Liquid seal ring pump

Figure 6-110. Typical performance curves for steam jet ejectors, liquid ring pumps, and rotary piston oil-sealed pumps. By permission, Ryans, J. L. and Roper, D. L. [24],...

Internal Cake Tube Filters or Liquid Bag Filters This type of filter, such as manufactured by Industrial Filter and Pump Mfg. Co., Rosedale, Illinois, and many others, utilizes one or more perforated tubes supported by a tube sheet or by the lip of the pressure vessel. A cylindrical filter bag sealed at one end is inserted into the perforated tube. The open end of the filter bag generally has a flange or special seal ring to prevent leakage. 

Liquid seal pumps are frequently employed as mechanical pumps in the coarse vacuum range. During the pump s rotation, a water ring forms as a result of centrifugal... 

In the chemical industry, many processes are operated at reduced pressure (between 2000 Pa and atmospheric pressure). Liquid ring pumps, which are displacement pumps, are widely used for pressure reduction. The working liquid of a liquid ring pump must perform the functions of a piston, a seal, and a heat absorber. 

The desorbed vapor is transported from the adsorption bed via a vaeuum pump. A liquid ring pump using water for the seal fluid is normally applied for safety purposes in operations where air is allowed to enter the adsorbers. 

Applications and uses medical implants, sealing rings, bearings, piston parts, pumps, high pressure liquid chromatography (HPLC) columns, compressor plate valves, and cable insulation. 

Liquid-ring pumps require shaft seals. A simple lantern-ring arrangement appears on some models and requires a flow of cooling liquid. Recycled liquid is acceptable in this duty. However, mechanical seals are preferred in most chlorine-handling applications. Double seals with separate supplies of clean fluid are the standard. 

Ali mechanicai pumps are assumed to be eiectricaiiy driven. The curve for two-stage liquid-ring pumps assumes that the sealing fluid will have a vapor pressure less than 1 torr at 20°C. 

The prepared sample of a given mass is placed in the combustion chamber. The electric ignition system, with black powder as the ignition charge, is prepared, and the vessel is closed by the screw cap and the sealing rings. After that, the air from the combustion chamber is evacuated by a vacuum pump up to 0.1 bar. Then the liquid for the maintenance of constant temperature is allowed to circulate. When the temperature stabilises, the sample may be ignited. 

For evacuation of solvent vapor from the work chamber, a liquid ring pump is used. The seal liquid is cooled clean solvent. The warmed seal liquid is circulated through a clean solvent holding tank. No oil ever contacts solvent ... 

Eliminate close-clearance wide sealing rings at the impeller eye and provide knife-edge seals (one or two) similar to those used on blowers. Leakage loss becomes secondary when pumping viscous liquids. 

---