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MODEL
YDES
Regenerative assembly
CAPACITY: 95 L/min.
B to A
The pressure sensitive regenerative valve assembly allows a double-acting, single rod cylinder to be extended
more rapidly using the same pump flow. To achieve this, oil from the rod end of the cylinder is added to the pump
flow to the blind end, increasing the rate of extension. It incorporates a pressure adjustable, counterbalance valve
that provides a smooth transition when the load is engaged and pressure in the blind end rises to approximately
25% of the set point of the counterbalance valve, at which time the regenerative flow decreases smoothly until rod
end flow is fully diverted to tank. Full pump pressure is then applied to the blind end area developing maximum
force.
snhy.com/
YDES
TECHNICAL DATA
Capacity 95 L/min.
Body Type Sandwich
Interface ISO 05
Body Features B to A
Stack Height 63 mm
Seal Plate Included (see notes) Yes
Model Weight 1.56 kg.
NOTES
Stack height value in technical data table includes seal retainer plate.
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Important: Carefully consider the maximum system pressure. The pressure rating of the manifold is dependent on the manifold material, with the port
type/size a secondary consideration. Manifolds constructed of aluminum are not rated for pressures higher than 3000 psi (210 bar), regardless of the port
type/size specified.
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MODEL
YDES
Regenerative assembly
CAPACITY: 95 L/min.
Continued from
previous page
(L)CONTROL
L Standard Screw Adjustment
C Tamper Resistant - Factory Set
(H)FUNCTIONAL SETTING RANGE
H 1000 - 4000 psi w/25 psi Check (70 - 280 bar w/ 1,7
bar Check), 3000 psi (210 bar) Standard Setting
A 1000 - 4000 psi w/4 psi Check (70 - 280 bar w/ 0,3
bar Check), 3000 psi (210 bar) Standard Setting
B 400 - 1500 psi w/4 psi Check (28 - 105 bar w/ 0,3
bar Check), 1000 psi (70 bar) Standard Setting
I 400 - 1500 psi w/25 psi Check (28 - 105 bar w/ 1,7
bar Check), 1000 psi (70 bar) Standard Setting
(N)SEAL MATERIAL
N Buna-N
V Viton
(B)
1 2 3 4
OPTION SELECTION EXAMPLE: YDESLHNBA
PRIMARY CARTRIDGE
B B (with CBEJ primary cartridge, 3:1 pilot ratio, standard capacity counterbalance valve)
B B (with CBEJX primary cartridge, )
INCLUDED COMPONENTS
Part Description Quantity
340-001 Pipe Plug 2
500-001-014 O-Ring 5
700-001 Seal Plate 1
CBEJLHN Cartridge - Primary 1
COFAXEN Cartridge 1
TECHNICAL FEATURES
Capacity refers to pump flow or regeneration flow, which is the flow coming out of the rod side of the cylinder, whichever is larger
This valve assembly will not prevent a load from extending the cylinder. The best way to prevent this is to use a vented counterbalance valve mounted directly to
the rod end of the cylinder. A non-vented valve will not work.
The ideal cylinder ratio to use with regeneration is 2:1, the blind end area being twice what the annular area at the rod end. A 2:1 cylinder in regen gives the same
speed extending as retracting.
Cylinders with ratios above 2:1 (large rods) will function correctly but with less speed gain. Intensification needs to be considered with higher ratios. A 2:1 cylinder
may generate a pressure on the rod side that is twice system pressure unless steps are taken to limit it.
Cylinders with ratios as low as 1.5:1 (small rods) may work if care is used in designing the application. As the rod diameter gets smaller in relation to the piston
diameter the flows increase dramatically and the force available drops accordingly.
Cylinders with ratios below 1.5:1 are unlikely to result in a working regenerative application because of the small area of the rod and the high flows that would be
generated.
When a cylinder is in the regenerative mode the only force available is the pressure working on the rod area.
The counterbalance valve in this assembly is not acting as a counterbalance valve; it is acting as a pressure sensitive unloading valve. The setting, however, relates
to the counterbalance world. With the CB*A set at 4000 psi (280 bar), the circuit will start to come out of regen with about 1000 psi (70 bar) of blind end pressure
and will then start to gain force somewhere above 1400 psi (90 bar).
Regeneration is only possible in the extend direction.
MANIFOLD FACES
FACE GRID
PRIMARY CARTRIDGE CONFIGURATION
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5 6 7 8
9 10 11 12
Face 2
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Face 5
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Face 6
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Face 7
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Face 8
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Face 10
