75L STAINLESS STEEL COUPLING
The 75L Stainless Steel Coupling is a high-quality grooved pipe coupling designed for low-pressure piping systems such as microfiltration, ultrafiltration, reverse osmosis, and municipal water applications. Engineered for reliable performance, it supports a rated working pressure of up to 350 psi (25 bar) and is suitable for pipe sizes ranging from 3/4″ to 12″ (DN20–DN300). The coupling is manufactured using premium stainless steel materials including options like 304 (CF8), 316 (CF8M), and other advanced grades, ensuring excellent corrosion resistance and durability even in demanding environments. It features EPDM C-shaped rubber gaskets that provide effective sealing for water, air, and mild chemical applications within a temperature range of -30°C to 110°C. High-strength stainless steel bolts and nuts (304 or 316) further enhance its anti-corrosion properties and long service life. Designed for easy installation and secure connection, the Model 75L coupling is an efficient and reliable solution for maintaining leak-proof and stable pipeline systems, supported by strict quality control, advanced testing, timely delivery, and professional after-sales service.
MODEL 75L Material Specifications
Housings:
- Type 304 stainless steel → ASTM A351 CF8 or A743 Gr. CF8
- Type 316 → ASTM A351 CF8M
- Type 316L → ASTM A351 CF3M
- CE8MN → ASTM A890 Grade 2A
- Austenitic 904L (CN2MCuN) → A351
- Duplex 2205 (CD3MN) → ASTM A890 Grade 4A
- Super duplex 2507 (CE3MN) → ASTM A890 Grade 5A
- Austenitic 254SMO (CK3MCuN) → A743
| Nominal | Pipe | Rated Working | Pipe End | Total Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
In |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 20
0.75 |
26.90
1.059 |
350
24.13 |
0-1.6
0-0.06 |
47
1.850 |
83
3.268 |
42
1.654 |
0.27
0.59 |
| 25
|
32.00
1.260 |
350
24.13 |
0-1.6
0-0.06 |
54
2.126 |
89
3.504 |
42
1.654 |
0.31
0.37 |
| 25
1 |
33.70
1.327 |
350
24.13 |
0-1.6
0-0.06 |
54
2.126 |
89
3.504 |
42
1.654 |
0.31
0.67 |
| 32 | 38.00
1.496 |
350
24.13 |
0-1.6
0-0.06 |
58
2.283 |
85
3.740 |
42
1.654 |
0.35
0.77 |
| 32
1.25 |
42.40
1.669 |
350
24.13 |
0-1.6
0-0.06 |
63
2.48 |
100
3.937 |
43
1.693 |
0.37
0.80 |
| 40
1.5 |
48.30
1.900 |
350
24.13 |
0-1.6
0-0.06 |
69
2.717 |
105
4.134 |
44
1.732 |
0.42
0.93 |
| 50 | 57.00
2.244 |
350
24.13 |
0-1.6
0-0.06 |
76
2.992 |
116
4.567 |
44
1.732 |
0.46
1.02 |
| 50
2 |
60.30
2.375 |
350
24.13 |
0-1.6
0-0.06 |
79
3.11 |
117
4.606 |
44
1.732 |
0.47
1.03 |
| 65
2.5 |
73.00
2.875 |
350
24.13 |
0-1.6
0-0.06 |
94
3.701 |
133
5.236 |
44
1.732 |
0.55
1.21 |
| 65 | 76.10
3.000 |
350
24.13 |
0-1.6
0-0.06 |
99
3.898 |
137
5.394 |
44
1.732 |
0.59
1.29 |
| 80
3 |
88.90
3.500 |
350
24.13 |
0-1.6
0-0.06 |
111
4.37 |
151
5.945 |
44
1.732 |
0.73
1.61 |
| 100 | 108.00
4.250 |
350
24.13 |
0-3.2
0-0.13 |
131
5.157 |
180
7.087 |
48
1.89 |
1.14
2.50 |
| 100
4 |
114.30
4.500 |
350
24.13 |
0-3.2
0-0.13 |
141
5.551 |
189
7.441 |
48
1.89 |
1.20
2.63 |
| 125 | 133.00
5.250 |
350
24.13 |
0-3.2
0-0.13 |
158
6.22 |
206
8.110 |
49
1.929 |
