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Select required orifice
diameter using the
graph below
Notes
This chart is calculated at 105
SUS and 120°F for ISO VG32
fluid (DTE-24), values will
change with viscosity changes.
Note
To calculate orifice diameter at
other flows and differential pressures
use the following formula:
D=0.203 x √(Q/(√?P)
Note
where D= orifice diameter in
inches; Q= flow in US gallons
per minute; ?P= differential
pressure across orifice in PSI.
Orifice Disc - Sizing Guide (inches)
J
 EATON Screw-In Cartridge Valves E-VLSC-MC001-E1

September 2013 J-55.A
Where measurements are critical request certified

drawings. We reserve the right to change specifications

without notice.
Nominal Single or With or Required
Cartridge Double Without Housing
Size Acting Stops A B C Bore
8 Single Without 15,1 (0.60) 34,1(1.34) 8,3 (0.33)

12,73 (0.500)
 Double Without 15,1 (0.60) 53,2 (2.10) 8,3 (0.33)

12,75 (0.502)
10 Single Without 19,1 (0.75) 41,3 (1.63) 13,5 (0.53)

15,88 (0.625)
 Double Without 19,1 (0.75) 57,2 (2.25) 10,3 (0.41)

15,88 (0.625)
 Single With 19,1 (0.75) 45,7 (1.80) 6,7 (0 26) 15,90

(0.626)
 Double With 19,1 (0.75) 54,8 (2.16) 6,7 (0 26) 15,90

(0.626)
12 Single Without 17,5 (0.69) 44,5 (1.75) 14,3 (0.56)

23,80 (0.937)
 Double Without 17,5 (0.69) 71,4 (2.81) 14,3 (0.56)

23,85 (0.939)
16 Single Without 31,8 (1.25) 63,5 (2.50) 12,7 (0.50)

28,58 (1.125)
 Double Without 31,8 (1.25) 95.3 (3.75) 12,7 (0.50)

28,60 (1.126)
20 Single Without 38,1 (1.50) 77,8 (3.06) 19,0 (0.75)

36,50 (1.437)
 Double Without 38,1 (1.50) 117,5 (4.63) 19,0 (0.75)

36,53 (1.438)
Pilot Piston Assemblies
Dimensions
Nominal Single or With or Piston Piston Piston
Cartridge Double Without With With Without
Size Acting Stops Buna-N Seals Viton?
 Seal Seals
8 Single Without 02-178662 02-178663 02-178653
 Double Without 02-178669 02-178670 02-178654
10 Single Without 02-166275 566418 566417
 Double Without 566419 566420 02-166313
 Single With 566421 566422 566337
 Double With 566423 566424 566338
12 Single Without 02-185700 02-185701 02-185699
 Double Without 02-185703 02-185704 02-185702
16 Single Without 566425 566426 889052
 Double Without 566428 566429 566427
20 Single Without 566431 566432 566430
 Double Without 566434 566435 566433
Part Numbers
WARNING
The use of pilot pistons
with check valve
assemblies may increase the
load applied to the valve poppet
which may result is reduced
fatigue life of the cartridge
?