Created on 12/09/2015

 2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2

MODEL

MBEBX

Fixed setting, 1.5:1 pilot ratio, load reactive load control valve

SERIES 2 / CAPACITY: 120 L/min. / CAVITY: T-2A

3-Port Non-vented, Fixed Setting

Fixed setting, load reactive, load control valves with pilot assist combine two valves; a check valve and a relief

valve. The check valve allows free flow from the directional valve (port 2) to the load (port 1) while a direct-acting,

pilot-assisted relief valve controls flow from port 1 to port 2. Pilot assist at port 3 lowers the effective setting of the

relief valve at a rate determined by the pilot ratio.

TECHNICAL DATA

Pilot Ratio 1.5:1

Factory Pressure Settings Established at 30 cc/min.

Maximum Valve Leakage at Reseat 0,3 cc/min.

Check Cracking Pressure 1,7 bar

Reseat >85% of setting

Seal kit - Cartridge Buna: 990-202-007

Seal kit - Cartridge Polyurethane: 990-002-002

Seal kit - Cartridge Viton: 990-202-006

(L)FACTORY SET

L 4000 psi (280 bar)

K 3000 psi (210 bar)

M 5000 psi (350 bar)

(N)SEAL MATERIAL

N Buna-N

V Viton

snhy.com/MBEBX

TECHNICAL FEATURES

The maximum recommended load pressure for the K range is 2300 psi (154 bar). The highest cracking pressure for the K range will be less than 3350 psi (210 bar).

The maximum recommended load pressure for the L range is 3075 psi (215 bar). The highest cracking pressure for the L range will be less than 4350 psi (300 bar).

The maximum recommended load pressure for the M range is 3850 psi (270 bar). The highest cracking pressure for the M range will be less than 5350 psi (370

bar).

Note: The pressures listed under RANGE are approximate, mean values and should not be used for inspection purposes.

Note: The percentage difference between the cracking and reseat values for the fixed and adjustable versions are identical. However, the cracking point for the

adjustable control can be set via the adjustment mechanism to within +/- 50 psi (3,5 bar) of the specified value. In the case of the fixed -version, the setting

tolerance can only be maintained within a +/- 350 psi (20 bar) range. Thus for the 3000 psi (210 bar) fixed-setting model, with a rising pressure the valve will open

below 3350 psi (230 bar) and with a falling pressure will reseat above 2500 psi (170 bar). For the 4000 psi (275 bar) fixed-setting model, with a rising pressure the

valve will open below 4350 psi (300 bar) and with a falling pressure will reseat above 3100 psi (215 bar). For the 5000 psi (350 bar) fixed-setting model, with a

rising pressure the valve will open below 5350 psi (370 bar) and with a falling pressure will reseat above 4000 psi (275 bar).

Fixed-setting load control valves can be used to protect cylinder seals in outrigger circuits from damage due to thermal expansion, however, they probably should

not be applied in circuits in which a matched valve setting may be required such as dual cylinder applications.

Model Code Example: MBEBXLNCONFIGURATION OPTIONS

Created on 12/09/2015

 2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2

All 3-port counterbalance, load control, and pilot-to-open check cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size).

Fixed-setting load control valves offer a shorter cartridge extension than the adjustable version.

Backpressure at port 2 adds to the effective relief setting at a ratio of 1 plus the pilot ratio times the backpressure.

This valve is functionally a 3 port counterbalance valve. It seats as a poppet valve and modulates as a spool valve offering the best of both worlds.

These valves are capable of modulating over a broader range of flows than the pure poppet designs. The longer stroke allows us to incorporate a uni-directional

damping device that smooths the opening and lets the valve close quickly.

Sun load control and counterbalance cartridges can be installed directly into a cavity machined in an actuator housing for added protection and improved stiffness in

the circuit.

This valve has positive seals between all ports.

This valve has full relief capacity.

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

RELATED MODELS

MBEB 1.5:1 pilot ratio, load reactive load control valve