Gas Dehydrators and Filters

Vessel's Body

The devices are presented as cylindrical tanks with a vertical axis at the lower end closed by a welded cap and the top by an ISO threaded Q.O.C. Fulg-o-thread. The bodies, usually built in Carbon Steel equiv. to API5L-X52, are designed for mechanical filtration and chemical-mechanical dehydration of natural gas aimed to power the instruments immediately downstream of the same and are designed taking also into account the requests of the Customer.

Cartridge Filters

Traditional filtration system essential to separate debris floating in the fluid that can be extremely harmful to the proper functioning of equipments such as precision measurement systems:

  • The most important filtration phase is obtained by forcing the fluid through the cartridge walls from inside to outside.
  • After the passage through the cartridge walls the fluid is cleaned up to the desired grade based on the type of cartridge
  • The effectiveness of the cycle is assured by the periodic replacement of the cartridge.


Inside the gas dehydration process is carried out automatically by three effects in series:

Gas Dehydrator
  • The first stage of dehydration is achieved by the turbulence at the entrance of the dryer.
  • The second phase is achieved by spray drying of the salts.
  • The final phase is implemented through the absorbent layer of boards placed on the grating of the basket.

Step 1: the gas at the entrance of the dryer is pushed down and then forced to rise. In this motion, the curved liquid and solid particles suspended in the gases reach the bottom of the dryer before being purged by its orifice.

Step 2: the gas flow is significantly slowed down because of bottlenecks in which he is forced to pass. The adsorbents tablets dissolve slowly creating a damp fog still not saturated absorbent salt that falls by gravity. Before you reach the bottom of the dehydrator absorbs the mist of water particles suspended in gas. The salts absorb the finer particles and precipitate removal by making it easy to bleed less.

Step 3: the passage of gas through the layer of absorbent tablet purifies the gas completely, making it commercially sterile and non-toxic, ready to use.

Maintenance & Consumables

The Dryers and Filters as devices are completely maintenance free, while the cartridges, processing tablets or dehydrating gel are subject to decay. This form of consumption can be at various grades of decadence based on the fluid’s conditions and quality. Of course the more often the inside consumables are replaced the better will be the relevant filtration or dehydration capacity and performance that means in turn a more appropriate instrument’s feeding which is directly proportional to its lifecycle length. The advantage is represented by another main asset identified in the precision of the measurements thanks to more efficient instruments capable to detect and observe thinner variables for longer periods of time. Needless to mention that the technological innovation brings up more and more sophisticated and expensive instruments that can be completely exploited only if utilised with clean fluids.

Non Destructive Examinations (NDE)

All Bodies are normally subject to Non Destructive Tests by means of Radiographic Test (RT), Ultrasonic Test (UT), Liquid Penetrant test (PT), Magnetic Particle Inspection (MPI) and Hydraulic Test (HY) with water. Click here to visit our N.D.E. Dept.