What does a water heater safety valve do?

The water heater safety valve is a multi-functional storage electric water heater safety relief valve, which is suitable for electric water heaters and air energy water heaters, and has the functions of check valve and pressure relief valve, which can prevent the backflow of water into the electric water heater and discharge excess pressure when the pressure of the inner tank of the electric water heater is high, so as to ensure the life of the inner tank and avoid the occurrence of bile burst accidents.

Water heater safety valve, valve body tee, divided into water inlet cavity, water outlet cavity and safety cavity, the safety cavity has a drainage hole, in the water outlet cavity placed check valve core, external adjustment spring, limited by adjusting the limiting sheet, in the safety cavity placed elastic pad, safety valve core and drainage rod, safety pressure adjustment spring, adjusting cover through the drainage rod screwed into the safety cavity, there is a protective cover plate outside, the end of the drainage rod is connected with a drainage ear, the drainage ear is buckled with a protective buckle, and the protective buckle is fixed on the drainage hole seat with a drainage pipe joint.

It has the functions of check backflow, safe pressure relief, drainage cleaning, etc., and is easy to adjust. The safety valve should be installed vertically and at the vapor interface of the vessel or pipeline.

Electric water heater. The safety valve has three functions:

1. Pressure relief, the pressure of the water storage bucket will rise when the water is heated, if the thermostat fails, the pressure will be higher and higher, which will cause the water storage bucket to burst and the danger will occur, and the safety valve will automatically open and relieve the pressure when the pressure reaches a certain value to ensure safety.

2. Check valve.

Function, the safety valve is still a check valve, the check valve will be opened by the water pressure of the inlet pipe when the water is inlet, and the hot water will flow into the water supply pipeline due to the increase in pressure in the barrel when heating, and the check valve will prevent the hot water from flowing back.

3. Drainage, because the water heater barrel is usually full of water, the water outlet is in the upper part of the barrel, and the water can not be discharged when the drain is opened.

The safety valve must be installed on the water inlet, and the pressure value and use method of the safety valve of different brands and models of water heaters may be different, depending on the instructions for use, so as to avoid the danger of improper use.

The small screws are used to fix the handle and do not need to be disassembled, but do not tighten it too tightly when using it, so as to ensure that the handle has a certain movement clearance.

The function of the safety valve:

1. The role of pressure relief. When the electric water heater is plugged in, when it is working, if the water pressure of the part is relatively large, then the pressure relief valve plays a role, which can eliminate the excess pressure in time, ensure the safety of the water heater and prolong its service life.

2. The effect of preventing water backflow. When the water heater is working, it is necessary to ensure that there is enough water stored in it, in case there is no water in the electricity, there will be dry boiling, which is very dangerous. The installation of a pressure relief valve can effectively prevent the occurrence of such accidents and avoid the backflow of water.

The water heater safety valve plays a protective role, which should prevent excessive pressure.

The water heater safety valve works automatically and is safe to use only if it is installed correctly.

There is an arrow on the water heater safety valve, which is the direction in which tap water is added to the water heater, which is a one-way valve. The lower end is connected to the mixing valve, and the upper end is connected to the water tank, both of which are positive buckles.

The pressure relief outlet must not be blocked, because when the water temperature is high and the pressure is high, it is mainly relied on to relieve pressure to ensure safety. When the water pressure is too high, the water heater safety valve will automatically open to reduce the water pressure in the water tank and keep the water heater in a safe state.

When the pressure of the vessel exceeds the design specification, the safety valve will be automatically opened, and the exhaust gas will reduce the high pressure in the vessel and prevent the pipeline or container from being damaged. When the pressure in the vessel drops to the normal operating pressure, it automatically shuts down, avoiding waste and production interruption due to overpressure of the container.

Precautions for the use of water heater safety valves:

1. The water heater should be as close as possible to the hot water point with the highest frequency of use.

2. The water heater should avoid the power supply or the power supply should have waterproof measures in the place where the water may splash out.

3. The installation of the water heater must have an independent socket and reliable grounding, otherwise it should not be installed.

4. The installed wall must be a solid load-bearing wall, and the hanging device must be installed tightly and firmly on the wall, which must not be loosened, and can withstand four times the total weight of the water heater after being filled with water. In use, you should also pay attention to safety precautions, if you can't install it, be sure to ask a professional to install.

