Mueller Strainer - mdi

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Models: 87, 88

Ductile Iron Wafer and Full Lug Butterfly Valves
Sizes: 2" – 24" (25 – 60mm)

Model 87 Butterfly Valves by Mueller

Pressure / Temperature - Non-Shock
Model Sizes Material Rating
87 2"-12" Ductile Iron 200psi
87 14"-24" Ductile Iron 150psi
88 2"-12" Ductile Iron 200psi
88 14"-24" Ductile Iron 150psi

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

Typical Service

These soft-seated butterfly valves are designed for a variety of general applications in the control of water, air, oil, gases, and corrosive media. They are equally effective for on-off, throttling, or isolation service requirements. Lug style valves are designed for dead-end service to the full pressure rating of the valve. Models 87 and 88 butterfly valves are especially well suited for higher velocity service and vacuum service.

Features

Performance Guidelines

Material

  Model 87, Model 88
Body Ductile Iron
Stem 416SS, 316SS, 431SS
Disc Ductile Iron, Aluminum Bronze, 316SS
Seat EPDM - 5ºF to 250ºF (-15ºC to +121ºC) Buna-N - 14ºF to 176ºF (-10ºC to +80ºC)

Note: Do not use EPDM when hydrocarbons are present

Dimensions and Weights

Size Dimensions
  A B C D E F G H I J
in. in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm
2 10-3⁄4 273 6-3⁄8 161 1-5/8 42 1-1⁄4 32 2-1⁄8 54 3-1⁄16 77 10-1⁄2 267 1/2 13 3-3⁄4 95 3⁄8 9
2-1⁄2 11-5⁄8 295 6-7⁄8 175 1-3⁄4 45 1-1⁄4 32 2-1⁄2 64 3-1⁄16 77 10-1⁄2 267 1⁄2 13 4-1⁄4 108 3⁄8 9
3 12-1⁄8 308 7-1⁄8 181 1-3⁄4 45 1-1⁄4 32 3-1⁄8 79 3-1⁄16 77 10-1⁄2 267 1⁄2 13 4-3⁄4 120 3⁄8 9
4 13-5⁄8 346 7-7⁄8 200 2 52 1-1⁄4 32 4-1⁄8 105 3-5/8 92 10-1⁄2 267 5⁄8 16 6-1⁄16 154 7⁄16 11
5 14-5⁄8 372 8-3⁄8 213 2-3⁄16 56 1-1⁄4 32 4-7⁄8 124 3-5⁄8 92 10-1⁄2 267 3⁄4 19 7-1⁄8 181 1⁄2 13
6 15-5⁄8 397 8-7⁄8 226 2-3⁄16 56 1-1⁄4 32 6-1⁄8 156 3-5⁄8 92 10-1⁄2 267 3⁄4 19 8-3⁄16 208 1⁄2 13
8 18-7⁄8 479 10-1⁄4 260 2-3⁄8 60 1-3⁄4 45 8 202 5 125 14 356 7⁄8 22 10-1⁄4 260 5⁄8 16
10 21-1⁄4 540 11-1⁄2 292 2-5⁄8 66 1-3⁄4 45 9-7⁄8 251 5 125 14 356 1-1⁄8 29 12-5⁄8 320 13⁄16 21
12 24-5⁄8 626 13-1⁄4 337 3 76 1-3⁄4 45 11-7⁄8 301 6 150 14 356 1-1⁄4 32 14-3⁄4 375 - -
14 26-3⁄4 679 14-1⁄2 368 3 76 1-3⁄4 45 13-1⁄8 333 6 150 - - 1-1⁄4 32 15-15⁄16 405 - -
16 30 762 15-3⁄4 400 3-3⁄8 87 2 50 15-3⁄8 391 6-7⁄8 175 - - 1-5⁄16 33 18-1⁄2 470 - -
18 31-1⁄2 800 16-5⁄8 422 4-1⁄8 105 2 50 17-3⁄8 442 6-7⁄8 175 - - 1-1⁄2 38 20-11⁄16 525 - -
20 35-5⁄16 897 18-7⁄8 480 5-1⁄8 130 2-1⁄8 53 19-3⁄8 493 8-1⁄4 210 - - 1-5⁄8 41 22-1⁄4 565 - -
24 42-7⁄8 1088 22-1⁄8 562 6 152 2-1⁄4 58 23-3⁄8 594 8-1⁄4 210 - - 2 50 27-5⁄16 693 - -

Dimensions for Model 87 Butterfly Valves by Mueller Dimensions for Model 87 Butterfly Valves by Mueller

