Cla-Val 90-21 Technical Manual

90-21

UL Listed Pressure Reducing Valve

INSTALLATION / OPERATION / MAINTENANCE

90-21 UL

MODEL

The Cla-Val 90-21 Pressure Reducing Valve is a pilot-operated
regulator, capable of holding downstream pressure to a predeter­mined pressure.

1. Special Note: For system protection, a pressure relief valve is
to be installed downstream (system side) of the 90-21 Pressure
Reducing Valve. Adequate drainage of the relief valve discharge
must be provided. The relief valve should be set above the “no
flow” or “dead end” shutoff pressure which will be 5 to 11 psi high­er than the set pressure.

2. Allow sufficient room around the valve assembly to make adjust­ments and for disassembly.

3. It is recommended that isolation valves be installed on both
ends of the 90-21 valve to facilitate isolating the valve for start-up,
testing and preventative maintenance.

4. BEFORE THE VALVE IS INSTALLED, PIPE LINES SHOULD

BE FLUSHED OF ALL CHIPS, SCALE, AND FOREIGN MATTER.

5. Place the 90-21 valve in the line with flow through the valve in
the direction indicated on the inlet nameplate mounted on inlet
flange or by arrow on nameplate mounted on side of threaded
ends valves. Check all fittings and hardware for proper makeup
and that no apparent damage is evident.

6. Cla-Val valves operate with maximum efficiency when mounted
in horizontal piping with the cover UP; however, other positions
are acceptable. Due to size and weight of cover and internal com­ponents of six inch and larger valves, installation with the cover up
is advisable. This makes periodic inspection of internal parts read­ily accessible.

Start-Up and Adjustment

1. Upon initial start-up and after any valve servicing, it is necessary
to follow these steps.

2. Prior to pressurizing the valve make sure the necessary gauges
to measure pressure are installed. Gauges should be installed
upstream (inlet) and downstream (outlet) of the valve. Unused
ports on main valve body can be used for this purpose.

Caution: During start-up and test procedures a large volume of
water may be discharged downstream. Check to make sure that
the downstream venting is adequate to prevent damage to per­sonnel and equipment.

3. Close upstream and downstream isolation valves.

4. Slowly open the upstream isolation valve enough to allow the
valve and pilot control system to fill with liquid.

5. Bleed air from the main valve (1) cover and pilot system by
slightly loosening fittings or plugs at all high points until a steady
flow of water is observed retighten. It may be necessary to do this
more than once.

6. Open fully the upstream isolation valve.

7. Slowly open the downstream isolation valve part way to estab­lish a low flow rate.

There must be liquid flowing through the valve during
pressure adjustments. Optimum valve performance occurs when

pressure setting is done with flow rate as low as practical.

8. Adjust the CRD Control (3) to desired pressure. To change pres­sure setting, turn the adjusting screw in (clockwise) to increase
delivery pressure. Turn the adjusting screw out (counterclockwise)
to decrease delivery pressure. The pressure should change
approximately 27 psi per turn. Only slight changes in adjustment
should be made to avoid damage to equipment. When the desired
setting has been made, tighten jam nut and replace cover.

NOTE: The “no flow” or “dead end” shutoff pressure will be 5 to 11
psi above the set pressure.

9. Open downstream isolation valve fully.

Maintenance

1. The Cla-Val 90-21 Pressure Reducing Valve requires no lubri­cation or packing and a minimum of maintenance. However, a peri­odic inspection schedule should be established to determine how
the fluid handled is affecting the efficiency of the valve.
Minimum of once per year.

2. When servicing the pilot control system, use care to prevent
damage. If it is necessary to remove fittings or components, be
sure they are kept clean and replaced exactly as they were.

3. Repair and maintenance procedures of the Cla-Val Hytrol Main
Valve and pilot control components are included in a more detailed
IOM manual. It can be downloaded from our web site (www.cla­val.com) or obtained by contacting a Cla-Val Regional Sales
Office.

4. When ordering parts always refer to the catalog number

and stock number on the valve nameplate.

Main valve
fails to open

Main valve
fails to close

Fails to
Regulate

No pressure at valve inlet

Main valve diaphragm assembly
inoperative

Pilot Valve (CRD) not opening:

1. No. spring compression

2. Damaged spring

3. Spring guide not in place

4. Yoke dragging on inlet nozzle

Foreign matter between disc
and
seat or worn disc. Scale on stem
or Diaphragm ruptured
Flow Clean Strainer plugged
CK2 (isolation valves) closed

Pilot Valve (CRD) remain open:

1. Spring compressed solid

2. Mechanical obstruction

3. Worn disc

4. Yoke dragging on inlet nozzle
diaphragm nut. Leakage from
vent hole in cover

5. Diaphragm damaged or loose
diaphragm nut. Leakage from
vent hole in cover

Air in main valve cover and/or
tubing

Pilot Valve (CRD) yoke dragging
on inlet nozzle

Pilot Valve (CRD) spring not in
correct range to control

Check inlet pressure

Disassemble, clean and polish
stem, replace detective parts

1. Tighten adjusting screw

2. Disassemble and replace

3. Assemble properly.

4. Assemble properly

Disassemble main valve,
remove matter, clean parts and
replace defective parts
Remove and clean or replace
Open isolation valves

1. Back off adjusting screw

2. Disassemble and remove
obstruction

3. Disassemble remove and
replace disc retainer assembly

4. Assemble properly

5. Disassemble. replace
diaphragm and/or tighten nut

Loosen top cover plug and fit­tings and bleed air

Assemble properly

Check outlet pressure require­ments

SYMPTOM PROBABLE CAUSE REMEDY

U

L

®

X58C

2.

X46A

4.

INLET

OUTLET

4

1

3

2

*SUGGESTED REPAIR PARTS

For a more detailed IOM Manual go to www.cla-val.com or contact a Cla-Val Regional Sales Office.

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

N-90-21 UL (R-4/08)

90-21 UL SCHEMATIC

CRD

COVER

PIPE PLUG

COVER BEARING

SPRING

STEM NUT

DIAPHRAGM WASHER

DISC RETAINER

BODY

*

SPACER WASHERS

DISC GUIDE

SEAT

PIPE PLUG

STEM

SEAT O-RING

STUD

8" and Larger

*

DIAPHRAGM

*

DISC

*

Repair Parts

Seat Screw

8" and Larger

(Globe

or

Angle)

PIPE PLUG

HEX NUT

8" and Larger

Cover Bolt

6" and Smaller

BASIC COMPONENTS

1 100-01 Hytrol (Main Valve)
2 X58C Restriction Fitting
3 CRD Pressure Reducing Control
4 X46A Flow Clean Strainer

HYTROL MAIN VALVE

inlet

Cover vent

(3/8" NPT)

Cap

Adjusting Screw

Jam Nut

Cover

Spring

Hex Nut

Belleville Washer

Diaphragm Washer

Diaphragm*

Yoke

Body and Seat Assy

Disc Retainer Assy

Gasket*

Plug, Body

*Machine Screw
(Fil.Hd) 8 Req'd

Spring Guide

Pressure Setting
Adjusting Screw
(Turn Clockwise to
Increase Setting)

3.

X58C

Tube Connector

(NPT)

Restriction
Plug

Orifice

2.

1.

Minimum Flow Required When Setting Pressure

Valve Size (inch)

1 1/2
2
2 1/2
3
4
6
8
10

16
26
37
57
100
220
390
620

Min. Flow (GPM)

X140-1

Security Cap

Option

90G-21

90A-21

MODELS

• U.L. Listed, ULC Listed, MEA Approved

• Globe or Angle Pattern

• Proven Reliable Design

• Available in Cast Bronze, Ductile Iron and
Cast Steel

• Accurate Pressure Control

• In Line Service

• Grooved Ends (1 1/2” - 8”)

Cla-Val 90G-21 (globe) and 90A-21 (angle) Pressure Re­ducing Valves are indispensable in any fire protection sys­tem. Our diaphragm actuated design is proven highly reliable
and easy to maintain. We offer both a globe or angle pattern
with a full range of adjustments. These valves are also avail­able in a variety of material options. Epoxy coating is
strongly recommended for all fire system valves (excluding
bronze valves). The 90G-21 and 90A-21 can be supplied
with optional internal and external epoxy coating of the main
valve wetted surfaces.

