Large Duplex
Dual strainers for continuous service
( Duplex H Type - 8" to 36" bore )
The Duplex H Type strainers are designed for larger size applications where interruption
of the flow for basket cleaning is not permitted. This range of duplex strainers
employs a simple, method for changeover using two sliding gate valves, operated
manually by screwed shafts via an external handwheel. Operating shafts are interconnected
for simultaneous operation, thus eliminating any possibility of completely shutting
off the liquid flow. Provided with a valve position indicator showing which chamber
of the filter is on stream. Access to the filter baskets is through quick release
covers.
The light weight baskets are quickly and easily removed for cleaning without the need for any tools, lifting gear or specialised knowledge, with minimum down time.
Standard Features
- Multiple lightweight baskets for easy handling.
- Sliding gate type
valves with positive compression seating.
- Stepped
angled basket seat for minimum pressure
drop and positive basket seating.
- Robust
basket support cages complete with
replaceable mesh inserts (when required) reducing spares
holding and operating cost.
- Quick release covers for convenient basket
removal without the need for tools
or lifting gear.
- Resilient cover 'O' seals.
- Filtration - 2mm dia. perforations down
to 45 microns (coarser filtration available).
- External
valve position indicator showing
which chamber is on stream.
- Replaceable valve
seats.
- Synchronised chain drive.
- Standard in cast iron and cast steel, all
fitted with baskets and inserts as required.
- External
pressure equalising valve.
- Flanged to
ANSI Class 125FF and Class 300RF, can
be grilled to ASME Class 150, BS tables
and DIN standards.
Optional Features
- Internal protective coatings.
- Automatic valve changeover operation.
- Cathodic protection for seawater
service.
- Reinforced baskets to withstand
high differential pressures.
- Automatic
backflushing facilities for both
suction and discharge duties.
- Magnetic element assemblies.
- Pleated baskets for higher filtration
area.
- DP gauges and switches.
- Flanged vents and drains.
Specials
- Cast or fabricated units for higher working pressures.
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