Cla-Val 93-01-693-01 Quick Manual

INSTALLATION / OPERATION / MAINTENANCE

Pressure Reducing & Solenoid Shutoff Valve

INTRODUCTION

The Cla-Val Model 93-01/693-01 is an automatic valve designed to
reduce a higher inlet pressure to a steady lower downstream pressure
regardless of changing flow rate and/or varying inlet pressure. It is a
hydraulically operated, pilot controlled, diaphragm type globe or angle
valve.
When downstream pressure exceeds the pressure setting of the con­trol pilot the main valve and pilot valve close drip tight. The control sys­tem is very sen sitive to slight pressure changes and immediately con­trols the main valve to maintain the desired downstream pressure.
Pressure setting adjustment is made with a single adjusting screw that
has a protective cap to discourage tampering. A solenoid control is pro­vided to in tercept the operation of the pressure reducing control to
close or open the main valve.

INSTALLATION

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

2. It is recommended that either a gate or block valve be installed
upstream and downstream of the 93-01/693-01 Valve to facilitate iso­lating the valve for maintenance.

NOTE: BEFORE THE VALVE IS INSTALLED, PIPE LINES SHOULD
BE FLUSHED OF ALL CHIPS, SCALE AND FOREIGN MATTER.

3. Place the valve assembly in the line with flow through the valve in
the direction indicated on the inlet nameplate or by flow arrows. Check
all fittings and hardware for proper makeup and that no apparent dam­age is evident. Be sure main valve cover nuts/bolts are tight.
Pressure in some applications can be very high so be thorough in
checking and inspecting for proper installation and makeup.

4. 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 valves and larger, installation with the cover up is advisable. This
makes periodic inspection of internal parts readily accessible.

5. Caution must be taken in the installation of this valve to insure

that galvanic and/or electrolytic action does not take place. The
proper use of dielectric fittings and gaskets are required in all sys­tems using dissimilar metals.

6. Comply with local and national electrical codes when wiring the
Solenoid Control (5).

OPERATION AND START-UP

1. Prior to pressurizing the valve assembly make sure the necessary
gauges to measure pressure in the system are installed as required by
the system engineer. A Cla-Val Model X101Valve Position Indicator may
be installed in the center cover port to provide a visual indication
of the valve stem during start-up.
CAUTION: During start-up and test procedures a large volume
of water m ay be d ischarged downstream. Check that the downstream
venting is adequate to prevent damage to personnel and equipment. All

adjustments in pressure should be made slowly while under flowing
conditions. If the main valve closes too fast it may cause surging in

upstream piping.

2. If isolation valves (B) are installed in pilot system, open these valves
(see schematic).

NERGIZED TO OPEN

SOLENOID CONTROL (5)

POSITION

ENERGIZED

DE-ENERGIZED

PORT FLOW

1 TO 2

TO 3

1

E

CLA-VAL 93-01

UXILIARY (4) AND

A

MAIN VALVE (1)

PEN RELIEVES

O

COVER PRESSURE

CLOSED APPLIES

COVER PRESSURE

DE-ENERGIZED TO OPEN

CLA-VAL 93-01

AUXILIARY (4) AND

MAIN VALVE (1)

C

LOSED APPLIES

COVER PRESSURE

OPEN RELIEVES

COVER PRESSURE

MODEL

93-01/693-01

3. The three-way Solenoid Control applies or relieves pressure in the
cover chamber of the Auxiliary Hytrol Valve (4) in the control piping.
The following action takes place:

4. When the Solenoid allows the main valve to open, the CRD
Pressure Reducing Controls (3) is in command of Hytrol Main Valve.

5. Open the upstream gate or block valve just slightly to allow the valve
assembly and control system to fill with liquid.

6. Carefully loosen tube fittings at highest points and bleed air from the
system. Loosen the vent valve at the top of the main valve cover. If an
X-101 Valve Position Indicator is installed, carefully loosen the vent
valve at top of the Indicator. Bleed air from the cover and tighten plug
or bleed screw. Tighten tube fittings.

7. Open fully the upstream gate or block valve car efully.

8. Slowly open the downstream gate or block valve. Flow should occur
and discharge pressure should increase to the set point of the CRD
Control and remain constant.

9. Adjust the CRD Control to desired outlet pressure. To change pres­sure setting, turn the adjusting screw clockwise to increase pressure,
counter-clockwise to decrease pressure. There should be flow through
valve during outlet pressure adjustments. When the desired setting
has been made, tighten jam nut and replace cover.

10.To check the operation of the valve, open and close the downstream
gate valve. The downstream pressure should remain constant.

