Corken D791 - Vertical Double-Acting Model Number Identification Code

BASE MODEL NUMBER D791 D891
Inlet 2" weld 2" weld
BASE
X
X
X
X
X
X
X
X
X
X
Outlet 2" weld 2" weld
Intercooler connection 2" weld NA
Approximate shipping weight (lbs.) 930 900
SPECIFICATION FIELDS
Packing arranged for padding of distance piece J
Packing arranged for venting of distance piece K
Atmospheric inlet or light vacuum service R
Pressure lubricated crankcase M
Std. crankcase with crankcase heater MH
Std. crankcase with cylinder lubricator Charge option Charge option L
Std. crankcase with cylinder lubricator and heater Charge option Charge option LH
Standard suction and discharge valves 4
Standard suction & discharge valves w/ light springs No charge option No charge option 4L
Loadless start through suction valve unloaders and
hydraulic unloader
Charge option Charge option 7(a)
Constant speed unloading through suction valve
unloaders and pilot valve
Charge option Charge option 8(b)
Combination control: loadless starting and constant
speed unloading
Charge option Charge option 78(a)(b)
Suction valve unloaders Charge option Charge option 9
Spec 4 valves w/MC1002 corrosion resistant coating NC NA 4C*
Spec 9 valves w/MC1002 corrosion resistant coating Charge option NA 9C*
PTFE piston ring and packing material Standard Standard F
Same as F with the addition of K-ring spacers Charge option Charge option FK
Alloy 50 piston rings and packing material Charge option Charge option G
Same as G with the addition of K-Ring spacers Charge option Charge option GK
PEEK piston ring and alloy 50 packing material Charge option Charge option H
Same as H with the addition of K-Ring spacers Charge option Charge option HK
Aluminum gasket material B
MODEL NUMBER
Piston Ring
and Packing
Material
Crankcase
Style
Charge option
Valves
Standard
Packing
Arrangement
Standard
No charge option
No charge option
Standard
Standard
Aluminum gasket material
B
Copper gasket material C
Iron-lead gasket material D
Buna-N A
Neoprene®
1
B
Viton®
1
D
PTFE and Kalrez®
1
E
Weld flanges only, no intercooler Standard NA F
Not applicable - single stage compressor, no
intercooler
NA Standard N
No flywheel supplied N
Standard flywheel S
Coated cylinder only C
No coating N
Coating on all necessary wetted parts W*
*Must select Protective Coating Option "W" when selecting valve option "4C", or "9C" for the D791
(a) 1 = up to 200 psi or 2 = above 200 psi (discharge pressure)
(b) 1 = 30 to 70 psi or 2 = 71 to 150 psi or 3 = 151 to 500 psi (discharge pressure)
NA = Not Available NC = No Charge Option
1
Registered trademarks of the DuPont company.
N
Charge option
O-ring Material
Standard
Charge option Charge option
Flywheel
No charge option
Standard
No charge option
Piston Rod
Coating
Protective
Coating
Standard
Charge option
Nitride Standard
Intercooler
Connections
No charge optionGasket Material
Standard
No charge option
Appendix A—Industrial Vertical Double Acting Model Number
Identification Code (D-Style)
Appendices
A. Vertical Double-Acting Model Number Identification Code
20