1.33
2.94 |
| 125
5 |
139.70
5.500 |
350
24.13 |
0-3.2
0-0.13 |
166
6.535 |
215
8.465 |
49
1.929 |
1.52
3.34 |
| 125
5 |
141.30
5.563 |
350
24.13 |
0-3.2
0-0.13 |
166
6.535 |
215
8.465 |
49
1.929 |
2.90
6.38 |
| 150 | 159.00
6.259 |
350
24.13 |
0-3.2
0-0.13 |
189
7.441 |
239
9.409 |
50
1.969 |
1.83
4.02 |
| 150
6 |
168.30
6.625 |
350
24.13 |
0-3.2
0-0.13 |
197
7.756 |
246
9.685 |
50
1.969 |
1.88
4.14 |
| 200
8 |
219.10
8.625 |
350
24.13 |
0-3.2
0-0.13 |
255
10.305 |
315
0.381 |
60
2.078 |
3.58
7.87 |
| 250
10 |
273.00
10.748 |
350
24.13 |
0-3.2
0-0.13 |
317
12.48 |
380
15.197 |
60
2.362 |
4.80
10.57 |
| 300
12 |
323.90
12.752 |
350
24.13 |
0-3.2
0-0.13 |
408
16.063 |
441
17.362 |
65
2.559 |
6.68
14.73 |
76M STAINLESS STEEL COUPLING
The 76M Stainless Steel Coupling is a robust grooved coupling designed for medium-pressure piping systems, including reverse osmosis and cut-grooved pipelines, with a rated working pressure of up to 600 psi (42 bar). Suitable for sizes ranging from 3/4″ to 8″ (DN20–DN200), it is manufactured using high-grade stainless steel materials such as 304 (CF8) and 316 (CF8M), along with advanced alloy options for enhanced strength and corrosion resistance. The coupling features a C-shaped EPDM rubber gasket that ensures reliable sealing for water, air, and mild chemical applications within a temperature range of -30°C to 110°C, while stainless steel bolts and nuts (304/316) provide excellent durability and long service life. Designed for secure, leak-proof connections and easy installation, the Model 76M coupling delivers efficient and dependable performance, supported by strict quality control, advanced testing, timely delivery, and professional after-sales service.
Material Grade Equivalents:
- Type 304 stainless steel → ASTM A351 CF8 or A743 Gr. CF8
- Type 316 → ASTM A351 CF8M
- Type 316L → ASTM A351 CF3M
- CE8MN → ASTM A890 Grade 2A
- Austenitic 904L (CN2MCuN) → ASTM A351
- Duplex 2205 (CD3MN) → ASTM A890 Grade 4A
- Super duplex 2507 (CE3MN) → ASTM A890 Grade 5A
- Austenitic 254SMO (CK3MCuN) → ASTM A743
| Nominal | Pipe | Rated Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 20
0.75 |
26.90 1.059 | 600
41.34 |
0–1.6 0–0.06 | 48
1.890 |
81 3.189 | 42 1.654 | 0.30
0.65 |
| 25
— |
32.00 1.260 | 600
41.34 |
0–1.6 0–0.06 | 55 2.165 | 89 3.504 | 42 1.654 | 0.31 0.68 |
| 25
1 |
33.70 1.327 | 600
41.34 |
0–1.6 0–0.06 | 55 2.165 | 89 3.504 | 42 1.654 | 0.34 0.75 |
| 32
— |
38.00 1.496 | 600
41.34 |
0–1.6 0–0.06 | 59 2.323 | 97 3.819 | 43 1.693 | 0.32
0.70 |
| 32
1.25 |
42.40 1.669 | 600
41.34 |
0–1.6 0–0.06 | 64 2.520 | 99 3.898 | 43 1.693 | 0.44
0.97 |
| 40
1.5 |
48.30 1.900 | 600
41.34 |
0–1.6 0–0.06 | 71
2.795 |
109 4.291 | 44
1.732 |
0.57
1.26 |
| 50
— |
57.00 2.244 | 600
41.34 |
0–1.6 0–0.06 | 80
3.150 |
121
4.764 |
44
1.732 |
0.62
1.36 |
| 50
2 |
60.30 2.375 | 600
41.34 |
0–1.6 0–0.06 | 83
3.268 |
12
4.764 |
44
1.732 |
0.65
1.42 |
| 65
2.5 |
73.00 2.875 | 600
41.34 |
0–1.6 0–0.06 | 95 3.740 | 130 5.118 | 45
1.772 |
0.80
1.76 |
| 65
— |
76.10 3.000 | 600
41.34 |
