The purchase rate of smart water meters in the market is steadily increasing. However, as smart water meters are used for longer periods, they tend to accumulate some dirt and grime. This buildup of dirt is one of the key factors contributing to metering inaccuracies and also detracts from the meter’s neat and aesthetically pleasing appearance.

Next, we’ll show you how to clean a water meter that’s covered in dirt.

1. If it’s a water meter at home, you can open the meter cover to clean the dirt off the meter glass and dial.

2. If the water meter is managed by the municipal water company, you can call their customer service hotline and hand over the issue to the water company for handling.

3. The water meter is corrosion-resistant and can be disassembled by yourself. If there’s a problem, contact the tap water supplier for replacement or repair.

4. Avoid damage to the water meter caused by acidic or alkaline substances, and take appropriate moisture-proof measures in humid environments.

5. If there’s no professional personnel nearby, absolutely do not remove the lead seal on the water meter. Only qualified maintenance personnel can accurately identify the location of the problem to prevent unnecessary damage.

Like the electronic devices we use every day, smart water meters also require maintenance and regular cleaning. Otherwise, various issues could arise and affect their performance.

What should you do if your water meter isn't frost-proof in cold winter weather? The following methods may be helpful to you.

1. Check whether the water meter can be installed indoors. Water meters are typically installed outdoors. However, if the water meter suffers severe damage due to freezing during winter, you might consider installing it indoors to reduce losses caused by freezing.

2. Water meter heating bags—keep your water meter warm. These electric heating bags for water meters are heated by a 220V power supply and can be wrapped around the water meter to prevent it from freezing.

3. Bury the water meter in visible soil. In winter, the ground temperature is still higher than the air temperature; therefore, the water meter can be buried in loose soil to prevent freezing.

4. You can also start with the material of the water meter itself. It’s recommended to choose a water meter material that’s more frost-resistant, which will help protect the meter from freezing and damage during winter.

5. For owners whose properties are unoccupied, we recommend returning once a week to check whether the tap water has frozen as temperatures drop.

6. If your water meter freezes and starts leaking, please promptly call the municipal water company for repairs. Take simple measures to address the situation on-site to prevent ice formation in the hallway, which could lead to falls and injuries. You can also notify the property management to request their assistance in clearing any accumulated water!

Smart water meters are becoming increasingly widespread, and as old models are phased out in favor of smart ones, traditional water meters are being retired. Although smart water meters are convenient to use, they can still encounter certain issues. Below, we’ve listed the most common types of malfunctions and provided solutions for each.

Frequently Asked Question 1: The smart water meter is rotating.

For example, if you notice the water meter spinning, promptly turn off the main valve. This is usually caused by unstable gas or water pressure within the pipes. Additionally, there are often cases where the battery has run out of power. If the water meter doesn't display any readings prominently, it’s a clear sign that the battery is dead or the meter itself is malfunctioning. We need to contact the water supply management department promptly to arrange for a replacement at home, thus avoiding various inconveniences caused by water outages.

FAQ 2: Top up funds, but the valve doesn't open when swiping the card.

Of course, a common malfunction of IC-card smart water meters is that the valve fails to open when the card is powered on. If the card doesn't respond during recharging, you should pause for a few seconds before removing the IC card—there's no need to issue the command to open the valve and resume normal water supply. The above are the typical malfunctions I encounter with IC-card smart water meters. I hope you won't panic if you run into these issues. You can coordinate with the relevant authorities to resolve the problem, or you can directly contact the smart water meter manufacturer’s after-sales service hotline for advice.

FAQ 3: The card cannot read information.

Many smart water meters equipped with IC cards rely on inserting the card to read and input information. When the card slot is exposed, foreign objects can easily enter it. As a result, users often complain that the water meters are difficult to use. To address this issue, it’s crucial to pay extra attention to ensure that there are no foreign objects in the card slot. If you spot any, clean them up promptly to keep the card slot clean and free of debris.

FAQ 4: No information about purchasing water was provided.

This phenomenon could be due to the card being inserted in the wrong position or being removed too quickly. When you insert the card, make sure it’s properly aligned. Please carefully check whether the card in your hand is inserted correctly, and wait until the data has been successfully written before removing it. If the data still fails to write, please go to the water bill department to verify whether the recharge has been processed successfully. If the issue lies with the meter itself, it will need to be sent back to the manufacturer for repair.

