Coupling (DN20.DN25.DN40)
The stainless steel high pressure coupling is designed for high pressure applications, such as RO and desalination systems. The 77A series is available with strong and anti-corrosive alloys of CF8 (ss304), CF8M (316), CF3M (316L), Duplex CD3MN (2205), super duplex CE8MN, CE3MN (2507). The 77C features 304 / 316 botls and silicone bronze heavy nuts to prevent galling during repetitive use.
Sizes - inches / DN & Operation pressure rating
3/4" to 8" (DN20 to DN200) 1500 psi (105 bar)
10" to 12" (DN250 to DN300) 1200 psi (83 bar) (cut groove only)
Material specification:
Super duplex 2507 (CE3MN) to ASTM A890 Grade 5A
-CE8MN TO ASTM A 890 GRADE 2A
-Duplex 2205 (CD3MN) to ASTM A 890 Grade 4A
-Austenic 254SMO (CK3MCuN) TO A743
-Austenic 904L (CN2MCuN) TO A351
-316 to ASTM A743 CF8M
-316L to ASTM A743 CF3M
Rubber gaskets:
The gasket seal is C-shaped, made of EPDM for cold water, hot water, acid, oil-free air and multiple chemical solution (-50C to 150C).
Bolts: Type SS304 or 316 stainless steel track bolts ASTM A193- B8M
Nuts: Type SS304 or 316 stainless steel nuts ASTM A-193 B-8M
Optional silicone bronze heavy duty nuts to ASTM B98 C65 100.
Model | Material options | Seal | Size | Pressure
rating | Work
Temperature |
| Inch | DN |
| 75L | CF8: ss304
CF8M: 316
CF3M: 316L
Duplex CD3MN: 2205
Super Duplex CED8MN,
CE3MN: 2507 | EPDM | 3/4"-8" | DN20-DN300 | 300psi | -50~150 ºC |
| 76M | 600psi |
| 77H | 1200psi |
| 77AH | 1200psi |
| 77AH-E | 10"-12" | DN250-DN300 | 1500psi |
Shanghai Hello Pure Water Technology Co., Ltd is established in 2010. We are a professional manufacturer and exporter that is concerned with the design, development and production of water treatment system and components. We are located in Shanghai, China, with convenient transportation access. All of our products comply with international quality standards and are greatly appreciated in a variety of different markets throughout the world.
The Range of our products include residential, commercial and industrial water treatment system and components
Our well-equipped facilities and excellent quality control throughout all stages of production enables us to guarantee total customer satisfaction. As a result of our high quality products and outstanding customer service, we have gained a global sales network reaching the Whole Asia, Middle East, Europe, America and South of America.
If you are interested in any of our products or would like to discuss a custom order, please feel free to contact us. We are looking forward to forming successful business relationships with new clients around the world in the near future.
Our company promises: Reasonable prices, short production time and satisfactory after-sales service, Mutual development, mutual benefits
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