11. If opening and closing speed controls (C or S) are installed in the
valve pilot system, fine tune the opening and closing speed of the main
valve while performing step 10. Turn the adjustment stem on the clos­ing speed control “C” clockwise to make the main valve close slower.
Turn the adjusting stem on the opening speed control “S” clockwise to
make the main valve open slower. When adjustments have been com­pleted, tighten the jam nuts.

12. To check the operation of the solenoid shutoff feature, a lternatel y
energize and de-energize the solenoid to open and close the main
valve. The main valve should alternately close drip tight and open to
set point of the CRD. The optional manual operator on solenoids over­rides operation by shifting it to the energized position when small red
knob is fully turned clockwise. By turning small red knob counter­clockwise fully normal solenoid operation is restored.

MAINTENANCE

1. Cla-Val Valves and Controls require 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 assembly. Minimum of once per year

2. 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.

3. When ordering parts always refer to the catalog number and stock

number on the valve nameplate.

CRD 93-01/693-01 SCHEMATIC

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)

5

CS3

2

3

2

1

H

SOLENOID DRAIN
TO ATMOSPHERE

3.

X140-1

Security Cap

Option

D1

Y

B

BASIC COMPONENTS

1 100-01 Hytrol (Main Valve)

100-20 600 Series Hytrol (Main Valve)
2 X58C Restriction Tube Fitting
3 CRD Pressure Reducing Control
4 100-01 Hytrol - Rev. Flow
5 CS3 Solenoid Control

S

INLET

X58C

2.

CRD

3.

CS3

5.

X46A

A.

CK2

B.

CV

C.

B

A

Cover Bolt

*

BODY

(Globe

4

C

D2

1

OPTIONAL FEATURES

A X46A Flow Clean Strainer
B CK2 (Isolation Valves)
C CV Flow Control - Closing
D Check Valves with Isolation Valve
H Solenoid Drain to Atmosphere
S Opening Speed Control
Y X43 “Y” Strainer

HYTROL MAIN VALVE

COVER

6" and Smaller

SPRING

DIAPHRAGM

*DISC

DISC GUIDE

SEAT

or

Angle)

D3

OUTLET

1.

3

B

Spring Color

Stainless Steel

Red

Green

psi change per turn*

REMEDY

Check inlet pressure Disassemble,
clean and polish stem, disc guide,
replace defective parts

1. Tighten adjusting screw

2. Disassemble and replace

3. Assemble properly

4. Assemble properly
Disassemble, clean and polish s tem,
Replace worn parts
Disassemble main valve
remove foreign matter, clean or
replace damaged parts
Remove and clean or replace
units
Open isolation valves

1. Back off adjusting screw

2. Disassemble and remove
obstruction

3. Disassemble and replace

4. Assemble properly

5. Disassemble, replace diaphragm
and/or tighten nut

6. Remove and replace

Loosen top cover plug and/or
tubing fining and bleed air
Assemble properly

Check outlet pressure require­ments and compare existing spring
with chart

Check voltage across coil leads
must be minimum of 85% of
nameplate rating
Check for open circuit coil
Replace coil

PIPE PLUG

COVER BEARING

STEM NUT

DIAPHRAGM WASHER

DISC RETAINER

*

SPACER WASHERS

STEM

Seat Screw

8" and Larger

SEAT O-RING

*Repair Parts

HEX NUT

8" and Larger

PIPE PLUG

STUD

8" and Larger

PIPE PLUG

CRD adjust range (psi)

2 - 30

15 - 75

30 - 300

* approximate. Use gauge at valve outlet to set

SYMPTOM

Main Valve
Fails to
Open

Main Valve
Fails to
Close

Fails to
Regulate

Solenoid
Valve
will not
Operate

PROBABLE CAUSE

No pressure at valve inlet
Main valve diaphragm assembly inoperative

Pressure Reducing Control (CRD) not opening:

1. No spring compression

2. Damaged spring

3. Spring guide not in place

4. Yoke dragging on inlet nozzle
Flow Control (CV) disc inoperative,
corrosion or excessive scale buildup on stem
Foreign matter between disc and seat or worn
disc. Scale on stem
Diaphragm damaged
X46 Flow Clean Strainer plugged, or
X43 “Y” Strainer plugged
CK2 (isolation valves) closed
Pressure Reducing Control (CRD)
remains open:

1. High spring compression

2. Damaged spring

3. Spring guide not in place

4. Yoke dragging on inlet nozzle

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

6. Worn or damaged disc retainer assembly

Air in main valve cover and/or tubing

Pressure Reducing Control (CRD)
yoke dragging on inlet nozzle

Pressure Reducing Control (CRD) spring
not in correct range to control

SOLENOID SYMPTOMS

Solenoid voltage

Burned out solenoid coil

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

N-93-01/693-01 (R-9/08)

CLA-VAL

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

©

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

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