The optional float level switch is used to control pumps and valves, which one is more appropriate?

There are two float level switches for you to choose from:

DFYK float rolling liquid level controller is suitable for liquid level control of various pools and water towers, and is especially suitable for automatic water level control and alarm of liquid containing solid or semi-solid floating objects and viscous sewage. As shown in Fig

UQK float level control is suitable for the control of liquid level in open or pressurized vessels in industrial production process. When the liquid level reaches the high and low limit, the relay contact can be used as a switch in the line such as a signal alarm device or an electric pump. As shown in Fig

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

First, the nature is different.

1. Liquid level switch: also known as water level switch, liquid level sensor, is a switch that controls the on/off of the line through the liquid level.

2. Float valve: a valve composed of crank arm and float ball, which can be used to automatically control the liquid level of the water tower or pool.

Second, the functions are different.

1. Liquid level switch: In a water treatment process, there are generally raw water, intermediate water tanks, production water tanks, backwash water tanks, and even waste liquid tanks. The volume is large and small, generally, the production tank, the raw water tank, etc. will be relatively large, especially in the large production line, at this time, it is often necessary to use multiple level switches in the water tank to control multiple levels.

Each liquid level corresponds to different actions, such as the start and stop of the pump, the start and stop of the produced water, etc. Some tanks, although large, do not necessarily require multiple level switches.

2. Float valve: It has the characteristics of simple maintenance, flexible and durable, high accuracy of liquid level control, water level is not disturbed by water pressure, and the opening and closing are tight and no water leakage.

Level Switch: Float Valve:

First, the principle of the two is different:

1. The principle of the liquid level switch: the liquid level measurement is through a mechanical electric shock switch or a voltage-controlled LC oscillator (relying on the controller to detect the change of the oscillation frequency to sense the liquid level height). According to the trial and error and long-term measurements of Minxin microelectronics designers, a large amount of data shows that the above two methods are not suitable for accurate liquid level control applications.

The trend of technological development urgently requires the emergence of pressure sensors with higher accuracy, smaller resolution and more stable performance.

2. The principle of float valve: the float valve adjusts the liquid supply by controlling the liquid level. The flooded evaporator requires the liquid level to be maintained at a certain height, and is generally suitable for the use of float expansion valves.

The working principle of the float valve is to control the opening or closing of a valve by the lowering and raising of the float in the float chamber by the liquid level.

The float chamber is placed on the side of the flooded evaporator, and the upper and lower balance pipes are communicated with the evaporator, so the liquid level height of the two is the same. When the liquid level in the evaporator drops, the liquid level of the float chamber also drops, so the float falls, and the valve opening degree increases by relying on the lever effect, and the liquid supply is increased; Vice versa.

Second, the overview of the two is different:

1. Overview of liquid level switch: liquid level switch, also known as water level switch, liquid level sensor, as the name suggests, is a switch that controls the line on and off through the liquid level.

2. Overview of float valve: The valve composed of crank arm and float ball and other components can be used to automatically control the liquid level of the water tower or pool.

Third, the application of the two is different:

1. Application of liquid level switch: the commonly used non-contact switch is capacitive liquid level switch, and the contact float liquid level switch is the most widely used. Electrode level switches, electronic level switches, and capacitive level switches can also be implemented by contact methods.

2. Application of float valve: floating ball valve is suitable for chemical, petroleum, natural gas, metallurgy, and other industries and hydrogen sulfide-containing media, with many impurities and serious corrosion of natural gas long-distance pipelines.

The liquid level switch is a detection element, which sends a contact signal when the liquid level is detected, and the float valve is a detection plus actuator, and the float valve will be closed when the liquid level required to act is reached.

In terms of use, they are all the same, and they are all used to measure a liquid level.

Whether it is domestic or foreign, the selection is based on the following two points:

1. Whether there is production qualification.

2. Whether or not to obtain relevant honors.

Of course, it can also be decided based on word of mouth.

