 2020 Sun Hydraulics 1 of 2

MODEL

SQDB

Kick-down, pilot-operated, balanced piston sequence valve

SERIES 1 / CAPACITY: 60 L/min. / CAVITY: T-11A

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

Kick-down sequence valves will kick completely open and remain open once the pressure at the inlet (port 1)

exceeds the valve setting, creating an unrestricted flow path from port 1 to port 2 (sequence). The pressure setting

at port 1 is relative to the drain (port 3). The valve remains open as long as the pressure at port 1 exceeds the

pressure at port 2. To reset the valve, pressure at port 1 must fall below the setting of the valve, flow from port 1 to

port 2 must cease, and pressure at port 2 must be equal to or greater than the pressure at port 1.

TECHNICAL DATA

Cavity T-11A

Series 1

Capacity 60 L/min.

Factory Pressure Settings Established at Kick down point

Maximum Operating Pressure 350 bar

Maximum Valve Leakage at 110 SUS (24 cSt) 30 cc/min.

Response Time - Typical 25 ms

Adjustment - No. of CW Turns from Min. to Max. setting 5

Valve Hex Size 22,2 mm

Valve Installation Torque 41 - 47 Nm

Adjustment Screw Internal Hex Size 4 mm

Locknut Hex Size 15 mm

Locknut Torque 9 - 10 Nm

Seal kit - Cartridge Buna: 990011007

Seal kit - Cartridge Polyurethane: 990011002

Seal kit - Cartridge Viton: 990011006

Model Weight 0.16 kg.

sunhydraulics.com/model/

SQDB

For Series 1 cartridges configured with an O control (panel mount handknob), a .75 in. (19 mm) diameter hole is required in the panel.

NOTES

 2020 Sun Hydraulics 2 of 2

(L)CONTROL

L Standard Screw Adjustment

C Tamper Resistant - Factory Set

K Handknob

O Handknob with Panel Mount

(A)ADJUSTMENT RANGE

A 100 - 3000 psi (7 - 210 bar), 1000 psi

(70 bar) Standard Setting

B 50 - 1500 psi (3,5 - 105 bar), 1000 psi

(70 bar) Standard Setting

C 150 - 6000 psi (10,5 - 420 bar), 1000

psi (70 bar) Standard Setting

D 25 - 800 psi (1,7 - 55 bar), 400 psi (28

bar) Standard Setting

E 25 - 400 psi (1,7 - 28 bar), 200 psi (14

bar) Standard Setting

W 150 - 4500 psi (10,5 - 315 bar), 1000

psi (70 bar) Standard Setting

(N)SEAL MATERIAL

N Buna-N

V Viton

MATERIAL/COATING

Standard Material/Coating

/AP Stainless Steel, Passivated

TECHNICAL FEATURES

All 3 port sequence cartridges are physically and functionally interchangeable (i.e. same flow path, same cavity for a given frame size).

Should not be used in load holding applications.

The main stage orifice is protected by a 150 micron stainless steel screen.

Pressure at port 3 is directly additive to the valve setting at a 1:1 ratio and should not exceed 5000 psi (350 bar).

Intended for use on the actuator side of the system as flow through the valve must cease for the valve to reset. If used on the pump side of a system, pump flow

must be shut off for the valve to reset.

Corrosion resistant cartridge valves are intended for use in corrosive environments and are identified by the model code suffix /AP for external stainless steel

components, or /LH for external zinc-nickel plated components. See the CONFIGURATION section for all options. For further details, please see the Materials of

Construction page located under TECH RESOURCES.

Incorporates the Sun floating style construction to minimize the possibility of internal parts binding due to excessive installation torque and/or cavity/cartridge

machining variations.

PERFORMANCE CURVES

Model Code Example: SQDBLANCONFIGURATION OPTIONS