Inline & Tank Eductors for Pumping | Mixing | Heating
Inline & Tank Eductors for Pumping | Mixing | Heating

Penberthy Model CTE

Penberthy Model CTE can be used as a tank mixing or tank heating eductor.

Penberthy Model CTE
Penberthy Model CTE

Penberthy Model CTE’s (Circulating Tank Eductors) are designed for in tank mixing of liquids as the motive fluid, and for in tank heating of liquids using steam as the heating and motive fluid.

Mixing is accomplished first within the CTE as the motive liquid entrains the tank contents into the suction openings, and thoroughly mixes with the unit before being discharged. The discharge flow, or plume, provides further mixing and agitation within the tank. The motive liquid can be drawn from the tank, or it can be a second liquid drawn from another source.

Heating is accomplished by direct condensation of steam in the liquid. The motive steam also includes the liquid to flow into the suction openings and discharge from the CTE. The discharge flow or plume provides further mixing and circulation to promote even temperature distribution.

A CTE can be mounted in any position. The supply line and manifold piping to multiple CTE’s must be sized to supply uniform pressure to each CTE.

It is important that the Penberthy Model CTE be positioned within the tank so as to insure the free flow of liquid to be mixed or heated into and out of the unit(s). The greatest agitation occurs within the discharge plume; therefore, the discharge end should be aimed towards the most remote part of the tank. On the other hand, the intake end of the unit must be far enough from the tank corner or wall to allow the free flow of liquid into the suction openings.

Tank shape and size influence the placement and number of CTE’s required to maintain even agitation or temperature distribution. With a spherical tank, a single CTE mounted as shown in Figure 2 makes the best use of the mixing and heating characteristics of the CTE. With no corners to impede liquid flow, the liquid circulates evenly and undisturbed.

In a cylindrical, square, or rectangular tank, the angular intersection of surfaces can interrupt liquid flow patterns and cause liquid stagnation in these areas. A single CTE mounted as shown in Figure 3 will minimize this. Whenever the ratio of length to diameter of the tank is greater than 2:1 (such as tank trucks or railroad cars), it is recommended that multiple CTE’s be used.

1. For Mixing

  1. Operating liquid supply line pressure loss must be taken into account when applying CTE’s.
  2. Supply line must be clean and should be provided with a strainer to prevent foreign materials from clogging mixer.
  3. CTE’s must be fully submerged to prevent liquid from splashing and drawing atmospheric air, and to promote maximum mixing.
  4. Clearance should be provided for removal of the CTE.
  5. Provisions should be made for a pressure gage connection at or near the CTE inlet. It may become necessary to install a pressure gage if operating difficulties are encountered.
  6. Inlet piping must be secured to the tank wall near the CTE to keep strain off piping when in operation.
  7. Supply line and manifold piping must be sized to supply adequate pressure equally to each CTE when multiple CTE’s are used.

2. For Heating

  1. Steam must not have more than 20°F (-7°C) of superheat, or performance will differ from that published on Penberthy Technical Data Bulletin or product proposal referred to above.
  2. Steam line pressure loss must be taken into account when applying CTE’s.
  3. Steam line must be clean and should be provided with a strainer to prevent foreign materials from clogging heater.
  4. Steam line must be insulated and as short as possible to prevent condensation and friction losses.
  5. CTE’s must be fully submerged to prevent liquid from splashing and to promote condensation.
  6. Clearance should be provided for removal of the CTE.
  7. Provisions should be made for a pressure gage connection at or near the CTE inlet. It may become necessary to install a pressure gage if operating difficulties are encountered
  8. Steam piping must be secured to the tank wall near the CTE to keep strain off piping when in operation.
  9. Steam supply valve must be a quick opening type installed as close to the CTE as practical.

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