What you said about the level switch is not accurate enough I have come into contact with the liquid level relay There is a liquid level controller The liquid level relay is mainly for detection with the ability to drive It controls the liquid level amplitude is relatively large and can be stopped at a very high liquid level Start the liquid level controller The control range is the same as the liquid level relay, but it directly or indirectly controls the water pump to start and stop They are all electronically controlled Float valve The liquid level range controlled is relatively narrow The advantage is that there is no auxiliary equipment and no electricity.

The principle is the same, the bottom is connected and the top is disconnected.

The price level is high, and the float is low.

There shouldn't be much of a problem, the main thing is to look at the power of the pump, if the power is too large, use such an intermediate meter.

1: Applicable media (such as clean water, sewage, oil and acid and alkali liquids below medium concentration, respectively, plastic or stainless steel materials are selected).

2: Material: The temperature and pH of different materials are also different, and they need to be selected according to the actual environment.

3: Use temperature, voltage and current, connection method, and outlet material (such as the general plastic float switch is equipped with a low-temperature cable, and the stainless steel material can choose a low-temperature sheath wire or a high-temperature silicone wire).

You can consider the photoelectric level sensor of Shenzhen Nengdian Technology:

Comparison with float level sensors:

1. The liquid level switch is small in size and compact in structure, so the space required for installation is small and the installation process is simple. The existing float type level switch.

Large volume, loose structure, large space required for installation, complex design and installation. The float level switch is driven by the buoyancy of the liquid.

The float of the magnet moves up and down, so that the internal reed tube is turned on and off, so the float has a certain draft, thus the lowest liquid.

There will be a big limitation, and this level switch does not have this limitation.

2. The liquid level switch can be installed up, down, sideways and obliquely, while the existing float type liquid level switch can only be installed up and down.

3. The liquid level control accuracy of this liquid level switch is high, within , and the accuracy of the existing float type liquid level switch is even higher.

4. There is no friction, mechanical moving parts, so the reliability is high, and the float type liquid level switch float is easy to get stuck and cause defects.

5. The head is smooth and easy to clean.

6. Built-in emitting diode and phototransistor, so long life.

7. The live parts are completely isolated from the controlled liquid, without any potential safety hazards.

The float level switch is operated magnetically and has no mechanical connections, making it simple and reliable to operate. When the float switches the floating float of the measured medium, the float drives the main body to move, and the magnet at the other end of the float will control the magnet on the switch action lever.

Float switches do not contain parts that cause failures and bellows, springs, seals, etc. Instead, a straight float is used to drive the internal magnet of the switch, and the simple lever of the float switch makes the switch move instantaneously. The float cantilever angle limit design prevents the float from being vertical.

The position of the control switch can be customized according to the user's needs.

The use of reed switch does not require ** power supply, and the contact life can reach 2 million times. All switch outlets are in the same junction box, and the external construction wiring cost is low. Compared with other types of level switches, the RF type has the lowest unit price.

The enclosures are all protected by IP-65 or above. There are PVDF, PP, PVC plastic materials and SUS304, SUS316 metal materials, so no matter acid and alkali, solvents or various fuels, there are suitable products that can be used. The reed switch is completely isolated from the conductor and liquid, so it is safe to use even on high-temperature and high-voltage equipment.

Linkage float level switch set for high temperature and high pressure applications 60VA dry contact reed switch with choice of normally open or normally closed by float mounting position 316 SS float, conduit and mounting interface for harsh environments American Standard (NEMA 4X) polypropylene housing with rotatable base for easy electrical alignment adjustment Conduit length and switch setpoint size can be customized.

The float liquid level opening and answering type closing is specially used for the liquid level detection, on-site indication signal remote transmission, and liquid level alarm of various small and medium-sized atmospheric and pressurized liquid storage tanks, and can be applied to various hygienic, toxic, corrosive media and high-quality gas hazardous places. There are a variety of installation forms, and Huzhen is suitable for containers in various forms of Qingchai.