0–1.6 0–0.06 | 100
3.937 |
135 5.315 | 45 1.772 | 0.84
1.84 |
| 80
3 |
88.90 3.500 | 600
41.34 |
0–1.6 0–0.06 | 112
4.409 |
155 6.102 | 45 1.772 | 1.05
2.30 |
| 100
— |
108.00 4.250 | 600
41.34 |
0–3.2 0–0.13 | 135 5.315 | 186 7.323 | 48
1.890 |
1.46
3.20 |
| 100
4 |
114.30 4.500 | 600
41.34 |
0–3.2 0–0.13 | 145 5.709 | 185 7.283 | 48
1.890 |
1.56
3.43 |
| 125
— |
133.00 5.250 | 600
41.34 |
0–3.2 0–0.13 | 161 6.339 | 201 7.913 | 52 2.047 | 1.67
3.66 |
| 125
5 |
139.70 5.500 | 600
41.34 |
0–3.2 0–0.13 | 170
6.693 |
217 8.543 | 52
2.047 |
1.52
3.34 |
| 125
5 |
141.30 5.563 | 600
41.34 |
0–3.2 0–0.13 | 170 6.693 | 220 8.661 | 52 2.047 | 1.83
4.03 |
| 150
— |
159.00 6.250 | 600
41.34 |
0–3.2 0–0.13 | 193
7.598 |
244 9.606 | 52
2.047 |
2.16
4.75 |
| 150
6 |
168.30 6.625 | 600
41.34 |
0–3.2 0–0.13 | 202 7.953 | 267
10.512 |
52 2.047 | 2.53
5.57 |
| 200
8 |
219.10 8.625 | 450
31.01 |
0–3.2 0–0.13 | 264
10.394 |
319
12.559 |
60 2.362 | 4.59 10.09 |
77C STAINLESS STEEL COUPLING
The 77C Stainless Steel Coupling is a heavy-duty grooved coupling engineered for high-pressure piping systems, including RO seawater desalination and other demanding industrial applications, with a rated working pressure of up to 1200 psi (83 bar). Suitable for sizes from 3/4″ to 12″ (DN20–DN300), it is manufactured using strong and corrosion-resistant materials such as 304, 316, 316L, Duplex 2205, Super Duplex 2507, and other advanced alloys, ensuring exceptional durability in harsh environments. The coupling features a C-shaped EPDM rubber gasket that provides reliable sealing for water, air, and mild chemical applications within a temperature range of -30°C to 110°C, while stainless steel bolts and nuts (304/316) offer excellent anti-corrosion performance and extended service life. Designed for secure, leak-proof connections and easy installation, the Model 77C coupling delivers high efficiency, strength, and reliability, supported by strict quality control, advanced testing, timely delivery, and professional after-sales service.
Sizes: 3/4″ to 12″ (DN20 to DN300)
Rated Working Pressure: 1200 psi (83 bar) – cut groove only
Housings:
- Super duplex 2507 (CE3MN) → ASTM A890 Grade 5A
- CE8MN → ASTM A890 Grade 2A
- Duplex 2205 (CD3MN) → ASTM A890 Grade 4A
- Austenitic 254SMO (CK3MCuN) → A743
- Austenitic 904L (CN2MCuN) → A351
- Type 316 → ASTM A351 CF8M
- Type 316L → ASTM A351 CF3M
| Nominal | Pipe | Rated Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 20
0.75 |
26.90 1.059 | 1200
83 |
0–1.6 0–0.06 | 48
1.890 |
78 3.071 | 44 1.732 | 0.58
0.28 |
| 25
– |
32.00
1.260 |
1200
83 |
0-1.6
0-0.06 |
55
2.165 |
87
3.425 |
44
1.732 |
0.60
1.32 |
| 25
1 |
33.70
1.327 |
1200
83 |
0-1.6
0-0.06 |
55
2.165 |
87
3.425 |
44
1.732 |
0.66
1.45 |
| 32
– |
38.00
1.496 |
1200
83 |
0-1.6
0-0.06 |
63
2.480 |
98
3.858 |
44
1.732 |
0.62
1.36 |
| 32
1.25 |
42.40
1.669 |
1200
83 |
0-1.6
0-0.06 |
63
2.835 |
98
4.016 |
44
1.732 |
0.78
1.87 |
| 40
1.5 |
48.30
1.900 |
1200
83 |
0-1.6
0-0.06 |
72 2.835 |
102
4.016 |
44
1.732 |
1.16
2.55 |
| 50 | 57.00
2.244 |
600
