FG/FCG-03 Model Series – Application Data

Functional Symbols

FCG–03

Inlet Outlet

FG–03

Gauge Gauge

Inlet Outlet

General Information

FC/FCG valves provide precise

adjustable control of flow rates in

hydraulic circuits. They are pressure

and temperature compensated to

minimize flow variation resulting from

changes in fluid pressure and

temperature. They can be used in

meter-in, meter-out and bleed-off

circuits.

Application Guidance

Flow Adjustment

Flow rate is adjusted by rotating the dial.

A lettered ( “A” through “E” ) indicator

marks approximately 4 1/2 revolutions,

from a fully closed to a fully opened

position.

Maximum throttle openings may be

limited by the addition of spacers to the

throttle shaft under the selector dial.

Spacers are available from Vickers for

installation by the user.

Number of Spacers % of Maximum Flow

3 15–20

2 35–45

1 65–75

Use spacers – Part No. 211026

Valve Locking

A standard key-locking device (2 keys

furnished) is supplied with these valves.

An optional device is also available.

Instead of using the key, the valve is

removed from its mounting to open the

access hole, which is on the front of the

valve. The valve is then returned to its

mounting and the new setting is made.

Then the access hole can be covered

using a screwdriver in the keyhole and

turning clockwise to trip the lock.

Ratings

Maximum Flow Capacity (based on oil

viscosity of 100 SUS @ 49 C (100 F)

106 lpm, 8833 ft

/min

(28 USgpm, 6468 in

/min)

Nominal Reverse Free Flow

FCG-03–28–22

5 bar @ 114 lpm (65 psi @30 USgpm)

Maximum Operating Pressure

207 bar (3000 psi)

Maximum Throttle Adj. Torque Req.

Adjusting Torque Proportional to Outlet

Pressure

2,26 Nm @210 bar

(20 in. lbs. @ 3000 psi)

Pressure Drop Information

Pressure Drop for reverse free flow over

check valve.

Pressure

bar (psi)

Volume

lpm (USgpm)

3 (45) 19 (5)

8 (120) 38 (10)

12 (175 ) 57 (15)

20 (290) 76 (20)

30 (440) 95 (25)

NOTE: The pressures in the pressure

drop chart give approximate pressure

drops (DP) when passing a flow of 100

SSU fluids having 0.865 specific gravity.

For any other viscosity, the pressure

drop (DP) will change as follows:

Other Viscosity

% of DP from table

(approx.)

75 93

150 111

200 119

250 126

300 132

350 137

400 141

For any other specific gravity

) the pressure drop (DP

) will be

approximately: DP

P (G

/G).

Fluids and Seals

The use of synthetic fire-resistant fluids

requires a valve with special seals. Add

the prefix “F3” to the model number

when phosphate esters type fluids or its

blends are to be used with standard

seals. Refer to Vickers data sheet 694,

“Hydraulic Fluids and Temperature

Recommendations for Industrial

Machinery.”

Subplate and Bolt Kits

Valves, subplates and mounting kits

must be ordered separately.

For example:

One (1) F(C)G-03-28–22 Valve

One (1) FGM-03SZ-10 Subplate

One (1) BKFG-03-645 Bolt Kit

(Bolt length = 3 inch)

Maximum recommended mounting bolt

torque: 40 Nm (350 lb. in.)

Mounting bolts, when provided by a

customer, must be SAE grade 7,

or better.

Weights

Valve 8.2 kg (18 lbs.). . . . . . . . . . . . . . . .

Subplate 4.5 kg (10 lbs.). . . . . . . . . . . .

Model Code

3 51 2

Special Seals

Omit if not required

F3 – Special seals for use with

phosphate ester type fluids

Type

F – Flow control

C – Integral check (omit if not required)

G – Manifold or subplate mounting

Nominal Valve Size

03 – 3/8”

Flow Range

28 – 106 lpm (28 USgpm)

Design Number

Subject to change

Installation dimensions remain

the same for design numbers

50 through 59.

Special Feature

–S10 – Overspeed control

Over Speed Control (–S10)

The flow control hydrostat under zero

flow conditions is spring offset to its full

open position. This permits an initial flow

greater than the throttle setting, and

may result in a momentary over speed

at the start of the feed cycle.

If this condition causes a problem in

your application, it can be greatly

reduced with the over speed control

option (S10).

The S10 features a screw which can be

adjusted to limit the hydrostat opening to

a point just above the maximum flow

requirements of the system.

Adjust the hydrostat as follows:

1. Back out the adjusting screw and

operate the system in the feed mode.

Adjust the throttle setting to the desired

flow rate.

2. Turn in the adjusting screw until the

feed rate drops, then back out the

adjusting screw just enough to restore

the original feed rate. The screw will

remain in this position.

S10 feature adjustment

Turn clockwise to decrease maximum flow,

Turn counterclockwise to increase maximum flow

Dimensions

millimeterm (inch)

15,24

(0.6)

Full out position

–S10 feature located

at right hand side of

valve as you face dial

38,1

(1.5)

30,2

(1.19)

Installation Dimensions

129

(5.08)

75,4

(2.97)

61,9

(2.44)

85,9

(3.38)

Inlet port “P”

129

(5.08)

(1.97)

Outlet port “C”

Revolution Indicator

132,6

(5.22)

101,6

(4.00)

84,6

(3.33)

6,35

(.25)

Dia.

71,3

(2.81)

63,5

(2.50)

Outlet pressure gauge test connection

1/2 NPT

∅

47,8

(1.88)

.406 Dia. Thru 15 (.59)

C’bore 7,9 (.31) Deep

4 places for mounting

Two rest pins furnished.

See subplate for locations.

Mounting surface

(Seals furnished)

Two keys furnished

6,35

(.25)

Dia.

Access hole covered when unit is locked.

Upon turning key, lock screw is accessible.

Loosen to change dial setting.

FG/FCG–03 Model Series

millimeter (inch)

Model No.

Port P Port C

FCG-03-28–22 Inlet connection for regulated flow or outlet

connection for reversed free flow.

Outlet connection for regulated flow or inlet

connection for reversed free flow.

FG-03–28–22 Inlet connection Outlet connection

Subplate

168,0

(6.62)

146,1

(5.75)

101,6

(4.00)

74,9

(2.95)

20,6

(0.81)

10,3 (0.406) dia. thru

15,0 (0.59) c’bore, 9,7 (0.38) deep

4 places for mounting

124,0

(4.88)

21,3

(0.84)

15,0

(0.59)

101,6

(4.0)

90,4

(3.56)

84,0

(3.31)

73,2

(2.88)

Inlet connection

20,6

(0.81)

38,1

(1.50)

NOTE: When the subplate is not used, a ma-

chined pad, as indicated by the shaded area on

the subplate, must be provided

for mounting. The pad must be flat within

0.0127mm (0.0005 inch) and smooth within 63

microinch. Mounting bolts, when provided by the

customer, must be SAE grade 7 or better.

Installation Dimensions

millimeter (inch)

103,12

(4.06)

0.76

(0.03)

.375–16 UNC–2B thd.

4 places

FGM–03SZ–10

0.281 Dia. – 0.31 deep

for rest pins – 2 places