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MODEL

RBDA

Bi-directional, direct-acting relief valve

SERIES 1 / CAPACITY: 95 L/min. / CAVITY: T-10A

(L)CONTROL

L Standard Screw Adjustment

C Tamper Resistant - Factory Set

(A)ADJUSTMENT RANGE

A 1200 - 3000 psi (85-210 bar), 1500 psi

(105 bar) Standard Setting

W 3000 - 5000 psi (210 - 350 bar), 4000

psi (280 bar) Standard Setting

(N)SEAL MATERIAL

N Buna-N

V Viton

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

The bi-directional, direct-acting relief cartridge is a normally closed, pressure-limiting valve used to protect hydraulic

components from pressure transients. When the pressure differential between ports 1 and 2 exceeds the valve

setting, the valve starts to open, throttling flow to limit the pressure rise, regardless of the direction.

TECHNICAL DATA

Cavity T-10A

Series 1

Capacity 95 L/min.

Maximum Operating Pressure 350 bar

Factory Pressure Settings Established at 15 L/min.

Maximum Valve Leakage at Reseat 0,7 cc/min.

Response Time - Typical 2 ms

Reseat >85% of setting

Hysteresis ≤ 3 %

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

Valve Hex Size 22,2 mm

Valve Installation Torque 41 - 47 Nm

U.S. Patent # 11,384,857

Seal kit - Cartridge Buna: 990310007

Seal kit - Cartridge Viton: 990310006

Model Weight 0.17 kg.

sunhydraulics.com/model/

RBDA

Model Code Example: RBDALANCONFIGURATION OPTIONS

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TECHNICAL FEATURES

Capacity from port 1 to port 2 is 25 GPM (95 L/min). Flow from port 2 to port 1 is rated at 10 GPM (40 L/min).

Recommended minimum setting is 1200 psi (85 bar). Note: At settings below 1200 psi (85 bar), the valve is rated for maximum transient flows of 25 GPM (95

L/min) only.

Because the modulating occurs inside the cartridge, these valves are immune to most of the problems associated with cavitation, namely noise and manifold

erosion.

The seals on the adjust screw are exposed to system pressure which means this valve can only be adjusted when the pressure is removed. The setting procedure

is; check the setting, remove the pressure, adjust the valve, check the new setting.

Valve is relatively insensitive to varying oil temperatures and oil borne contamination.

Select a spring range where the desired relief setting is approximately mid-range to high between the minimum and maximum pressure to ensure maximum valve

repeatability.

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

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