Festo VOFC-LT-M32C Manual

Festo Ikke kategoriseret VOFC-LT-M32C

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Side 1/2

VOFC-LT-M32C

Valve

Festo SE & Co. KG

Ruiter Straße 82

73734 Esslingen

Germany

+49 711 347-0

www.festo.com

Operating instruction

8115806

2023-02a

[8101559]

8115806

Translation of the original instructions

1 About this document

1.1 Purpose of the document

This document describes the use of the above-mentioned product. It contains

additional information for the use of the product in safety-related systems (safety

manual in accordance with IEC61508).

1.2 Applicable documents

–Assembly instructions

All available documents for the product

èwww.festo.com/sp.

1.3 Target group

This document is targeted towards individuals who mount and operate the

product. It is additionally targeted towards individuals who are entrusted with

the planning and application of the product in a safety-oriented system.

1.4 Specified standards

Version

IEC 61508-1:2010 IEC 61508-4:2010

IEC 61508-2:2010 IEC 61511:2016

Tab. 1: Specified standards

2 Safety

2.1 Safety instructions

–Only use the product in its original condition without unauthorised modifica-

tions.

–Only use the product if it is in perfect technical condition.

–Observe the identifications on the product.

–Only use media in accordance with the specifications è10Technical data.

–The product must be regularly tested by a qualified technician, and the test

must be documented è9Maintenance.

Return to Festo

–In the event of malfunctions or failure: replace the product and inform Festo of

the failure.

–Before returning the product, contact your Festo specialist advisor.

2.2 Intended use

The valves VOFC-LT-M32C are directly actuated electromechanical control valves.

The consist of a basic valve of the VOFC-LT-M32C series in combination with a

solenoid coil of the VACC-S13 series. The valves are used to control pneumatic

actuators.

2.3 Training of qualified personnel

Work on the product may only be carried out by qualified personnel who can

evaluate the work and detect dangers. The qualified personnel have knowledge

and experience in process automation.

3 Additional information

–Contact the regional Festo contact if you have technical problems

èwww.festo.com.

–Accessories and spare parts èwww.festo.com/catalogue.

4 Information on functional safety

4.1 Achievable safety classification

The product is suitable for use as an element in a safety-oriented system in

accordance with IEC 61511.

–in low-demand mode up to SIL 2

–in high-demand mode up to SIL 2.

Taking into account the necessary minimum hardware fault tolerance of HFT = 1,

the product can also be used up to SIL 3 with a redundant design of the entire

system.

NOTICE

It is only possible to determine whether the product is suitable for specific appli-

cations by also assessing further components of the subsystem.

4.2 Safety function

The safety function comprises the safe venting of an actuator connected to port 2.

The safety function is triggered by switching off the power supply at the solenoid

coil.

The connection between ports 2 and 3 remains open while the voltage remains

switched off at the solenoid coil. This switching position represents the safe state.

4.3 Operating conditions

–General information on safe operation

è2Safety.

–Periodic tests (performance test) è9Maintenance.

–Ambient conditions and additional technical specifications è10Technical

data.

4.4 Limitations of use

If the operating conditions are in compliance, the service life is a maximum of

14years.

5 Function

The valve is a 3/2-way valve with internal pilot air supply. If the operating pressure

is less than 2bar, an external pilot air supply with 2 bar must be connected.>

When the system is de-energised, the armature is pressed onto the nozzle by a

spring. This closes the internal pilot air line leading to the diaphragm.

–If voltage is applied at the solenoid coil: the armature opens the nozzle. The

diaphragm pushes the control piston against a spring in the final control ele-

ment. Exhaust port3 is closed and the flow rate between ports 1 and 2 is

unblocked.

–If there is no voltage at the solenoid coil: the compressed air supply from port1

is closed. Port 2is connected with exhaust port3. This allows a downstream

control unit to be exhausted.

Fig. 1: Circuit symbol

6 Assembly

Fig. 2: Mounting the solenoid coil on

the valve body

Vent screw

Spring washer

Solenoid coil

Armature guide tube

1. Ensure that moisture cannot accumulate in the valve.

2. Slide solenoid coil [3] onto the armature guide tube [4]. Check: sealing com-

pound points to the valve body.

3. Slide spring washer [2] onto the armature guide tube.

4. Tighten vent screw [1]. Tightening torque: 5Nm ±20%.

7 Installation

7.1 Requirements

–The piping is unpressurised.

–Connecting cables and fittings are clean.

–The power supply is switched off.

Produkt Specifikationer

Mærke:	Festo
Kategori:	Ikke kategoriseret
Model:	VOFC-LT-M32C

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