 2022 Sun Hydraulics 1 of 5

MODEL

YDCC

Pressure sensitive regenerative assembly

CAPACITY: 45 L/min.

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 (CR) is added to the

pump flow to the blind end (CH), 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 (VR). Full pump pressure is then applied to the blind

end area developing maximum force.

sunhydraulics.com/model/

YDCC

TECHNICAL DATA

Body Type Line mount

Capacity 45 L/min.

Mounting Hole Diameter 8.6 mm

Mounting Hole Depth Through

Mounting Hole Quantity 2

Model Weight 0.72 kg.

NOTES

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.

For detailed information regarding the cartridges contained in this assembly, click on the models codes shown in the Included Components tab.

 2022 Sun Hydraulics 2 of 5

MODEL

YDCC

Pressure sensitive regenerative assembly

CAPACITY: 45 L/min.

Continued from

(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

E EPDM

V Viton

(A)

(K)

OPTION SELECTION EXAMPLE: YDCCLHNAK

PRIMARY CARTRIDGE

A A (with CBCA primary cartridge, 3:1 pilot ratio, standard capacity counterbalance valve)

A A (with CBCAX primary cartridge, Fixed setting, 3:1 pilot ratio, standard capacity counterbalance valve)

PORT DESIGNATORS

Modifiers Ports

K, K/S Ports CH, CR, VR: SAE 10;

C, C/S Ports CH, CR, VR: 1/2" NPTF;

V, V/S Ports CH, CR, VR: 1/2" BSPP;

MATERIAL DESIGNATOR No modifier - inch, aluminum /S - Inch, Ductile Iron /M - Metric, Aluminum /T - Metric, Ductile Iron

INCLUDED COMPONENTS

Part Description Quantity

CBCALHN Cartridge - Primary 1

CODAXEN 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

 2022 Sun Hydraulics 3 of 5

1 2 3 4

5 6 7 8

9 10 11 12

Face 2

Face 5

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Face 6

Face 7

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Face 10