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Mueller Duplex Basket Stainers

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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 690 Series Class 125 Marine Duplex Basket Strainer

Closure ANSI Class End Type
Covers are bolted, clamped covers are available (limited to 150psig, 100°F) 125  
Size Range Body Material Max Working Pressure Spec Sheet
3" Bronze Body and Monel Basket 50psi WOG @150F

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Mueller 691MFA, 692MFB, 692MFD, 692MFH Large Duplex Basket Strainers

Closure ANSI Class End Type
Covers are bolted, clamped covers are available (limited to 150psig, 100°F) 691M - Class 125
692M - Class 150
Flanged
Size Range Body Material WOG Rating Spec Sheet
8" - 16" Cast Iron, Bronze, Carbon Steel, Stainless Steel: Cast Iron: 150psi @150F
Clamp Cover:
Bronze, Carbon Steel, Stainless Steel:
200psi WOG @100F
Bolted Cover:
Bronze, Carbon Steel, Stainless Steel:
150psi WOG @100F

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Mueller 791SA Ball-Plex Class 125 Duplex Strainer

Closure ANSI Class End Type
N/A Class 125 Screwed Ends
Size Range Body Material WOG Rating Spec Sheet
3/4" - 3" Cast Iron body and 304 Stainless Steel basket 175psi @-20°F to 150°F
150psi @ 250°F

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Mueller 791UFA UL Listed Ball-Plex Class 125 Duplex Strainer

Closure ANSI Class End Type
N/A Class 125 Flanged Ends
Size Range Body Material WOG Rating Spec Sheet
3/4" - 3" Cast Iron body and 304 Stainless Steel basket 200psi @-20°F to 150°F
175psi @ 250°F

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Mueller 791USA UL Listed Ball-Plex Class 125 Duplex Strainer

Closure ANSI Class End Type
N/A Class 125 Screwed Ends
Size Range Body Material WOG Rating Spec Sheet
3/4" - 3" Cast Iron body and 304 Stainless Steel basket 175psi @-20°F to 150°F
150psi @ 250°F

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Mueller 792FB, 794FB Ball-Plex Class 150 Duplex Strainer

Closure ANSI Class End Type
N/A 792FB - Class 150
794FB - Class 300
Flanged
Size Range Body Material WOG Rating Spec Sheet
1" - 6" Cast Aluminum Bronze body and 304 Stainless Steel basket 792FB
225psi @ -20°F to 150°F
195psi @ 250°F
794FB
500psi @ -20°F to 150°F
425psi @ 250°F

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Mueller 792FD, 794FD, 796FD Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A 792FD - Class 150
794FD - Class 300
796FD - Class 600
Flanged
Size Range Body Material WOG Rating Spec Sheet
1" - 1 1/2" Carbon Steel body and 304 Stainless Steel basket 792FD
285psi @-20°F to 100°F
260psi @ 200°F
794FD & 796FD
740psi @-20°F to 100°F
680psi @ 200°F

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Mueller 792FH, 794FH, 796FH Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A 792FH - Class 150
794FH - Class 300
796FH - Class 600
Flanged
Size Range Body Material WOG Rating Spec Sheet
1" - 1 1/2" Stainless Steel body and 304 Stainless Steel basket  792FH
275psi @-20°F to 100°F
195psi @ 400°F
794FH & 796FH
720psi @-20°F to 100°F
515psi @ 400°F

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Mueller 792MFD, 794MFD, 796MFD Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A 792MFD - Class 150
794MFD - Class 300
796MFD - Class 600
Flanged
Size Range Body Material WOG Rating Spec Sheet
2" - 6" Carbon Steel body and 304 Stainless Steel basket 792MFD
285psi @-20°F to 100°F
260psi @ 200°F
794MFD & 796MFD
740psi @-20°F to 100°F
680psi @ 200°F

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Mueller 792SB, 794SB Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A 792SB - Class 125
794SB - Class 250
Screwed End 
Size Range Body Material WOG Rating Spec Sheet
3/4" - 3" Aluminum Bronze body and 304 Stainless Steel basket 792SB
200psi @-20°F to 150°F
180psi @ 250°F
794SB
400psi @-20°F to 150°F
395psi @ 250°F

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Mueller 792SD, 794SD Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A 792SD - Class 125
794SD - Class 250
Screwed End 
Size Range Body Material WOG Rating Spec Sheet
3/4" - 3" Carbon Steel body and 304 Stainless Steel basket 792SD
285psi @-20°F to 100°F
260psi @ 200°F
794SD
740psi @-20°F to 100°F
680psi @ 200°F

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Mueller 792MFH, 792MFH, 796MFH Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A 792MFH - Class 150
794MFH - Class 300
796MFH - Class 600
Flanged
Size Range Body Material WOG Rating Spec Sheet
2" - 6" Stainless Steel body and 304 Stainless Steel basket 792MFH
275psi @-20°F to 100°F
235psi @ 200°F
794MFH & 796MFH
720 psi @ -20 to 100°F
620psi @ 200°F

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Mueller 794SH Ball-Plex Duplex Strainer

Closure ANSI Class End Type
N/A Class 300
Screwed End 
Size Range Body Material WOG Rating Spec Sheet
3/4" - 3" Stainless Steel body and 304 Stainless Steel basket 275psi @-20°F to 100°F
195psi @ 400°F

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