Cla-val 40-01/640-01 Quick Manual Manuel d'utilisateur télécharger pdf

INTRODUCTION

The Cla-Val 40-01/640-01 is an automatic valve designed to limit

the maximum flow rate regardless of changing line pressure.

It is hydraulically operated, pilot-controlled, diaphragm type

globe or angle valve. The pilot control is actuated by the

differential pressure produced across an orifice plate restriction

installed downstream of the valve. Accurate control is insured as

very small changes in the controlling differential produce

immediate corrective action of the main valve. Rate of flow is

adjustable by varying the spring loading on the pilot control.

INSTALLATION

1. Allow sufficient room around the valve to make adjustments

and for disassembly.

2. It is recommended that either gate or block valves be installed

on both ends of the Cla-Val Valve to facilitate isolating the valve

for preventive maintenance.

NOTE: BEFORE THE VALVE IS INSTALLED, PIPE LINES

SHOULD BE FLUSHED OF ALL CHIPS, SCALE, AND FOREIGN

MATTER.

3. Place valve in line with flow through the valve in the direction

indicated on the inlet plate 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, be thorough in

checking and inspecting for proper installation and makeup.

4. For best control, it is recommended that the orifice plate

restriction be installed 1 to 5 pipe diameters downstream of the

main valve. The flow arrows should be pointing to the down-

stream side of the system.

5. A sensing line, supplied by other than Cla-Val, must be

connected between the orifice plate holder (4) and the

Differential Control (3). See dotted lines on schematic drawing.

6. Cla-Val Valves operate with maximum efficiency when mount-

ed in horizontal piping with the cover UP: however, other posi-

tions are acceptable. Due to size and weight of cover and inter-

nal components of six inch and larger valves, 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.

OPERATING 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 X101

Valve Position Indicator may be installed in the center cover port

to provide visual indication of the valve diaphragm assembly

position during startup.

CAUTION: During startup and test procedures a large volume of

water may be discharged downstream. Check that the down-

stream venting is adequate to prevent damage to personnel and

equipment. All adjustments in pressure should be made slowly.

If the main valve closes too fast it may cause surging in

upstream piping.

2. With the downstream block valve closed, slowly open

upstream block valve. If isolation valves (B) are installed in the

pilot system, open these valves.(see schematic)

3. Carefully loosen the plug at top of cover assembly. If an

indicator (X101) is installed, loosen the bleed valve at top of

indicator. Bleed air from cover and tighten plug or bleed valve.

4. Carefully loosen tubing fittings at highest points and bleed air

from system. Retighten fittings.

NOTE: Be sure the sensing line, (dotted line shown on schemat-

ic) which connects the orifice plate holder (4) to the CDHS-18

Control (3) is installed. The 40-01/640-01 Rate of Flow Control

Valve will not function unless this sensing line is installed. Be sure

to bleed air from this sensing line at the CDHS-18 Control fitting.

5. Slowly open downstream block valve and adjust the CDHS-18

Control for required flow rate. Turn the adjustment screw clock-

wise to increase flow rate and counterclockwise to decrease flow

rate. The adjustment screw should be turned slowly. A good pro-

cedure is to make one adjustment turn with a pause to let the

system stabilize.

MAINTENANCE AND INSPECTION

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 operation of the valve assembly.

Minimum of once per year.

2. Repair and maintenance procedures of the Hytrol Main Valve

and control components are included in a more detailed IOM

manual. It can be downloaded from our web site (www.cla-

val.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.

40-01/640-01

Rate of Flow Control Valve

MODEL

INSTALLATION / OPERATION / MAINTENANCE

SYMPTOM POSSIBLE CAUSE

Orifice plate assembly and/or

orifice sensing line clogged

Remove line and

clean orifice port

Clean or replace line

Readjust control

Adjustment below desired

set point

Control line shutoff valve to

cover or main outlet closed

Open shutoff valve

Adjustment above desired set

point

Readjust control

Pilot control diaphragm nut

loose or diaphragm leaks

(damaged)

Disassemble tighten

nut or replace

diaphragm

Clogged restriction assembly Remove and clean

or replace

Control line shutoff valve from

inlet to restriction closed

Open shutoff valve

and readjust

CV Flow control closed or

clogged

Disassembled and

clean

Pilot control disc worn or

nicked

Remove disc retainer

assembly and replace

Pilot valve stuck closed

Mineral deposits or foreign

matter under disc retainer

assembly

Remove plug and disc

retainer assembly

clean or replace

Main valve stuck closed

Mineral buildup on stem

Stem damaged

Diaphragm leaks

Disassemble main

valve clean parts

and/or replace

damaged parts

SOLUTIONS

Main valve

won’t open

Main valve

won’t close

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40-01/640-01 1
40-01/640-01 SCHEMATIC 2

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Page 1 - 40-01/640-01

INTRODUCTIONThe Cla-Val 40-01/640-01 is an automatic valve designed to limitthe maximum flow rate regardless of changing line pressure.It is hydraulic

Page 2 - 40-01/640-01 SCHEMATIC

CLA-VAL Copyright Cla-Val 2008 Printed in USA Specifications subject to change without notice. P.O. Box 1325 • Newport Beach, CA 92659-03

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Cla-val 40-01/640-01 Quick Manual Manuel d'utilisateur

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