Cla-Val 90AF-4A-3 - Manual (Page 2)

Modulating Action
The valve modulates when diaphragm
chamber pressure is held at an
intermediate point between inlet and
discharge pressure changes, the
pressure above the diaphragm is varied
allowing the valve to modulate and
compensate for the changes.
Principle of Operation
Full Open Operation
When pressure in the diaphragm chamber
is relieved to zone of lower pressure under
the valve. Flow in either direction is
permitted.
Tight Closing Operation
When pressure from the valve inlet (or
an equivalent independent operating
pressure) is applied to the diaphragm
chamber, the valve closes drip-tight.
SIZE 1 1/2 2 2 1/2 3 4 6 8 10 12 14 16
A 125 & 150 ANSI 8.50 9.38 11.00 12.00 15.00 20.00 25.38 29.75 34.00 39.00 41.38
AA 250 & 300 ANSI 9.00 10.00 11.62 13.25 15.62 21.00 26.38 31.12 35.50 40.50 43.50
B DIAMETER 5.62 6.62 8.00 9.12 11.50 15.75 20.00 23.62 28.00 32.75 35.50
C MAX. 5.50 6.50 7.56 8.19 10.62 13.38 16.00 17.12 20.88 24.19 25.00
D 1.12 1.50 1.69 2.06 3.19 4.31 5.31 9.25 10.75 12.62 15.50
E 125 & 150 ANSI 4.75 5.00 6.00 7.50 10.00 12.75 14.88 17.00 19.50 20.81
EE 250 & 150 ANSI 5.00 5.88 6.38 7.88 10.50 13.25 15.56 17.75 20.25 21.62
F 125 & 150 ANSI 3.25 4.00 4.00 5.00 6.00 8.00 8.62 13.75 14.88 15.69
FF 250 & 300 ANSI 3.50 4.31 4.38 5.31 6.50 8.50 9.31 14.50 15.62 16.50
VALVE SIZE 1 1/2 2 2 1/2 3 4 6 8 10 12
100-34 GLOBE PATTERN 26 49 80 107 200 440 771 1151 1600
100-34 ANGLE PATTERN 30 62 100 137
CV Factor
CV factor is defined as the number of gallons per minute of water at 60˚F. which will flow at a 60˚F. which will flow at a
one pound per square inch differential.
B
D
100AF
F FF
EE
E
B
C
Specify When Ordering
1. Size
2. Model 90AF-4A-3 Globe or Angle
3. Pressure Class
4. Temperature and fluid to be handled
5. Static and flowing line pressure
6. Operating fluid and pressure
(if other than line pressure)
7. Body and trim materials
8. End details
The valve shall be hydraulically-operated, diaphragm-actuated, globe or angle pattern
valve. It shall contain a resilient, synthetic rubber disc, having a rectangular cross
section, contained on three and on-half sides by a disc retainer and disc guide, forming
a tight seal against a single renewable seat. The valve stem shall be guided at both
ends by a bearing in the valve cover and an integral bearing in the valve seat. The
diaphragm assembly shall be the only moving part and shall form a sealed chamber in
the upper portion of the valve, separating operating pressure from line pressure. The
diaphragm consist of nylon fabric bonded with synthetic rubber and shall not be used
as a seating surface. Packing glands and/or stuffing boxes are not permitted and there
shall be no pistons operating the valve. All necessary repairs shall be possible without
removing the valve from the line. If the diaphragm becomes damaged the valve shall
close tight. This valve shall be a Model 100-34 (globe pattern or angle pattern) Hytrol
Valve as manufactured by Cla-Val. Newport Beach, California.
Purchase Specifications
PO Box 1325 Newport Beach CA 92659-0325
Phone: 949-722-4800 Fax: 949-548-5441
CLA-VAL
CLA-VAL CANADA CLA-VAL EUROPE
4687 Christie Drive
Beamsville, Ontario
Canada L0R 1B4
Phone: 905-563-4963
Fax: 905-563-4040 Chemin dés Mesanges 1
CH-1032 Romanel/
Lausanne, Switzerland
Phone: 41-21-643-15-55
Fax: 41-21-643-15-50
© COPYRIGHT CLA-VAL 2012 Printed in USA
Specifications subject to change without notice. www.cla-val.com
E-90AF-4A-3 (R-04/2012)
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