Mueller Strainer - mdi

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Models 691MFA, 692MFB, 692MFD, 692MFH

Large Duplex Strainers
Sizes: 8"-16" (200 - 400mm)

Model 691MFA Large Duplex Strainers by Mueller

Pressure / Temperature - Non-Shock (With Clamped Covers)
Model Size CWP
691MFA 8"-16" 150psi @ 150°F
(10.3 bar @ 38°C)
691MFB 8"-16" 150psi @ 150°F
(10.3 bar @ 38°C)
691MFD 8"-16" 150psi @ 150°F
(10.3 bar @ 38°C)
691MFH 8"-16"
150psi @ 150°F
(10.3 bar @ 38°C)
Pressure/Temperature –Non-Shock
(with Bolted Covers)
691MFA
8"-12" CWP 14"-16" CWP
150 PSI @ 150°F 150psi @ 150°F
(10.3 bar @ 38°C) (10.3 bar @ 38°C)
150 PSI @ 250°F 150psi @ 250°F
691MFB
8"-12" CWP 14"-16" CWP
200 PSI @ 150°F 150psi @ 150°F
(15.5 bar @ 38°C) (10.3 bar @ 38°C)
175 PSI @ 250°F 150psi @ 250°F
691MFD
8"-12" CWP 14"-16" CWP
200 PSI @ 100°F 150psi @ 150°F
(19.6bar @ 38°C) (10.3 bar @ 38°C)
175 PSI @ 250°F 150psi @ 250°F
691MFH
8"-12" CWP 14"-16" CWP
200 PSI @ 100°F 150psi @ 150°F
(19 bar @ 38°C) (10.3 bar @ 38°C)
80 PSI @ 400°F 150psi @ 250°F

Strainers provide economical protection for costly pumps, meters, valves, and other
similar mechanical equipment by straining foreign matter from the connected piping system.
Installation of a strainer before mechanical equipment can ensure trouble free service and
avoid costly shutdowns for repair or replacement of equipment damaged by foreign matter.
The size of the perforation or mesh in the basket screen will determine the smallest particles
captured. See Strainer Information section of the Mueller Steam Specialty binder for detailed
information including sizes and materials available.

Typical Service

Features

Construction

Baskets

Model Sizes Standard (Water)
Material Opening
691MFA 8" - 16" 304SS 0.125 perf
692MFB
692MFD
692MFH

Material

Body 691MFA 692MFB 692MFD 692MFH
Cast Iron ASTM A126 B Bronze ASTM B62 (85-5-5-5) Carbon Steel ASTM A216 WCB Stainless Steel ASTM A351 CF8M
Cover Plate A516-70 Bronze Plate Carbon Steel Plate 516-70 Stainless Steel Plate A240-316
Seat Bronze Bronze Bronze A351-CF8M
Shaft 316SS 316SS 316SS 316SS
O-ring Seals Buna-N Buna-N Buna-N Buna-N

Dimensions and Weights

Size Dimensions Weight
    A B C E
Screen Removal
F G H    
in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm lbs. kgs.
8 200 20 508 19 483 24-9⁄16 623 62 1575 54-3⁄4 1391 1 25 2 50 1365 620
10 250 24 610 20-1⁄2 521 28-3⁄4 730 72-1⁄2 1842 61 1549 1 25 2 50 1970 894
12 300 30 762 25-1⁄2 648 30-3⁄4 781 87-1⁄2 2223 65-7⁄8 1673 1 25 2 50 2800 1272
14 350 32 813 27-7⁄8 708 30-1⁄8 765 95-1⁄2 2426 71 1803 1 25 2 50 3300 1500
16 400 36-3⁄4 933 32 813 34-3⁄4 883 80-1⁄2 2045 80-1/2 2045 1-1⁄2 40 2 50 4400 2000

Dimensions for model 691 Bronze Strainer by Mueller