SITECNA 04 Series Manual

Lock-up valves
Series 04 - 1/4”NPT
Installation, Regulation and
Maintenance Instructions
Sitecna Srl a Socio Unico
Via G. Di Vittorio, 22
20068 Peschira Borromeo
Milano - ITALY
Tel. [phone]
Fax [phone]
E-mail [email protected]
Web www.sitecna.eu
PART LIST
LABEL
REPARING KIT
HOW TO ORDER Not available
3= 0/100 psi
04= 1/4” NPT
TYPE
FILTER ELEMENT
PRESSURE GAUGE
OPTION
MATERIAL
DIAPHRAGM & SEALS MATERIAL
SIZE RANGE ACCESSORIES
LK = Lock-up Valve
0= None
0= None
00= Single lock-up
08= Doble lock-up
SS= 316-316L Stainless steel
AL= Copper free aluminum alloy
FK= FKM ( WT-25° +90°C )
NB= NBR ( WT-20° +80°C )
LT= EPDM ( WT-40° +80°C )
FL= Special compound (WT-55°+90°C)
HN= HNBR (WT -55°C +90°C)
0= None
2= SS bracket kit
4= Customised Tag
Specials
LK 04 3 0 00 0 0 SS FK 2 # #
For technical information refer to the corresponding technical data sheet
POS DESCRIPTION
1 SCREW M5x30
2 BONNET
3SCREW ADJUSTING
4 O-RING 5.28x1.78
5 SPRING PRESSER
6 REGULATING SPRING
7 SPHERE
8a SPRING SEAT
8b UPPER DIAPHRAGM
8c SPHERE SEAT
9 INTERMEDIATE BODY
10 LOWER DIAPHRAGM
11 PISTON
12 O-RING 5.28x1.78
13 BODY
14 O-RING 2.9x1.78
15 VALVE ASSEMBLY
16 O-RING 7.65x1.78
17 SPRING VALVE
18 O-RING 18.72x2.62
19 BOTTOM PLUG
20 NUT M8
21 PANEL MOUNTING NUT
22 PISTON (DOUBLE)
23 UPPER BODY (DOUBLE)
24 VALVE ASSEMBLY (DOUBLE)
25 RETAINING RING
26 LOWER BODY /DOUBLE)
27 SCREW M5x30
DOUBLE SINGLE
22
12
23
24
25
12
26
15
16
17
18
19
27
11
12
13
15
16
17
18
19
1
2
3
4
5
6
20
21
7
8b
14
9
10
8a
8c
14

1.INTRODUCTION
Throughout this manual there are a number of HAZARD
WARNINGS that must be read and adhered to in order to
prevent possible personal injury and/or damage to equi-
pment. Three signal work “DANGER”, “WARNING” and
“CAUTION” are used to indicate the severity of a hazard,
and are preceded by the safety alert symbol.
Danger Denotes the most serious hazard and is
used when serious injury or death WILL result from misuse
or failure to follow specic instructions.
Warning Used when serious injury or death MAY
result from misuse or failure to follow specic instructions.
Caution Used when injury or product/equipment
damage may result from misuse or failure to follow specic
instructions.
Caution It is the responsibility and duty of
Warning all personnel involved in the installation,
Danger operation and maintenance of the equi-
pment on which this device is used, to fully understand the
procedures by which hazards can be avoided.
The compatibility of the product is the responsibility of
the person who designs the equipment or decides its
specications.
Only personnel with appropriate training should operate
machinery and equipment.
Do not service or attempt to remove the machinery or
equipment until safety is conrmed.
2.DESCRIPTION
Lock Up Valve, LK04 sense the main supply pressure and
shuts down the air ow when the pressure is lower than set-
ting level to avoid system shutdown or damages to pipeline.
3. OPERATION
When signal pressure is greater than setting pressure le-
vel, upper diaphragm (8) is pushed upward by signal pres-
sure. As it gets pushed upward, vent port through lower
diaphragm (10) opens, so signal pressure pushes down
lower diaphragm (10). Lower diaphragm (10) pushes pu-
sh-shaft (11) and push-shaft (11) pushes disk-seat (13),
which supplies pressure will vent out through Lock Up Val-
ve. Opposingly, when signal pressure is less than setting
pressure level, upper diaphragm (8) is pushed downward
and lower diaphragm (10) will block signal-in port. Ball (7)
will be detached from upper diaphragm (8) and the pressure
will be exhausted
AISI316 and Aluminum Alloy Lock-up valve - 1/4”NPT
INSTALLATION, REGULATION & MAINTENANCE INSTRUCTIONS
4. PNEUMATIC DIAGHRAM
Fig.2 Double lock-up
5. TECHNICAL FEATURES
Medium: compressed air, inert gases, sweet and sour gase-
Port thread: 1/4”NPT
Max suply pressure: 10 bar
Max signal/output: 7 bar
Materials: Body SS316L or copper free aluminum alloy
Internal parts Stainless Steel
MATERIAL TEMPERATURE
DIAPHRAGM SEALS TRANSPORT STORAGE OPERATING
NBR NBR -20°C...+80°C -20°C...+80°C -20°C...+80°C
FKM FKM -25°C...+90°C -25°C...+90°C -25°C...+90°C
EPDM EPDM -40°C...+80°C -40°C...+80°C -40°C...+80°C
FVMQ FVMQ -55°C...+90°C -55°C...+90°C -55°C...+90°C
HNBR HNBR -55°C...+90°C -55°C...+90°C -55°C...+90°C
6.TRANSPORTATION & STORAGE
The preferred storage location is a clean, dry and protected
warehouse. If the components have to be stored outside,
precautions should be taken to keep valves clean and dry.