Size Top Plate Tapped Lug Data Key Way Weight (lbs.)†
N O Bolt Circle No. Bolt
Q
in. mm in. mm in. mm Holes P in. mm 88 87
2" 2 50 1⁄4 7 4 3 ⁄4 121 4 5⁄8"-11UNC x 1-5⁄8" - - 8 6
2-1⁄2" 2 50 1⁄4 7 5-1⁄2 140 4 5⁄8"-11UNC x 1-3⁄4 - - 10 7
3" 2 50 1/4 7 6 150 4 5⁄8"-11UNC x 1-3⁄4" - - 10 7
4" 2-3/4 70 3⁄8 10 7-1⁄2 191 8 5⁄8"-11UNC x 2" - - 17 12
5" 2-3⁄4 70 3⁄8 10 8-1⁄2 216 8 3 ⁄4"-10UNC x 2-3⁄16" - - 25 16
6" 2-3⁄4 70 3⁄8 10 9-1⁄2 241 8 3⁄4"-10UNC x 2-3⁄16 - - 27 20
8" 4 102 1⁄2 13 11-3⁄4 298 8 3⁄4"-10UNC x 2-3⁄8" - - 40 29
10" 4 102 1⁄2 13 14-1⁄4 362 12 7⁄8"-9UNC x 2-5⁄8" - - 63 48
12" 5 125 1⁄2 13 17 432 12 7⁄8"-9UNC x 3 1⁄4 x 1-1⁄4 6 x 32 107 78
14" 5 125 1⁄2 13 18-3⁄4 476 12 1"-8UNC x 3" 1⁄4 x 1-1⁄4 6 x 32 156 99
16" 5-1⁄2 140 11⁄16 18 21-1/4 540 16 1"-8UNC x 3-3⁄8" 5⁄16 x 1-13/16 8 x 46 203 140
18" 5-1⁄2 140 11⁄16 18 22-3⁄4 578 16 1-1⁄8"-7UNC x 4-1⁄8" 3⁄8 x 19/16 10 x 40 269 188
20" 6-1⁄2 165 7⁄8 22 25 635 20 1-1⁄8"-7UNC x 5-1⁄8" 3 ⁄8 x 19 ⁄16 10 x 40 392 248
24" 6-1⁄2 165 7⁄8 22 29-1⁄2 750 20 1-1⁄4"-7UNC x 6" 1⁄2 x 2-3⁄8 13 x 60 593 450

†Weights are for valves with ductile iron or aluminum bronze discs. 2" – 12" have levers; 14" – 24" have bare shafts.
Refer to Watts F-CDBF for gear operator weights.

Seating Torque
Buna-n, EPDM (in./lbs.)
Size Normal Conditions
(Wet/Dry)
2" 134/214
2-1⁄2" 190/289
3" 250/387
4" 390/644
5" 600/959
6" 907/1,542
8" 1,697/2,919
10" 2,500/4,857
12" 3,300/7,071
14" 3,500/7,305
16" 5,500/10,027
18" 8,200/13,437
20" 10,000/17,925
24" 18,680/28,020
Cv Rating
(Full open)
Size Cv Rating
2" 135
2-1⁄2" 220
3" 302
4" 600
5" 1,022
6" 1,579
8" 3,136
10" 5,340
12" 8,250
14" 11,917
16" 16,388
18" 21,705
20" 27,908
24" 43,116
Valve Size Gear Dimensions: STD. Weatherproof W/ Handwheel
A B C D E F # Turns
Open-Close
Unit Weight (lbs.)
Depth Width CL to HW HW Dia. Height CL to MT Pad
2", 21 ⁄2", 3" 5.0 4.2 6.5 6.0 2.7 1.5 7.0 10.0
4" 5.0 4.2 6.5 6.0 2.7 1.5 7.0 10.0
5", 6" 5.0 4.2 6.5 6.0 2.7 1.5 7.0 10.0
8" 7.0 6.2 9.5 12.0 3.0 1.8 7.5 27.5
10" 7.0 6.2 9.5 12.0 3.0 1.8 7.5 27.5
12", 14" 7.8 6.4 9.5 12.0 3.0 2.0 12.5 33.0
16" 11.5 9.6 15.0 16.0 4.2 2.5 20.0 70.5
18" 11.5 9.6 15.0 16.0 4.2 2.5 20.0 70.5
20" 11.5 9.6 15.0 16.0 4.2 2.5 20.0 70.5
24" 12.6 9.1 15.0 24.0 4.5 2.0 20.0 80.0

Dimensions for Model 87 Butterfly Valves by Mueller Steam Dimensions for Model 87 Butterfly Valves by Mueller Steam