Created on 07/19/2016

 2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 2

MODEL

MBDB

1.5:1 pilot ratio, load reactive load control valve

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

3-Port Non-vented

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

Cavity T-11A

Series 1

Capacity 60 L/min.

Pilot Ratio 1.5:1

Maximum Recommended Load Pressure at Maximum Setting 270 bar

Maximum Setting 350 bar

Factory Pressure Settings Established at 30 cc/min.

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

Check Cracking Pressure 1,7 bar

Adjustment - Number of Counterclockwise Turns to Increase Setting 6.5

Reseat >85% of setting

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

Model Weight 0,20 kg

Seal kit - Cartridge Buna: 990-011-007

Seal kit - Cartridge Polyurethane: 990-011-002

Seal kit - Cartridge Viton: 990-011-006

(L)CONTROL

L Standard Screw Adjustment

C Tamper Resistant - Factory Set

(H)FUNCTIONAL SETTING RANGE

H 1000 - 4000 psi (70 - 280 bar), 3000 psi

(210 bar) Standard Setting

J 2000 - 5000 psi (140 - 350 bar), 3000

psi (210 bar) Standard Setting

(N)SEAL MATERIAL

N Buna-N

V Viton

snhy.com/

MBDB

Model Code Example: MBDBLHNCONFIGURATION OPTIONS

Created on 07/19/2016

 2016 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 2 of 2

TECHNICAL FEATURES

Set at least 1.3 times the maximum load induced pressure (1.5 times when the setting is less than 2000 psi or 140 bar).

Turn adjustment clockwise to decrease setting and release load.

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

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).

This valve is functionally a 3 port counterbalance valve. It seats as a poppet valve and modulates over a long stroke.

Full clockwise adjustment is less than 200 psi (14 bar).

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