Created on 12/09/2015

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MODEL

MBGM

Balanced load control valve

SERIES 3 / CAPACITY: 240 L/min. / CAVITY: T-17A

Balanced load control valves combine a balanced modulating element with a reverse flow check. The check valve

allows free flow from the directional valve (port 2) to the load (port 1) while the pilot to open modulating element

controls flow from port 1 to port 2. Pilot pressure at port 3 determines the flow setting.

TECHNICAL DATA

Maximum Operating Pressure 350 bar

Maximum Valve Leakage at Reseat See Technical Features

Check Cracking Pressure 1,7 bar

Seal kit - Cartridge Buna: 990-017-007

Seal kit - Cartridge Polyurethane: 990-017-002

Seal kit - Cartridge Viton: 990-017-006

(X)CONTROL

X Not Adjustable

(I)MINIMUM CONTROL PRESSURE

I 300 psi (20 bar)

E 75 psi (5 bar)

G 150 psi (10,5 bar)

K 450 psi (33 bar)

M 525 psi (36,7 bar)

(N)SEAL MATERIAL

N Buna-N

V Viton

MATERIAL/COATING

Standard Material/Coating

/LH Mild Steel, Zinc-Nickel

snhy.com/MBGM

TECHNICAL FEATURES

This valve has no relief function. Not even thermal expansion relief.

Maximum valve leakage at reseat for I, K, M ranges is 5 drops/min. (0,3 cc/min.) at 200 psi (14 bar) below cracking pressure; E and G ranges is 3 cubic in/min. (50

cc/min.) at 50 psi (3,5 bar) below cracking pressure.

E and G ranges are not meant for zero leak type applications.

This valve is balanced against load pressures and therefore exhibits self-compensation. Flow is controlled by the pilot pressure. Because of dynamic seals,

performance is best in the meter out mode with port 1 being the load and port 2 being tank.

Backpressure at port 2 directly opposes pilot pressure at port 3.

This valve is a physical replacement for a counterbalance valve but probably won't work well in a cross-piloted cylinder application. A low pilot ratio is needed for

machine stability and a balanced load control has an infinitely high pilot ratio.

Applications that use a separate pressure source to the pilot have been successful in providing smooth and stable load control.

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).

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.

Model Code Example: MBGMXINCONFIGURATION OPTIONS