77A STAINLESS STEEL COUPLING

الوصف

The Model *7A is mainly designed for high pressure grooved piping systems, such as high salinity wastewater treatment systems, RO seawater desalination systems, landfill leachate treatment systems, and cut grooved piping systems with rated working pressure of ***0 psi (**0 bar). It is supplied in strong and anti-corrosive alloy materials of **4, **6, **6L, Duplex CD3MN (***5), Super Duplex CE8MN, CE3MN (***7). Its **6 bolts and nuts have excellent anti-corrosion performance and longer service life.







Sizes-Inches & Rated working pressure

3/4″to 8″(DN*0 to DN**0) ***0psi(**5bar)

*0″to *2″(DN**0 to DN**0）***0psi(*3bar)

Cut groove only





MODEL *7A MATERIAL SPECIFICATIONS

Housings:

Super duplex ***7(CE3MN)to ASTM A**0 Grade5A

â–¡ CE8MN to ASTM A**0 Grade 2A

â–¡ Duplex ***5(CD3MN)to ASTM A**0 Grade4A

â–¡ Austenic **4 SMO(CK3MCuN) to A**3

â–¡ Austenic **4L(CN2MCuN) to A**1

â–¡ Type **6 to ASTM A**1 CF8M

â–¡ Type **6L to ASTM A**1 CF3M



Rubber Gaskets:

The gasket seals is C-shaped, made of standard gasket EPDM(ethylene propylene diene monomer) for cold water,hot water, dilute acid, oil-free air and multiple chemical product (**0~**0℃). It is not suitable for medium like petroleum





Bolts:

â–¡ Type **4 stainless steel track bolts to ASTM F**3



â–¡ Type **6 stainless steel track bolts to ASTM A**3





Nuts:

â–¡ Type **4 stainless steel nuts to ASTM F**4

â–¡ Type **6 stainless steel nuts to ASTM A**4

â–¡ Silicone bronze heavy duty nuts to ASTM B*8 C****0 for option