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Mueller Duplex Basket Strainers

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Mueller Steam Specialty Duplex basket-type strainers are suitable for continuous flow applications where the process cannot be shut down for cleaning. They provide protection for mechanical equipment by straining foreign matter from the connected piping system. These systems include cooling water, compressors, condensers, fire lines, fuel lines, chemical process systems, pump suction applications and other similar services. For these applications, the Mueller Steam Specialty Duplex Strainer is the perfect choice. For sizes 3⁄4" through 6", the Revolutionary Ball-Plex™ duplex strainer from Mueller Steam Specialty has all of the features you need. Bubble tight seating, true in-line maintainability, extremely easy seat replacement and long, trouble-free service life in a very simple and rugged design. 

All of the Ball-Plex™ units are standard with 316 SS balls and PTFE seats. Other alloys are also available for the balls. Available from stock in cast iron, bronze, carbon steel and stainless steel. Other alloys are also available. Threaded and flanged units are available with full rated pressures from Class 125 to Class 300 (Class 600 flanges also available). With the floating ball design and relatively low torque requirements, it is very easy to automate these units for remote operation.

If you have any questions, call one of our strainer specialists at (866) 777-8001 or Request a Quote.

Mueller Duplex Strainers Summary
Model / Series Size Range & Body Material Closure & End Type ANSI Class & WOG Rating Documentation & Quote
Mueller 690 Series Class 125 Marine Duplex Basket Strainer
690 Series Size Range: 3"
Body Material: Bronze Body and Monel Basket
Closure: Bolted Covers (Clamped avail. limit 150psig, 100°F)
End Type: N/A
ANSI Class: 125
WOG Rating: 50psi WOG @150F
Spec Sheet
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Mueller 691MFA, 692MFB, 692MFD, 692MFH Large Duplex Basket Strainers
691MFA, 692MFB, 692MFD, 692MFH Size Range: 8" - 16"
Body Material: Cast Iron, Bronze, Carbon Steel, Stainless Steel
Closure: Bolted Covers (Clamped avail. limit 150psig, 100°F)
End Type: Flanged
ANSI Class: 691M - 125, 692M - 150
WOG Rating: Cast Iron: 150psi @150F. Clamp/Bolted Cover options vary.
Spec Sheet
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Mueller 791SA Ball-Plex Class 125 Duplex Strainer
791SA Size Range: 3/4" - 3"
Body Material: Cast Iron body and 304 Stainless Steel basket
Closure: N/A
End Type: Screwed Ends
ANSI Class: 125
WOG Rating: 175psi @-20°F to 150°F, 150psi @ 250°F
Spec Sheet
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Mueller 791UFA UL Listed Ball-Plex Class 125 Duplex Strainer
791UFA UL Listed Size Range: 3/4" - 3"
Body Material: Cast Iron body and 304 Stainless Steel basket
Closure: N/A
End Type: Flanged Ends
ANSI Class: 125
WOG Rating: 200psi @-20°F to 150°F, 175psi @ 250°F
Spec Sheet
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Mueller 791USA UL Listed Ball-Plex Class 125 Duplex Strainer
791USA UL Listed Size Range: 3/4" - 3"
Body Material: Cast Iron body and 304 Stainless Steel basket
Closure: N/A
End Type: Screwed Ends
ANSI Class: 125
WOG Rating: 175psi @-20°F to 150°F, 150psi @ 250°F
Spec Sheet
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Mueller 792FB, 794FB Ball-Plex Duplex Strainer
792FB, 794FB Size Range: 1" - 6"
Body Material: Cast Aluminum Bronze body and 304 Stainless Steel basket
Closure: N/A
End Type: Flanged
ANSI Class: 792FB - 150, 794FB - 300
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 792FD, 794FD, 796FD Ball-Plex Duplex Strainer
792FD, 794FD, 796FD Size Range: 1" - 1 1/2"
Body Material: Carbon Steel body and 304 Stainless Steel basket
Closure: N/A
End Type: Flanged
ANSI Class: 792FD - 150, 794FD - 300, 796FD - 600
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 792FH, 794FH, 796FH Ball-Plex Duplex Strainer
792FH, 794FH, 796FH Size Range: 1" - 1 1/2"
Body Material: Stainless Steel body and 304 Stainless Steel basket
Closure: N/A
End Type: Flanged
ANSI Class: 792FH - 150, 794FH - 300, 796FH - 600
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 792MFD, 794MFD, 796MFD Ball-Plex Duplex Strainer
792MFD, 794MFD, 796MFD Size Range: 2" - 6"
Body Material: Carbon Steel body and 304 Stainless Steel basket
Closure: N/A
End Type: Flanged
ANSI Class: 792MFD - 150, 794MFD - 300, 796MFD - 600
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 792SB, 794SB Ball-Plex Duplex Strainer
792SB, 794SB Size Range: 3/4" - 3"
Body Material: Aluminum Bronze body and 304 Stainless Steel basket
Closure: N/A
End Type: Screwed End
ANSI Class: 792SB - 125, 794SB - 250
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 792SD, 794SD Ball-Plex Duplex Strainer
792SD, 794SD Size Range: 3/4" - 3"
Body Material: Carbon Steel body and 304 Stainless Steel basket
Closure: N/A
End Type: Screwed End
ANSI Class: 792SD - 125, 794SD - 250
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 792MFH, 794MFH, 796MFH Ball-Plex Duplex Strainer
792MFH, 794MFH, 796MFH Size Range: 2" - 6"
Body Material: Stainless Steel body and 304 Stainless Steel basket
Closure: N/A
End Type: Flanged
ANSI Class: 792MFH - 150, 794MFH - 300, 796MFH - 600
WOG Rating: Varies by model and temp (see Spec Sheet for details)
Spec Sheet
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Mueller 794SH Ball-Plex Duplex Strainer
794SH Size Range: 3/4" - 3"
Body Material: Stainless Steel body and 304 Stainless Steel basket
Closure: N/A
End Type: Screwed End
ANSI Class: 300
WOG Rating: 275psi @-20°F to 100°F, 195psi @ 400°F
Spec Sheet
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