Introduction; Manufacturer; About This Document; Illustration Conventions - Leser 4401 Instrucciones De Servicio

Operating Instructions
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Introduction

1.1 Manufacturer

LESER manufactures safety valves for all
industrial applications. A large selection of
types, materials and options are available.
Safety valves from LESER fulfil all quality
and environmental requirements.
LESER is certified according to:
• DIN EN ISO 9001/2000
(quality management system),
• DIN EN ISO 14001/2005
(environmental management system),
• Pressure Equipment Directive Module
B+D1 (quality assurance in production),
• ASME VIII (UV).

1.2 About this Document

This document covers the following types
of safety valves and peripheral devices in
summary form:
• spring-loaded safety valves (A),
• pilot-operated safety valves (B),
• supplementary loaded safety valves (C).
Safety valves can also be equipped with
bursting discs, pneumatic supplementary
loading, bellows and upstream change-
over valves.
Certain regulations and standards apply
depending on the system and medium.
These regulations and standards must be
observed. In addition to the information in
these operating instructions, the generally
applicable safety and work safety regula-
tions must also be observed as well as
the applicable user guides for additionally
purchased parts. In like manner, the envi-
ronmental protection regulations must be
adhered to.

1.3 Illustration Conventions

Safety guidelines and warnings identify
safety-relevant information. These operat-
ing instructions differentiate between the
following risk levels:
DANGER
This identifies the highest risk situa-
tion. If the guidelines are not observed,
the result will be serious injury or death.
WARNING
This identifies a high risk situation. If the
guidelines are not observed, the result may
be serious injury or death.
CAUTION
This identifies a risky situation. If the guide-
lines are not observed, the result may be
minor or medium injuries.
CAUTION
This identifies warnings regarding material
damage. If the guidelines are not observed,
the result may be material damage.
The safety guidelines and warnings are or-
ganised as follows:
EN
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