Mueller Strainer - mdi

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CHEXTER™ Check Valves

Sure Check™ Check Valves

Control Cheks™

Butterfly Valves

Suction Diffusers

Models: 721, 722

CONTROL CHEK® Valves
Sizes: 2" – 14" (50 – 350mm)

Model 721 Control Check Valves by Mueller

Pressure / Temperature - Non-Shock
Model Size Rating
CWP
721 2" – 12" 200psi @ 150°F
14 bar @ 66°C
165psi @ 300°F
14" 150psi @ 150°F
10 bar @ 66°C
110psi @ 300°F
722 2" – 12" 640psi @ 100°F
44 bar @ 38°C
565psi @ 300°F
14" 500psi @ 100°F
34 bar @ 38°C
400psi @ 300°F
721: Class 125
722: Class 300

Max. temp. can be limited by seat or spring material. Consult Factory
Not Recommended for Steam Service

Typical Service

The CONTROL CHEK® valve is designed for installation in pump discharge piping where it performs triple duty. It acts as a spring loaded silent check valve, a shutoff valve, and a balancing valve. Used in conjunction with the Mueller Steam Specialty Suction Diffuser, it constitutes a compact and effective complete pump protection and isolation package.

Operation

Material

  721 722
Body and Yoke Cast Iron ASTM A126-B Ductile Iron ASTM A536
Disc Aluminum Bronze ASTM B148, C952 Aluminum Bronze ASTM B148, C952
Stem 316 SS 316 SS
Seat Guide Bronze ASTM B584, C844 Bronze ASTM B584, C844
Gland Flange Cast Iron ASTM A126-B Cast Iron ASTM A126-B
Packing Compressed Fiber Compressed Fiber
Spring 302 Stainless Steel 302 Stainless Steel
Stem Guide Ductile Iron ASTM A536 Ductile Iron ASTM A536
O-Rings EPDM EPDM

Other materials available on request.
*722G grooved end CONTROL CHEK® available. See the LOCXEND® section

Dimensions and Weights

Size Dimensions Weight
    A B C
(NPT)
 
in. mm in. mm in. mm in. mm lbs. kgs
721
2 50 8-3⁄8 213 9-5⁄8 244 1⁄2 15 34 15
2-1⁄2 60 8-7⁄8 225 9-5⁄8 244 1⁄2 15 40 18
3 80 10 254 10-1⁄8 257 1⁄2 15 50 27
4 100 14-1⁄2 368 12-5⁄8 321 1⁄2 15 100 45.4
5 125 16 406 12-5⁄8 321 1⁄2 15 155 70
6 150 18 457 17-1⁄2 445 3⁄4 20 200 90
8 200 21-1⁄2 546 18 457 3⁄4 20 350 159
10 250 25-1⁄2 648 21-3⁄4 552 1 25 480 218
12 300 30 762 24-1⁄2 616 1 25 660 300
14 350 30-3⁄8 772 24-1⁄2 622 1 25 790 359
722
2 50 9-3⁄8 238 9-5⁄8 244 1⁄2 15 39 17
2-1⁄2 60 10-1⁄4 260 9-5⁄8 244 1⁄2 15 47 21
3 80 11-1⁄4 286 10-1⁄8 257 1⁄2 15 64 29
4 100 15-5⁄8 397 12-5⁄8 321 1⁄2 15 120 54.5
5 125 16-5⁄8 422 12-5⁄8 321 1⁄2 15 173 78
6 150 19-5⁄8 499 17-1⁄2 445 3⁄4 20 230 104
8 200 23-5⁄8 651 18 457 3⁄4 20 410 186
10 250 28 711 21-3⁄4 552 1 25 550 250
12 300 31-5⁄8 803 24-1⁄2 616 1 25 730 331
14 350 - - 24-1⁄2 622 1 25 - -

Dimensions for Model 721 Control Check Valves by Mueller