INOXPA OVERFLOW Manual

1
INSTALLATION, SERVICE AND MAINTENANCE
INSTRUCTIONS
ANNEX FOR EC ATEX REGISTERED EQUIPMENT UNDER
DIRECTIVE 2014/34/EU:
Ex OVERFLOW VALVE
The contents of this Annex complements the information included in the
instruction manual. The instructions of this Annex must be observed
whenever equipment registered under Directive 2014/34/EU is used.
Original Manual
10.207.30.01EN
(A) 2022/11
If applicable, this Annex will be complemented with the manuals of the
ATEX registered components that form part of the assembly (e.g., seals,
etc.).

(1) the serial number may be preceded by a slash and by one or two alphanumeric characters
EU Declaration of Conformity ATEX 2014/34/EU
We,
INOXPA, S.A.U.
Telers, 60
17820 –Banyoles (Girona)
Hereby declare under our sole responsibility that the machine
VALVE
Model
OVERFLOW
From serial number IXXXXXXXXX to IXXXXXXXXX (1)
Fulfills all the relevant provisions of Safety and Health from ATEX 2014/34/EU Directive and
are adapted to the harmonized norms:
EN ISO 80079-36:2016
EN ISO 80079-37:2016
EN 1127-1:2019
EN 13237:2012
EN 15198:2007
This Declaration of Conformity covers equipment with the following ATEX marking:
The technical documentation referenced 019074/18 is on file with the notified body INSTITUT
NATIONAL DE L’ENVIRONNEMENT INDUSTRIEL ET DES RISQUES (INERIS), Parc
Technologique Alata BP 2, 60550 Verneuil-en-Halatte, France. Reference num. 0080.
Signed by and on behalf of:
INOXPA, S.A.U.
David Reyero Brunet
Technical Office Manager
Banyoles, 2022
II 2G Ex h IIB T6…T3 Gb
II 2D Ex h IIIB T85 ºC…T200 ºC Db
10.207.30.06EN
(0) 2022/11

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1. Safety
1.1. INSTRUCTIONS MANUAL
1.2. START-UP INSTRUCTIONS
1.3. SAFETY
1.3.1. Warning symbols
Danger! Important instructions for protection from explosions.
1.4. GENERAL SAFETY INSTRUCTIONS
1.4.1. During installation
To reduce the risk of static electricity, the assembly must be earthed to ensure
electrical continuity between the pipes and the valve
1.4.2. During operation
The limits of the operating conditions in explosive atmospheres must not be exceeded
This valve was selected according to the operating conditions specified by the user.
Therefore, INOXPA disclaims liability for any damage caused by the use of the valve
under conditions other that those set forth in the order
1.4.3. During maintenance
Danger! Important instructions for protection from explosions.
An explosive atmosphere may be generated or be present when the valve is being
disassembled, so safe-work permits must be issued and these jobs must only be done
by qualified or trained personnel
1.4.4. Compliance with the instructions
Any non-fulfilment of the instructions may result in a risk for the operators, the environment, the
machine, and the installations, and may result in the loss of your right to claim damages.
This failure to comply may create the following risks (in addition to those already indicated in the
manual):
-Creation of explosive atmospheres and the risk of explosion.

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1.5. GUARANTEE
Any guarantee will be cancelled immediately and as a matter of law and, in addition, we will require
compensation for any claims of civil liability presented by third parties, in case (in addition to the
conditions already indicated in the manual):
- The material has been badly used or has not been used according to the operating conditions in the
classified area, operating in a different classified area, temperature or pressure conditions, and/or with a
different substance.

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ED. 11/2022 2. TABLE OF CONTENTS OVERFLOW VALVE
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2. Table of Contents
The indications of such sections must be observed in addition to those of
the valve manual.
1. Safety
1.1. Instructions manual 3
1.2. Instructions for starting up 3
1.3. Safety 3
1.4. General safety instructions 3
1.5. Guarantee 4
2. Table of Contents
3. Receiving and installation
3.1. Checking the shipment 6
3.2. Delivery and unpacking 6
3.3. Identification 6
3.4. Location 7
3.5. Flow direction 7
3.6. Overflow valve position 7
3.7. Assembly 7
3.8. Inspecting and checking 8
3.9. Welding 8
4. Start-up
4.1. Single-seat VALVE application 9
4.2. Starting up 9
4.3. Operation 9
4.4. Valve calibration 9
5. Operating problems: Causes and solutions
6. Maintenance
6.1. General 11
6.2. Maintenance 11
6.3. Cleaning 12
7. Assembly and disassembly
7.1. Disassembly / Assembly of the overflow valve fig: 74700 13
7.2. Disassembly / Assembly of the overflow valve fig: 74700M 14
7.3. Disassembly / Assembly of the overflow valve with PTFE seat 15
7.4. Disassembly / Assembly of the overflow valve fig: 74700M with PTFE seat 16
8. Technical Specifications
8.1. Overflow valve dimensions 18
8.2. Section and parts list 19