41.34 |
0-1.6
0-0.06 |
85
3.366 |
121
4.764 |
44
1.732 |
0.81
1.78 |
| 50
2 |
60.30
2.375 |
1200
83 |
0-1.6
0-0.06 |
85
3.446 |
121
4.764 |
44
1.732 |
1.33
2.93 |
| 65
2.5 |
73.00
2.875 |
1200
83 |
0-1.6
0-0.06 |
98
3.858 |
136
5.354 |
45
1.772 |
1.53
3.37 |
| 65
— |
76.10
3.000 |
1200
83 |
0-1.6
0-0.06 |
102
4.016 |
140
5.512 |
45
1.772 |
1.62
3.56 |
| 80
3 |
88.90
3.500 |
1200
83 |
0-1.6
0-0.06 |
115
4.528 |
164
6.457 |
45
1.772 |
2.00
4.40 |
| 100
— |
108.00
4.250 |
1200
83 |
0-3.2
0-0.13 |
138
5.433 |
190
7.480 |
52
2.047 |
3.33
7.33 |
| 100
4 |
114.30
4.500 |
1200
83 |
0-3.2
0-0.13 |
150
5.906 |
206
8.110 |
52
2.047 |
3.35
7.37 |
| 125
— |
133.00
5.250 |
1200
83 |
0-3.2
0-0.13 |
165
6.496 |
220
8.661 |
52
2.047 |
4.19
9.22 |
| 125 | 139.70
5.500 |
1200
83 |
0-3.2
0-0.13 |
176
6.921 |
228
8.976 |
52
2.047 |
5.00
11.00 |
| 125
5 |
141.30
5.563 |
1200
83 |
0-3.2
0-0.13 |
177
6.969 |
228
8.976 |
52
2.047 |
5.25
11.25 |
| 150
— |
159.00
6.259 |
1200
83 |
0-3.2
0-0.13 |
197
7.750 |
260
10.236 |
52
2.047 |
6.48
14.26 |
| 150
6 |
168.30
6.625 |
1200
83 |
0-3.2
0-0.13 |
205
8.071 |
273
10.748 |
52
2.047 |
7.50
16.50 |
| 200
8 |
219.10
8.625 |
1200
83 |
0-3.2
0-0.13 |
281
11.063 |
244
9.606 |
64
2.520 |
11.26
24.77 |
| 250
10 |
273.00
10.748 |
1200
83 |
0-3.2
0-0.13 |
342
13.465 |
400
15.748 |
65
2.559 |
16.20
35.64 |
| 300
12 |
323.90
12.752 |
1200
83 |
0-3.2
0-0.13 |
399
15.709 |
478
18.819 |
65
2.559 |
18.00
39.60 |
77A STAINLESS STEEL COUPLING
The 77A Stainless Steel Coupling is a high-performance grooved coupling specifically engineered for extreme high-pressure piping systems such as high salinity wastewater treatment, RO seawater desalination, and landfill leachate applications, offering a rated working pressure of up to 1500 psi (105 bar) for sizes 3/4″ to 8″ (DN20–DN200) and 1200 psi (83 bar) for 10″ to 12″ (DN250–DN300). Constructed from strong and corrosion-resistant materials including 304, 316, 316L, Duplex 2205, Super Duplex 2507, and other advanced alloys, it ensures exceptional durability and performance in highly aggressive environments. The coupling uses a C-shaped EPDM rubber gasket for reliable sealing of water, air, and mild chemical media within a temperature range of -30°C to 110°C, while stainless steel bolts and nuts (304/316) provide excellent anti-corrosion properties and extended service life. Designed for secure, leak-proof connections and easy installation in cut-grooved systems, the Model 77A coupling delivers superior strength, efficiency, and long-term reliability, backed by strict quality control, advanced testing, timely delivery, and professional after-sales support.
Housings:
- Super duplex 2507 (CE3MN) → ASTM A890 Grade 5A
- CE8MN → ASTM A890 Grade 2A
- Duplex 2205 (CD3MN) → ASTM A890 Grade 4A
- Austenitic 254 SMO (CK3MCuN) → A743
- Austenitic 904L (CN2MCuN) → A351
- Type 316 → ASTM A351 CF8M
- Type 316L → ASTM A351 CF3M
| Nominal | Pipe | Rated Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 20
0.75 |
26.90 1.059 | 1500
105 |
0–1.6 0–0.06 | 53
2.087 |
86
