Alfalaval CSI SPC-2 User manual

IM70736-GB4 1997-08
SPC-2 Sanitary Electro-Pneumatic Modulating Valve
Instruction Manual

Name Title
Company Signature
Alfa Laval
6000 Kolding
[phone]
Company Name
Address
Phone No.
hereby declare that
Denomination Type Year
Declaration of Conformity
The designating company
Designation
Was manufactured in conformity with the provisions in the COUNCIL DIRECTI E of 14 June
1989 on mutual approximation of the laws of the Member States on the safety of machines (89/
392/EEC as amended by directives 91/368/EEC and 93/44/EEC) with special reference to Annex
1 of the directive on essential safety and health requirements in relation to the construction
and manufacture of machines.
Bjarne Søndergaard Vice resident, R & D
Alfa Laval
SANITARY ELECTRO- NEUMATIC
MODULATING VALVE S C-2

1
Safety
This manual is divided up into main sections. - See
below.
1. Important information ................................. 2
2. Warning signs ........................................... 2
3. Safety precautions .................................... 3
1. Unpacking/Delivery .................................... 4
2. Installation ................................................
1. General operation ...................................... 6
2. Fault finding .............................................. 6
3. Adjustment of the valve ............................. 7
4. Adjustment in case of 20 mm stroke
deviation .................................................... 8
. Changing of the actuator function .............. 9
6. Recommended cleaning .......................... 10
1. General maintenance .............................. 11
2. Dismantling ............................................. 12
3. Reassembly ............................................ 13
1. Technical data......................................... 14
2. Selection/Pressure drop - capacity
diagram ................................................... 1
1. Parts list ........................................... 16+18
2. Exploded drawing .................................... 17
3. Drawings ................................................. 19
Table of contents
Installation
Operation
Maintenance
Technical data
Drawings/Parts list

2
Indicates that special procedures must be fol-
lowed to avoid severe personal injury.
Indicates that special procedures must be fol-
lowed to avoid damage to the valve.
Indicates important informations to simplify
practices or to make them clearer.
WARNING! :
CAUTION! :
NOTE! :
:
:
General warning.
Caustic agents.
2. Warning signs
Safety
Unsafe practices and other important information are
emphasized in this manual.
Warnings are emphasized by means of special signs.
1. I portant infor ation
Always read the manual before us ng the valve!

3
3. Safety precautions
Installat on:
:
Operat on:
:
:
:
Ma ntenance:
:
:
-Always read the technical data thoroughly
(See page 14).
-Always release compressed air after use.
-Always read the technical data thoroughly
(See page 14).
-Always release compressed air after use.
-Always disconnect the electrical connection
before dismantling.
-Never touch the valve or the pipelines when
processing hot liquids or when sterilizing.
-Never dismantle the valve with valve and
pipelines under pressure.
Always handle lye and acid with great care.
-Always read the technical data thoroughly
(See page 14).
-Always release compressed air after use.
-Always disconnect the electrical connection
before service.
-Never service the valve when it is hot.
-Never service the valve with valve and pipe-
lines under pressure.
All warnings in the manual are summarized on this
page.
ay special attention to the instructions below so that
severe personal injury and/or damage to the valve
are avoided.
Safety

4
1
3
5
4
2
Caution!
Installation
The instruction manual is a part of the delivery. Study the instructions carefully.
1. Unpacking/Delivery
NOTE!
We cannot be held responsible for incorrect
unpacking.
Check the delivery for:
1. Complete valve.
2. Delivery note.
3. Instruction manual.
Avoid damaging the air connection, the electrical
connection and the valve ports.
Remove possible packing materials from the
valve ports.
Inspection!
Inspect the valve for visible transport damages.
emove
packing
materials!
Air

5
Dimension A (mm)
38mm/DN40 100
1mm/DN 0 10
63. mm/DN6 130
76mm/DN80 14
101.6mm/DN100 180
1
3
5
emember seal rings!
4
2
6
Weld carefully!
Installation
Study the instructions carefully and pay special
attention to the warnings!
The valve has welding ends as standard but can also
be supplied with fittings.
2. Installation
Avoid stressing the valve.
Pay special attention to:
- Vibrations.
- Thermal expansion of the tubes.
- Excessive welding.
- Overloading of the pipelines.
Fittings:
Ensure that the connections are tight.
Welding:
1. Remove the internal valve parts in accor-
dance with instruction 1 on page 12.
2. Weld the valve into the pipelines.
3. Assemble the valve in accordance with in-
struction on page 13.
Welding into a manifold:
Maintain the minimum clearance (A) so that the
actuator can be removed.
Electrical connection:
1. Remove the black cover from the actuator.
2. Fit the cable through the cable gland and
connect it to the terminal strip. Ensure
correct polarity (11 = +,12 = -)!
3. Tighten the cable gland and refit the cover.
-Always read the technical data
thoroughly (See page 14).
-Always release compressed air after
use.
CAUTION!
- Always let the valve be electrically connected
by authorized personnel.
- The I/P-converter of the actuator is adjusted
before delivery and must never be opened.
NOTE!
We cannot be held responsible for incorrect
installation.
isk of damage!
A
Cover for
electrical
connection

