Sunday, March 30, 2014

Penberthy GH/GL Eductors for Gases

Penberthy/Pentair GL/GH Eductors (jet pumps) for pumping/heating with gas from Flow Factor

Pumping gases using a liquid or gas (steam or air) motive is an effective means of exhausting, evacuating and priming and can be used in a wide variety of operations and industries. These Pentair Penberthy Jet Pumps offer many advantages over other methods of moving gases; they have no moving parts and provide a very simple cost effective method of handling a wide variety of gases and processes. These units are used for all aspects of water treatment, refrigeration, petroleum, petro chemical, brewing, distilling and general process industries.

Features & Benefits:
  • Simple two-piece construction
  • No moving parts to wear out
  • No lubrication
  • Wide variety of special material to suit the most diverse applications
  • Virtually maintenance free
  • Cost effective and inexpensive
  • No power or special installation requirements  

Sizes: 1/2” to 12”
Threaded (Standard) or flanged connections

Operating Pressure Range 20 to 200 psig

Application Range, inches HG. ABS. 0.5 to 30

Bronze, Ductile Iron, Carbon Steel, Stainless Steel, PVC, PP, PVDF
Wide variety of special materials also available  

Penberthy jet pumps can also use steam or a gas (air) as the operating media for exhausting, evacuating or priming operations. Primary uses of these types of pumps are for exhausting or evacuating gases. Exhausting means removing gases from an area at a continuous rate while maintaining pressure at a constant level. Evacuation means drawing gases from a defined volume by pumping the vessel down from an initial pressure to a final lower pressure. These steam/gas motive jet pumps meet the industry's most stringent requirements, while providing a simple, low-cost method of transporting gases, operating flawlessly even in the harshest work environments.
Penberthy Models GL and GH operate at pressures from 20 to 120 psig (140 to 830 kPag), the overall capacity being slightly higher when using air as the operating media. U and L Models are single-stage ejectors while the 2NC is a two-stage, non-condensing ejector using steam as the operating media. All these units provide maintenance-free pumping capabilities.
Some uses for steam/gas motive jet pumps include: creating vacuums, exhausting vapors from process systems, evacuating tanks & vessels, priming, fume removal, fluid concentration, humidifying and drying. Industries that could benefit from the use of the jet pumps might include: chemical processing, textile manufacturing, food processing, petroleum production & refining, sterilization and HVAC.

Typical applications involve either exhausting or evacuating. Similar information is needed in order to determine the specific jet pump for your application. Using the information required (listed below), fill out an application form and submit to Penberthy sales representative or the factory to determine the correct pump for your needs.
If Exhausting (Continuous Suction Flow)

  • Gas/Steam
  • Pressure (Available)
  • Flow Rate (Available volume-scfm)
  • Temperature
  • Molecular Weight (Gas only)
  • Pressure (Inches Hg Abs-kg/sq cm Abs)
  • Flow Rate-scfm
  • Temperature
  • Molecular Weight
  • Pressure (That unit must overcome)

If Evacuating (Sealed Vessel-Pump Down)
  • Volume of Space to Evacuate
  • Required Evacuation Time (Minutes)
This function is the power phase of the pumping operation. At this stage, the velocity of the motive media increases as it passes through a nozzle. This phase of the pumping operation takes advantage of the kinetic properties of the motive media, whether it is liquid, steam or gas. Because of this, design differences may exist within the motive connection of the jet pump. For instance, jet pumps with liquid motives use a converging nozzle, since liquids usually cannot be compressed. On the other hand, jet pumps with gas or steam motives use converging/diverging nozzles to achieve trans-sonic flow velocity. The critical flow paths of all Penberthy jet pumps are smoothly machined with no abrupt turns or steps in order to produce the most efficient flow during the motive function. Without this direct flow design and smooth interior surface, the jet pump would not operate at peak efficiency.
This connection of the jet pump is where the pumping action takes place. The high velocity stream of the motive causes a drop in pressure in the suction chamber. This allows pressure in the suction vessel to push a liquid, steam or gas into the suction chamber of the jet pump. This, in turn, is entrained by the high-velocity motive stream emerging from the inlet nozzle
As the motive flow combines with the suction medium, some kinetic energy of the MOTIVE is transferred to the SUCTION, mixing and discharging at a reduced pressure. The amount of pressure that can be recovered depends on the ratio of the MOTIVE flow to SUCTION flow, plus the amount of SUCTION pressure built up in the suction vessel. Kinetic energy is converted back to pressure as the mixed media passes through the diverging taper and is discharged out the pump.

GL series jets have a motive pressure range of 60-120 psig and suction range of 6-30 inches.
GH series jets have a motive pressure range of 20-80 psig and a suction range of 6.5-30 inches.
Cast eductors can be made from 1/2 inch size to 4 inch size.
Fabricated eductors are 4 inches and up.
Non-Metallic are 1/2 to 3 inch size, these are PVC, Poly Pro, and Kynar.
The common metals are Cast Iron, Low Lead Bronze, Carbon Steel and 316L Stainless Steel.