Special System Water Control Valves – Class II

UL Product Category VLMT – File No. Ex 2534

90-21 UL Listed
Fire Protection Valve

90-21 UL Listed
Grooved End
Fire Protection Valve

INLET

OUTLET

4

1

3

2

Schematic Diagram

Item Description

1 Model 100-01 Hytrol

(Globe or Angle)

2 X58C Restriction Tube Fitting

3 CRD Pressure Reducing Control

4 X46A Flow Clean Strainer

Cla-Val 90G-21 (globe) and 90A-21 (angle) Pressure Re­ducing Valves automatically reduce a higher inlet pressure
to a steady lower outlet pressure regardless of changing
flow rate and/or varying inlet pressure. The valves pilot con­trol system is very sensitive to slight downstream pressure
fluctuations, and will automatically open or close to maintain
the desired pressure setting. The downstream pressure can
be set over a wide range by turning the adjustment screw
on the CRD pilot control. The adjustment screw is protected
by a screw-on cover, which can be sealed to discourage
tampering.

Typical Application

Underwriters Laboratories requires the installation of pressure
gauges upstream and downstream of the Pressure Reducing Valve.
Also, a relief valve of not less than 1/2 inch in size must be installed
on the downstream side of the pressure control valve. Adequate
drainage for the relief valve discharge must be provided.

CLA-VAL 90-21

CLA-VAL 90-21

Model 55L

Fire Protection Pressure Reducing Valve

MEA

UL / ULC Listings

Size

1 1/2''

2"

2 1/2"

3''

4"
6"
8"

10"

Ductile Iron

150# F
UL / ULC
UL / ULC
UL / ULC
UL / ULC
UL / ULC
UL / ULC
UL / ULC

ULC

Ductile Iron

300 # F

UL
UL / ULC
UL / ULC
UL / ULC
UL / ULC
UL / ULC

UL/ULC

ULC

Ductile Iron

300# S
UL / ULC
UL / ULC

ULC

UL / ULC

Bronze

300# Threaded

UL / ULC
UL / ULC
UL / ULC
UL / ULC

Bronze
150# F

ULC
ULC
ULC
ULC

Bronze
300# F

ULC
ULC
ULC
ULC

Cast Steel

300# F

UL
UL
UL
UL
UL

Ductile Iron

Grooved End

UL
UL
UL
UL
UL
UL
UL

Ductile Iron

Grooved End

UL

UL
UL

Globe Pattern

Angle Pattern

PO Box 1325 Newport Beach CA 92659-0325 Phone: [phone]
Fax: [phone] Web Site: cla-val.com E-mail: [e-mail]

CLA-VAL

CLA-VAL CANADA CLA-VAL EUROPE

4687 Christie Drive
Beamsville, Ontario
Canada LOR 1B4
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]

Chemin des Mésanges 1
CH-1032 Romanel/
Lausanne, Switzerland
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]

Copyright

CLA-VAL 2008 Printed in USA Specifications subject to change without notice.

CLA-VAL UK

Dainton House, Goods Station Road
GB - Tunbridge Wells
Kent TN1 2 DH England
Phone: [phone]
Fax: [phone]
E-Mail: [e-mail]

©

Represented By:

Valve Size

Maximum Flow Rate
(GPM of Water)

10"

––

29.75

31.12
––

9.25
––

17.12
––

11.81
––

––

14.88

15.56
––
––

8.62

9.31
––

11.50

1

1

⁄2 "

7.25

8.50

9.00

8.50

1.12

1.94

5.50

4.10

2.81

2.81

3.25

4.00

4.25
––

1.88

4.00

4.25
––

7.50

8.10

2"

9.38

9.38

10.00

9.00

1.50

2.13

6.50

5.00

3.31

3.31

4.75

4.75

5.00

4.75

3.25

3.25

3.50

3.25

7.75

8.00

2

1

⁄2"

11.00

11.00

11.62

11.00

1.69

2.50

7.56

6.88

4.00

4.00

5.50

5.50

5.88
––

4.00

4.00

4.31
––

7.75

–

3"

12.50

12.00

13.25

12.50

2.56

6.00

8.19

6.50

4.56

4.56

6.25

6.00

6.38

6.00

4.50

4.00

4.38

4.50

8.00

8.13

4"

––

15.00

15.62

15.00

3.19

4.13

10.62

8.80

5.75

5.75
––

7.50

7.88

7.50
––

5.00

5.31

5.00

9.00

9.31

6"

––

20.00

21.00

20.00

4.31

6.00

13.38

11.10

7.88

7.88
––

10.00

10.50
––
––

6.00

6.50
––

9.50

10.50

8"

––

25.38

26.38

25.38

5.31

7.25

16.00

14.50

10.00

10.00
––

12.75

13.25

––
––

8.00

8.50
––

10.50

11.50

Size: 175 lb. Class 1 1/2” - 8” (Globe)

2” - 6” (Angle)

300 lb. Class 1 1/2” - 8” (Globe)

2” - 6” (Angle)

End Details:

150 ANSI B16.42 (Ductile Iron)

(Bronze)
300# (Ductile Iron)
300# (Cast Steel)

.

300# (Ductile Grooved End).

Pressure Differential: 10 PSI Min.

Pressure Adjustment Range:

175 lb. Class

30 – 165 psi

300 lb. Class

30 – 165 psi

Temperature Range: Water to 180°F Max.

Materials

Main valve body & cover:

Ductile Iron - ASTM A536

Main valve internal trim:

Bronze ASTM B61

Pilot control system–

Pilot control valve:

Bronze ASTM B62 with
Stainless Steel 303 internal trim

Copper tubing with brass fittings

Main valve and pilot valve

diaphragm and disc:

Buna-N

®

synthetic rubber

1

1

⁄2"

2"
2

1

⁄2"

3"
4"
6"
8"

10"

160
262
373
576

992
2251
3900
6150

Flow Capacity Table

1. Model Number 90-21

2. Size

3. Globe or Angle Pattern

4. Main Valve Body and
Cover Material

5. Threaded, Flanged or Grooved

6. Pressure Class

7. Optional Epoxy Coating
(specify with suffix “KC)

When Ordering
Please Specify

E-90G-21 (R-7/08)

Dimensions

VALVE SIZE (inches)

A THREADED
AA 150 ANSI
AAA 300 ANSI
AAAA GROOVED
B
BB GROOVED
C (MAX)
CC (MAX) GROOVED
D
DD GROOVED
E THREADED
EE 150 ANSI
EEE 300 ANSI
EEEE GROOVED
F THREADED
FF 150 ANSI
FFF 300 ANSI
FFFF GROOVED
G (MAX)
GG (MAX)

D

G

C

B

A

AA

AAA

SPECIAL NOTE: THE MODEL 90-21 CAN BE SUPPLIED WITH INTERNAL EPOXY COATING OF THE MAIN VALVE. THIS OPTION
IS U.L. FILE NO. EX2855, C.C. NO. HNFX EPOXY COATING IS STRONGLY RECOMMENDED FOR ALL CAST VALVES.

F FFF

FF

E

EE

EEE

GG

(MAX)

DD

PRESSURE REDUCING CONTROL ADJUSTMENT;
TURN THE ADJUSTING STEM CLOCKWISE TO INCREASE
THE SETTING

CC

BB

AAAA

(MAX)

OUTLETINLET

4" SIZE
SHOWN

FFFF

EEEE

OUTLET

INLET

250

––
756
790

––
235

––
435

––
300

––

––
378
395

––

––
219
236

––
292

––

40

184
216
229
216

28

52
140
104

71

71

83
102
108

––

48
102
108

––
191
206

50

238
238
254
228

38

54
161
127

84

84
121
121
127
121

83

83

89
121
197
203

65

279
279

295

279

43

73
192
175
102
102
140
140
149

––
102
102
109

––
197

–

80

318
305
337
318

65

6.00
208
165
116
116
159
152
162
152
114
102
111
114
203
207

100

––
381
397
381

81

4.13
270
223
146
146

––
191
200
191

––
127
135
127
228
236

150

––
508
533
508
109

6.00
340
281
200
200

––
254
267

––

––
152
165

––
241
267

200

––
645
670
645
135
184
406
369
254
254

––
324
349

––

––
203
216

––
267
292

VALVE SIZE

(mm)

A THREADED
AA 150 ANSI
AAA 300 ANSI
AAAA GROOVED
B
BB GROOVED
C (MAX)
CC (MAX) GROOVED
D
DD GROOVED
E THREADED
EE 150 ANSI
EEE 300 ANSI
EEEE GROOVED
F THREADED
FF 150 ANSI
FFF 300 ANSI
FFFF GROOVED
G (MAX)
GG (MAX)

Hytrol Valve

Description

The Model 100-01 Hytrol Valve is the main valve for the
CIa-VaI Model 90-21 Pressure Reducing Control Valve.
It is a hydraulically operated, diaphragm-actuated, globe
or angle pattern valve.