3.386 |
44 1.732 | 0.58
1.28 |
| 25
— |
32.00
1.260 |
1500
105 |
0–1.6 0–0.06 | 60
2.362 |
93
3.661 |
44 1.732 | 0.67
1.47 |
| 25
1 |
33.70
1.327 |
1500
105 |
0–1.6 0–0.06 | 60
2.362 |
93
3.661 |
44 1.732 | 0.67
1.47 |
| 32
— |
38.00
1.496 |
1500
105 |
0–1.6 0–0.06 | 70
2.756 |
102
4.016 |
44 1.732 | 0.76
1.67 |
| 32
1.25 |
42.40
1.669 |
1500
105 |
0–1.6 0–0.06 | 72
2.835 |
102
4.016
|
44
1.732 |
0.76
1.67 |
| 40
1.5 |
48.30
1.900 |
1500
105 |
0–1.6 0–0.06 | 79
3.110 |
121
4.764 |
44
1.732 |
1.16
2.55 |
| 50
2 |
60.30
2.375 |
1500
105 |
0–1.6 0–0.06 | 91
3.583 |
135
5.315 |
45
1.772 |
1.33
2.93 |
| 65
2.5 |
73.00
2.875 |
1500
105 |
0–1.6 0–0.06 | 104
4.094 |
145
5.709 |
45
1.772 |
1.53
3.37 |
| 65
— |
76.10
3.000 |
1500
105 |
0–1.6 0–0.06 | 109
4.291 |
152
5.984 |
45
1.772 |
1.62
3.56 |
| 80
3 |
88.90
3.500 |
1500
105 |
0-1.6
0-0.06 |
125
4.921 |
166
6.535 |
45
1.772 |
2.00
4.40 |
| 100
— |
108.00
4.250 |
1500
105 |
0-3.2
0-0.13 |
154
6.063 |
197
7.756 |
52
2.047 |
3.33
7.33 |
| 100
4 |
114.30
4.500 |
1500
105 |
0-3.2
0-0.13 |
152
5.984 |
207
8.150 |
52
2.047 |
3.35
7.37 |
| 125
— |
133.00
5.250 |
1500
105 |
0-3.2
0-0.13 |
178
7.008 |
231
9.094 |
52
2.047 |
4.19
9.22 |
| 125
5 |
139.70
5.500 |
1500
105 |
0-3.2
0-0.13 |
192
7.559 |
248
9.764 |
52
2.047 |
5.25
11.55 |
| 125
5 |
141.30
5.563 |
1500
105 |
0-3.2
0-0.13 |
192
7.559 |
248
9.764 |
52
2.047 |
5.25
11.55 |
| 150
— |
159.00
6.259 |
1500
105 |
0-3.2
0-0.13 |
216
8.504 |
265
10.433 |
52
2.047 |
5.80
12.78 |
| 150
6 |
168.30
6.625 |
1500
105 |
0-3.2
0-0.13 |
227
8.937 |
282
11.102 |
52
2.047 |
6.80
14.99 |
| 200
8 |
219.10
8.625 |
1500
105 |
0-3.2
0-0.13 |
281
11.063 |
244
9.606 |
64
2.520 |
11.40
25.14 |
| 250
10 |
273.00
10.748 |
1200
83 |
0-3.2
0-0.13 |
342
13.465 |
400
15.748 |
65
2.559 |
16.00
35.20 |
| 300
12 |
323.90
12.752 |
1200
83 |
0-3.2
0-0.13 |
399
15.709 |
478
18.819 |
65
2.559 |
19.47
42.84 |
HUP STAINLESS STEEL HIGH PRESSURE FLEXIBLE COUPLING
The HUP Stainless Steel High Pressure Flexible Coupling is a premium-grade grooved coupling designed for extreme high-pressure applications such as supercritical extraction equipment, high salinity and chemical wastewater treatment, landfill leachate systems, and RO seawater desalination, with a rated working pressure of up to 2320 psi (160 bar) for sizes 1″ to 4″ (DN25–DN100). Built from highly durable and corrosion-resistant materials like Duplex 2205 and Super Duplex 2507 alloys, it ensures exceptional strength and reliability in harsh environments. The coupling features a C-shaped EPDM rubber gasket that provides effective sealing for water, air, and mild chemical media within a temperature range of -30°C to 110°C, while stainless steel bolts and nuts (304/316) enhance corrosion resistance and service life. Designed for flexibility, secure installation, and leak-proof performance in cut-grooved systems, the Model HUP coupling delivers superior efficiency and long-term durability, supported by strict quality control, advanced testing, timely delivery, and professional after-sales support.
