Model 77C

Stainless Steel High Pressure Flexible Coupling

The Model 77C is high pressure applications including reverse osmosis, desalination and 

other specialty systems. 

The Model 77C is available in strong and anti-corrosive alloys of Duplex CD3MN(2205), 

Super Duplex CE8MN, CE3MN(2507). 

The 77C features 316 bolts and silicone bronze heavy duty nuts to help prevent galling 

during repetitive use.

 

Sizes-inches/DN : 3/4 to 12inch(DN20 to DN300)

Rated working pressure : 1200psi(83bar) SCH40S cut groove only

Material Specifications                                                                                                       

Housings :

◆Super duplex 2507(CE3MN) to ASTM A890 Grade 5A

◆CE8MN to ASTM A890 Grade 2A

◆Duplex 2205(CD3MN) to ASTM A890 Grade 4A

◆Austenic 254SMO(CK3MCuN) to A743

◆Austenic 904L(CN2MCuN) to A351

◆Type 316 to ASTM A743 CF8M

◆Type 316L to ASTM A743 CF3M

 

Rubber Gaskets:

The gasket seals is C-shaped, made of standard gasket EPDM(ethylene propylene diene monomer) for cold water,hot water,rare acid,oil-free air and multiple chemical product(-50~150℃). It is not suitable for medium like petroleum.

 

Bolts 

◆Type 304 or 316 stainless steel track bolts ASTM A-193 B-8M

 

Nuts:

◆Type 304 or 316 stainless steel nuts ASTM A-193 B-8M Silicone bronze heavy duty nuts to ASTM B98 C65100 for option

Nominal

Size

mm

inch

20

0.75

25

 

25

1

32

 

32

1.25

40

1.5

50

 

50

2

65

2.5

65

 

80

3

100

 

100

4

125

 

125

5

150

 

150

6

200

8

Pipe O.D

A

mm

inch

26.70

1.050

32.00

1.260

33.40

1.315

38.00

1.496

42.20

1.660

48.30

1.900

57.00

2.244

60.30

2.375

73.00

2.875

76.10

3.000

88.90

3.500

108.00

4.250

114.30

4.500

133.00

5.250

141.30

5.563

159.00

6.259

168.30

6.625

219.10

8.625

Rate working

Pressure

Pipe End

separation

Dimensions

Weight

psi

bar

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

1200

82.68

mm

inch

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-1.6

0-0.06

0-3.2

0-0.13

0-3.2

0-0.13

0-3.2

0-0.13

0-3.2

0-0.13

0-3.2

0-0.13

0-3.2

0-0.13

0-3.2

0-0.13

mm

inch

53

2.087

59

2.323

60

2.362

70

2.756

72

2.835

79

3.11

89

3.504

91

3.583

104

4.094

108.5

4.272

125

4.921

154

6.063

157.4

6.197

178

7.008

192

7.559

216

8.504

227

8.937

281

11.063

B

mm

inch

86

3.386

91

3.583

93

3.661

100

3.937

102

4.016

121

4.764

133

5.236

135

5.315

145

5.709

152

5.984

166

6.535

197

7.756

207

8.15

231

9.094

248

9.764

256

10.433

282

11.102

244

9.606

C

mm

inch

44

1.732

44

1.732

44

1.732

44

1.732

44

1.732

44

1.732

45

1.772

45

1.772

45

1.772

45

1.772

45

1.772

52

2.047

52

2.047

52

2.047

52

2.047

52

2.047

52

2.047

64

2.52

kgs

lbs

0.580

1.276

0.600

1.320

0.660

1.452

0.620

1.364

0.760

1.672

0.661

1.455

0.810

1.782

0.842

1.853

0.989

2.176

1.600

3.520

1.360

2.992

3.350

7.370

2.700

5.940

4.200

9.240

5.300

11.66

6.800

14.96

7.500

16.50

11.40

25.08

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