This valve consists of three major components; body, di­aphragm assembly, and cover. The diaphragm assembly
is the only moving part. The diaphragm assembly
uses a diaphragm of nylon fabric bonded with synthetic
rubber. A synthetic rubber disc, contained on three and
one half sides by a disc retainer and disc guide, forms a
seal with the valve seat when pressure is applied above
the diaphragm. The diaphragm assembly forms a sealed
chamber in the upper portion of the valve, separating op­erating pressure from line pressure.

INSTALLATION/OPERATION/MAINTENANCE

MODEL

100-01 UL

Troubleshooting

The following trouble shooting information deals strictly with
the “Hytrol Valve.” This assumes that everything but the
main valve itself has been completely isolated, i.e., each
part of the control system is hydraulically blocked from the
Hydro valve. All troubleshooting is possible without remov­ing the valve from the line or removing the cover.

The Hydro valve has only one moving part (the diaphragm
and disc assembly). So, there are only three major types of
problems to be considered:

First: Valve is stuck - that is the diaphragm assembly is not
free to move through a full stroke either from open to close
or vice versa.

Second: Valve is free to move and can’t close because of
a worn out diaphragm.

Third: Valve leaks even though it is free to move, and the
diaphragm isn’t leaking.

SERVICE SUGGESTIONS

SYMPTOM PROBABLE CAUSE REMEDY

Fails to Lack of cover chamber Check upstream
close pressure pressure, X46 or

tubing for obstruction.

Diaphragm damaged. Replace diaphragm
(See Diaphragm Check,
Steps 1-3)

Corrosion or excessive Clean and polish stem
scale build up on valve Inspect and replace
stem. (See Freedom of any damaged or badly
Movement Check, eroded part.
Step 4.)

Mechanical obstruction. Remove obstruction.
Object lodged in valve.
(See Freedom of Move­ment Check, Step 4.)

Worn Disc Replace disc.
(See Tight Seating
Check, Step 4.)

Fails to Closed upstream and/ Open Valves
open or downstream isolation

valves in main line.

Insufficient line pressure. Check pressure.

Corrosion or excessive Clean and polish stem
scale build up on valve Inspect and replace
stem. (See Freedom of damaged or badly
Movement Check Step 4) eroded part.

For Model 90-21 UL Listed Pressure
Reducing Valve

100-01 UL

Diaphragm Check (#1 )

1. Shut off pressure to the 90-21 valve by slowly closing upstream and

downstream isolation valves.
CAUTION: The valve cannot be serviced under pressure. Where
there are no isolation valves, It will be necessary to deactivate the sys­tem.

2. Disconnect or close all pilot control lines to the valve cover and
leave only one fitting in highest point of cover open to atmosphere.

3.With the cover vented to atmosphere, slowly open upstream isola­tion valve to allow some pressure into the valve body. Observe the
open cover tapping for signs of continuous flow. It is not necessary to
fully open isolating valve. Volume in cover chamber capacity chart will
be displaced as valve moves to open position. Allow sufficient time for
diaphragm assembly to shift positions. If there is no continuous flow,
you can be quite certain the diaphragm is sound and the diaphragm
assembly is tight. If the fluid appears to flow continuously

this is a good reason to believe the diaphragm is either damaged or it
is loose on the stem. In either case, this is sufficient cause to remove
the valve cover and investigate the leakage. (See “Maintenance” Sec­tion for procedure.)

COVER CHAMBER CAPACITY

(Liquid Volume displaced when valve opens)

Valve size (inches) Displacement

Gallons Liters

1 1/4 .020 .07
1 1/2 .020 .07
2 .032 .12
2 1/2 .043 .16
3 .080 .30
4 .169 .64
6 .531 2.0
8 1.26 4.8
10 2.51 9.5

Freedom of Movement Check (#2)

4. Determining the Valve’s freedom of movement can be done after

all pressure is removed from the valve.
After closing inlet and outlet isolation valves and bleeding pressure
fro the valve, check that the cover chamber and the body are tem­porarily vented to atmosphere. Insert fabricated tool into threaded
hole in top of valve stem, and lift the diaphragm assembly manu­ally. The tool is fabricated from rod that is threaded on one end to
fit valve stem and has a "T" bar handle of some kind on the other
end for easy gripping. (See chart in step 4 of "Disassembly" Sec­tion.)

Place marks on this diaphragm assembly lifting tool when the valve
is closed and when manually positioned open. The distance be­tween the two marks should be approximately the stem travel shown
in the chart.
If the stroke is different than that shown, there is a good reason to
believe something is mechanically restricting the stroke of the valve.
The cover must be removed, and the obstruction located and re­moved. The stem should also be checked for scale build-up. (See
"Maintenance" Section for procedure.)

Freedom of Movement Check (#2)

5. Test for seat leakage by applying inlet pressure to the cover

of the valve, wait until it closes, and then close the isolation
valve downstream of the Hytrol valve. Install a pressure gauge
between the two closed valves. Watch the pressure gauge. If
the pressure begins to climb, then either the isolation valve is
permitting pressure to creep back, or the Hytrol valve is allow­ing pressure to go through it. Usually the pressure at the Hytrol
valve inlet will be higher than on the isolation valve discharge,
so if the pressure goes up to the inlet pressure, you can be
sure the Hytrol valve is leaking. If it goes up to the pressure on
the isolation valve discharge, the Hytrol valve is holding tight,
and it was just the isolation valve leaking.

Preventative Maintenance

Cla-Val Hytrol valves require no lubrication or packing and a
minimum of maintenance. However, a periodic inspection sched­ule should be established to determine how the operating condi­tions of the system are effecting the valve. The effect of these
actions must be determined by inspection.

Disassembly

Inspection or maintenance can be accomplished without remov­ing the valve from the line.

1. Close upstream and downstream isolation valves to shut off
all pressure to the valve.
WARNING: Maintenance personnel can be injured and equip­ment damaged if disassembly is attempted with pressure in the
system.

2. Loosen tube fittings to remove pressure form the valve body
and cover chamber. After pressure had been released from the

valve use care to remove the controls and tubing. Note and
sketch position of tubing and controls for reassembly. The
schematic on the E-90-21 sheet can be used as a guide when
reassembling pilot system.

3. Remove cover nuts and remove cover. If the valve has been
in service for any length of time, chances are the cover will have
to be loosened by driving upward along the edge of the cover
with a dull cold chisel.

STEM TRAVEL

(Fully Open to Fully Closed)

Valve Size (inches) Travel (inches)

Inches MM Inches MM

1 1/4 32 0.4 10
1 1/2 40 0.4 10
2 50 0.6 15
2 1/2 65 0.7 18
3 80 0.8 20
4 100 1.1 28
6 150 1.7 43
8 200 2.3 58

10 250 2.8 71

Reassembly

1. Reassembly is the reverse of the disassembly procedure. If a new
disc has been installed, it may require a different number of spacer
washers to obtain the right amount of "grip" on the disc. When the di­aphragm assembly has been tightened to a point where the di­aphragm cannot be twisted, the disc should be compressed very
slightly by the disc guide. Excessive compression should be avoided.
Use just enough spacer washers to hold it firmly.

2. Make sure the stem nut is made up very tight. Attach a good fit­ting wrench to the nut and give it a sharp "rap" rather than a steady
pull. Usually several blows are sufficient to tighten the nut for final
tightening. Failure to do so could allow the diaphragm to pull loose
and tear when subjected to pressure.

