709 ULTRAHIGH PRESSURE
DUCTILE IRON COUPLING
The Model 709 is designed for connection of grooved ultrahigh pressure pipe systems.
Sizes-Inches& Rated working pressure：
3/4″ to 6″(DN20 to DN150) 2000psi(137.8bar)
8″ to 12″ (DN200 to DN300) 1000psi(68.9bar)
Cut groove only
MODEL 709 MATERIAL SPECIFICATIONS
Housings:
Ductile Iron to ASTM A536
Surface Finish:
(Antirust paint red or blue)
□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, rare acid, oil-free air and multiple chemical roduct (-50~150℃).It is not suitable
for the medium like petroleum.
Bolts & Nuts:
Round-head, elliptoid-neck, carriage bolts, type carbon iron covered with zinc or dacromet.