MODEL HUP Material Specifications
Housings:
- Super duplex 2205 (CD3MN) → ASTM A890 Grade 4A
- CE8MN → ASTM A890 Grade 2A
- Duplex 2507 (CE3MN) → ASTM A890 Grade 5A
| Nominal | Pipe | Rated Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 25
1 |
33.7
1.327 |
2320
160 |
0–1.6 0–0.06 | 67
2.638 |
104
4.094 |
47
1.850 |
1.21
2.68 |
| 32
1.25 |
42.40
1.669 |
2320
160 |
0–1.6 0–0.06 | 78
3.071 |
124
4.882 |
47
1.850 |
1.48
3.26 |
| 40
1.5 |
48.30
1.900 |
2320
160 |
0–1.6 0–0.06 | 82
3.228 |
136
5.354 |
47
1.850 |
1.82
4.01 |
| 50
2 |
60.30
2.375 |
2320
160 |
0–1.6 0–0.06 | 96
3.780 |
150
5.906 |
47
1.850 |
2.14
4.72 |
| 65
2.5 |
73.000
2.875 |
2320
160 |
0–1.6 0–0.06 | 113
4.449 |
176
6.929 |
48
1.890 |
3.12
6.88 |
| 65
— |
76.100
3.000 |
2320
160 |
0–1.6 0–0.06 | 118
4.646 |
180
7.087 |
48
1.890 |
3.25
7.17 |
| 80
3 |
88.90
3.500 |
2320
160 |
0–1.6 0–0.06 | 130
5.118 |
190
7.480 |
48
1.890 |
3.36
7.01 |
| 100
4 |
114.30
4.500 |
2320
160 |
0–1.6 0–0.06 | 161
6.339 |
216
8.504 |
54
2.126 |
5.02
11.01 |
707 DUCTILE IRON COUPLING
The 707 Ductile Iron Coupling is a high-pressure grooved coupling designed for demanding applications such as fire protection and marine piping systems, offering a rated working pressure of up to 1200 psi (82 bar) for sizes 3/4″ to 6″ (DN20–DN150) and 1000 psi (68 bar) for 8″ to 12″ (DN200–DN300). Manufactured from strong ductile iron as per ASTM A536, it ensures durability and reliable performance under high-pressure conditions. The coupling supports multiple surface finishes including hot-dip galvanized, epoxy powder coating, Dacromet, PTFE (TRFLOW), and Rilsan PA11, providing enhanced corrosion resistance and customization options. It features a C-shaped EPDM rubber gasket for effective sealing of water, air, and mild chemical media within a temperature range of -30°C to 110°C, while coated carbon steel bolts and nuts ensure secure fastening and long service life. Designed for cut-grooved systems, the Model 707 coupling delivers strong, leak-proof connections with easy installation and dependable performance in critical environments.
Housings:
Ductile Iron to ASTM A536
Surface Finish:
- Hot dip zinc galvanized
- Epoxy powder
- Dacromet
- TRFLOW (PTFE)
- Rilsan PA11
| Nominal | Pipe | Rated Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 20
0.75 |
26.90
1.059 |
1200
82.68 |
0–1.6 0–0.06 | 54
2.126 |
102
4.016 |
44
1.732 |
0.50
1.10 |
| 25
1 |
33.70
1.315 |
1200
82.68 |
0–1.6 0–0.06 | 69
2.362 |
100
4.134 |
44
1.732 |
0.50
1.10 |
| 32
1.25 |
42.40
1.669 |
1200
82.68 |
0–1.6 0–0.06 | 69
2.717 |
112
4.409 |
48
1.890 |
0.90
1.98 |
| 40
1.5 |
48.30
1.902 |
1200
82.68 |
0–1.6 0–0.06 | 75
2.953 |
119
4.685 |
48
1.890 |
1.00
2.20 |
| 50
2 |
60.30
2.374 |
1200
82.68 |
0–1.6 0–0.06 | 86
3.386 |
132
5.197 |
48
1.890 |
1.20
2.64 |
| 65
2.5 |
73.00
2.874 |
1200
82.68 |
0–1.6 0–0.06 | 103
4.055 |
145
5.709 |
48
1.890 |
1.40
3.41 |
| 65
— |
76.10
2.996 |
1200
82.68 |
0–1.6 0–0.06 | 106
4.173 |
149
5.866 |
48
1.890 |
1.50
3.30 |
| 80
3 |
88.90
3.500 |
1000
68.9 |
0–1.6 0–0.06 | 118
4.646 |
162
6.378 |
48
1.890 |
1.70
3.74 |
| 100
— |
108.00
4.252 |
1000
68.9 |
0-3.2
0-0.13 |
144
5.669 |
202
7.953 |
54
2.126 |
5.00
11.00 |
| 100
4 |
114.30
4.500 |
1000
68.9 |
0-3.2
