakage, making labyrinth seals suitable for applications such as turbines, engines, and gearboxes. 　　For applications that require a high level of cleanliness and hygiene, such as food and pharmaceutical industries, sanitary seals are commonly used. These seals are made from materials that meet strict regulatory requirements and are designed to prevent the accumulation of contaminants. Sanitary seals often incorporate features such as smooth surfaces and easy disassembly for cleaning and maintenance purposes. 　　It is important to consider the operating conditions when selecting the appropriate seal for a rotating shaft. Factors such as temperature, pressure, and the presence of abrasive or corrosive substances can impact the performance and longevity of the seal. In some cases, custom seals may be necessary to meet specific requirements or to address unique operating conditions. 　　Selecting the most suitable seal for a rotating shaft depends on various factors, including the specific application, operating conditions, and desired sealing performance. Lip seals, mechanical seals, labyrinth seals, and sanitary seals are all commonly used in different industrial settings. By carefully considering the requirements and consulting with experts, it is possible to identify the optimal sealing solution for any rotating shaft application.

Minimum Order: 100