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Schutte & Koerting • 2510 Metropolitan Drive • Trevose, PA 19053 • USA • tel: (215) 639-0900 • fax: (215) 639-1597 • www.s-k.com • sales@s-k.com
1
Water Jet Eductors
Bulletin 2M
Introduction
The Water Jet Eductor is a type of ejector which utilizes
the kinetic energy of a pressurized liquid to entrain
another liquid, mix the two, and discharge the mixture
against a counter pressure. Ejectors of this type are used
throughout industry for pumping and mixing operations.
Application
Water jet eductors have numerous uses in the plant such
as lifting, pumping, mixing and agitation of liquids,
granular solids and slurries. Some specific applications
are: draining flooded areas, emptying tanks and sumps,
pumping and mixing operations in oil treating systems,
dewatering sand and coal barges, introducing anti-knock
agents and coloring additives into gasoline, continuous
blending, acidifying, causticizing of oils, producing
emulsions, pumping food products, pumping sand and
filter clay, tank mixing, and various proportioning
operations. As an example of eductor performance in a
typical use, a jet eductor measuring 8
1
⁄
2
” in length will
empty a 500 gallon water tank in less than half an hour,
using water at 60 psig, as the sole source of motive
power.
Features
Self Priming Eductors require no priming and can be
used for either continuous or intermittent operation.
Simple and 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.
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 eductors are inexpensive in relation to
the work they do.
Jet ejectors can be made from most workable materials,
such as: cast iron, bronze, stainless steel, aluminum,
polyvinyl chloride, polyester fiberglass, Phenolic
Fiberglass Reinforced Plastic (FRP), Teflon
2
and
Hastelloy
3
.
A variety of types and sizes are available as noted on the
following pages. Certain variables such as pressure,
temperature, viscosity, density, operating conditions of
suction and discharge fluids, and desired results must be
considered in determining the type of eductor best suited
to your needs. S&K
engineers will work with you to select
the proper eductor for your application.
Request Performance Data Supplement 2M for operating
characteristics of water jet eductors.
Construction
Water Jet Eductors consist of only three basic
components: a converging nozzle, a diffuser (or venturi)
and a body to hold these parts in their proper relative
positions and provide a suction chamber.
Converging
Nozzle
Body - holds diffuser
and nozzle in position
Diffuser (or Venturi)
Index
Description Page
Fig. 264 Water Jet Eductor 2
Fig. 266 Water Jet Eductor 2
Fig. 264 PVC and Kynar Water Jet Eductor 3
Fig. 2645 Automatic Eductor 4
Fig. 265 Liquid Jet Eductor 5
Fig. 242 Condensate and Mixing Eductor 6
Fig. 258 Tank Mixing Eductor 7
Fig. 268 Tank Mixing Eductor 7
Fig. 254 Hopper-Equipped Eductor 9
Fig. 267 Hopper-Equipped Eductor 9
Fig. 227 Hopper-Equipped Eductor 9
Fig. 224 Water Jet Sand and Mud Eductor 10
Fig. 235 Annular Multi-Nozzle Water Jet Eductor 11
Fig. 222 Portable Eductor 12
Fig. 212 Corrosion Resistant Eductor 12
Typical Applications of S&K Water Jet Eductors 12