The water heater safety valve is suitable for electric water heaters, and has the functions of check valve and pressure relief valve, which can prevent the backflow of water into the electric water heater and prevent the excess pressure from being discharged when the pressure of the inner tank of the electric water heater is high, so as to ensure the life of the inner tank and avoid the occurrence of bile burst accidents.

The safety valve is a safety device to prevent pressure equipment and vessels from bursting due to pressure rise or internal pressure exceeding the limit. Safety valve is a widely used safety device for pressure systems such as pressure vessels, boilers, and pressure pipelines to ensure the safe operation of the pressure system.

When the pressure of the vessel exceeds the design specification, the safety valve will be automatically opened, and the over-pressure in the exhaust gas reduction device will be discharged to prevent the container or pipeline from being damaged. When the pressure in the vessel drops to the normal operating pressure, it automatically shuts down to avoid the discharge of all gas due to overpressure of the container, which can cause waste and production interruption. The safety valve is mainly composed of three parts: the seat, the disc (spool) and the loading mechanism.

Solution: It is recommended to close the water inlet valve and adjust the knob of the mixing valve to the high temperature to avoid the leakage of the one-way safety valve and make the water drip out of the shower. If the mixing valve is not installed, the hot water ball valve can be opened a little to relieve the pressure of the flowing water, which can also avoid the leakage of the one-way safety valve.

Fault phenomenon 2: The water heater is used for a short time Reason: The first time the water heater is used (or there is a section that is not used and reused) due to the short heating time of the water heater, the water temperature of the upper and lower layers is uneven, resulting in a small amount of hot water Treatment method:

It is recommended to use the water heater continuously for more than 12 hours to make the water temperature in the water heater even.

Fault phenomenon 3: The indicator light of the water heater has not been extinguished Reason: The contact point between the temperature sensing surface of the thermostat and the flange surface of the electric heating pipe is less Bad thermostat Treatment method: The water heater maintenance suggestion is to reinstall the thermostat to make the temperature sensing plane contact.

The safety valve, also known as the pressure relief valve, is installed at the place of the water inlet, mainly to ensure that the pressure is discharged in time when the water pressure is too large during the heating process, so the safety valve will generally have water dripping out during the heating process. However, it does not mean that water will drip when heated, and if the water pressure is within the tolerance range of the safety valve, it will not drip water. Prevent water from backing up when the water is stopped, ensure that the machine must be full of water, and avoid dry boiling.

There are four types of water heater safety valve leakage problems.

Situation 1: The safety valve of the water heater will not leak when it is usually used, and it will only leak when the electric water heater is heated and no one uses the hot water.

Solution: In such a situation, it is normal to encounter the leakage of the electric water heater safety valve, after the water heater boils hot water, no one uses hot water, at this time the electric water heater is equivalent to a closed system, when the water in the water heater is heated, its temperature will rise, the volume continues to increase, and the volume of the water heater is certain, there is no place to absorb excess expansion water, the water pressure in the electric water heater will continue to rise, when the pressure is greater than the starting pressure of the water heater safety valve, The safety valve will jump and relieve pressure to protect the inner tank of the water heater, and then we will find that the safety valve is leaking.

Situation 2: The electric water heater leaks when it is not in use.

Solution: When the electric water heater is not heated, the first reason for the leakage of its safety valve may be because its cold water pressure in the water heater is greater than the starting pressure of the safety valve, which is more obvious in the middle of the night when the water is low and the municipal water network pressure is relatively high. To solve this problem, you can install a pressure reducing valve on the water pipe to reduce the pressure of tap water from high pressure to a suitable pressure, so as to ensure that the water pressure at home will not be overpressurized, and it can also play a good role in saving water. The second reason that will cause the safety valve of the electric water heater to leak is that the safety valve is faulty and damaged, and we need to replace the safety valve of the electric water heater again.

Situation 3: Water comes out of the small hole of the safety valve.

Solution: During the use of the water heater, when the tap water pressure is too large, the steam pressure in the water heater will be greater than the pressure relief pressure of the safety valve, and then a small amount of water will appear, the thermostat will be damaged, and the water heater will always be in a heating state. When solving the problem, you can install a pressure reducing valve in front of the water inlet of the water heater or leave the outlet open.

