LEFOO PRESSURE SWITCH HVAC
A pressure switch controlis a control device that runs a switch on or switch-off action when a preset pressure value occurs. LEFOO low pressure switches and high pressure switches are mainly used as the flow controller for fluid or gas in applications such as HVAC systems, water pumps, boilers, gas tanks. As a pressure switch manufacturer, Lefoo group was launched in 2000, Lefoo manufacture pressure switches for an extensive range of industries include -10000 pa to 10000 pa, and from 0~200 bar. Such as HVAC, refrigeration, air, compressor and pump pressure, automatic water pump, vacuum, steam, differential pressure, float, miniature and vacuum, high pressure, level, and digital switches and sensors to meet the utmost needs of industrial application and harsh environment. Each LEFOO pressure switchis high accuracy with numerous pressure ranges, flexible for any connections.
Digital Pressure Switch
Pressure Range: -100~100kpa
Pressure Accuracy: 1%FSO
Work Temperature: 0~50 °C
Measure media: Non-corrosive dry gas
Output: digital 4~20ma/1~5V, Swith NPN /PNP
Air Compressor Cut Off Switch
Pressure Range: 15~60psi / 40~250psi / 400~500 psi
Stable and accurate pressure switching
Rare metal parts, durable quality
Optimal for heavy duty commercial air compressors
Robust structure for industrial harsh conditions
Differential Pressure Switch
Various Pressure Ranges: 20pa~10000pa
Robust plastic structure
Capable highly customized
Simple installation, easy to adjust
Long service life, accurate and stable
Water Pump Pressure Switch
Pressure Range: 1.5~12.5kgf/square cm
Water-Resistant
Long electrical serve life
High-Pressure Accuracy Switching
Various interfaces and connections
Pressure Gauge LFB
Things you need to know about LEFOO pressure gauge LFB series
LEFOO Mechanical Pressure Switch
Range: 0.2~45Bar(LF08) / 0.5~250 Psi(LF20)
Compact structure,Adjustable Pressure
Good durability: Optional IP67 protection
Multiple series, various connector wiring harness
Suitable for most media and complex working sites
Water Controller
Pressure Range: 1.5~10 Bar
Max current:8A
Compact size, Easy to install
Stable and accurate performance, noiseless
Energy-saving and environmental protection
Water Pressure Switch
(LF42H)Cut in and off Pressure: 1.5bar / 2.5bar
(LF42L) Cut in and off Pressure: 0.1 / 0.2 bar
Good working stability
Excellent durability and pressure resistance
Water supply pressure control for the water purifier
HVAC Pressure Switch
Pressure Range: <16Bar~47Bar
Adjustable Pressure Setting
One-piece interface welded bellows element
Fast rebound function, Low abrasion and Durable
High reliability electrical & mechanical performance
Boiler Pressure Switch
Pressure range: 5-50 psi
Small hysteresis quantity
For boiler system and oil pressure system
316L steel diaphragm, capable of most media
Transparent visual cover, adjustable pressure/scale
Water Solenoid Valve
LEFOO LOW PRESSURE SWITCH HVAC, LEFOO HIGH PRESSURE SWITCH HVAC
A mechanical adjustable pressure switch applies a spring-triggered piston sealed by a diaphragm and rubber O ring. Generally, The spring is the opposing force to the inlet pressure and the spring's pretension is adjusted with a male stud screw by a female screwdriver. People preset a targeted high pressure on the male-threaded stud inside the pressure switch which is subjected to trigger the off switch, and a preset low-pressure value to trigger the switch. For example, in the hot pipeline of an HVAC system, when the compressed high-temperature high-pressure air comes and the pressure rises to an exact value which will trigger the off switch, the spring pretension directly correlates to the pressure at which the switch makes an electric contact. When the pressure drops, the switch resets to its original state and turns on the switch. The low-pressure switch and the high-pressure switch in the HVAC system are two types of basic refrigeration switches in a typical high-taste residential system.
The mechanical pressure switch is better suited for handling high voltages and amperages than an electronic pressure switch. They can be used to make a contact change for an increase or decrease in pressure.
COMMON APPLICATIONS OF THE HVAC PRESSURE SWITCH
HVAC, air compressor blowers, gas cylinders, air compressor cut off switch, generator sets, off-road vehicles, compressors, wafer ovens, process equipment, flow control devices, pumps, wastewater, heating and cooling systems, and numerous other applications from LEFOO pressure controlacross industries.
LEFOO ELECTRONIC PRESSURE SWITCHES
An electronic pressure switch is controlled by the charging signal generated from a pressure sensor, Which is proportional to the pressure. Thus, not only is it identified whether the defined switch point has been reached, but the actual measured pressure is transmitted. Electronic pressure switches often feature a display from which the measured pressure can be read, digital air pressure switch and switching buttons also offer adjustable settings. Switch points, pressure output signals can be individually adjusted to suit the remote monitor control application.
The pros of electronic pressure switches are precise measurement, intelligent remote controllable, The con is the price is much higher than mechanical pressure switch and not suitable for extremely high-temperature high-pressure measurement and applications.
Pressure: It must be able to withstand the maximum working pressure. A diaphragm design works well for vacuum and low-pressure applications. For high-pressure applications, use a piston design.
Temperature: It must be able to work well within its maximum and minimum temperature range.
Repeatability: Repeatability, or accuracy, is the ability of the device to accurately switch back to the same set point for every repetition. The range of accuracy required will determine the selection of the pressure switch for your application. Diaphragm designs generally provide more accuracy than piston designs.
Electronic pressure switches are suitable for automated and controlled equipment systems that require programmable function, digital display, flexibility, accuracy, ingress protection, and stability. Common media used with pressure switches are Hydraulic oil, Heating oil, Turpentine, Petrol/gasoline, Air. The automatic pump control switch for water pump applied to the water system will automatically start and stop the water pump according to the set pressure value.
More kinds of differential pressure transmitter, please visit our website.
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