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High Pressure
Gauge
Isolation Valve
Reduced
Pressure
CLA-VAL 90-99
Pressure Reducing Valve
MODEL
90-99
(Full Internal Port)
Pressure Reducing Valve with
Low Flow By-Pass
• Modulating Control
• Maintains Constant Outlet Pressure Over a
Wide Range of Flows
• Durable Construction
• Convenient, Compact, Space Saving Design
The Cla-Val Model 90-99 Pressure Reducing Valve with Low Flow
By-Pass automatically reduces a higher inlet pressure to a steady
lower downstream pressure, regardless of changing flow rate. The
low flow by-pass capability is achieved by using a 2” grooved end
90-01 Pressure Reducing Valve as an integral part of the main
valve. This compact design saves space and makes for an easier
installation process.
The pressure reducing valve is hydraulically operated and controlled by a Cla-Val CRD pilot control, which senses pressure at the
main valve outlet. An increase in outlet pressure forces the CRD
pilot control to close and a decrease in outlet pressure opens the
control. This causes the main valve cover pressure to vary, modulating the main valve, thereby maintaining constant outlet pressure.
Schematic Diagram
Item Description
1 90-01 Pressure Reducing Valve
1-1 Hytrol (Main Valve)
1-2 X58C Restriction Tube Assembly
1-3 CRD Pressure Reducing Control
2 90-01 Pressure Reducing Valve (Bypass)
2-1 100-01 Hytrol, Grooved End (Main Valve)
2-2 X58C Restriction Tube Assembly
2-3 CRD Pressure Reducing Control
3 CGA Angle Valve
Optional Features
Item Description
A X46A Flow Clean Strainer
B CK2 (Isolation Valve)
C CV Flow Control (Closing)*
D Check Valves with Isolation Valve
P X141 Pressure Gauge
S CV Flow Control (Opening)*
V X101 Valve Position Indicator
Y X43 "Y" Strainer
*
The optional closing speed control on this valve should
always be open at least three (3) turns off its seat.
The pressure reducing low flow by-pass valve is also controlled by
a Cla-Val CRD pilot control, which is preset to a higher pressure
than the CRD pilot control on the main valve. The pressure reducing low flow by-pass valve responds to pressure at the main valve
outlet. When the CRD on the main valve closes, the CRD on the
pressure reducing low flow by-pass remains open, allowing flow to
by-pass the main valve. The bypass valve closes when the flow
decreases and the downstream pressure reaches the set-point of
its CRD pilot control.
Typical Applications
This valve has the flexibility to be installed in a distribution system where the demand varies over a wide range. This frequently occurs in industrial, residential, educational, high-rise buildings and other applications. Another important feature of the
valve is its space efficient configuration, allowing easy installation and maintenance.
We recommend providing adequate space around valve for maintenance work
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CLA-VAL
Copyright Cla-Val 2012 Printed in USA Specifications subject to change without notice.
P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: 949-722-4800 • Fax: 949-548-5441 • E-mail: claval@cla-val.com • Website cla-val.com
©
G
GG
GGG
D
Inlet
DD
DDD
F
FF
X
100-01
Threaded &
Flanged
A
C
(MAX)
K
J
H
Inlet
Outlet
AA
AAA
B
(Diameter)
W
100-01 Pattern: Globe (G), Angle (A), End Connections:
90-99
Valve
Selection
Basic Valve
100-01
Suggested
Flow
(gpm)
Suggested
Flow
(Liters/Sec)
100-01 Series is the full internal port Hytrol.
For Lower Flows Consult Factory *Globe Grooved Only
Threaded (T), Grooved (GR), Flanged (F) Sizes
Inches 4 6 8 10
mm 100 150 200 250
Pattern
End Detail
Maximum
Maximum
Intermittent
Minimum
Maximum
Maximum
Intermittent
Minimum
G, A G, A G, A G, A
F, GrF,
Gr*
Gr*
800 1800 3100 4900
990 2250 3900 6150
1111
50 113 195 309
62 142 246 387
0.06 0.06 0.06 0.06
Pilot System Specifications
Adjustment Ranges
CRD
2 to 30 psi
F,
F
15 to 75 psi
20 to 105 psi
30 to 300 psi*
*Supplied unless otherwise specified
Other ranges available, please consult
factory.
