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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