FAQ 5: Symbols indicating similar errors are displayed on the table.

In this situation, as long as your card is valid, the usual procedure is to replace the meter. In enterprise management, the process goes like this: replace the meter—read the card—enter the balance—write the balance onto the card. After that, it’s perfectly normal to swipe the setup card before swiping the user’s card. If none of the above methods works, check whether the water supply to the pipeline has been shut off. If not, and if the watch itself is broken, then you’re fully justified in asking them to replace it with a new one.

The five common faults and their solutions are outlined above. We hope this information is helpful to you—stay tuned for more details. Chengde Longzhida Instrument Technology Co., Ltd.

What is a mixing valve used for? The Chengde Longzhida mixing valve is an intelligent product with a high safety factor, developed under a national patent. It’s specifically designed for public bathhouses to mix hot and cold water in showers, ensuring constant water temperature and pressure and preventing sudden fluctuations in water temperature from the very source. Six different models are available, namely HSZ-10, HSZ-20, HSZ-30, HSZ-50-BP, HZS-100-BP, and HSZ-150-BP. The smallest model can accommodate up to 20 shower heads, while the largest model can handle as many as 300 shower nozzles—more than any other similar product currently available in China. For more information, please contact Manager Qiu at 15343144268 to find out which mixing valve is best suited to the number of shower heads in your bathhouse.

The temperature control accuracy of this mixing valve is 0.5℃. If you’re familiar with mixing valve products and have conducted market research, you’ll know that the Chengde Longzhida mixing valve model boasts the highest temperature control accuracy among domestic mixing products.

Key Features: Each mixer is equipped with N sets of water temperature control systems. Each set of the mixer’s temperature sensor, automatic valve, and water temperature controller functions as an independent operational unit, completely free from interference and serving as mutual backups. When one set of operational units in the mixer fails but the outlet water temperature has not yet reached the user’s preset value, the next set of operational units will automatically take over and start working. Thus, even if one or two sets of operational units fail during use, the mixer’s remaining units can continue to operate independently and normally, persisting in their function and adjusting the water temperature precisely to the user’s preset value. This mixer model can supply sufficient constant-temperature bathing water to up to 300 showerheads per unit. Additionally, this mixer product can be fitted with a stainless steel casing and an observation window, which not only enhances its aesthetic appeal and elegance but also makes installation, operation, and maintenance simpler and safer.

After reading the introduction provided by our editor, you should have a good grasp of “What does a mixing valve do?” Chengde Longzhida mixing valves offer a complete set of design and installation solutions for bathroom shower systems, ensuring that once you purchase and install a mixing valve, you’ll enjoy consistently stable water temperatures. Chengde Longzhida mixing valves also provide a comprehensive after-sales service system. If you’re located in the Chengde area, feel free to pay us a visit. For customers outside the Chengde region, please contact Manager Qiu in our online sales department by phone: 15343144268 Welcome to shop!

Where can I find a manufacturer of thermostatic mixing equipment? — Hebei Chengde Longzhida Intelligent Instruments & Meter Technology Co., Ltd. is a modern high-tech enterprise integrating manufacturing, software development, product integration, and information services. The company primarily focuses on the R&D, production, and sales of intelligent control and data transmission systems for energy and water conservation. It has collaborated with Peking University, Tsinghua University, Beijing University of Aeronautics and Astronautics, research institutes in Taiwan, and others to develop intelligent thermostatic and constant-pressure mixing equipment with independent intellectual property rights. This equipment achieves energy and water savings of over 50%, filling a gap in China’s bathroom mixing technology sector and establishing the company as the industry leader in precision control of water temperature and mixing.

A thermostatic mixing device is a mechatronic apparatus that uses temperature sensors to detect water temperature, a microcomputer for precise control, and solenoid valves for actuation—automatically adjusting the water temperature to reach the preset target value. This device is suitable for bathhouses (rooms) in government agencies, organizations, enterprises, and public venues, as well as industries such as chemical processing, textile dyeing, and others that require constant-temperature water. With minor modifications, it can also be used in central air-conditioning systems for maintaining stable water temperatures in cooling and heating systems. If equipped with a steam-water mixed intelligent mixing device, the need for a separate hot-water storage tank can be eliminated, thereby saving space and reducing manufacturing costs. (Our company can simultaneously manufacture various models of steam-water mixed intelligent mixing devices.)