Temperature Range: Water: 180°
100-01 Series is the full internal port Hytrol
For 100-01 basic valves • Suggested flow calculations are based on flow through Schedule 40 Pipe.
*Globe Grooved Only
• Max continuous flow is approx. 20 ft/sec (6.1 meters/sec).
• Max intermittent is approx. 25 ft/sec (7.6 meters/sec).
Materials
Standard Pilot System Materials
Pilot Control: Bronze ASTM B62
Trim: Stainless Steel Type 303
Rubber:
Buna-N®Synthetic
Rubber
Optional Pilot System Materials
Pilot Systems are available with
optional Aluminum, Stainless Steel or
Monel materials.
Note: Available with remote sensing control
Materials
Component Standard Material Combinations
Body & Cover Ductile Iron Epoxy Cast Steel Bronze
Available Sizes 4" - 10" 4" - 10" 4" - 10"
Disc Retainer &
Diaphragm Washer
Trim: Disc Guide,
Seat & Cover Bearing
Disc Buna-N®Rubber
Diaphragm Nylon Reinforced Buna-N®Rubber
Stem, Nut & Spring Stainless Steel
For material options not listed, consult factory.
Cast Iron Cast Steel Bronze
Bronze is Standard
Stainless Steel is Optional
Pressure Ratings
Valve Body & Cover
Grade Material
ASTM A536 Ductile Iron B16.42 250 400 400
ASTM A216-WCB Cast Steel B16.5 285 400 400
ASTM B62 Bronze B16.24 225 400 400
Note: * ANSI standards are for flange dimensions only.
Flanged valves are available faced but not drilled.
‡ End Details machined to ANSI B2.1 specifications.
Valves for higher pressure are available; consult factory for details
Model 90-99 Dimensions (In Inches)
Valve Size (Inches) 46810
A Threaded
AA 150 ANSI
AAA 300 ANSI
AAAA Grooved End
B Dia.
C Max.
CC Max. Grooved End
D Threaded
DD 150 ANSI
DDD 300 ANSI
DDDD Grooved End
E
EE Grooved End
F 150 ANSI
FF 300 ANSI
G Threaded
GG 150 ANSI
GGG 300 ANSI
GGGG Grooved End
H NPT Body Tapping
J NPT Cover
K NPT Cover Tapping
Stem Travel
Approx. Ship Wt. Lbs.
X Pilot System 17 29 31 33
Y Pilot System 12 20 22 24
Center Plug
Z Pilot System 12 20 22 24
W Pilot System 34 34 36 38
Many factors should be considered in sizing pressure reducing valves, including inlet pressure, outlet pressure
and flow rates. For sizing questions or cavitation analysis, consult Cla-Val with system details.
————
15.00 20.00 25.38 29.75
15.62 21.00 26.38 31.12
15.00 20.00 25.38 —
11.50 15.75 20.00 23.62
10.62 13.38 16.00 17.12
9.31 12.12 14.62 —
————
7.50 10.00 12.69 14.88
7.88 10.50 13.25 15.56
7.50 — — —
————
4.25 6.00 7.56 —
4.50 5.50 6.75 8.00
5.00 6.25 7.50 8.75
————
5.00 6.00 8.00 8.62
5.31 6.50 8.50 9.31
5.00 — — —
.75 .75 1 1
.75 .75 1 1
.75 .75 1 1
1.1 1.7 2.3 2.8
140 285 500 780
(Recommended Maximum Pressure - psi)
Pressure Class
Flanged Threaded
ANSI
Standards*
Low Flow
By-Pass Valve
100-01 Grooved
H
Inlet
Inlet
AAAA
150
Class
DDDD
300
Class
J
K
Outlet
EE
GGGG
E-90-99 (R-01/2012)
End‡
Details
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