3. Carefully install the diaphragm assembly by lowering the stem
through the seat bearing. Take care not to damage the stem or bear­ing. Line up the diaphragm holes with the stud or bolt holes on the
body. On larger valves with studs, it may be necessary

to hold the diaphragm assembly up while stretching the di­aphragm over the studs.

4. Put spring in place and replace cover. Maker sure diaphragm
is laying smooth under cover.

5. Tighten cover nuts firmly using a cross-over pattern until all nuts
are tight.

Test Procedure After Valve Assembly

1. Check the diaphragm assembly for freedom of movement by
inserting a rod into the threaded hole in the top of the valve
stem and lifting the diaphragm assembly manually. The di­aphragm assembly should move freely without any signs of
sticking or grabbing. (See "Freedom of Movement Check" sec­tion.

2. Re-install the pilot system and tubing exactly as it was prior to
removal.

3. Follow steps under "Start-Up and Adjustment" Section in N­90-21 UL Sheet.

When block and tackle or a power hoist is to be used to lift valve
cover, insert proper size eye bolt in place of the center cover plug.
On 8” valves only, there are 4 holds 3/8" - 11 size where jacking
screws maybe inserted to break cover loose from the body and then
4 eye bolts may be inserted for lifting purposes. Pull cover straight

up to keep from damaging the integral seat bearing and stem.

4. Remove the diaphragm and disc assembly from the valve body.
With smaller valves this can be accomplished by hand, pulling
straight up on the stem so as not to damage the seat bearing.

On large valves, an eye bolt of proper size can be installed in the
stem and the diaphragm assembly can be then lifted with a block
and tackle or power hoist. Take care not to damage the stem or bear­ings. The valve won't work if these are damaged.

5. The next item to remove is the stem nut. Examine the stem

threads above the nut for signs of mineral deposits or corrosion. If
the threads are not clean, use a wire brush to remove as much of the
residue as possible. Attach a good fitting wrench to the nut and give
it a sharp “rap” rather than a steady pull. Usually several blows are
sufficient to loosen the nut for further removal. On the smaller valves,
the entire diaphragm assembly can be held by the stem in a vise
equipped with soft brass jaws before removing the stem nut.

The use of a pipe wrench or a vise without soft brass jaws scars the
fine finish on the stem. No amount of careful dressing can restore the
stem to its original condition. Damage to the finish of the stem can
cause the stem to bind in the bearings and the valve will not open or
close.

6. After the stem nut has been removed, the diaphragm assembly
breaks down into its component parts. Removal of the disc from the
disc retainer can be a problem if the valve has been in service for a
long time. Using two screwdrivers inserted along the outside edge
of the disc usually will accomplish its removal. Care should be taken
to preserve the spacer washers in water, particularly if no new ones
are available for re-assembly.

7. The only part left in the valve body is the seat which ordinarily
does not require removal. Careful cleaning and polishing of inside
and outside surfaces with 400 wet/dry sandpaper will usually re­store the seat’s sharp edge. If, however, it is badly worn and re­placement is necessary, it can be easily removed.

Seats in valve sizes 1 1/4” through 6” are threaded into the valve
body. They can be removed with accessory X109 Seat Removing
Tool available from the factory. On 8” and larger valves, the seat is
held in place by flat head machine screws. Use a tight-fitting, long
shank screwdriver to prevent damage to seat screws. If upon re­moval of the screws the seat cannot be lifted out, it will be neces­sary to use a piece of angle or channel iron with a hole drilled in the
center. Place it across the body so a long stud can be inserted
through the center hole in the seat and the hole in the angle iron.
By tightening the nut a uniform upward force is exerted on the seat
for removal.

NOTE: Do not lift up on the end of the angle iron as this may force
the integral bearing out of alignment, causing the stem to bind.

Lime Deposits

One of the easiest ways to remove lime deposits from the valve
stem is to dip it in a 5-percent muriatic acid solution just long
enough for the deposit to dissolve. This will remove most of the
common types of deposits. CAUTION: USE EXTREME CARE

WHEN HANDLING ACID, RINSE PARTS IN WATER BEFORE
HANDLING. If the deposit is not removed by acid, the a fine grit

(400) wet or dry paper can be used with water.

Inspection of Parts

After the valve has been disassembled, each part should be ex­amined carefully for signs of wear, corrosion, or any other abnor­mal conditions. Usually, it is a good idea to replace the rubber
parts (diaphragm and disc) unless they are free of signs of wear.
Any other parts which appear doubtful should be replaced.

100-01 UL

VALVE STEM THREAD SIZE

Valve Size Thread Size (UNF Internal)

1 1/4"

—2 1/2" 10—32
3"—4" 1/4—28
6"—8" 3/8—24

COVER CENTER PLUG SIZE

Valve Size Thread Size (NPT)

1 1/4"

—1 1/2" 1/4"
2"—3" 1/2"
4"—6" 3/4"

8" 1"

NUT

ANGLE OR CHANNEL IRON

LONG STUD OR BOLT

NUT OR BOLT HEAD

DO NOT

LIFT

VALVE SEAT

VALVE BODY

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

100-01 UL

N-100-01 UL (R-1/08)

When ordering please specify: All nameplate data, Description, Item number

1

5

8

10

14

16

6

17

7

9

OUTLETINLET

GLOBE PATTERN

9

26

27

12

15

14

16

INLET

OUTLET

ANGLE PATTERN

22

23

13

12

14

10

11

15

23

TOP VIEW

8" - 24" SEAT DETAIL

1 1/4" - 6" SEAT DETAIL

4

24

2

25

13

14

3

Item Description

1. Pipe Plug

2. Drive Screws (for nameplate)

3. Hex Nut (8” and larger)

4. Stud (8” and larger)

5. Cover Bearing

6. Cover

7. Stem Nut

8. Diaphragm Washer

9. Diaphragm

10. Spacer Washers

11. Disc Guide

12. Disc Retainer

13. Disc

14. Stem

15. Seat

16. Body

17. Spring

22. Flat Head Screws (8” and larger)

23. Seat O-Ring

24. Hex head Bolt (1 1/4” thru 4”)

25. Nameplate

26. Upper Spring Washer (Epoxy coated valves only)

27. Lower Spring Washer (Epoxy coated valves only)

28. Cover Bearing Housing (16” only)

29. Cover O-Ring (16’” only)

30. Hex Bolt (16” only)

31. Pipe Cap (16” only)

PARTS LIST

90-21/690-21 UL

MODEL

INSTALLATION / OPERATION / MAINTENANCE

Performance Characteristics of UL listed

90-21 Pressure Reducing Valves

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

N-90-21 UL Performance Characteristics (R-4/08)

VALVE SIZE TEST DESCRIPTION UL TEST RESULTS

1-1/2" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS; RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS AT 80
GPM & IS REDUCED UNTIL FLOW IS
ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 30 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE AT
ZERO FLOW RANGED BETWEEN 40 TO 45 PSI

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW
WAS 175 PSI

1-1/2" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS; RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS AT 80
GPM & IS REDUCED UNTIL FLOW IS
ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 30 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE AT
ZERO FLOW RANGED BETWEEN 38 TO 41 PSI

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW
WAS 175 PSI

2" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS
AT125GPM & IS REDUCED UNTIL FLOW
IS ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 30 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE AT
ZERO FLOW RANGED BETWEEN 40 TO 45 PSI

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW
WAS 175 PSI

3" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS AT
275 GPM & IS REDUCED UNTIL FLOW IS
ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 30 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE AT
ZERO FLOW RANGED BETWEEN 35 TO 38 PSI

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW
WAS 175 PSI

4" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS; RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS AT
500 GPM & IS REDUCED UNTIL FLOW IS
ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 30 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE AT
ZERO FLOW RANGED BETWEEN 37 TO 42 PSI

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW
WAS 172 PSI

6" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS; RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS AT
700 GPM & IS REDUCED UNTIL FLOW IS
ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 30 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE AT
ZERO FLOW RANGED BETWEEN 35 TO 40 PSI