The performance characteristics of thermostatic mixing equipment include the following points:

a. Intelligent mixing equipment with automatic water temperature control, offering convenience, hygiene, water conservation, and power savings.

b. The mixing equipment features high reliability, strong anti-interference capability, and a long service life.

c. The mixing equipment features a wide temperature control range and high temperature control accuracy.

d. The mixing equipment is compact in size, easy to install, reduces the cost of tank fabrication, and saves on raw materials and building space.

e. The mixed-water equipment is easy to operate, simple to maintain, and can continuously supply constant-temperature water.

f. The mixing water equipment features digital display for intuitive and straightforward operation, as well as over- and under-temperature alarm functions.

g. The installation and use of a mixed-water device with steam-water mixers can reduce the manufacturing costs of heat exchangers and hot water storage tanks.

As the only manufacturer capable of producing thermostatic mixing equipment, the newly built bathhouse at Tianjin University of Commerce is equipped with 200 units of the intelligent Chengde Longzhida mixing devices. The bathhouse utilizes underground hot water at a temperature of 48°C, delivered via a variable-frequency pump with an outlet pressure of 0.2 MPa. Cold water is supplied from the municipal tap water network at a pressure of 0.35 MPa. These water supply conditions fully meet the operational requirements of the mixing equipment. The main challenge in this project was the secondary recycling of cold water within the piping system. To address this, we adopted an external water tank approach to reuse the recirculated water, significantly reducing the bathhouse’s overall water consumption. This solution has been highly praised by our customers.

The Chengde Longzhida constant-temperature mixing equipment is easy to use, has a wide range of applications, occupies a small footprint, boasts reliable performance, provides an ample water supply, is simple to install, delivers significant material-saving benefits, and holds great potential for future applications. By using Chengde Longzhida mixing equipment, you’ll achieve substantial benefits in terms of energy conservation, water savings, reduced land use, lower operating costs, and improved management efficiency. For pricing inquiries, please call: 15343144268

Where can I find a manufacturer of thermostatic mixing equipment? — Chengde Longzhida is located at No. 3 Longzhida Road, High-Tech Development Zone, Chengde City. Mr. Qiu: 15343144268 Welcome to shop!

Are you looking for the price of a mixing valve? Are you searching for a mixing device that can replace a bathtub mixing valve? Do you think mixing valves are expensive? Let us introduce you to the Chengde Longzhida mixing valve.

First, the Chengde Longzhida mixing faucet requires an external power supply to operate. It cannot heat water; it can only mix hot and cold water. Second, the mixing faucet consists of two main components: a sensing control section and a mixing actuator section. The sensing section uses a temperature sensor to detect changes in water temperature and employs a microcomputer to precisely adjust the ratio of hot and cold water. The mixing actuator then performs the actual mixing. Inside the mixing bucket of the actuator section lies a sophisticated mechanism—not just a single or a few mixing blades. Instead, the water is divided into several segments, each equipped with a vortex-type mixing blade. This ensures that the water temperature remains uniform throughout the entire bucket and allows for rapid mixing to the preset temperature. Typically, the temperature-control accuracy can reach as high as 0.5℃.

Alright, now that we’ve briefly explored the structure and operating principle of a mixing valve, it’s time to talk about the issue you’re probably most concerned with: the price of a mixing valve. As we’ve learned, the internal design of a mixing valve involves temperature sensors, electromagnetic valves (more than one), and various electronic components. The key difference between a mixing valve and a traditional mixing faucet lies in its incorporation of advanced technology. So now, let me compare the prices of traditional mixing faucets with those of mixing valves—perhaps this will help you make a more informed decision.

1. The price of a single mixing valve on the market varies from tens to hundreds of yuan, yet bathrooms often use more than one mixing valve. If we take a relatively common price of 100 yuan per valve, 20 shower stations would require 2,000 yuan. Meanwhile, thermostatic mixing valves are even more expensive—on Alibaba, a single unit typically costs between 200 and 300 yuan, while a fully equipped one with after-sales service can go up to 500 yuan. Thus, for 20 shower stations, the cost would amount to 10,000 yuan.

