Created on 12/23/2015

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

MODEL

FKGB

2-way, pilot shifted, proportional throttle with bleed down, high capacity

SERIES 3 / CAPACITY: 120 L/min. / CAVITY: T-23A

This valve is a 2-way, 2 position, proportional throttle. Ports 2 and 3 are normally closed. Pilot pressure at port 1

creates a metering orifice between port 2 and 3 that is proportional to the pressure at 1. The force balance of the

flow forces, spring and pilot pressure results in a degree of partial self-compensation as the load pressure changes.

This valve includes a bleed down feature which connects ports 3 to 4 in the spring biased position. The bleed down

feature is useful when the valve is used as a meter-in flow control in circuits which include counterbalance valves

downstream of port 3. The bleed down connection is closed as the valve is piloted with increasing pressure at port

Pressure at port 4 directly opposes pressure at port 1.

TECHNICAL DATA

Maximum Operating Pressure 350 bar

Maximum Valve Leakage at 110 SUS (24 cSt) 65 cc/min.@70 bar

Pilot Volume Displacement 1,6 cc

Minimum Pilot Pressure to Operate 7 bar

Bypass orifice 0,8 mm

Hysteresis ± 2 %

Adjustment - Number of Clockwise Turns to Increase Setting 5

Locknut Hex Size 15 mm

Locknut Torque 9 - 10 Nm

Seal kit - Cartridge Buna: 990-023-007

Seal kit - Cartridge Polyurethane: 990-023-002

Seal kit - Cartridge Viton: 990-023-006

(X)CONTROL

X Not Adjustable

L Tuning Adjustment

(C)SPOOL CONFIGURATION

C Normally Closed

(N)SEAL MATERIAL

N Buna-N

V Viton

snhy.com/

FKGB

TECHNICAL FEATURES

Model Code Example: FKGBXCNCONFIGURATION OPTIONS

Created on 12/23/2015

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

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.

Ports 1 and 4 should be limited to 500 psi (35 bar).

Pressure at port 4 directly opposes pressure at port 1.

An optional tuning adjustment (L control) is offered to vary the pilot pressure required to control flow. The tuning adjustment provides a means to manually increase

or decrease flow at a given pilot pressure. The adjustment range is 50 - 250 psi (3,5 - 15 bar), 100 psi (7 bar) Standard Setting.

Accurate pressure compensated control requires that a constant pressure differential be maintained across the valve.

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