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW
WAS 170 PSI

8" GLOBE

DEAD-END SHUT-OFF CHARACTERIS­TICS; RECORD OUTLET PRESSURE AT
ZERO FLOW WHEN FLOW STARTS AT
700 GPM & IS REDUCED UNTIL FLOW IS
ZERO

WITH OUTLET PRESSURE CONTROL SETPOINT AT 29 PSI & INLET PRES­SURES FROM 75 TO 300 PSI, THE RECORDED OUTLET PRESSURE IS
EQUAL TO AN ACCEPTABLE PLUS OR MINUS 10%

WITH OUTLET PRESSURE CONTROL SETPOINT AT 165 PSI & INLET PRES­SURE AT 300 PSI, THE RECORDED OUTLET PRESSURE AT ZERO FLOW IS
EQUAL TO AN ACCEPTABLE PLUS OR MINUS 10%

1-1/2" 90G-21

OBSERVED FLOW RATE WHEN INLET PRESSURE

DROPS BELOW OUTLET PRESSURE SET POINT

200

175

150

125

100

75

50

25

0

0 50 100 150 200

FLOW (GPM)

Inlet @ 155 psi; Outlet Setting @165 psi

Inlet @ 100 psi; Outlet Setting @165 psi

Inlet @ 50 psi; Outlet Setting @165 psi

Inlet @ 20 psi; Outlet Setting @ 30 psi

1-1/2" 90A-21

Inlet @ 155 Outlet Setting @ 165 psi

Inlet @ 100 psi; Outlet Setting @ 165 psi

Inlet @ 50 psi; Outlet Setting @ 165 psi

Inlet @ 20 psi; Outlet Setting @ 30 psi

200150100

50

0

0

25

50

75

100

125

150

175

OUTLET PRESSURE (PSI)

FLOW (GPM)

OUTLET PRESSURE (PSI)

Page 2

UL Tested March 23, 1999

2" 90G-21

OBSERVED FLOW RATE WHEN INLET PRESSURE

DROPS BELOW OUTLET PRESSURE SET POINT

OUTLET PRESSURE (PSI)

200

175

150

125

100

75

50

25

0

0

50 100 150

FLOW (GPM)

200

250

300

Inlet @ 155 psi; Outlet Setting @ 165 psi

Inlet @ 100 psi; Outlet Setting @ 165 psi

Inlet @ 50 psi; Outlet Setting @ 165 psi

Inlet @ 20 psi; Outlet Setting @ 30 psi

3" 90G-21

175

150

125

100

75

50

25

0

0

100 200 300 400

500 600

OUTLET PRESSURE (PSI)

FLOW (GPM)

Inlet @ 155 psi; Outlet Setting @ 165 psi

Inlet @ 100 psi; Outlet Setting @ 165 psi

Inlet @ 50 psi; Outlet Setting @ 165 psi

Inlet @ 20 psi; Outlet Setting @ 30 psi

Page 3

UL Tested March 23, 1999

4" 90G-21

OBSERVED FLOW RATE WHEN INLET PRESSURE

DROPS BELOW OUTLET PRESSURE SET POINT

Inlet @ 155 psi; Outlet Setting @ 165 psi

Inlet @ 100 psi; Outlet Setting @ 165 psi

Inlet @ 50 psi; Outlet Setting @ 165 psi

Inlet @ 20 psi; Outlet Setting @ 30 psi

200

175

150

125

100

75

50

25

0

0

100 200 300

400

500 600

700

800 900 1000

1100

FLOW (GPM)

OUTLET PRESSURE (PSI)

Inlet @ 155 psi Outlet Setting @ 165 psi

Inlet @ 100 psi Outlet Setting @ 165 psi

Inlet @ 50 psi; Outlet Setting @ 165 psi

Inlet @ 20 psi; Outlet Setting @ 30 psi

1000

750

500250

0

0

25

50

75

100

125

150

175

OUTLET PRESSURE (PSI)

FLOW (GPM)

1250 1500

6" 90G-21

Page 4

UL Tested March 23, 1999

125

150

175

200

8" 90G-21

OBSERVED FLOW RATE AT VARIOUS INLET PRESSURES

AND OUTLET PRESSURE SET POINTS

Inlet @ 200 psi; Outlet Setting @ 165 psi

Inlet @ 150 psi; Outlet Setting @ 120 psi

0

25

50

75

100

0 200 400 600 800 1000 1200 1400 1600

FLOW (GPM)

Inlet @ 100 psi; Outlet Setting @ 90psi

Inlet @ 50 psi; Outlet Setting @ 30 psi

DESCRIPTION

The Cla-Val Model CRD Pressure Reducing Control automatically reduces
a higher inlet pressure to a lower outlet pressure. It is a direct acting,
spring loaded, diaphragm type control that operates hydraulically or pneu­matically. It may be used as a self-contained valve or as a pilot control for
a Cla-Val main valve. It will hold a constant downstream pressure within
very close pressure limits.

OPERATION

The CRD Pressure Reducing Control is normally held open by the force of
the compression spring above the diaphragm; and delivery pressure acts
on the underside of the diaphragm. Flow through the valve responds to
changes in downstream demand to maintain a pressure.

INSTALLATION

The CRD Pressure Reducing Control may be installed in any position.
There is one inlet port and two outlets, for either straight or angle installa­tion. The second outlet port can be used for a gage connection. A flow
arrow is marked on the body casting.

ADJUSTMENT PROCEDURE

The CRD Pressure Reducing Control can be adjusted to provide a deliv­ery pressure range as specified on the nameplate.

Pressure adjustment is made by turning the adjustment screw to vary the
spring pressure on the diaphragm. The greater the compression on the
spring the higher the pressure setting.

1. Turn the adjustment screw in (clockwise) to increase
delivery pressure.

2. Turn the adjustment screw out (counter-clockwise) to
decrease the delivery pressure.

3. When pressure adjustment is completed tighten jam nut on
adjusting screw and replace protective cap.

4. When this control is used, as a pilot control on a
Cla-Val main valve, the adjustment should be made
under flowing conditions. The flow rate is not critical,
but generally should be somewhat lower than normal
in order to provide an inlet pressure several psi higher
than the desired setting

SYMPTOM PROBABLE CAUSE REMEDY

Fails to open
when deliver

pressure lowers

No spring compression Tighten adjusting screw

Spring guide (8) is not in

place

Assemble properly

Yoke dragging on inlet

nozzle

Disassemble and reassemble

properly (refer to Reassembly)

Fails to close
when delivery
pressure rises

Spring compressed solid Back off adjusting screw

Mechanical obstruction

Disassemble and reassemble

properly (refer to Reassembly)

Worn disc

Disassemble remove and

replace disc retainer assembly

Yoke dragging on inlet

nozzle

Disassemble and reassemble

properly (refer to Reassembly)

Leakage from

cover vent hole

Damaged diaphragm Disassemble and replace

Loose diaphragm nut Remove cover and tighten nut

Damaged spring Disassemble and replace

CRD

MAINTENANCE

Disassembly

To disassemble follow the sequence of the item numbers assigned to
parts in the sectional illustration.

Reassembly

Reassembly is the reverse of disassembly. Caution must be taken to
avoid having the yoke (17) drag on the inlet nozzle of the body (18).
Follow this procedure:

1. Place yoke (17) in body and screw the disc retainer
assembly (16) until it bottoms.

2. Install gasket (14) and spring (19) for 2-30 and 2-6.5 psi

range onto plug (13) and fasten into body. Disc retainer
must enter guide hole in plug as it is assembled. Screw
the plug in by hand. Use wrench to tighten only.

3. Place diaphragm (12) diaphragm washer (11) and belleville
washer (20) on yoke. Screw on hex nut (10).

4. Hold the diaphragm so that the screw holes in the
diaphragm and body align. Tighten diaphragm nut with
a wrench. At the final tightening release the diaphragm
and permit it to rotate 5° to 10°. The diaphragm holes
should now be properly aligned with the body holes.

To check for proper alignment proceed as follows:

Rotate diaphragm clockwise and counterclockwise as far as possible.
Diaphragm screw holes should rotate equal distance on either side of
body screw holes ±1/8".