2. There are two common types of standard mixing valves, and their installation structures differ slightly: One type can be turned to the right, with the handle positioned upward for hot water supply. In this type of mixing valve, the opening in the middle is the outlet, while the openings at both ends connect to cold and hot water supplies. The other type features a switch on the left side specifically designed for hot water supply. Typically, the upper opening connects to hot water, the lower opening to cold water, and the right-hand opening serves as the outlet. First, let me clarify for you: Standard mixing valves can absolutely be installed without regard to the cold-hot markings. However, thermostatic mixing valves—those that provide constant-temperature water—must be installed according to the cold-hot markings and cannot be installed backward; otherwise, no water may come out at all, or the water coming out could be entirely cold or entirely hot. A mixing valve is simply a valve that blends cold and hot water. Actually, the valve itself doesn't perform any mixing—it's merely the connection of cold and hot water pipes that creates the blending effect. There are two main installation methods for mixing valves: One is direct installation onto wall-mounted shower or bathtub faucets, where the cold and hot water inlets are typically spaced about 14.5 cm apart and require specific connecting fittings with high precision in terms of fitting compatibility. The other method involves connecting via flexible hoses, which necessitates installing angle valves at both the cold and hot water outlets and using metal flexible hoses to connect the valve. As for whether an S-bend foot is required, this concept is rather confusing and unclear. When you carefully calculate the cost of this accessory and the labor involved in its installation, it might not even be as cost-effective as purchasing a mixing valve itself.

4. With a mixing valve, the water temperature is unstable, and adjusting the water temperature manually results in significant water wastage. In contrast, a mixing device eliminates this wastage altogether, and any leftover cold water from the day can be recycled and mixed again the next day. Over time, this can help reduce the cost of bathwater significantly.

5. The mixer requires absolutely no additional accessories—at most, it comes with a water tank, which is already a standard component found in most bathtubs. When you buy our mixer set, you’re getting the complete unit along with a comprehensive installation package. We’ll even send our own technicians to handle the installation for you, and our after-sales service is top-notch as well. We offer a lifetime warranty—no need for those messy, unnecessary accessories at all. Centralized mixing ensures uniform water delivery.

6. In addition, the mixer is equipped with overtemperature and undertemperature alarm functions, ensuring safety and helping you avoid the risk of scalding customers.

Do you think the price of the mixer is high? If you’re interested, please call Manager Qiu: 15343144268

Which brand of bath mixer is the best? Hebei Chengde Longzhida. Chengde Longzhida is a modern, high-tech enterprise integrating software development, product integration, and manufacturing. In collaboration with Peking University, Tsinghua University, Beijing University of Aeronautics and Astronautics, Taiwan’s research institutes, and others, Longzhida has developed an intelligent thermostatic and constant-pressure mixing device (bath mixer) that boasts independent intellectual property rights. Thanks to its high technological content, simple and convenient operation, reliability, and remarkable energy- and water-saving performance, this product has earned widespread acclaim from hundreds of schools and thousands of users across China, achieving energy- and water-saving effects of over 50%.

What are the advantages of the Chengde Longzhida bathtub mixer?

Which brand of bath mixer is the best? Hebei Chengde Longzhida. Users of Chengde Longzhida mixers span numerous university campuses across China, including renowned institutions such as Tsinghua University and Beijing University of Aeronautics and Astronautics.

1. The bath mixer is easy to use, featuring electromechanical integration and automatic water mixing—no manual adjustment required. Since the device has a digital display, you can set your desired temperature yourself—for example, 42 degrees—and it will automatically mix water to exactly 42 degrees, adjusting the water temperature automatically to maintain your set target.

2. The bath mixer has a wide range of applications: It is suitable for bathhouses (rooms) in government agencies, organizations, enterprises, and public venues, as well as for industries such as chemical processing, dyeing, and printing that require constant-temperature water.

3. The bath mixer occupies a small footprint and is highly convenient. If you install and use a smart mixed-water mixer that combines steam and water, you can eliminate the need for a hot-water storage tank, thereby saving both space and manufacturing costs. Among these models, HSZ-10A, HSZ-20A, and HSZ-30A are wall-mounted mixers that are compact in size and easy to install and carry. Take the HSZ-20A as an example: it has a flow rate of 20 tons per hour, measures 660mm × 350mm × 905mm, and operates on a power supply voltage of 220V (or 380V for models after 50A). The entire unit weighs 60kg.

