M8 Gland Penetrator

Gland penetrator is a common industrial component used for cable sealing. However, it is usually used for splash prevention or shallow water protection, and cannot ensure consistent pressure levels. The patented technology of this gland penetrator is relying on the accurate size of rubber and matching parts of the structural design, to realize the waterproof sheath cable without glue deep water wiring, and through the small batch long-term test, can save a lot of time to avoid the risk of bad glue filling.

The thread size of this gland penetrator is M8×1, suitable for sealed lead-out of underwater cable within a maximum depth of 300 meters. It is only compatible with SUBLAB's 3x20AWG cables, namely the cables of Z60 and Z60S thrusters.

With the locking cap tightened, the compress plug downward compression seal; seals are compressed to the inner and outer and oblique expansion; when the locking cap close to the height of the appropriate gap ring, the cable sheath is compressed to the holding position and the sheath has a clear narrowing mark, there is a certain degree of resistance to cable pulling ability.

As the external water depth or water pressure increases, the cable sheath as a whole will be compressed inward, at this time the sleeve ring is pressed against the bottom cut surface of the sheath; the seal is further compressed to hold the cable sheath; the seal is squeezed towards the internal surface of the bulkhead penetrator; the seal is pressed tighter and tighter towards the beveled surface inside the bulkhead penetrator.

The different hole diameters of the compress plugs and sleeve rings are adapted to cables with different outer diameters and sheath thicknesses, while the sleeve ring has a minimum inner diameter hole that is just the smallest diameter of the sheath's cross-section, thus holding the cable against the water pressure and preventing it from being pushed inwards by water pressure.

The split compress plug prevents the seal and other non-sealing from being twisted and displaced by friction in compression directions when the locking cap is tightened.

Since this gland is specifically designed for SUBLAB's 3x20AWG cables, the gap ring and sleeve ring have been cancelled. Just tighten the locking cap all the way through to achieve the appropriate compression.

1. Prepare the cable by cutting the sheathed cable to the appropriate length, stripping off the sheath and core filler at the end that enters the watertight enclosure, and paying attention to the flat end of the sheath.

2. Use alcohol and a dust-free cloth to clean the outer jacket of the cable and all parts of the gland penetrator.

3. Thread the parts of the gland penetrator in order, press the cable inward to tighten the shear steps against the sleeve ring, and hand-tighten the locking cap to fix it initially.

4. Use wrench and vise or special scratch-proof wrench tool to set into the locking cap and penetrator, tighten to the gap ring just do not shake.

1. The end part of the sheath that goes into the gland penetrator needs to be cut flat and fit the sleeve ring.

2. All parts must be wiped clean with alcohol, especially the cables, penetrator inside, seals, any dust oil stains and other impurities will have an effect on the seal.

9. In the process of tightening the locking cap, the cable should be tightened inward to make the cable shearing surface stand against the sleeve ring.

● Can the sealing part be disassembled and assembled repeatedly?

It is not recommended to dismantle the sealing part repeatedly, if you have to dismantle the sealing part, try not to do it more than 2 times, and the cable which has been compressed should not be compressed again in the same position, and the cable sheath should be cut again.

● How is the waterproof depth guaranteed?

The dimensional structure of this patented design is such that when the locking cap is screwed to the specified position, the compression of the seal meets the sealing requirements for the indicated water depth.

● What are the advantages over glue-filled cable penetrator/ underwater connectors?

The tails of glued cable penetrators cannot be bent or pulled; there is no need to wait for the glue to cure, the seal is completed by tightening in place; and it can be disassembled, whereas glued cable penetrators require the cable to be cut and the penetrators discarded.

The main advantage is no potting, more reliable and convenient than cable penetrators, eliminating the need to wait for the glue to cure. It is a non-pluggable fixed outlet connection than underwater connectors.

● Are there other forms of mounting?

The standard product is a bulkhead penetrator and a nut with a O-ring, It is installed in a similar way to the cable penetrators.

Other mounting methods will be available later, such as a gland penetrator with a step edge that is screwed to a end cap, or a method that directly inserts a smooth cylindrical surface with a O-ring into a hole.

● Is the water depth data a theoretical value?

It is the data of actual small batch pressure test, such as 300 meters water depth, the actual pressure test according to 400 meters for more than a week.

● Can other brands of cables be used?

Pressure testing is required to determine suitability, and the rated water depth is the result of testing with SUBLAB standard cables.