6
2
-Never touch the valve or the pipelines
when processing hot liquids or when
sterilizing.
-Never dismantle the valve with valve
and pipelines under pressure.
1
-Always read the technical data
thoroughly (See page 14).
-Always release compressed air after
use.
-Always disconnect the electrical con-
nection before dismantling.
CAUTION!
The I/P-converter of the actuator is adjusted be-
fore delivery and must never be opened.
NOTE!
We cannot be held responsible for incorrect
installation.
2. Fault finding
NOTE!
- Study the adjustment instructions carefully be-
fore adjusting the valve. - See page 7-8!
- Study the maintenance instructions carefully
before replacing worn parts. - See page 11!
Operation
The valve is adjusted and tested before delivery.
The adjustment instructions on page 7-8 are only to
be used if further adjustment is required!
Study the instructions carefully and pay special
attention to the warnings!.
ay attention to possible faults.
Problem Cause/result epair
- Leaking lip seal at the piston - Worn lip seal - Replace the lip seal
- Leaking seal at the valve - Incorrect rubber grade - Replace with a seal of a dif-
body ferent rubber grade
Deviation in the flow regulation Worn valve plug Replace the plug and adjust
(See page 7)
Deviation in the flow regulation Mechanical parts have come Tighten and adjust
loose (vibrations) (See page 7)
Actuator does not regulate Actuator errors Return the actuator to the supplier
1. General operation
Atmospheric
pressure re-
quired!

7
1
34
2
Operation
3. Adjust ent of the valve
The valve is adjusted and tested before delivery.
The adjustment instructions on this page are only to
be used if further adjustment is required!
Study the instructions carefully.
Calibrate with care.
1. Loosen and remove clamp fitting (9).
2. Remove the cover from the terminal box.
3. Fit air fittings in entry 9 on the actuator.
4. Supply compressed air (4 bar) to the air fittings.
1. Set the highest signal (20 mA), + on ter-
minal block 11 and - on terminal block 12.
NOTE!
For NC valve the signal must be 4 mA.
2. Make sure that valve plug (2) is pressed
against the valve seat.
1. Adjust valve plug adjuster (7) so that it
contacts the actuator piston rod. (Give 1/4
extra turn to give preforce on the plug).
2. Tighten lock nut (8) using a spanner.
3. Fit and tighten clamp fitting (9) to connect
the actuator piston rod with valve plug (2).
Check the stroke by changing the signal from 20
to 4 mA (NO) (Opposite if NC).
Stroke = 20 mm + 1.
NOTE!
In case of deviation from 20 mm stroke, see
page 8.
5
Move valve plug (2) up and down several times and
check that the valve plug is still in closed position.
If not, readjust.
Terminal box
Supply air
Terminal
blocks
Contact
Stroke = 20 mm±1

8
Contact
1
3
2
Operation
The valve is adjusted and tested before delivery.
The adjustment instructions on this page are only to
be used if further adjustment is required!
Study the instructions carefully.
Adjust with care.
NO = Normally open.
NC = Normally closed.
4. Adjust ent in case of 20 stroke deviation
NOTE!
Maximum stroke is 21 mm.
1. Place a 20 mm block between the actuator piston
rod and the valve plug (2).
2. Adjust valve plug adjuster (7) to a position with a
distance of 0. mm + the 20 mm block between the
actuator piston rod and the valve plug (use a gauge
blade to determine the 0. mm).
3. Adjust with the zero-screw (counterclockwise) until
the actuator piston rod contacts the 20 mm block
and can be moved slightly. Turn the zero-screw 1/2
round (counterclockwise) to give preforce on the
valve plug.
CAUTION!
Do not touch the zero-screw.
1. Pull the spring lever gently down to release
the 20 mm block.
2. Remove the 20 mm block.
zero-screw Entry 9 Entry 36
20.5 mm 20 mm
zero-screw
Spring lever
4
1. Set the highest signal (20 mA), + on the
terminal block 11 and - on the terminal block
12 (4mA for NC valve) (the actuator piston
rod contacts valve plug (2) and gives preforce).
2. Fit and tighten clamp fitting (9) to connect
the actuator piston rod with the valve plug.
3. Check that the stroke is 20 mm.
1. Release compressed air.
2. Remove clamp fitting (9).
3. Remove the terminal box cover.
4. Supply compressed air (4 bar) to entry 9.
. Set the lowest signal (4mA), + on terminal
block 11 and - on terminal block 12 (20mA
for NC valve).
6. Adjust with the zero-screw (clockwise) to
ensure max. open position.