Corken 521 - Page 17

Material Specifications
Operating Specifications
Flange Options
Part Model Standard Material
Case, head, flange, rotor,
seat adapter plate
All Ductile iron ASTM A536, Class 30
Cam, sideplate, bearing cap All Gray iron ASTM A48, Class 30
Welding flange All Steel
Seal seat All Silicon carbide
Seal metal parts All Steel
Shaft 521, 1021 “Stressproof” steel
Vanes All Plastic
Relief valve spring 521, 1021 Steel, cadmium plated
Relief valve 521, 1021 Steel
Bearing All Cylinder roller
O-rings All
Buna-N (standard), PTFE (optional), Viton
®1
(optional),
Neoprene
®1
(optional)
Retainer rings All Steel
1
Registered trademark of the DuPont company.
Appendix B—Specifications for Models 521, 1021, and F1021
Model 521 1021 F1021
RPM range 420–950 420–950 420–950
Temperature range -25°F (-32°C) to 225°F (107°C)
Maximum working
pressure psig (bar g)
350 (24.1) 350 (24.1) 350 (24.1)
Maximum differential
pressure psid (bar d)
125 (8.6) 125 (8.6) 125 (8.6)
Maximum driver size
hp (kW)
10 (7.5) 20 (15) 20 (15)
Flow range gpm 30–85 65–195 65–195
Model Standard No Cost Option Extra Cost Option
521
Inlet 2-1/2" NPT 2" NPT 2", 2-1/2" weld flange
Outlet 2" NPT 1-1/2", 1-1/1" NPT 1-1/2", 2", 2-1/2" weld flange
1021
Inlet 3" NPT 4" NPT 3", 4" weld flange
Outlet 3" NPT 4" NPT 3", 4" weld flange
F1021
Inlet 3" 300# ANSI — —
Outlet 2-1/2" 300# ANSI — —
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