707 DUCTILE IRON COUPLING

The Model 707 is specially designed for grooved high pressure piping systems,mainly used in fire piping system, marine piping system,etc.

Sizes-Inches& Rated working pressure：
3/4″ to 6″(DN20 to DN150)  1200psi(82bar)
8″ to 12″ (DN200 to DN300)  1000psi(68bar)

Cut groove only

MODEL 707 MATERIAL SPECIFICATIONS

Housings:
Ductile Iron to ASTM A536

Surface Finish:
Optional, can also be customized according to customers’ requirements.

□ Hot dip zinc galvanized
□ Epoxy power      
□ Dacromet
□ TRFLOW（PTFE）       
□ RilsanPA11

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 (-30~110℃).It is not suitable for medium like petroleum.

Bolts & Nuts:
Round-head, elliptoid-neck, carriage bolts, type carbon iron covered with zinc or dacromet.