Eaton 53BTX style duplex strainer uses a special ball valve-like
diverting cartridge to divert flow from one chamber to another and it is available in cast iron, steel, 316SS and bronze with ¾" to 4"
connections. The Eaton 53BTX has a compact, low profile design to fit into
spaces other duplex strainers cannot, yet it still uses full-size strainer
baskets and provides a low pressure drop performance. When comparing
different brand duplex strainers, always compare the clean differential
pressure for your intended flow rate and particle retention size.
Prior to this innovation, most duplex strainers in
this size range had a tapered plug vavle design similar to
Eaton's model 50 duplex strainers
(5" through 8" sizes). A tapered plug vavle design relies ona
metal-to-metal sealbetween the valve and vavle seat. First the
valve is lifted off the seat and next the valve can be actuated to
divert the flow to the clean chamber. The metal-to-metal seal is
prone to leakage and once the valve seat wears the entire strainer needs
replacement. The Eaton 53BTX duplex strainer has replaceable ball
valve style seals which provide better sealing and extend the life of
the strainer body.
The diverting cartridge valve design contributes to both easier and safer
strainer basket servicing by almost eliminating seepage during basket chamber
access. This increases the time available to clean or replace the strainer basket without
having to worry about leakage and overflow. Thus it also reduces fugitive
emmissions and clean up after servicing the strainer basket.
When a strainer basket needs to be cleaned, the lever handle
is turned to take it out of service and to divert flow through the other
chamber. The position of the handle clearly indicates at all times which chamber
is in service. No special tools are needed to access the strainer basket for
cleaning. First you vent the chamber, next you drain it and finally the cover is lifted and swung
clear of the chamber opening enabling you to grab the stainer basket by its
handle and remove it from the strainer.
The flow diverting cartridge does not require manual internal
or external ball support adjustments and the low operating torque means the
strainer can be operated with an easily without the use of tools. A double sealing
system on both the upper and lower stems guards against leakage. Special
reinforced polymer seats are used for extended service life. Should cartridge
service become necessary, it’s easy to accomplish by removing four bolts.
The cartridge comes right out through the top of the strainer. There is no need
to take the strainer completely apart or to remove it from the pipeline.
Eaton model 53BTX Catalog Pages and Outline Drawings
maximum flow range for each size duplex strainer are based upon maintaining a minimum fluid velocity of 4 feet per second
and a maximum of 2 PSI clean pressure drop with the standard perforated basket
for that size. Using the "2 PSI guideline", the maximum resulting fluid
velocity is approximately 6 feet per second. It is okay to increase the
flow rate a little as long as the clean differential pressure drop is within
Use the navigation menu above and select the
desired material of construction, this will bring you to a chart of all the
sizes and designs available in that material along with links to
customizable datasheets and outline drawings.