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SPECIFICATIONS
MIL-F-8901, MIL-F-15618,
MIL-F-52694C and MIL-F27629D (USAF)
-40°F to 180°F
Light petroleum products;
-5572, M 1 L- T -5624L and MIL-T83133A
Aluminum - 7 Ibs.
Stainless - 14 Ibs.
225 PSI
Flange and Pilot Housing:
Stainless Steel ASTM A 296
Aluminum 356T6
Pilot Valve:
Stainless Steel 303
Float Ball & arm:
Stainless Steel 303
M 1 L-G
MODEL
CFF21
Flanged Float Control
• Completely automatic operation
• No lubrication required
• No adjustments required
• Compact and easy to install
• Built-in float ball and control tester
• Conforms to rigid military specifications
The Cla-Val Model CFF21 Flanged Float Control is a float operated pilot control
installed in the water accumulation sump of a fuel filter/separator. It is designed
to automatically actuate a water drain valve (Model 100AF) and to sense a rapid
accumulation of water in the sump in excess of the capacity of the drain valve. If
the water level cannot be reduced by the drain valve, the float control signals the
fuel discharge valve to close until the water has been drained.
The Model CFF21 Flanged Float Control features an integral tester which allows
in-service testing of the pilot operation and the integrity of the float ball.
Conventional testers only test the operation of the control pilot mechanism, they
do not check the integrity of the float ball itself. A simple ballasting method is
used in the Model CFF21 making it possible to test the operation of the control
pilot and to determine if the float is sound and buoyant without the costly and
time consuming process of removing the control from the separator or injecting
water into the sump.
Purchase Specifications
This control shall be specifically designed to respond to changes in level of the interface surface
of the water and fuel inside the water sump and shall operate the diaphragm actuated water
drain valve and fuel discharge valve. The actuating fluids on the diaphragms of both the water
drain valve and the fuel discharge valve shall be relieved through the pilot valve to the outlet of
the water drain valve.
The float control shall consist of a mounting flange with integral pilot valve and float ball
assembly. By actuation of an external lever the float ball ballast may be removed.
This action permits the float to rise in fuel verifying its buoyancy. The pilot shall be a precisionlapped, rotary disc plate type valve. Porting arrangement shall permit control of a water drain
valve and a fuel discharge valve.
This control shall be the Model
CFF21 Flanged Float Control as manufactured by Cla-Val Newport Beach, California.
Integral Tester Feature (Patent Pending)
In normal operating position (1 ) the float ball ballast is fixed to the float for automatic water level
control. Removing the ballast from the float (2) allows the float ball to float in fuel (3 & 4). The
sequential operation of the water drain valve and the fuel discharge valve verifies the integrity of
the float ball and the proper functioning of the pilot control mechanism. This unique approach i,
the only positive means of totally checking the control function while the filter/separator is in service.
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Dimensions (in inches)
C
8 holes 1/2" diam.
spaced on 6.625 BCD
6.72
Note:
Float Ball and Arm
Dimensions will increase if
operating pressure
exceeds 225psi and/or
specific gravity of fuel is
greater than .8 (consult
factory).
Typical Applications
7.63
.94
WITH WATER DRAIN VALVE
AND PRODUCT RECOVERY TANK
SEPARATOR
WATER
ACCUMULATION
SUMP
SUPPLY CONNECTION
HIGH PREESURE SIDE
OF FILTER/SEPARATOR
X46 STRAINER
FROM SEPARATOR
FUEL
DISCHARGE
FROM SEPARATOR
WATER DISCHARGE
CONNECTION
5.38
5.38
CFF21-H2
FLANGED FLOAT
CONTROL
40AF-2C
FUEL DISCHARGE CONTROL VALVE
TO DRAIN
100AF
WATER DRAIN VALVE
22 1/2…
45…
1. Flange and Pilot Materials
2. Specific Gravity of fuel
3. Operating Pressure
TO FUEL SYSTEM
PILOT CONTROL
PORT MARKINGS
Without water drain valve
with product recovery tank
SEPARATOR
WATER
ACCUMULATION
SUMP
E-CFF21 (R-3/09)
SUPPLY CONNECTION
HIGH PREESURE SIDE
OF FILTER/SEPARATOR
X46 STRAINER
FROM SEPARATOR
FUEL
DISCHARGE
FROM SEPARATOR
WATER DISCHARGE
CONNECTION
CFF21-H2
FLANGED FLOAT
CONTROL
TO FUEL SYSTEM
40AF-2C
FUEL DISCHARGE CONTROL VALVE
Plug
PILOT CONTROL
PORT MARKINGS
TO DRAIN
Without water drain valve
or product recovery tank
LA-VAL
PO Box 1325 Newport Beach CA 92659-0325
Phone: 949-722-4800 Fax: 949-548-5441
CLA-VAL CANADA CLA-VAL EUROPE
4687 Christie Drive
Beamsville, Ontario
Canada L0R 1B4
Phone: 905-563-4963
Fax: 905-563-4040
©COPYRIGHT CLA-VAL 2009 Printed in USA
Specifications subject to change without notice.
Chemin dés Mesanges 1
CH-1032 Romanel/
Lausanne, Switzerland
Phone: 41-21-643-15-55
Fax: 41-21-643-15-50
www.cla-val.com
SEPARATOR
WATER
ACCUMULATION
SUMP
SUPPLY CONNECTION
HIGH PREESURE SIDE
OF FILTER/SEPARATOR
X46 STRAINER
FROM SEPARATOR
FUEL
DISCHARGE
CFF21-H2
FLANGED FLOAT
CONTROL
Check Valve
Represented By:
TO FUEL SYSTEM
40AF-2C
FUEL DISCHARGE CONTROL VALVE
Plug
PILOT CONTROL
PORT MARKINGS
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