Transcript
THE SOVENT SYSTEM Piping System concept before- “one has to install pipes of larger size” Piping Systems before Sovent System Developed : One Line Piping Double Line Drainage System Two line drainage system is sometimes referred to DWV, which means Drainage,Waste, and Vent . It is also called as Traditional Two Line Drainage System because of its existence for centuries now. Vent Pipe The incorporation of the Vent pipe in the plumbing system, although promoting efficiency of the installation services, has also brought some of the problems enumerayed as follows: 1. The routing and re-routing of the different types of vent pipe. 2. Additional cost for materials and labor. 3. Space requirements Sovent System The Sovent System is a recent development in drainage installation suitable for tall buildings. This new concept of plumbing has almost completely eliminates the vent stack and other forms of ventilation, but still attained, the desired functions and effectiveness. Mechanics of the sovent system. The introduction of the sovent system is an improvement of the traditional to line drainage system. While the later maintain a separate line of ventilating the system, the former to the contrary, eliminate the use of this ventilation lines, but still maintained the balance atmospheric pressure required inside the pipe. How the sovent system function 1. A larger amount of waste and sewage discharges from the upper floor fixtures could form a slug-like(bullet) pressing or pushing the air downward the pipe creating two kinds of forces: pressure and suction. 2. The downward force classified as plus pressure, will induce back flow of water seal inside the P-trap of lower fixtures. Likewise, the suction force called minus pressure will siphon and pull down the water seal of the fixtures and create a trap seal loss. 3. The sovent function is to change the solid nature of the effluent by scattering them into drops of small blobs to fall like liquid in a shower. 4. Although the effluent rarely fills the soil pipe completely , still it has the action of plunger. Gases are push down ahead of it creating a suction or negative pressure above it. 5. This negative pressure has to be neutralized. Otherwise, it will create a suction force to pull or siphon the water seal inside the fixture traps. 6. The sovent system being a single soil stack drainage system (see fig.12-2) reduces the positive and negative pressure, to bring down the atmospheric value down below the holding capacity of the water inside the trap. Therefore, installation of the vent piping is not necessary. 7. The sovent action, of reducing the positive and negative atmospheric pressure, is done at each floor where the aerator is installed. By the action of the aerator, foam was produced, avoiding the possibility of filling the pipe entirely by the liquid effluent. By creating a shift plunger, pressure variation in the single soil stack, is minimized. 8. The effluent that was already exposed to air, falling down from the upper floors, is diverted in the soil stack at each lower floor. The aerated fitting device, accommodate the passage of this diverted flow, including the air space wherein the effluent from local soil branch or waste pipe can drop. 9. The aerator spatters or scatters the effluent in drops in small blobs wherein they are mixed with the air, forming a rarefied mixture of air and liquid, the effluent which is already converted into a small blobs and mixed with air falling at the base of the soil stack, cannot produce either plus, or minus pressure for more than 25mm water gauge. Therefore, a water seal 50mm high is safe against siphoning or back flow. 10. At the bottom portion of the single stack sovent, the aerated effluent is compacted. A process that is supported by baffle in the aerator fittings. Air that is filing up at this point discharge pipe. Sovent drainage stack system comparative piping layout of DWV& ventless sovent system The Sovent Deaerator consists of: 1. Air separation chamber with internal nose piece 2. A stack inlet, 3. A pressure relief outlet at the top, and 4. A stack outlet at the bottom. The Deaerator fittings, functions in combination with the aerator fitting above, to make a single stack self venting. The deaerator is designed to overcome tendency of the falling waste to stock up excessive back pressure at the bottom of the stack when the flow is decelerated by the bent into the horizontal drain. Materials and design The srcinal material used for Sovent is copper, attributed to its proven record of quick and trouble free installation. The same material used for the 21 storey Hyatt Hotel in Phoenix now serving more than 50,000 dwelling units in the United States mainly on high rise structures. Aerator and Deaerator When the Sovent system was introduced, the material used for the Aerator and Deaerator fittings was copper . The Aerator is used as terminal of the soil branch in each floor, and the Deaerator is installed at the bottom portion of the soil stack where the house drain is connected to receive the discharge from the Aerator.