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3.Receiving and installation
3.1. CHECKING THE SHIPMENT
The received valve must be checked to ensure that it is adapted to the working
conditions in the classified area and the conditions stated in the order
3.2. DELIVERY AND UNPACKING
3.2.1. Delivery
3.2.2. Unpacking
3.3. IDENTIFICATION
In the case of ATEX valves, additional identification will be established with the following:
The temperature class and the maximum surface temperature depend on the temperature of the product to
be stirred and the ambient temperature.
Temperature class for explosive gas atmospheres
Temperature
class
Product temperature (in process
or cleaning)
Room temperature
T6
≤ 60 °C
-20 °C to +40 °C
T5
≤ 75 °C
T4
≤ 110 °C
T3
≤ 140 °C
Maximum surface temperature for explosive dust atmospheres
Maximum
surface
temperature
Product temperature (in process
or cleaning)
Room temperature
T85 °C
≤ 85 °C
-20 °C to +40 °C
T100 ºC
≤ 100 °C
T125 ºC
≤ 125 °C
T 200 °C
≤ 200 °C
3.4. LOCATION
3.5. FLOW DIRECTION
3.6. OVERFLOW VALVE POSITION
3.7. ASSEMBLY
To reduce the risk of static electricity, the assembly must be earthed to ensure
electrical continuity between the pipes and the valve
II 2G Ex h IIB T6…T3 Gb
II 2D Ex h IIIB T85ºC…T200 oC Db

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3.8. INSPECTING AND CHECKING
3.9. WELDING
Safe-work permits shall be required for any welding work in potentially explosive
atmospheres. It is strongly recommended that this type of work be carried out in
non-classified atmospheres (i.e. there must not be an explosive atmosphere in the
location of the valve when it is being handled)
3.9.1. Welding/welding overflow valve. Fig. 74700.

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4.Start-up
4.1. VALVE APPLICATIONS
4.2. STARTING UP
The received valve must be checked to ensure that it is adapted to the working
conditions in the classified area and the conditions stated in the order
Ensure that there is electrical continuity between the valve and the installation,
and that the installation has an earth connection
4.3. OPERATION
Do not modify the operating parameters for which the valve has been designed
without written prior authorisation from INOXPA
The valve was selected for specific working conditions in potentially explosive
atmospheres at the time the order was placed. INOXPA will not be responsible for
any damage which may be caused if the information provided by the buyer is
incomplete or incorrect (type of liquid, viscosity, classification of the potentially
explosive zone, gas generated by the potentially explosive atmosphere, etc.)
4.4. VALVE CALIBRATION

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6.Maintenance
6.1. GENERAL
Valves must only be assembled and disassembled by qualified staff, taking into
account that it is necessary to adopt safe-work permits if working in a potentially
explosive atmosphere
6.2. MAINTENANCE
6.2.1. Maintenance of the seals
6.2.2. Storage
6.2.3. Spare parts
When ordering spare valve parts to work in a classified area, the order must explicitly indicate
that the parts will be used in an ATEX area, and must state the characteristics of that area.
Otherwise, INOXPA cannot ensure that the valve operates with parts that are suitable for the
classified area within which it is installed.
6.3. CLEANING
Before starting disassembly and assembly work, the presence or possible formation
of potentially explosive atmospheres must be taken into account

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7.Assembly and disassembly
Valves must only be assembled and disassembled by qualified staff, taking into
account that it is necessary to adopt safe-work permits if working in a potentially
explosive atmosphere
7.1. DISASSEMBLY / ASSEMBLY OF THE OVERFLOW VALVE FIG: 74700
7.2. DISASSEMBLY / ASSEMBLY OF THE OVERFLOW VALVE FIG: 74700M
7.3. DISASSEMBLY / ASSEMBLY OF THE OVERFLOW VALVE WITH PTFE SEAT FIG:
7.4. DISASSEMBLY / ASSEMBLY OF THE OVERFLOW VALVE FIG: 74700M WITH PTFE
SEAT

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ED. 11/2022 8. TECHNICAL SPECIFICATIONS OVERFLOW VALVE
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8.Technical Specifications
Temperature range. See section 3.3.
8.1. RELIEF VALVE DIMENSIONS
8.2. SECTION AND PARTS LIST