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Eductors
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 Eductors
(also known as jet pumps ejectors, and Venturi pumps) are the most
efficient way to pump or move many types of liquids and gases in
the petrochemical, process, and power industries. Each ultra-smooth
unit complies with ASME/ANSI B16.5 standards. The Tank Liquid Agitator
(TLA), with no moving parts, can be used in a wide variety of open
vessels or closed tanks. "In-tank" mounting eliminates
the need for costly mounting structures above tanks, while investment
costs are minimized by utilizing existing transfer pumps.
Water jet eductors utilize the kinetic energy of one
liquid to cause the flow of another. Eductors consist
of a converging nozzle, a body and a diffuser and resemble
syphons in appearance. In operation, the pressure energy
of the motive liquid is converted to velocity energy
by the converging nozzle. The high velocity liquid
flow then entrains the suction liquid. Complete mixing
of the motive and suction is performed in the body
and diffuser section. The mixture of liquids is then
converted back to an intermediate pressure after passing
through the diffuser.
Tank Eductors are designed for "in-tank"applications. The TLA operates on the principle of flow dynamics pressurized fluid is accelerated through the nozzle to become a high velocity stream that entrains tank contents and intimately mixes with them. This combined stream exits the TLA at a high velocity creating a flow field capable of causing additional agitation and mixing the tank contents. |
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| Selection Guide: |
| Models
for Pumping Liquids ( More Info.) |
SL |
ML |
HL |
SG |
HG |
| Operating Media |
Liquid |
Liquid |
Liquid |
Steam |
Steam |
| Operating Pressure (PSIG) |
15-200 |
15-200 |
15-200 |
30-150 |
20-150 |
| Pressure Recovery % |
10-15 |
30-35 |
40-50 |
15-20 |
30-35 |
| Maximum Suction Lift |
27 ft |
27 ft |
27 ft |
20 ft |
20 ft |
| Maximum NPSH Required |
3 ft |
3 ft |
3 ft |
13 ft |
13 ft |
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| Download
Our Eductors
Liquid Pulling Liquids Brochure - 1.07 MB PDF |
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| Models
for Pumping Gases ( More Info,) |
ML |
HL |
SG |
HG |
| Operating Media |
Liquid |
Liquid |
Steam, Air |
Steam, Air |
| Operating Pressure (PSIG) |
20-200 |
15-200 |
30-150 |
20-150 |
| Maximum Vacuum |
29 in Hg |
29 in Hg |
24 in Hg |
23 in Hg |
| Discharge Pressure |
15 |
15 |
12 |
35 |
| Applications |
Evacuate, Exhaust,
Prime |
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| Download
Our Eductors
Liquids-Gases Pulling Gas Brochure - 810 KB PDF |
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| Download Our Eductors for
Heating Liquids Brochure - 718 KB PDF |
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| Download
Our Tank
Mixing Eductor Model TLA Brochure - (321 KB PDF) |
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| Advantages |
| Self Priming |
| Eductors require no priming and can be
used in either continuous or intermittent operation. |
| Simple Yet Reliable |
| Since the basic eductor has no moving
parts to wear or break, only periodic inspection is required. |
| Corrosion and Erosion Resistant |
| Because they can be made from most materials
or coated with corrosion resistant materials, eductors can be made
resistant to the corrosive effects of the liquids handled and the
environment. These units are furnished in materials such as: ductile
iron, bronze, steel, stainless steel, aluminum, PVC, FRP, Haveg,
Teflon, Kynar, and polypropylene to name just a few. |
| Automatic Control |
| Units can be adapted for automatic operation
by means of a regulating spindle or a snap valve and float arrangement. |
| Non-Electrical |
| Eductors can be used in hazardous locations
where electrically operated alternatives would require expensive
explosion-proofing. |
| Easy To Install |
| Either threaded or flanged connections
are available. Units are compact, relatively light and can be adapted
to a variety of piping configurations. |
| Low Cost |
| Water jet eductors are inexpensive in
relation to the work they do. |
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Their advanced design
provides superior flow paths for optimum performance, while the
rugged construction is your assurance of reliability on demanding
applications.
They are backed by superior application engineering services,
and can be supplied to meet tight delivery schedules.
In addition, they are offered at prices equal to or lower
than other makers of eductors, or conventional electric pumps. See
Cutaway of an Eductor |
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| Advanced
Design... Full ANSI Ratings |
 JRG/JT
Eductors feature an advanced design to assure flows better than
those of other eductors. Unlike typical cast units, which meet
only a nominal pressure rating, JRG/JT Eductors meet rigorous
ANSI specifications.
All of our eductors have a smooth specified finish for critical
flow paths. In comparison, sections of the flow paths in competitive
cast units may be left rough to keep production costs down.
Also, the mixing tube section of JRG/JT Eductors has been designed
to withstand the stress to which it will be subjected. This
is the point at which many other makes are weak and subject
to breakage during installation. All units have wrench flats
to prevent damage during installation. ( Vacuum Jet Pump Shown
At Right )
- All models full ANSI rated*
- Superior quality cast and barstock design provides superior
performance.
- Wrench flats at pipe connections prevent damage to unit
on installation and removal.
- World Class Manufacturing - per your requirements, at prices
equal to or lower than those of competitive eductors - by
an ISO 9001 certified manufacturer.
- Computer designed flow path with finishes specified to
meet maximum operating efficiency.
- *non-metal parts are not specified by ANSI.
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Providing a smooth flow
path is critical to optimum eductor performance. As a result
of this feature, the motive fluid achieves more velocity through
the eductor body, and this means more energy is used for pick-up
of the suction fluid. Also, better flow paths in the diverging
section of the eductor allow it to achieve better discharge pressures. |
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| More
Productive Than Electric Pumps- With Lower Initial & Upkeep
Costs |
| JRG/JT Eductors offer many advantages over
electric pumps. They feature design simplicity, without rapidly
rotating parts that are subject to leakage, wear and breakage.
Eductors are generally small in relation to the work they
do, and they are low in cost. They are easy to install and
require few adjustments. They are easy to inspect and clean,
and never require lubrication. In addition, they are ideally
suited for use in hazardous locations, without the need for
explosion proofing as may be required with electrical equipment. |
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| Better Technical Capabilities |
The Clark-Reliance Corporation staff has extensive experience
in eductor technology. Our engineers have the ability to
computer calculate the fluid and friction factors that
can affect eductor operation. And they are experts at computer-modeling
the performance of the eductor.
Customer service is at the base of all technical activities.
Application engineering assistance takes the form of
factory and field personnel on call for joint consultation
with customers.
In short, the JRG/JT Eductor is the best choice for
many applications. Whether it is educting liquid, gas,
steam, or solids, we have the right eductor for you. |
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| Standard Materials: |
- Carbon Steel
- Bronze
- 316SS
- Monel
- Alloy 20
- PVC
- PPL
- PVDF
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| Related Links: |
| Download
Our Eductors Liquid Pulling Liquids Brochure - 1.07 MB PDF |
| Download
Our Eductors Liquids-Gases Pulling Gas Brochure - 810 KB PDF |
| Download
Our Tank Mixing Eductor Model TLA Brochure - (321 KB PDF) |
| Download
Our Eductors for Heating Liquids Brochure - 718 KB PDF |
| See
An Eductor With Socket Weld Connections |
| Installation,
Operation & Maintenance
Manual |
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| Previous
Page |
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