Cla-Val 124-02/624-02 Quick Manual - Manual

INSTALLATION / OPERATION / MAINTENANCE
INTRODUCTION
The Cla-Val 124-02/624-02 is an automatic valve designed to open
wide when liquid level reaches a predetermined low point and to
shut drip tight when a predetermined high point is reached. It is a
hydraulically operated, pilot controlled, diaphragm type globe or
angle valve. The Float Valve is actuated by a float ball to limit the
high and low liquid levels in the tank or reservoir by closing or
opening the main valve. High and low liquid levels are adjustable.
The float control can be remotely located only if the flowing line
pressure at the valve inlet (in psi) is equal to or greater than the
elevation (in feet) from the main valve to the float pilot control.
INSTALLATION
1. Allow sufficient room around the valve assembly to make adjust-
ments and maintenance.
NOTE: before the valve is installed, the pipeline should be
flushed of all chips, scale and foreign matter.
2. It is recommended that a gate or line block valves as well as a
Cla-Val X43H line strainer be installed upstream of the 124-
02/624-02 valve assembly to facilitate isolating the valve for pre-
ventive maintenance. If the discharge from the Float Valve is to
atmosphere, an outlet shutoff valve may not be required.
3. Place the valve assembly in the line with flow through the valve
in the direction of flow arrows or by the inlet nameplate. Check all
fittings and hardware for proper makeup and that no apparent
damage is evident.
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 sys-
tems using dissimilar metals.
6. When the valve is installed over water in the tank or reservoir
mount the valve to position the float rod and ball assembly (item 3 CF1-
C1) vertically down from the valve.
7. If the surface of the water in the tank is subject to waves by wind
or by valve discharge, a stilling well must be installed around
the float ball assembly. 8'' I.D. PVC pipe is suggested.
8. INITIAL ADJUSTMENT. See CF1-C1 on reverse side for proper
assembly of the float rod, ball and stop collars and threading into
the Link Assembly. Temporarily remove float. Adjust counterweight
on the rod to balance the weight of the link assembly and float rod
assembly, less the float. Replace float.
9. Move float rod to the "up" position. Adjust the upper stop collar
on the float rod assembly approximately three inches above the
high water level desired in the tank. Move float rod to “down”
position. Adjust the lower stop collar on the float rod assembly
approximately three inches below the desired low water level. Tighten
stop collar screws on the CF1-C1.
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 X101 Valve Position
Indicator may be installed in the center cover port to provide visual
indication of the valve stem position during start-up.
CAUTION: During start-up and test procedures a large volume of
water may be discharged downstream. Check that the downstream
venting is adequate to prevent damage to personnel and equipment.
If the main valve closes too fast it may cause surging in upstream
piping.
2. If isolation valves (B) are installed in the pilot system, open
these valves (see 124-02 schematic).
3. Slowly open the upstream block valve.
4. While the tank is filling, the float rod and link assembly (CF1-C1
item 19) can be moved slowly to the up position to manually close
the main valve. This operation tests the closure of the Float Valve
and also will purge air from the control lines and cover chamber.
Carefully loosen tube fittings at highest points and bleed air from
system. Carefully loosen the plug at top of main valve cover. If an
indicator is installed, carefully loosen the vent at top of indicator.
Bleed air from cover and tighten plug. Tighten tube fittings.
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 the 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.
Float Valve
SYMPTOM PROBABLE CAUSE
Replace diaphragm Continuous
drain from
control dis-
charge port
Continuous
flow from con-
trol discharge
Main valve
fails to close
Main valve
fails to open
Damaged auxiliary valve
diaphragm (3B)
Loose diaphragm assembly
auxiliary valve (3B)
Damaged control (2)
Damaged control (2)
Damaged auxiliary valve
diaphragm (3A)
Inlet gate or block valve closed.
Loose diaphragm assembly
auxiliary valve (3A)
Lack of pressure at valve inlet
(install gauge at valve inlet to
check for this problem)
Note if pressure at valve inlet
is above 5 psi
isolation valve in control tub-
ing closed
Float and float rod fails to
move with liquid level change
(stays in down position)
Float and float rod fails to
move with liquid level change
(stays in up position)
Tighten assembly
Replace control (pilot)
Replace diaphragm
Increase inlet pressure
to 5 psi (minimum
requirement under
flowing conditions)
Replace control (pilot)
Tighten assembly
Free float
mechanism
Open CK2
isolation valve
Free float
mechanism
Open isolation valve
REMEDY
124-02
624-02
MODEL