0-0.13 |
152
5.984 |
212
8.346 |
54
2.126 |
3.00
6.60 |
| 125
— |
133.00
5.236 |
1000
68.9 |
0-3.2
0-0.13 |
173
6.811 |
246
9.685 |
54
2.126 |
4.50
9.90 |
| 125 | 139.70
5.500 |
1000
68.9 |
0-3.2
0-0.13 |
178
7.008 |
252
9.921 |
54
2.126 |
9.90
9.90 |
| 125
5 |
141.30
5.563 |
1000
68.9 |
0-3.2
0-0.13 |
180
7.087 |
255
10.039 |
54
2.126 |
4.80
10.56 |
| 150
— |
159.00
6.260 |
1000
68.9 |
0-3.2
0-0.13 |
199
7.835 |
275
10.827 |
54
2.126 |
6.00
13.20 |
| 150
6 |
168.30
6.626 |
1000
68.9 |
0-3.2
0-0.13 |
211
8.307 |
290
11.417 |
54
1.126 |
5.40
11.88 |
| 200
8 |
219.10
8.626 |
800
55.12 |
0-3.2
0-0.13 |
263
10.354 |
346
13.622 |
64
2.520 |
9.40
20.68 |
| 250
10 |
273.00
10.745 |
800
55.12 |
0-3.2
0-0.13 |
327
12.874 |
422
16.614 |
67
2.638 |
14.10
31.02 |
| 300
12 |
323.90
12.752 |
800
55.12 |
0-3.2
0-0.13 |
380
14.961 |
474
18.661 |
67
2.638 |
17.60
38.72 |
705 DUCTILE IRON COUPLING
The 705 Ductile Iron Coupling is a reliable grooved coupling designed for low-pressure piping systems, commonly used in fire fighting, marine applications, and filtration systems such as microfiltration, ultrafiltration, and reverse osmosis. It supports a rated working pressure of up to 600 psi (42 bar) for sizes 3/4″ to 4″ (DN20–DN100) and 300 psi (21 bar) for 5″ to 12″ (DN125–DN300), making it suitable for a wide range of pipeline requirements. Manufactured from durable ductile iron as per ASTM A536, the coupling ensures strength and long service life, while optional surface finishes such as hot-dip galvanizing, epoxy coating, Dacromet, PTFE (TRFLOW), and Rilsan PA11 provide enhanced corrosion resistance. It features a C-shaped EPDM rubber gasket for effective sealing of water, air, and mild chemical media within a temperature range of -30°C to 110°C, along with coated carbon steel bolts and nuts for secure fastening. Designed for cut-grooved systems, the Model 705 coupling offers easy installation, leak-proof performance, and dependable operation in low-pressure environments.
Surface Finish:
- Hot dip zinc galvanized
- Epoxy powder
- Dacromet
- TRFLOW (PTFE)
- Rilsan PA11
| Nominal | Pipe | Rated Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 20
0.75 |
26.90
1.059 |
600
41.34 |
0–1.6 0–0.06 | 53
2.087 |
99
3.898 |
43
1.693 |
0.52
1.14 |
| 25 | 32.00
1.260 |
600
41.34 |
0–1.6 0–0.06 | 59
2.323 |
105
4.134 |
45
1.772 |
0.58
1.28 |
| 25
1 |
33.70
1.327 |
600
41.34 |
0–1.6 0–0.06 | 55
2.165 |
92
3.622 |
42
1.654 |
0.60
1.32 |
| 32 | 38.00
1.496 |
600
41.34 |
0–1.6 0–0.06 | 65
2.559 |
114
4.488 |
44
1.732 |
0.60
1.32 |
| 32
1.25 |
42.40
1.669 |
600
41.34 |
0–1.6 0–0.06 | 65
2.559 |
104
4.094 |
44
1.732 |
0.60
1.32 |
| 40
1.5 |
48.30
1.900 |
600
41.34 |
0–1.6 0–0.06 | 70
2.758 |
110
4.331 |
44
1.732 |
0.60
1.32 |
| 50 | 57.00
2.244 |
600
41.34 |
0–1.6 0–0.06 | 85
3.346 |
130
5.118 |
44
1.732 |
0.78
1.72 |
| 50
2 |
60.30
2.375 |
600
41.34 |
0–1.6 0–0.06 | 83
3.268 |
124
4.882 |
44
1.732 |
0.80
1.76 |
| 65
2.5 |
73.00
2.875 |
600
41.34 |
0–1.6 0–0.06 | 88
3.780 |
143
5.630 |
45
1.772 |
0.90
3.41 |
| 65 | 78.10
3.000 |
600
41.34 |
0–1.6 0–0.06 | 100
3.937 |
145
5.709 |
45
1.772 |
0.90
1.98 |
| 80
3 |
88.90
3.500 |
600
41.34 |
0–1.6 0–0.06 | 115
4.528 |
160
6.299 |
45
1.772 |
1.30
2.86 |
| 100 | 108.00
