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Check valves, alongside magnets and thermal relays, play a pivotal role in hot water tank systems. But what exactly are they, how do they work, and how are they installed? Let's delve into the intricacies with Mytour!
1. The Essence of Hot Water Tank Check Valves
Hot water tank check valves, also known as check valves or safety valves, ensure that the tank operates within safe pressure limits and allows cold water to flow in only one direction. These valves are crucial components in the construction and operation of hot water tanks.
2. Anatomy of Hot Water Tank Check Valves
Hot water tank check valves comprise safety valves and one-way discharge valves, designed as a unified unit.
Components of a Check Valve:
- Valve Disc: Made from ABS plastic, it prevents reverse flow from the hot water tank.
- Valve Shaft: Attached to the valve disc, it stabilizes the valve's operation.
- Sealing Gasket: Made from EPDM or PTFE material, ensures a tight seal.
- Spring: Made from stainless steel, it allows the valve disc to close, preventing reverse flow.
Safety Components Include:
- Valve Disc: Also made from ABS plastic, it helps release pressure when the valve exceeds a certain limit.
- Spring: This component adjusts pressure by twisting the screw to increase the spring's compression.
3. Operating Principle of Hot Water Tank Check Valve
The safety valve operates as follows:
- In the absence of flow, the valve closes due to the force exerted by the spring and the weight of the valve disc.
- The valve disc is pushed away from its initial position by the pressure of the flowing water, causing the valve to open and allow water to flow from outside into the hot water tank. When the flow comes to a halt, and its velocity reaches zero, the valve returns to its original position. At this point, the outlet pressure of the valve quickly acts to hinder the valve disc's rotation, preventing reverse flow.
- The valve releases pressure through the vent hole when the pressure inside the hot water tank exceeds the permissible level. If the pressure is higher than the force exerted by the spring, it will push the valve disc of the safety valve to release pressure outside. Subsequently, the valve releases pressure until the pressure returns to normal.
4. Proper Installation Guide
Firstly, the hot water tank check valve needs to be installed on the cold water supply pipe marked in green and usually located on the right side. Users can follow these steps to install the check valve:
- Step 1: Place the safety valve on the cold water supply line of the tank. Ensure to tighten only 3 - 4 threads to avoid over-tightening, which could cause the valve to jam or break.
- Step 2: Next, connect the cold water supply line to the bottom of the check valve using a flexible hose to facilitate tank maintenance and cleaning.
- Step 3: Connect the hot water pipe to the outlet line of the hot water tank.
- Step 4: Then, connect an additional pipe to the outlet hole of the check valve to allow water to escape when necessary.
- Step 5: Check the installation by opening the valve to let water flow through. In case of any leakage, tighten the valve.
Installation Notes:
- Use genuine check valves to ensure quality and compatibility with the hot water tank.
- During installation, ensure the correct procedure is followed according to the instructions and, most importantly, the correct side of the water supply pipe.
- Although the installation steps are relatively straightforward, if you lack the necessary tools, it's advisable to seek assistance from a skilled technician.
5. Common Issues with Hot Water Tank Check Valves
During usage, the hot water tank check valve may encounter water leakage issues. This is often caused by:
- Improper installation causing water leakage during usage due to mismatch with the water supply line.
- Incorrect positioning of the valve according to manufacturer standards.
- Signs of damage or tearing in the non-rubber layer of this component.
Remedial Measures:
- Selecting the appropriate safety valve type that matches the equipment in use.
- Ensuring correct installation position and technique as per the instructions.
- For issues caused by damage or tearing in the non-rubber layer, the most effective solution is to replace it with a new non-rubber layer to prevent water leakage.
- If the issue cannot be resolved, contacting a repair technician for thorough inspection and efficient handling is advisable.
Furthermore, hot water tank check valves may encounter other issues such as clogging or jamming due to accumulation of dirt, resulting in weakened water supply into the tank. In such cases, removing the valve for inspection and cleaning is necessary to address this issue.
This article from Mytour has shared with you essential information about hot water tank check valves. We hope this article will provide useful insights for you in using the device. Thank you for following!
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