Repeat assembly procedure until diaphragm and yoke are properly
aligned. There must be no contact between yoke and body nozzle
during its normal movement. To simulate this movement hold body
and diaphragm holes aligned. Move yoke to open and closed posi­tions. There must be no evidence of contact or dragging.

5. Install spring (9) with spring guide (8).

6. Install cover (5), adjusting screw (2) and nut (3), then cap (1).

Pressure Reducing Control

The approximate minimum flow rates given in the table are for the main valve
on which the CRD is installed.

Valve Size

Minimum Flow GPM

1 1/4" -3" 4"-8" 10"-16"

15-30 50-200 300-650

MODEL

INSTALLATION / OPERATION / MAINTENANCE

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

N-CRD (R-1/08)

Pressure Reducing Control

*SUGGESTED REPAIR PARTS

CRD

3 1/8

PRESSURE SETTING
ADJUSTING SCREW
(TURN CLOCKWISE
TO INCREASE SETTING

SECTION A-A
OPEN POSTION
FOR HIGH PRESSURE CONTROL

5 3/8

1 13/16

inlet

B

13

14

16

18

17

12

11

10

9

8

5

3

1

2

cover vent

B

3/8" NPT

16

19

Body and Disc
Retainer Detail

for Low Pressure

Control

SECTION B-B

CLOSED POSITION

20

18

17

15

4

A

A

67

When ordering parts specify:

• All nameplate data

• Item Description

• Item number

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

PL-CRD (R-1/08)

PARTS LIST

Size

(inch)

Stock

Number

Adjustment Range

psi Ft of Water
3/8 71943-07A 2 - 6.5 4.5 - 15
3/8 71943-08J 2 - 30 4.5 - 69
3/8 71943-03K 15 - 75 35 - 173
3/8 71943-11C 20 - 105 46 - 242
3/8 71943-04H 30 - 300 69 - 692

Factory Set Pressure

PSI per Turn*

2 - 6.5 set @ 3.5 psi .61

2 - 30 set @ 10 psi 3.0

15 - 75 set @ 20 psi 9.0
20 - 105 set @ 60 psi 12.0
30 - 300 set @ 60 psi 27.0

*Approximate-Final Adjustment should be

with a pressure gauge and with flow.

Item Description Material Part Number List Price

1 Cap PL 67628J

2 Adjusting Screw BRS 7188201D

3 Jam Nut (3/8-16) SS 6780106J

4* Machine Screw (Fil.Hd.) 8 Req'd 303 6757821B

5 Cover BRS C2544K

6 Nameplate Screw SS 67999D

7 Nameplate BRS C0022001G

8 Spring Guide 302 71881H

Spring Guide (20 - 105 psi) 303 205620F

9 Spring (15-75 psi) CHR/VAN 71884B

Spring (2 - 6.5 psi) SS 82575C

Spring (2 - 30 psi) SS 81594E

Spring (20 - 105 psi) 316 20632101E

Spring (30 - 300 psi) CHR/VAN 71885J

10 Hex Nut 303 71883D

11 Diaphragm Washer 302 71891G

12* Diaphragm NBR C6936D

13 Plug, Body BRS V5653A

14* Gasket Fiber 40174F

15 Plug BRS 6766003F

16* Disc Retainer Assy. (15 - 75 psi) BZ/Rub C5256H

Disc Retainer Assy. (2 - 30 psi) BZ/Rub C5255K

Disc Retainer Assy. (20 - 105 psi) BZ/Rub C5256H

Disc Retainer Assy. (30 - 300 psi) BZ/Rub C5256H

17 Yok e VBZ V6951H

18 Body & 1/4" Seat Assy BR/SS 8339702G

19* Bucking Spring (2 - 6.5 psi)(2 - 30psi) 302 V0558G

20 Belleville Washer STL 7055007E

* Repair Kit (No Bucking Spring)

Buna®-N

9170003K

* Repair Kit (with Bucking Spring)

Buna®-N

9170002B

*This drawing is the property of CLA-VAL and same and copies made thereof, if any, shall be returned to it upon demand. Delivery and disclosure hereof are made solely
upon condition that the same shall not be used, copied ore reproduced, nor shall the subject here of be disclosed in any manner to anyone for any purpose, except as
herein authorized, without prior approval of CLA-VAL. Whether or not the equipment or information shown hereon is patented or otherwise protected, full title and copy­rights if any, in and to this drawing and/or information delivered or submitted are fully reserved by CLA-VAL.

Dwg#47117

Regulator Spring Color Coding Chart

THE FOLLOWING CONTROL & SPRING P/N#'S WERE REMOVED, 32656B, 31554K, 44591G, V65695B, & V5695B.
ADDED CRL-13, CRL-5A, CRA, CRA-10A, CHANGED SPRING RANGES TO MATCH CURRENT CONTROLS.

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

PL-47117 AF (R-1/08)

PARTS LIST

WIRE SIZE SPRING NUMBER COLOR WIRE MATERIAL CATALOG NUMBER PSI RANGE *PSI PER TURN

.080 DIA. C0492D BLUE S.S.

CDB-7

CRL-5A

0-7
0-7

.75
.75

.018 DIA. 82575C -- S.S.

CRD

CRD-10A

1.9-6.5

1.9-6.5

.61
.49

.116 DIA. 81594E -- S.S.

CRD

CRD-10A

2-30
2-30

3.0

2.4

.120 DIA. V5654J GREEN CHR VAN

CRL-5A

CRD

5-25

10-40

4.0

4.0

.162 DIA. 32447F NATURAL S.S.

CDB-7
CRL-5A
CRL-13

10-60
10-60
10-60

12.0

12.0

12.0

.162 DIA. V5695B YELLOW MUSIC WIRE

CDB-7
CRL-5A
CRL-13

20-80
20-80
20-80

14.5

14.5

14.5

.207 DIA. C1124B CAD PLT MUSIC WIRE

CDB-7
CRL-13
CRL-5A

50-150
50-150
50-150

29.5

29.5

29.5

.225 DIA. V6515A RED MUSIC WIRE

CDB-7
CRL-13
CRL-5A

65-180
65-180
65-180

44.0

44.0

44.0

.115 X .218 71884B RED CHR VAN

CRL

CRD

CRD-10A

0-75
15-75
15-75

8.5

9.0

7.2

.118 X .225 71885J GREEN CHR VAN

CRL

CRD

CRD-10A

20-200
30-300
30-300

28.0

27.0

22.4

.225 X .295 1630201A CAD PLT CHR VAN

CRL

CRL-5A

100-300
100-300

18.00

18.00

.440 X .219 48211H CAD PLT STEEL

CRA-18
CRD-22
CRL-4A

200-450
200-450
100-450

17.0

17.0

17.0

.187 20632101E BLACK 316 SST

CRD

CRL

20-105
20-105

13.0

13.0

WIRE SIZE SPRING NUMBER COLOR WIRE MATERIAL CATALOG NUMBER PSI RANGE *FEET PER TURN

.080 DIA. C0492D BLUE S.S.

CRA

CRD-2

4.5-15

4.5-15

.82
.82

.375 DIA.

87719B
1 SPRING
2 SPRING
3 SPRING
4 SPRING
5 SPRING

EPOXY

COATED

CHROME SILICON CDS-5

5-40

30-80

70-120
110-120
150-200

1.0

2.0

3.0

4.0

5.0

.072 DIA. V5097A -- 302SS CVC 1-17 .7

.375 DIA.

2933502H
1 SPRING
2 SPRING
3 SPRING
4 SPRING
5 SPRING

EPOXY

COATED

CHROME SILICON CDS-6A

5-40

30-80

70-120
110-160
150-200

.75

1.50

2.20

3.00

3.70

*THESE FIGURES ARE ONLY APPROXIMATE. FINAL ADJUSTMENTS SHOULD BE MADE WITH A PRESSURE GAGE.

The strainer is designed for use in conjunction with a Cla-Val
Main Valve, but can be installed in any piping system where
there is a moving fluid stream to keep it clean. When it is used
with the Cla-Val Valve, it is threaded into the upstream body port
provided for it on the side of the valve. It projects through the
side of the Main Valve into the flow stream. All liquid shunted to
the pilot control system and to the cover chamber of the Main
Valve passes through the X46 Flow Clean Strainer.

