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MODEL

FSEH

High capacity, closed center, flow divider-combiner valve

SERIES 3 / CAPACITY: 32 - 130 L/min. / CAVITY: T-33A

(X)CONTROL

X Not Adjustable

(A)FLOW SPLIT

A 50/50

(N)SEAL MATERIAL

N Buna-N

V Viton

NOTE: DATA MAY VARY BY CONFIGURATION. SEE CONFIGURATION SECTION.

High-capacity, closed-center flow divider/combiners are sliding-spool, pressure-compensated devices used to split

flow in one direction and combine flow in the opposite direction. These valves have approximate 15% greater

capacity than standard closed-center divider/combiners and are designed for use in tractive drive systems. Note:

Accuracy on these cartridges is not equivalent to the accuracy of standard closed-center divider/combiners.

TECHNICAL DATA

Cavity T-33A

Series 3

Capacity 32 - 130 L/min.

Maximum Operating Pressure 350 bar

Divisional Accuracy at Minimum Input Flow 50% ±6.5%

Divisional Accuracy at Max Input Flow 50% ±3.5%

Pressure Drop at Minimum Rated Input Flow 2 bar

Pressure Drop at Maximum Rated Input Flow 24 bar

Valve Hex Size 31,8 mm

Valve Installation Torque 203 - 217 Nm

Seal kit - Cartridge Buna: 990033007

Seal kit - Cartridge Polyurethane: 990033002

Seal kit - Cartridge Viton: 990033006

Model Weight 0.66 kg.

sunhydraulics.com/model/

FSEH

Model Code Example: FSEHXANCONFIGURATION OPTIONS

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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 combining mode, compensating characteristics will cause the leg of the circuit with the lowest load to receive the higher percentage of flow. If a synchronization

feature is not included, an additive accuracy error will be experienced with each full stroke of the actuator.

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.

Extreme pressure intensification can occur on multiple wheel drive vehicles.

Differential slip for tractive drive systems must be achieved with orifices in the body/manifold.

Divisional and combining accuracy are equal.

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 or

combining 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