Created on 11/13/2015

 2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 1 of 3

MODEL

FMDB

Electro-proportional 3-way flow control valve, meter in

SERIES 1 / CAPACITY: 23 L/min. / CAVITY: T-11A

This valve is a 3-way, meter-in, electro-proportional throttle. The flow path, unenergized, has the supply blocked at

port 1 and port 2 connected to tank at port 3. Energizing the coil generates a closing force on the spool, creating a

metering orifice in the 1 to 2 direction that is proportional to the coil command current. The valve self-compensates

in the 1 to 2 direction and with the addition of an external compensator will provide pressure compensated flow

control. Flow in the 2 to 3 direction is not proportional.

TECHNICAL DATA

Maximum Valve Leakage at 110 SUS (24 cSt) 30 cc/min.@70 bar

Manual Override Force Requirement 33 N/100 bar @ Port 1

Manual Override Stroke 2,5 mm

Seal kit - Cartridge Buna: 990-411-007

Seal kit - Cartridge Viton: 990-411-006

(X)CONTROL

X No Manual Override

D Twist/Lock (Dual) Manual Override

E Twist (Extended) Manual Override

L Twist/Lock (Detent) Manual Override

M Manual Override

T Twist (Momentary) Manual Override

(C)FLOW RATE

C .1 - 6 gpm (0,4 - 23 L/min.)

A .1 - 1.6 gpm (0,4 - 6.1 L/min.)

B .1 - 4 gpm (0,4 - 15 L/min.)

(N)SEAL MATERIAL

N Buna-N

V Viton

COIL *

No coil

212 DIN 43650 3 pin (Hirschman), 12 VDC

224 DIN 43650 3 pin (Hirschman), 24 VDC

712 Twin Lead, 12 VDC

724 Twin Lead, 24 VDC

912 Deutsch DT04-2P, 12 VDC

924 Deutsch DT04-2P, 24 VDC

* Additional coil options are available

snhy.com/

FMDB

TECHNICAL FEATURES

The transition between positions is closed.

Using 2 3-ways to create a 4-way allows one to choose existing flow ranges instead of cutting a special spool.

These valves may be pressure compensated by an external, modulating, logic element. Use LR_C-XHN for a bypass circuit or LP_C-XHN for a restrictive circuit.

The valve provides a degree of self-compensation and may be used as a flow control. To increase the accuracy of flow control, an external, modulating, logic

element can be used to maintain a constant flow over a wider range of flows and pressures. See performance curves for additional information.

All ports will accept 5000 psi (350 bar).

Coils are interchangeable with Sun's other full flow, solenoid-operated valves and can be mounted on the tube in either direction.

For optimum performance, an amplifier with current sensing and adjustable dither should be used. Dither should be adjustable between 100 - 250 Hz.

On models equipped with the D or L control, the detent mechanism in the manual override is meant for temporary actuation. The D, E, L and T manual control

assemblies have a mechanical life expectancy of approximately 7,000 cycles.

The momentary/twist override option "E" allows the operator to shift the valve by twisting the manual override clockwise 90 degrees.

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

Please verify cartridge clearance requirements when choosing a Sun manifold. Different valve controls and coils require different clearances.

NOTES

Model Code Example: FMDBXCNCONFIGURATION OPTIONS

Created on 11/13/2015

 2015 Sun Hydraulics Corporation See www.sunhydraulics.com for detailed product information 3 of 3

991-226 Detent/lock operation, manual override control kit, L control

991-227 Dual twist/lock operation, manual override control kit, D control

991-238 Momentary/twist operation, extended resolution, manual override control kit, E control

991-240 Red momentary/twist operation, manual override control kit, T control

991-241 Red detent/lock operation, manual override control kit, L control

991-242 Red dual twist/lock operation, manual override control kit, D control

991-243 Red momentary/twist operation, extended resolution, manual override control kit, E control