4. The bath mixer features reliable performance, providing stable mixed water at a constant temperature and pressure, thereby completely eliminating the issue of fluctuating water temperatures. The key advantage of this mixer is that it can deliver water at a temperature ranging from 32°C to 48°C, allowing users to set their preferred water temperature according to their own comfort level. Model HSZ-50BP and above countertop mixers are equipped with a frequency converter in their electrical controller, which regulates the output pressure of the cold-water pump to ensure consistent water pressure supply.

5. The bath mixer provides an adequate water supply and maintains a constant water temperature. The mixers are available in seven models, categorized according to their hourly water flow rates: HSZ-10A, HSZ-20A, HSZ-30A, HSZ-50BP, HSZ-100BP, HSZ-150BP, and HSZ-200BP.

6. The water-saving effect is significant, and the cooled water can be recycled and reused. The mixer is equipped with a pipeline return pump circulation system controller in the electrical control unit, which automatically circulates the cold water from the pipes back into the water tank, thereby avoiding wasteful discharge of cold water from the pipes.

Which brand of bath mixer is the best? Hebei Chengde Longzhida. As a manufacturer of bath mixers in North China, our company has consistently innovated and improved our products. However, it’s not easy to ensure that a great product gains widespread recognition and familiarity among consumers. Using a bath mixer can bring significant benefits, including energy savings, water conservation, reduced space requirements, lower expenses, and easier management. We’re not limited to the North China region—whenever you have a need, feel free to give us a call for inquiries. We’ll arrange shipment for you and provide on-site installation services.

Chengde Longzhida is wholeheartedly at your service!

How can we store and keep hot water in a bathhouse warm? It’s difficult to maintain a stable water temperature in a tank-type bathwater storage system. Even traditional methods—such as adding insulation cotton or using insulation covers—still fail to address the issue of fluctuating water temperatures. Rather than getting bogged down trying to improve insulation, why not try a constant-temperature mixing device that continuously monitors and adjusts the mixed water temperature? In this case, you’ll need a constant-temperature mixing device specifically designed for automatic bathwater temperature regulation. In 1998, Chengde Longzhida, in collaboration with Tsinghua University, Beijing University of Aeronautics and Astronautics, and research institutes in Taiwan, jointly developed a constant-temperature mixing device with independent intellectual property rights, primarily intended for automatic bathwater temperature control.

The main working principle of a thermostatic mixing device is to utilize the pressure difference between cold and hot water. By adjusting the flow rate of cold water mixed into hot water through the opening and closing of solenoid valves—based on the flow rate of warm water being used—it achieves the purpose of regulating water temperature. The thermostatic mixing equipment for public bathhouses consists of an intelligent control electrical control section and a mechanical mixing actuator section. The entire system comprises two main parts: one is the electrical control section, and the other is the mechanical mixing actuator section. Depending on the flow rate and pressure level, thermostatic mixing devices can be installed in different ways; the most critical aspect is the installation between the mechanical actuator and the piping system.

Constant-temperature mixing equipment has numerous advantages:

(1) Save energy, reduce the size of water tanks, use single-pipe water supply, and lower the costs of bathroom piping.

(2) The flow rate of the mixing device can be adjusted to consistently deliver water at a stable temperature. Temperature adjustment is convenient and digitally displayed—allowing you to set the desired temperature yourself. The water mixed by the device will remain at this temperature continuously, with an error margin no greater than 1 degree.

(3) Mixing devices are particularly well-suited for shower water supply in bathhouses. When used in combination with thermostatic mixing devices and smart showers, they achieve high water-saving efficiency, typically reducing water consumption by 46% or more. They are especially ideal for supplying water to sensor-activated showers, where the water-saving effect is exceptionally pronounced.

