How to add a waterproof sealing joint to a flexible tube
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Dear teachers, there are quite a few instruments on site that have water entering through flexible pipes; one end of these pipes is G3/4 and connects to the wire gland, while the other end is 1/2 NPT and connects to the instrument. What type of cable waterproof connector should be installed to prevent water from entering the instrument? It’s best to send a picture.
When placing an order for the 1/2NPT end, it should be equipped with an annular sealing plug, usually made of rubber, which holds the cable insulation in place and secures it; however, this approach is only applicable to those instrument connections that have a stepped design. So, one can add an explosion-proof gland of their own, with an integral ring seal.
The water enters through the cable tray, into the metal conduit (galvanized pipe), and then proceeds along the explosion-proof flexible connection tube to reach the instruments. In fact, you need to understand the function of this explosion-proof flexible connection tube – why is it called such? It’s because the connection point to the instrument comes with its own sealing gasket; how is explosion protection achieved for the instrument? Its purpose is to prevent the instrument from coming into contact with the outside environment, thereby stopping external flammable gases from entering the instrument. When there are loose connections in the electrical components of the instrument and sparks are generated, these sparks can ignite the flammable gases, leading to fires or explosions. Another function of explosion-proof flexible connectors is to protect the cables. Therefore, by addressing the sealing issues at the electrical interfaces of the instruments, we can effectively prevent water from entering. An effective measure to do this is to thread a fitting at the lower end of the metal conduit and connect a three-way wiring box to it; one end of this box is connected to the explosion-proof hose, while the other end remains unused for draining water.
The third floor is correct. Flexible connection pipes: proper installation
This won’t do; when an expert comes to inspect it, they just block it off.
The simplest way is to apply glue or use waterproof tape, then wrap several layers around the joint for protection
Don’t use flexible hoses; they provide protection for the cables but are not explosion-proof. Use explosion-proof gland fittings instead
1. Add a hydrophobic tee; 2. Add an explosion-proof sealing joint. As long as they are used correctly, water will not get in
Experts point out that we only recognize explosion-proof flexible hoses, but not explosion-proof flanges; even if I show them the instrumentation installation manuals from the People’s Republic of China, they still refuse to acknowledge them – it’s either an explosion-proof flexible hose or it’s not explosion-proof. They simply don’t want to look at those installation manuals, haha!
Then ask him what this explosion-proof flexible connection tube is used for, and why it needs to be blocked off How to prevent explosions? Where sparks are generated is where explosion protection is needed. Does an on-site magnetic flap level gauge require explosion protection? Many experts just follow what others say; use a little common sense and outwit them.