4.250 |
600
41.34 |
0–1.6 0–0.06 | 138
5.433 |
190
7.480 |
50
1.969 |
1.70
3.74 |
| 100
4 |
114.30
4.500 |
600
41.34 |
0-3.2
0-0.13 |
145
5.709 |
198
7.795 |
50
1.969 |
1.90
4.18 |
| 125 | 133.00
5.250 |
450
31.01 |
0-3.2
0-0.13 |
162
6.378 |
225
8.858 |
51
2.008 |
2.70
5.94 |
| 125
|
139.70
5.500 |
450
31.01 |
0-3.2
0-0.13 |
169
6.654 |
230
9.055 |
52
2.047 |
2.70
2.70 |
| 125
5 |
141.30
5.563 |
450
31.01 |
0-3.2
0-0.13 |
170
6.693 |
232
9.134 |
51
2.008 |
2.60
5.72 |
| 150 | 159.00
6.259 |
450
31.01 |
0-3.2
0-0.13 |
180
7.480 |
254
10.000 |
52
2.047 |
3.10
6.82 |
| 150
6 |
168.30
6.625 |
450
31.01 |
0-3.2
0-0.13 |
200
7.874 |
265
10.433 |
52
2.047 |
3.20
7.04 |
| 200
8 |
219.10
8.625 |
450
31.01 |
0-3.2
0-0.13 |
258
10.157 |
350
13.780 |
60
2.362 |
5.60
12.32 |
| 250
10 |
273.00
10.750 |
300
21 |
0-3.2
0-0.13 |
337
13.268 |
406
15.984 |
65
2.559 |
13.20
29.04 |
| 300
12 |
323.90
12.750 |
300
21 |
0-3.2
0-0.13 |
372
14.646 |
460
18.110 |
65
2.559 |
13.90
30.52 |
75N ANTI-CORROSION FLEXIBLE COUPLING
The 75N Anti-Corrosion Flexible Coupling is a specially engineered solution for low-pressure piping systems where corrosion resistance is critical, featuring a maximum working pressure of 300 psi (21 bar) and supporting sizes from 1″ to 8″ (DN25–DN200). Made from high-quality nylon alloy through high-temperature injection, it offers excellent strength, toughness, and superior resistance to corrosion, making it ideal for applications such as ultrafiltration (UF) systems, chemical wastewater treatment, and desalination processes. The coupling includes a C-shaped EPDM rubber gasket that ensures reliable sealing for water, air, and mild chemical media within a temperature range of -30°C to 110°C, while stainless steel bolts and nuts (304/316) enhance durability and longevity. Designed for flexibility, easy installation, and leak-proof performance, the Model 75N coupling provides an efficient and long-lasting solution for corrosion-prone pipeline environments.
| Nominal | Pipe | Max Working | Pipe End | Dimensions | |||
| Size | OD | Pressures | Separation | A | B | C | Weight |
| mm
in |
mm
in
|
psi
bar
|
mm
in |
mm
in |
mm
in |
mm
in |
kgs
lbs |
| 25
1 |
33.70
1.315 |
300
20.67 |
0-1.6
0-0.06 |
60
2.362 |
93
3.661 |
44
1.732 |
0.23
0.51 |
| 32
1.25 |
42.40
1.669 |
300
20.67 |
0-1.6
0-0.06 |
73
2.874 |
102
4.016 |
44
1.732 |
0.26
0.57 |
| 40
1.5 |
48.30
1.900 |
300
20.67 |
0-1.6
0-0.06 |
85
3.346 |
114
4.488 |
45
1.772 |
0.35
0.77 |
| 50
2 |
60.30
2.375 |
300
20.67 |
0-1.6
0-0.06 |
98
3.858 |
128
5.039 |
45
1.772 |
0.42
0.92 |
| 65
2.5 |
73.00
2.875 |
300
20.67 |
0-1.6
0-0.06 |
111
4.370 |
141
5.551 |
46
1.811 |
0.45
1.00 |
| 65
80 3 |
76.10
3.000 88.90 3.500 |
300
20.67 300 20.67 |
0-1.6
0-0.06 0-1.6 0-0.06 |
108
4.252 128 5.039 |
148
5.827 160 6.299 |
46
1.811 47 1.850 |
0.50
1.10 0.53 1.17 |
| 100
4 |
114.30
4.500 |
300
20.67 |
0-3.2
0-0.13 |
164
6.457 |
181
7.126 |
52
2.047 |
0.60
1.32 |
| 125
5 |
141.30
5.563 |
200
13.73 |
0-3.2
0-0.13 |
192
7.559 |
248
9.764 |
52
2.126 |
1.15
2.53 |
| 150
6 |
168.30
6.625 |
200
13.73 |
0-3.2
0-0.13 |
209
8.228 |
241
9.488 |
54
2.126 |
1.61
3.54 |
| 200
8 |
219.10
8.625 |
150
10.33 |
0-3.2
0-0.13 |
287
11.299 |
329
12.953 |
62
2.441 |
2.56
5.64 |