C

Male

Pipe

SAE

H

D

E

B

I

G

Male

Pipe

B

I

Width Across Flats

Female

Pipe

A

D

E

F

• Self Scrubbing Cleaning Action

• Straight Type or Angle Type

The Cla-Val Model X46 Strainer is designed to prevent passage of
foreign particles larger than .015". It is especially effective against
such contaminant as algae, mud, scale, wood pulp, moss, and root
fibers. There is a model for every Cla-Val. valve.

The X46 Flow Clean strainer operates on a velocity principle utiliz­ing the circular "air foil" section to make it self cleaning. Impingement
of particles is on the "leading edge" only. The low pressure area on
the downstream side of the screen prevents foreign particles from
clogging the screen. There is also a scouring action, due to eddy
currents, which keeps most of the screen area clean.

Dimensions

(In Inches)

INSTALLATION

X46 Angle Type B (In Inches)

B

(NPT)C(SAE)

DEH I

1/8 1/4 1-3/8 5/8 7/8 1/4

1/4 1/4 1-3/4 3/4 1 3/8

3/8 1/4 2 7/8 1 1/2

3/8 3/8 1-7/8 7/8 1 1/2

1/2 3/8 2-3/8 1 1-1/4 5/8

X46A Straight

X46B Angle

X46A Straight Type A (In Inches)

A B D E F G I

1/8 1/8 1-3/4 3/4 1/2 1/2 1/4

1/4 1/4 2-1/4 1 3/4 3/4 3/8

3/8 3/8 2-1/2 1 7/8 7/8 1/2

3/8 1/2 2-1/2 1-1/4 1/2 7/8 3/4

1/2 1/2 3 1-1/4 1 1-1/8 3/4

3/8 3/4 3-3/8 2 1/2 1 7/8

3/4 3/4 4 2 1 1-1/2 7/8

3/8 1 4-1/4 2-3/4 1/2 1-3/8 7/8

1 1 4-1/2 2-3/4 1-1/4 1-3/4 7/8

1/2 1 4-1/4 2-3/4 1/2 1-3/8 7/8

Flow Clean Strainer

X46

INSPECTION

Inspect internal and external threads for damage or evidence
of cross-threading. Check inner and outer screens for clogging,
embedded foreign particles, breaks, cracks, corrosion, fatigue,
and other signs of damage.

CLEANING

After inspection, cleaning of the X46 can begin. Water service usually will produce
mineral or lime deposits on metal parts in contact with water. These deposits can
be cleaned by dipping X46 in a 5-percent muriatic acid solution just long enough
for deposit to dissolve. This will remove most of the common types of deposits.
Caution: use extreme care when handling acid. If the deposit is not removed
by acid, then a fine grit (400) wet or dry sandpaper can be used with water.
Rinse parts in water before handling. An appropriate solvent can clean parts used
in fueling service. Dry with compressed air or a clean, lint-free cloth.
Protect from damage and dust until reassembled.

REPLACEMENT

If there is any sign of damage, or if there is the slightest doubt that the Model X46
Flow Clean Strainer may not afford completely satisfactory operation, replace it.
Use Inspection steps as a guide. Neither inner screen, outer screen, nor housing is
furnished as a replacement part. Replace Model X46 Flow Clean Strainer as a com­plete unit.

When ordering replacement Flow-Clean Strainers, it is important to determine pipe
size of the tapped hole into which the strainer will be inserted (refer to column A or
F), and the size of the external connection (refer to column B or G).

When Ordering,
Please Specify:

• Catalog Number X46

• Straight Type or Angle Type

• Size Inserted Into and Size Connection

• Materials

DISASSEMBLY

Do not attempt to remove the screens from the strainer housing.

MODEL

INSTALLATION / OPERATION / MAINTENANCE

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

N-X46 (R-1/08)

(NPT) (NPT)

X46B

X46A

How to Order

How To Order

There are many valves and con­trols manufactured by Cla-Val. that
are not listed due to the sheer vol­ume. For information not listed,
please contact your local Cla-Val
representative.

Specify when
Ordering

• Model Number

• Adjustment Range
(As Applicable)

• Valve Size

• Optional Features

• Pressure Class

Unless Otherwise
Specified

• X43 “Y” Strainer is
included.

• CK2 Isolation Valves is
included in price on 6" and
larger valve sizes.

Limited Warranty

Automatic valves and controls as manufactured by Cla­Val are warranted for one year from date of shipment
against manufacturing defects in material and workman­ship which develop in the service for which they are
designed, provided the products are installed and used in
accordance with all applicable instructions and limita­tions issued by Cla-Val. Electronic components manu­factured by Cla-Val are warranted for one year from the
date of shipment.

We will repair or replace defective material, free of
charge, which is returned to our factory, transportation
charges prepaid, provided that, after inspection, the mate­rial is found to have been defective at time of shipment.
This warranty is expressly conditioned on the purchaser’s
giving Cla-Val immediate written notice upon discovery of
the defect.

Components used by Cla-Val but manufactured by others,
are warranted only to the extent of that manufacturer’s
guarantee.

This warranty shall not apply if the product has been
altered or repaired by others, and Cla-Val. shall make no
allowance or credit for such repairs or alterations unless
authorized in writing by Cla-Val.

90-21 UL

Product Identification

Proper Identification

For ordering repair kits, replacement parts, or for
inquiries concerning valve operation it is important to
properly identify Cla-Val products already in service.
Include all nameplate data with your inquiry. Pertinent
product data includes valve function, size, material,
pressure rating, end details, type of pilot controls used
and control adjustment ranges.

Identification Plate

For product identification, cast in body markings are
supplemented by the identification plate illustrated on
this page. The plate is mounted in the most practical
position. It is extremely important that this identifi-

cation plate is not painted over, removed, or in any
other way rendered illegible.

Terms Of Sale

ACCEPTANCE OF ORDERS

All orders are subject to acceptance by our main office at
Newport Beach, California.

CREDIT TERMS

Credit terms are net thirty (30) days from date of invoice.

PURCHASE ORDER FORMS

Orders submitted on customer’s own purchase order forms
will be accepted only with the express understanding that no
statements, clauses, or conditions contained in said order
form will be binding on the Seller if they in any way modify
the Seller’s own terms and conditions of sales.

PRODUCT CHANGES

The right is reserved to make changes in pattern, design or
materials when deemed necessary, without prior notice.

PRICES

All prices are F.O.B. Newport Beach, California, unless
expressly stated otherwise on our acknowledgement of the
order. Prices are subject to change without notice. The
prices at which any order is accepted are subject to adjust­ment to the Seller’s price in effect at the time of shipment.
Prices do not include sales, excise, municipal, state or any
other Government taxes. Minimum order charge $75.00.

RESPONSIBILITY

We will not be responsible for delays resulting from strikes,
accidents, negligence of carriers, or other causes beyond
our control. Also, we will not be liable for any unauthorized
product alterations or charges accruing there from.

Disclaimer Of Warranties And

Limitations Of Liability

The foregoing warranty is exclusive and in lieu of all other
warranties and representations, whether expressed,
implied, oral or written, including but not limited to any
implied warranties or merchantability or fitness for a partic­ular purpose. All such other warranties and representations
are hereby cancelled.

Cla-Val shall not be liable for any incidental or consequential
loss, damage or expense arising directly or indirectly from
the use of the product. Cla-Val shall not be liable for any
damages or charges for labor or expense in making repairs
or adjustments to the product. Cla-Val shall not be liable for
any damages or charges sustained in the adaptation or use
of its engineering data and services. No representative of
Cla-Val may change any of the foregoing or assume any
additional liability or responsibility in connection with the
product. The liability of Cla-Val is limited to material replace­ments F.O.B. Newport Beach, California.

Risk

All goods are shipped at the risk of the purchaser after they have been
delivered by us to the carrier. Claims for error, shortages, etc., must be
made upon receipt of goods.

EXPORT SHIPMENTS

Export shipments are subject to an additional charge for export packing.

RETURNED GOODS

1. Customers must obtain written approval from Cla-Val prior to return­ing any material.

2. Cla-Val reserves the right to refuse the return of any products.

3. Products more than six (6) months old cannot be returned for cred­it.

4. Specially produced, non-standard models cannot be returned for
credit.

5. Rubber goods cannot be returned for credit, unless as part of an
unopened repair kit which is less than six months old.