For storage temperatures, refer to the table in paragraph
“TECHNICAL FEATURS”.
To avoid contamination of impurities during the storage period,
don’t remove thread protection caps; remove them just before
the installation phase.
7. INSTALLATION
Warning Before performing any work, read this ma-
nual and study all gures. Assure yourself that you understand
and you can do what is required in each step. Failure to follow
these instructions may affect quick release valve operation and
may result in exposure to personal injury.
Before installing the valve, set and block the machine or equi-
pment in a secure position; close the air shutoff valve and
exhaust air from air lines and disconnect all electrical power.
• Caution It is recommendable to check its condi-
tions before the installation.
• Install the Lock-up valve to achieve the desired switching re-
sults. Connect the control pressure line to either SIGN port.
The port labelled port A1 (single LK) A2 (double LK) is the
inlet connections and ports B1 (single LK) B2 (double LK) is
the outlet connections.
• Apply a good grade of pipe compound to the external pipe
threads before making connections, making sure not to get
the pipe compound inside the switching valves.
• Install tubing tting or piping into the threaded NPT inlet and
signal connection on the body and into the threaded NPT
outlet connection.
8. TESTING
• With proper installation completed and downstream equi-
pment properly adjusted, slowly open the upstream and
downstream shut-off valve (when used) while using pressu-
re gauges to monitor pressure.
• If outlet pressure adjustment is necessary, monitor outlet
pressure with a gauge during the adjustment procedure.
The lock-up valve is adjusted by loosening the hex nut (20),
if used, and turning the adjusting screw (3) clockwise to in-
crease or counterclockwise to decrease the outlet pressure
setting. Retighten the hex nut to maintain the adjustment
position.
10. MAINTENANCE
Warning Before performing any work, read this
manual and study all gures. Assure yourself that you un-
derstand and can do what is required in each step. Failure
to follow these instructions may affect quick release valve
operation and may result in exposure to personal injury.
Before uninstalling the valve, set and block the machine or
equipment in a secure position; close the air shutoff valve
and exhaust air from air lines; disconnect all electrical power.
A.Ordinary maintenance
Caution The LK should be periodically checked
for proper functioning:
• Clean the LK from impurities and dirt;
• Visually check of the integrity of the body and cup of LK;
• Check that there aren’t leakages;
• Check the correct functionality of the LK.
B. Troubleshooting
Issue Possible Cause Fixes
when the signal
is off, the valve
is open
valve seat Check valve seat or contact
SITECNA technical support for more
information
leakage / high
bleed
bonnet or
retainer screws
valve o-ring
diaphragm
assemblies
Tighten the bonnet or retainer screws
If damaged, replace valve,
o-ring and diaphragm or contact
SITECNA technical support for more
information
11. MARKING ACORDING TO 2014/34/UEAtex
For using these equipment in potentially explosive atmo-
spheres, it is recommended - for the installation and the
maintenance operation - to use tools and instruments that
can produce only a single spark (for instance: screwdrivers,
spanners). Avoid use of tools that can produce sparks like
disk saw or grinder
Action must be taken to put to earth the units through a su-
itable connection, checking that all the metal components
(ttings and pipe line) have to be equitable potential.
Equipment have to be installed in the corresponding zone
according to the marking.
II 2G Ex h IIC T6/T5 Gb X
II 2D Ex h IIIC T85°C/T100°C Db X
After replacing the LK “TESTING” phase
Fig.1 Single Lock-up
20
21
2
5
7
9
13
3
6
8
10
11
15
17
SIGNAL
IN
EXHAUST
OUT
C. Disassembly
• Disassemble in general accordance with the item
numbers on exploded view.
D. Mantainance
1. Place the diaphragm assembly (8) on the body
(13) for single LK or (23) for double LK. Push down
on the diaphragm assembly.
2. Stack the ball (7) and control spring (6) onto the
diaphragm assembly (7).
3. Install the cover (2) and screw adjusting (3) on the
body.
4. Install the six screws (4).
5. Lubricate the adjusting screw (3).
E.Assembly
• Assemble in general accordance with the item
numbers on exploded view.
