Created on 06/23/2015

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

MODEL

FSBD

High accuracy flow divider valve

SERIES 1 / CAPACITY: 2,5 - 12 L/min. / CAVITY: T-31A

Flow dividers are sliding-spool, pressure-compensated devices used to split oil flow to two different branches of a

circuit in a designated ratio. These valves are suitable for applications that use the following: unidirectional hydraulic

motors, hydraulic cylinders where flow division in one direction only is required, and multiple circuits that are

serviced from one pump supply.

TECHNICAL DATA

Maximum Operating Pressure 350 bar

Divisional Accuracy at Minimum Input Flow ±4.5%

Divisional Accuracy at Max Input Flow ±2.5%

Pressure Drop at Minimum Rated Input Flow 2 bar

Pressure Drop at Maximum Rated Input Flow 18 bar

Rated Input Flow with 50/50 Split 2,5 - 12 L/min.

Rated Input Flow with 40/60 Split 2,8 - 9,5 L/min.

Rated Input Flow with 33/67 Split 1,7 - 8,5 L/min.

Seal kit - Cartridge Buna: 990-031-007

Seal kit - Cartridge Polyurethane: 990-031-002

Seal kit - Cartridge Viton: 990-031-006

(X)CONTROL

X Not Adjustable

(A)FLOW SPLIT

A 50/50

B 40/60

C 33/67

(N)SEAL MATERIAL

N Buna-N

V Viton

MATERIAL/COATING

Standard Material/Coating

/AP Stainless Steel, Passivated

snhy.com/FSBD

TECHNICAL FEATURES

All flow divider and divider/combiner cartridges are physically interchangeable (i.e. same flow path, same cavity for a given frame size).

Operating characteristics cause the leg of the circuit with the greatest load to receive the higher percentage of flow in dividing mode. If a rigid mechanism is used to

tie actuators together, the lead actuator may pull the lagging actuator and cause it to cavitate.

In applications involving rigid mechanisms between multiple actuators, operating inaccuracy will cause the eventual lock-up of the system. If the mechanical structure

is not designed to allow for the operating inaccuracy inherent in the valve, damage may occur.

In motor circuits, rigid frames or mechanisms that tie motors together, and/or complete mechanical synchronized motion of the output shaft of the motors, either by

wheels to the pavement or sprockets to conveyors, will contribute to cavitation, lock-up and/or pressure intensification.

Variations in speed and lock-up can be attributed to differences in motor displacement, motor leakage, wheel diameter variance and friction of wheels on the driving

surface.

Model Code Example: FSBDXANCONFIGURATION OPTIONS

Created on 06/23/2015

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

This valve is a divider only; any attempt to flow backwards through the valve is not advised.

Dividers with unequal ratios have the higher flow at port 4.

Below the minimum flow rating there is not enough flow for the valve to modulate. It is effectively a tee. If flow starts at zero and rises, there will be no dividing

control until the flow reaches the minimum rating.

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