How can you keep the hot water in your bath pool at a constant temperature? Try our thermostatic mixing equipment—featuring microcomputer control and fully automatic operation, it maintains a steady temperature around the clock. Chengde Longzhida’s thermostatic mixing equipment is the most advanced bathing pool mixing system available today, dating back to 205. Our company has established cooperative relationships with numerous universities, including Tsinghua and Peking University, and has received overwhelmingly positive feedback. Moreover, our thermostatic mixing equipment is especially well-suited for providing consistently heated water to bathing pools equipped with sensor-operated showers. If you’re currently planning to build a new bath pool, our team can send specialists to your site for an on-site assessment. We’d be delighted to help you design the most water-efficient bathroom renovation plan possible. Don’t hesitate any longer—give us a call today to learn more!

What should you do if the bathwater temperature keeps fluctuating between hot and cold? I’m sure many pool operators have been troubled by this very issue—sudden, unpredictable changes in water temperature. A significant number of pool owners are currently grappling with this problem. Have you ever used a thermostatic mixing valve? Perhaps you’ve found that these valves come with a hefty price tag and complicated accessories, and the total cost of several such valves can leave you feeling reluctant and dissatisfied. Even worse, these valves often fail to deliver truly consistent water temperatures—they’re little more than a gimmick. So, is there a reliable mixing device that can completely solve the problem of fluctuating bathwater temperatures?

What should you do if the bathwater temperature keeps fluctuating between hot and cold? Since the number of people using public bathhouses varies constantly, traditional mixing valves often result in unstable water temperatures—alternating between hot and cold. Manual adjustments to maintain a consistent temperature are time-consuming, energy-intensive, and wasteful of water. The Chengde Longzhida smart mixing valve is specially designed for bathhouses, truly allowing bathhouse owners to enjoy peace of mind without any worries.

The Chengde Longzhida Intelligent Mixing Valve is specially designed for mixing cold and hot water in bathhouses, with an output water temperature deviation of ±0.5°C. The outlet water temperature can be set independently. It can accommodate up to 300 showerheads, allowing simultaneous or staggered bathing. It is also suitable for mixing water when cleaning machine parts in factories.

Smart mixing valve: It is a mechatronic device that uses a temperature sensor to detect water temperature, a microcomputer for control, and a solenoid valve for actuation, automatically adjusting the water temperature to reach the preset usage temperature. It provides a safe supply of constant-temperature, constant-pressure hot water, effectively addressing the waste of thermal energy, manpower, and water resources typically associated with conventional single-boiler systems and mixing valves. It truly solves the problem of fluctuating bathwater temperatures—alternating between too hot and too cold.

The Chengde Longzhida smart mixing valve has numerous advantages over traditional mixing valves:

1. It’s easy to use—no need to mix the water on the spot or adjust it manually. Since the device features a digital display, you can set a specific temperature yourself—for example, 42 degrees—and the system will automatically mix water at exactly that temperature, adjusting the water temperature as needed to maintain your desired setting.

2. Mixing valves occupy a small footprint and are highly convenient. If you install a smart mixing valve that combines steam and water, you can eliminate the need for a hot-water storage tank, thereby saving both space and manufacturing costs. Wall-mounted mixing valves are compact in size and easy to install and carry.

3. The mixer provides an ample water supply and maintains a constant water temperature, ensuring reliable performance and truly resolving the issue of fluctuating bathwater temperatures.

4. The mixer significantly saves water by enabling the recycling and reuse of cold water. The thermostatic hot-and-cold water mixer is equipped with a pipeline recirculation pump system controller in its electrical control unit, which automatically circulates the cold water from the pipes back into the water tank, thereby preventing wasteful discharge of cold water through the plumbing system.

What should you do if the bathwater temperature keeps fluctuating between hot and cold? If you purchase our products now, Chengde Longzhida will provide you with installation plans and other related services. We offer a wide range of equipment models and specifications, allowing you to choose the right model based on your specific needs—such as water flow rate and the number of shower heads required. Our largest model can accommodate up to 300 faucets and deliver an hourly water supply of 200 tons. We also have compact wall-mounted mixing valves suitable for small bathtubs and hotels. If you’re interested in purchasing or becoming our agent, please give us a call to discuss further! We’ll be happy to answer any questions you may have.

Smart mixing valves have been widely adopted in bathhouses at many universities across China. As we all know, school bathhouses handle extremely high water flows. Precisely because the Chengde Longzhida smart mixing valve is energy-efficient, water-saving, and remarkably stable in operation, it’s the smart choice for those who know what they’re doing.