Mueller Strainer - mdi

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Model 303

Screwed End Silent Check Valves
Sizes: 1/4" – 2" (8 – 50mm)

Model 303 Sure Check Valves by Mueller

Pressure / Temperature - Non-Shock
Model Material Rating
303AP
303AT
Cast Iron 200psi@150° F
303BP Bronze 400psi@150° F
303HT Stainless Steel 600psi@150° F

Max. temp. can be limited by seat or spring material. Consult Factory

Typical Service

Features

Construction

Installation

Ordering Information

Material

  303AP 303AT 303BP 303HT
Body Cast Iron, ASTM A126 Gr. B Cast Iron, ASTM A126 Gr. B Bronze, ASTM B62 Stainless Steel, ASTM A351 CF8M
Cap 12L14 CRS Carbon Steel 12L14 CRS Carbon Steel Bronze ASTM B62 Stainless Steel, ASTM A351 CF8M
Guide Pin 420 SS 420 SS 420 SS 420 SS
Disc Brass ASTM B505 Stainless Steel, ASTM A351 CF8M Brass ASTM B505 Stainless Steel, ASTM A351 CF8M
Seal EPDM EPDM EPDM Viton®
Gasket Compressed Fiber Compressed Fiber Compressed Fiber Compressed Fiber
Spring 302 Stainless Steel, ASTM A276 302 Stainless Steel, ASTM A276 302 Stainless Steel, ASTM A276 302 Stainless Steel, ASTM A276

Dimensions and Weights

Size Dimensions Weight
    A B AP AT BP BP
in. mm in. mm in. mm lbs. kgs. lbs. kgs. lbs. kgs. lbs. kgs.
1⁄4 8 2-3⁄8 60 1-3⁄4 44 1 0.45 1 0.45 1 0.45 1 0.45
3⁄8 10 2-3⁄8 60 1-3⁄4 44 1 0.45 1 0.45 1 0.45 1 0.45
1⁄2 15 2-3⁄8 60 1-3⁄4 44 1 0.45 1 0.45 1 0.45 1 0.45
3⁄4 20 2-3⁄4 70 1-15⁄16 49 1 .51 1 .54 1 .54 1 0.54
1 25 3-15⁄16 84 2-7⁄16 60 2 .82 2 .91 2 .97 2 .97
1-1⁄4 32 4-1⁄8 111 3-3⁄8 86 4 1.95 5 2.1 5 2.27 5 2.2
1-1⁄2 40 4-1⁄8 111 3-3⁄8 86 4 1.9 4 2.0 5 2.15 5 2.1
2 50 4-15⁄16 125 4-1⁄16 102 6 2.86 7 3.1 8 3.46 8 3.4

Dimensions for Model 303 Silent Check Valves by Mueller