Coupling for Industrial RO Water Treatment Purification

• Customization: Available
• Connection: Welding
• Structure: Metal Bellows
• Model NO.: DN 20. DN25, DN40
• Flexible or Rigid: Rigid
• Material: Stainless Steel
• Standard: Standard
• Brand: Hellopure
• Materials: S.S.304/316
• Transport Package: Cartons
• Specification: CE
• Trademark: Hellopure
• Origin: Shanghai, China
• HS Code: 842199
• Production Capacity: 10000PCS

Product Description

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