6. Goods authorized for return are subject to a 35% ($75 minimum)
restocking charge and a service charge for inspection, recondition­ing, replacement of rubber parts, retesting and repackaging as
required.

7. Authorized returned goods must be packaged and shipped prepaid to
Cla-Val., 1701 Placentia Avenue, Costa Mesa, California 92627-

4475.

PO Box 1325 Newport Beach CA 92659-0325

Phone: [phone] Fax: [phone]

C

LA-VAL

CLA-VAL CANADA CLA-VAL EUROPE

4687 Christie Drive
Beamsville, Ontario
Canada LOR 1B4
Phone: [phone]
Fax: [phone]

Chemin dés Mesanges 1
CH-1032 Romanel/
Lausanne, Switzerland
Phone: [phone]
Fax: [phone]

©COPYRIGHT CLA-VAL 2008 Printed in USA

Specifications subject to change without notice.

www.cla-val.com

E-Product I.D. 90-21 UL (R-1/08)

Represented By:

Complete Replacement Diaphragm Assemblies for 100-01 and 100-20 Hytrol Main Valves

For: Hytrol Main Valves with Ductile Iron, Bronze Trim Materials—125/150 Pressure Class Only.
FACTORY ASSEMBLED
Includes: Stem, Disc Guide, Disc, Disc Retainer, Spacer Washers, Diaphragm, Diaphragm Washer
and Stem Nut.

3/8"

1/2" - 3/4"

1"

1 1/4"-1 1/2"

2"

2 1/2"

3"
4"

(Also 81-01 )
(Also 81-01 )

N/A
N/A
N/A
N/A
N/A

N/A
C2524B
C2525J

6"

8"
10"
12"
14"
16"
20"
24"

40456G
45276D

81752J
85533J

89067D

89068B

N/A
N/A

33273E
40456G
45276D

81752J

N/A

85533J
89068B
89068B

Valve

Size

Valve

Size

49097K
C2518D
C2520K

C2522 F

C2524B
C2523D

C2525J

33273E

100-01 100-20

Diaphragm Assembly

Stock Number

100-01 100-20

Diaphragm Assembly

Stock Number

3/8"

1/2" - 3/4"

1"

1 1/4" - 1 1/2"

2"

2 1/2"

3"
4"
6"

8"
10"
12"
14"
16"
20"
24"

(Also 81-01 )
(Also 81-01 )

N/A
N/A
N/A
N/A
N/A

N/A
9169805A
9169812G
9169813E
9169815K
9817901D
9817902B

N/A
9817903K
9817905E
9817905E

3/8"

1/2" - 3/4"

1"

1 1/4” - 1 1/2"

2"

2 1/2"

3"
4"
6"
8"

9169806J
9169807G
9169808E
9169809C
9169810A

9169817F
9169818D
9169819B
9169820K
9169834A

N/A
N/A
N/A
N/A
N/A
N/A

9169810A
9169818D
9169819B
9169820K

Valve

Size

Valve

Size

9169801K
9169802H
9169803F
9169804D
9169805A
9169811J
9169812G
9169813E
9169815K
9817901D
9817902B
9817903K
9817904H
9817905E

N/A

9817906C

100-01 100-20

Repair Kit

Stock Number

100-01 100-20

Repair Kit

Stock Number

Repair Kits for 100-01/100-20 Hytrol Valves

For: Hytrol Main Valves—125/150 Pressure Class Only.
Includes: Diaphragm, Disc (or Disc Assembly) and spare Spacer Washers.

(Also 81-01 )
(Also 81-01 )

REPAIR KITS

When ordering, please give complete nameplate data of the valve and/or control being repaired.

MINIMUM ORDER CHARGE APPLIES.

Buna-N®Standard Material

Viton (For KB Valves)

MODEL

INSTALLATION / OPERATION / MAINTENANCE

Repair Kits for 100-04/100-23 Hy-Check Main Valves

For: Hy-Check Main Valves—125/150 Pressure Class Only
Includes: Diaphragm, Disc and O-Rings and full set of spare Spacer Washers.

Larger Sizes: Consult Factory.

Repair Kits for 100-02/100-21 Powertrol and 100-03/100-22 Powercheck Main Valves

For: Powertrol and Powercheck Main Valves—125/150 Pressure Class Only
Includes: Diaphragm, Disc (or Disc Assembly) and O-rings and full set of spare Spacer Washers.

Repair Kits for Pilot Control Valves (In Standard Materials Only)

Includes: Diaphragm, Disc (or Disc Assembly), O-Rings, Gaskets or spare Screws as appropriate.

Repair Assemblies (In Standard Materials Only)

CLA-VAL

Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice.

P.O. Box 1325 • Newport Beach, CA 92659-0325 • Phone: [phone] • Fax: [phone] • E-mail: [e-mail] • Website cla-val.com

©

N-RK (R-4/08)

Valve

Size

Kit Stock Number

100-02

Valve

Size

Kit Stock Number

100-02 & 100-03 100-21 & 100-22

3

⁄8”

9169901H

2

1

⁄2”

9169910J N/A

1

⁄2” &3⁄4”

9169902F

3”

9169911G 9169905J

1” 9169903D

4”

9169912E 9169911G

1

1

⁄4” &11⁄2”

9169904B

6”

9169913C 9169912E

2” 9169905J

8”

99116G 9169913C

10”

9169939H 99116G

12"

9169937B 9169939H

Valve

Size

Kit Stock Number

Valve

Size

Kit Stock Number

100-04 100-23 100-04 100-23

4” 20210901B N/A 12” 20210905H 20210904J
6” 20210902A 20210901B 14” 20210906G N/A
8” 20210903K 20210902A 16” 20210907F 20210905H

10” 20210904J 20210903K 20” N/A 20210907F

24” N/A 20210907F

BUNA-N

®

(Standard Material)

VITON (For KB Controls)

Pilot

Control

Kit

Stock

Number

Pilot

Control

Kit

Stock

Number

Pilot

Control

Kit

Stock

Number
CDB 9170006C CRM-7 1263901K CDB-KB 9170012A
CDB-3D 9170023H CFM-7A 1263901K CRA-KB N/A
CDB-3I 9170024F CFM-9 12223E

CRD-KB (w/bucking spring)

9170008J

CDB-7 9170017K

CRA (w/bucking spring)

9170001D CRL-KB 9170013J

CDH-2 18225D

CRD (w/bucking spring)

9170002B CDHS-2BKB 9170010E

CDHS-2 44607A

CRD (no bucking spring)

9170003K CDHS-2FKB 9170011C
CDHS-2B 9170004H CRD-18 20275401K CDHS-18KB (no bucking spring) 9170009G
CDHS-2F 9170005E CRD-22 98923G

102C-KB

1726202D
CDHS-3C-A2 24657K CRL (55F, 55L) 9170007A
CDHS-8A 2666901A CRL-4A 43413E
CDHS-18 9170003K CRL-5 (55B) 65755B
CDS-4 9170014G CRL-5A (55G) 20666E
CDS-5 14200A CRL-18 20309801C
CDS-6 20119301A CV 9170019F

Buna-N

®

CDS-6A 20349401C X105L (O-ring) 00951E
CFCM-M1 1222301C 102B-1 1502201F CRD Disc Ret. (Solid) C5256H
CFM-2 12223E 102C-2 172601F CRD Disc Ret. (Spring) C5255K

102C-3 172601F

Control Description Stock Number

CF1-C1 Pilot Assembly Only 89541H
CF1-Cl Complete Float Control less Ball and Rod 89016A
CFC2-C1 Disc, Distributor and Seals 2674701E
CSM 11-A2-2 Mechanical Parts Assembly 97544B
CSM 11-A2-2 Pilot Assembly Only 18053K
33A 1" Complete Internal Assembly and Seal 2036030B
33A 2" Complete Internal Assembly and Seal 2040830J

When ordering, please give complete nameplate data of the valve and/or control being repaired. MINIMUM ORDER CHARGE APPLIES

Larger Sizes: Consult Factory.