NOTE: special conditions for safe use (X conditions)
Before performing any work, read this manual and assure
yourself you understand. X at the end of ATEX sobstitutes
T amb for series VB, DP, VSR, RF, LK, SCLP, T F, FLGSS, VP,
SLHF, SLVP, SLSC, PV. T amb depeends on used seals,
based on the following correspondance:
NBR=-20°C...+80°C, FMK=-25°C...+90°C,
EPDM= -40°C...+80°C, FVMQ & HNBR= -55°C...+90°C

Sitecna Srl a socio unico
Via G. Di Vittorio, 22
20068 Peschiera Borromeo
Milano - Italy ( Europe)
Milano –Italy ( Europe)
Tel. [phone] ra
[phone] ra
Fax [phone]
e-mail : [email protected]
P.IVA/C.FISC. 08973090155
NR MECC. MI253803
C.C.I.A.A. 1259759
Dichiarazione di conformità UE
In accordo con la Direttiva Europea 2014/34/UE
EU-Declaration of Conformity
In accordance with Directive 2014/34/EU
Noi, Sitecna Srl, dichiariamo che i seguenti prodotti / Sitecna Srl declares that the following equipment:
Product
mod.
Product
mod.
Product
mod.
Filter
F…
Volume Booster
VB…
Flow regulator
RFB…, RFU…
Regulator
R…
Control spool valve
DP…
Glass tube flowmeter
FLGSS…
Filter Regulator
FR…
Quick exhaust valve
VSR…
Vacuum pump
ST-VP…
Back Pressure valve
BP
Lock-up valve
LK…
Silencer
SLHF…, SLVP…, SLSC…
2 ways switching valve
SV…
Overload protector
SCLP…
Dust excluder
PV…, PVSL…
3 ways switching valve
S3…
Tee Filter
TF
Pressure gauge
MBSS…, MBS6…, MBSN…
Sono conformi alla normativa di armonizzazione dell’Unione / They comply with the Union harmonization legislation:
Direttiva 2014/34/UE ATEX
Direttiva 2014/34/UE del Parlamento europeo e del Consiglio, del 26 febbraio 2014,
concernente l’armonizzazione delle legislazioni degli Stati membri relative agli
apparecchi e sistemi di protezione destinati a essere utilizzati in atmosfera
potenzialmente esplosiva (rifusione) Testo rilevante ai fini del SEE.
Directive 2014/34/EU of the European Parliament and of the Council of 26 February
2014 on the harmonisation of the laws of the Member States relating to equipment and
protective systems intended for use in potentially explosive atmospheres (recast) Text
with EEA relevance.
Secondo le seguenti Norme di riferimento / As per folowing reference Normative Documents:
EN ISO 80079-36:2016
Atmosfere esplosive - Apparecchi non elettrici per atmosfere esplosive -
Metodo di base e requisiti
Explosive atmospheres - Non-Electrical equipment for explosive atmospheres - Basic
method and requirements
EN ISO 80079-37:2016
Atmosfere esplosive - Apparecchi non elettrici per atmosfere esplosive –
Tipo di protezione non elettrica per sicurezza costruttiva "c", per controllo della sorgente
di accensione "b", per immersione in liquido "k"
Explosive atmospheres - Non-Electrical equipment for explosive atmospheres - Non-
electrical type of protection constructional safety ''c'', control of ignition sources ''b'', liquid
immersion ''k''
N 1127-1:2011
Atmosfere esplosive - Prevenzione dell’esplosione e protezione contro l’esplosione -
Concetti fondamentali e metodologia
Explosive atmospheres - Explosion prevention and protection - Basic concepts and
methodology
Ai sensi della Direttiva 2014/34/EU, i prodotti sopra indicati riportano la seguente marcatura / According to the Directive 2014/34/EU,
above mentioned products reports the following marking:
II 2G Ex h IIC T6/T5 Gb X
II 2D Ex h IIIC T85°C/T100°C Db X
Inoltre, ai sensi della direttiva 2014/34/UE, i prodotti sopra menzionati sono oggetto, per gli aspetti relativi sia alla progettazione sia alla fabbrica-
zione, al controllo interno di fabbricazione (Allegato VIII –Modulo A). Ref 557/Ex-Ab 3213/20 c/o N° 0035 TÜV Rheinland.
In conformity to Directive 2014/34/EU, the afore mentioned equipment, regarding their design and production, are object to internal manufacturing
check (Attachment VIII –Module A). Ref 557/Ex-Ab 3213/20 c/o N° 0035 TÜV Rheinland.
La presente dichiarazione di conformità è rilasciata sotto
la responsabilità esclusiva del fabbricante.
This declaration of conformity is issued under exclusive
responsibility of the manufacturer.
Milan, 20/05/2020
Davide Matteo De Corrado
Managing Director
Trace No: xxxx