High accuracy flow divider valve

Cavity: T-31A | Capacity:

Model

FSBDXAN

Control

Flow Split

Seal Material

Material/Coating

Where to buy

Technical features

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.

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.
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.

Technical Data

Cavity
T-31A
Series
1
Capacity
.6 - 3 gpm
Maximum Operating Pressure
5000 psi
Divisional Accuracy at Max Input Flow
±2.5%
Divisional Accuracy at Minimum Input Flow
±4.5%
Pressure Drop at Maximum Rated Input Flow
250 psi
Pressure Drop at Minimum Rated Input Flow
30 psi
Rated Input Flow with 33/67 Split
.45 - 2.2 gpm
Rated Input Flow with 40/60 Split
.5 - 2.5 gpm
Rated Input Flow with 50/50 Split
.6 - 3 gpm
Valve Hex Size
7/8 in.
Valve Installation Torque
30 - 35 lbf ft
Model Weight
.60 lb
Seal kit - Cartridge
Buna: 990-031-007
Seal kit - Cartridge
Polyurethane: 990-031-002
Seal kit - Cartridge
Viton: 990-031-006

Performance curves

CAD Files

Model CAD Files

Click the link of the file format you want to download.

Symbol CAD Files

Click the link of the file format you want to download.

.dwg

.dxf

Frequently asked questions

What parts of the Sun cartridge valve are field serviceable?
How big do my slip orifices have to be?
Why does Sun use 2 slip orifices?
Why am I getting a higher inaccuracy than Sun claims?
Most of the dividing-combining inaccuracies will average out, won't they?
Most of Sun's divider-combiners will do better than the published specs, won't they?
Can I synchronize two cylinders with Sun's divider-combiner?
How big is a drop of hydraulic oil?
What is the synchronizing feature?
How has Sun solved the hook breaking problem?
What is a priority flow divider?