Safety valve heating and electric water heater with hot water leakage when no one

If this situation is normal, as mentioned above, when no hot water, electric water heater there is equivalent to a closed system, this time inside the water is heated, temperature, volume expansion, but because electric water heater tank volume is constant, there is no place to absorb the expansion water, so the water pressure inside the water heater will be increased when the pressure is greater than the take-off when the pressure relief valve, pressure relief valve will take off within the protection of the water heater bile, is what we see in the drip valve. If you want to in this case the safety valve is not dripping, you can install an expansion tank in the Italian Akusitan pipeline between the safety valve and the water heater to absorb the amount of expansion produced after water is heated, the heating time electric heater, water pressure will not rise much;

The difference between safety valve and pressure relief valve

[1] Simply put, the pressure relief valve to prevent the system exceeds a certain value, is mainly used to protect the system, the valve is to reduce the system pressure from a high pressure to the appropriate value required for its export pressure a range, as long as this range can be.
[2] Safety valve: valve is opening and closing pieces by the external force is normally closed state, when the device or media pressure inside the pipe rises above a predetermined value, by medium pressure pipeline or equipment to the outside of the system to prevent the emission medium special valve exceeds a predetermined value. Safety valves are automatic valves, mainly used in boilers, pressure vessels and piping, control pressure does not exceed a predetermined value, for personal safety and equipment operation plays an important protective role. Note the safety valve must be pressure tested before use.
[3] valve: valve by regulating the inlet pressure is reduced to the outlet pressure of a need, and rely on the energy of the medium itself, so that automatically maintain a stable outlet pressure valve. From the point of view of fluid mechanics, pressure reducing valve is a local resistance to change spending components, that is, by changing the throttle area, so that the kinetic energy of change velocity and the fluid, resulting in different pressure loss, so as to achieve the purpose of decompression. And then rely on regulation and control and regulation systems, so that the valve pressure fluctuations and the spring force balanced, so that the pressure after the valve

Installation considerations gas safety valve

1, the installation directions: Make sure the gas valve mounted horizontally, and the direction of the arrow solenoid valve body surface with the gas medium flow direction consistent with the solenoid valve head upright.
2, pipeline media: should be clean and free of particulate impurities, and non-corrosive. If necessary, install a filter in front of the solenoid valve.
3. Installation Environment: Indoor or outdoor rain facilities. Ambient temperature -10∽ + 50 ℃, relative humidity 5-95%.
4, the operating space: Make sure the solenoid valve in manual operation there is sufficient room for maneuver, and leave the space required equipment maintenance. General solenoid valve top space height should be more than 20CM.
Power connection: from within the explosion-proof lead frame leads to the power cord. Proceed as follows:
(1), completely loosen the lock nut, cover the surface of the lead screw the M5 set screw, lead screw off the cover to expose the built-in terminal.
(2), the RVV0.75 * Type 2 wires through the lock nut and the lead cover is connected to the built-in terminals, tighten the screw pressed line.
(3), tighten the wire cover, tighten its surface M5 set screws, completely tighten the lock nut. Instantaneous power test, the solenoid valve shall be able to move the action.

Combination gas cooker safety valve and solenoid valve

gas stove valves and safety valve interlocking mechanism, the safety valve is mounted on a gas valve body, the valve features a sealed chamber, sealed chamber equipped with a rotatable pawl, in turn shifted ground rodIt has an ear and a hook, lug with the gas in contact with the bottom of the valve stem within the valve, the valve slider hook with safety solenoid valve spool at the bottom of the contact.
It is simple, easy to use, small size, low cost, feel good.

Gas valve switching direction

We see everyday gas valve or seal lid clockwise is off, counterclockwise are open. For example, the cover of bottled water, bottled honey closures are like this. The scientific statistical proof: People in knee-jerk reaction or instinctive action is clockwise operation. Therefore, the provisions of the Gas Valves clockwise to off (safe state), this design is a scientific basis.

How open gas meter valve

Natural gas meter can be divided into several, one is the common gas meter, that can not install the battery, with only a mechanical counter, then this is not the inner table of the valve to shut you breathe it, you must use gas valve table after table or in front, the other is intelligent gas meter with LCD display, you must install the valve, usually such a table is prepaid, then this internal table are valves in your inner table there is the case of the remaining gas, the valve has been opened, if there is no remaining volume in the table when the valve will automatically close. This time you have to recharge in order to open the valve, but if you really need to close the valve, you can remove the battery, this time, the valve will be closed within a table.

Body type Gas Control Valve

Many types of Gas Control Valve body, commonly used through single-seat, through two-seater, angular, diaphragm, low flow, tees, eccentric rotation, butterfly, sleeve type, spherical, etc. In specific choices, do the following consider: (1) disc shape of the structure, flow characteristics and mainly based on the selected factors to consider such as power imbalances (2) wear resistance, when the fluid medium is a suspension containing a high concentration of abrasive particles, valve. internal material to be hard. (3) corrosion resistance, as a corrosive medium, try to choose simple valve. (4) medium temperature, pressure, when the medium temperature, high pressure and great change, should be used and the valve spool seat materials by temperature and pressure changes small valves. (5) to prevent steam and air, steam and air only in a liquid medium in the actual production process, steam and air will form a vibration and noise, shorten the life of the valve, so the choice should Propane Control Valve prevents the valve generate steam and air

When the gas fire, you should first close the valve, what fire works?

Cut off fuel.
Extinguishing principle of water: the water itself does not burn, cover the surface of the combustible material to absorb a lot of heat, the temperature of fuel drastically reduced to less ignition point, and water vapor produced in the combustible surface covering, also played a cut off the air role.
Carbon dioxide fire extinguishing principle: because of the carbon dioxide itself does not burn or support combustion, density greater than air, played the role of isolated air, without oxygen naturally extinguish the fire.
Overall, biomass burning have two conditions: a temperature drop below the ignition point, the absence of air between two indispensable fire, meet one of the conditions, the fire can be extinguished.!