Situation 4: The inner tank of the water heater is not tightly sealed, resulting in water leakage.

Solution: Under normal circumstances, during the use of the water heater, water beads will condense at the lowest part of the buckle seam of the right end cover, which will rust the inner tank of the water heater and cause the inner tank to leak. At this time, when overhauling, it is best to open the right end of the water heater for inspection in the state of ensuring the safety of power failure, if it is found that a large amount of condensed water, yellowing and dripping water have been found in the water heater, in fact, such a phenomenon means that the water heater is not tightly sealed and the water heater leaks, and the heating pipe of the heater needs to be removed for maintenance.

Installed in the cold water inlet of the water heater to prevent the inner tank from cracking due to excessive pressure due to excessive water inlet pressure. At the same time, the water pipe is drawn to the drain at the pressure relief port of the valve, because the water will be sprayed out of the pressure relief port when the pressure is too high.

Of course, some safety valves need to be manually lifted and released on a regular basis to confirm that the opening and closing of the valve disc is effective, and the starting pressure needs to be re-calibrated for a certain number of years. The calibration of safety valves can only be operated by a specialized agency or a qualified person. It is not necessary for general household use.

It is mainly to control the pressure of the water heater tank. If the water heater is lit and the water outlet from the shower is turned off later, in principle, the water heater will be turned off. But if there is a failure and the water heater does not turn off and continues to burn, then the water temperature of the water heater tank will rise, and the pressure will also increase, then the safety valve will work, it will open and relieve the pressure to prevent the water tank from bursting due to excessive pressure.

What is the role of the water heater safety valve and what should I do if the safety valve leaks? Let's find out.

Water heater pressure relief valve installation steps

1. Before installing the pressure relief valve on the protected equipment or before installation, it must be re-adjusted at the installation site to ensure that the setting pressure value of the pressure relief valve meets the requirements.

2. Within the range of spring working pressure level indicated on the nameplate, the opening pressure can be adjusted by changing the spring compression by rotating the adjustment screw.

3. Before rotating the adjustment screw, the inlet pressure of the valve should be reduced to less than 90% of the opening pressure to prevent the valve disc from being driven to rotate when the adjusting screw is rotated, resulting in damage to the sealing surface.

4. In order to ensure the accuracy of the opening pressure value, the opening pressure is generally reduced when the working temperature rises. Therefore, when adjusted at room temperature and used at high temperature, the setting pressure value at room temperature should be slightly higher than the required opening pressure value.

6. When the conventional pressure relief valve is used to fix the additional back pressure, when the opening pressure is adjusted after the inspection (the back pressure is atmospheric pressure at this time), its setting value should be the required opening pressure value minus the additional back pressure value.

Before using the pressure relief valve, it needs to be turned on, and as long as the water pressure inside the tank is too high, the pressure relief function can be realized. If the pressure of the inner tank of the water heater is exceeded, the pressure relief valve will relieve the pressure by itself and let the water flow out along the valve port to ensure the balance of the internal pressure and make it safer to use.

The water heater safety valve should be installed at the cold water inlet of the water heater.

The safety valve of the water heater has the function of overpressure protection and a one-way valve, so there is an installation direction, and the direction of the shear head on the valve body is the direction of water flow.

Usually the safe pressure value of the water heater is the pressure value that is marked on some valve bodies.

When the internal pressure of the water heater increases, such as the thermostat is broken, the water heater has been heated, the steam increases, the pressure will rise a lot, and it is easy to cause danger, at this time, the safety valve will be relieved to the safe value.

The function of the check valve is that when the water is stopped, the water inside the water heater will not be pumped back into the tap water pipe by other water equipment, resulting in no water heating in the water heater and burning out the heating pipe.

What is the function of the safety valve of <> water heater: it has the function of check valve and pressure relief valve, which can prevent the backflow of water into the electric water heater and discharge the excess pressure when the pressure of the inner tank of the electric water heater is high, so as to ensure the life of the inner tank and avoid the occurrence of bile explosion accidents.

This answer applies to most water heater brands such as Haier CEWH-60P5, Wanhe JSLQ20-12EV20, etc.