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GEA SVA 455 Series User Manual

GEA SVA 455 Series
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Sicherheitsventile / Safety Relief Valves
GEA Germany
GEA AWP GmbH
Armaturenstr. 2
17291 Prenzlau, Germany
Tel +49 3984 8559-0
Fax +49 3984 8559-18
info@awpvalves.com
awpvalves.com
The information contained in this brochure merely serves as a
non-binding description of our products and is without guarantee. Binding information, in particular relating to capacity data an
d suitability for specific applications, can only be provided wit
hin the framework of concrete
inquiries. Printed on chlorine
-free bleached paper · Printed in Germany · Subject to modification
5 Betriebsvorschriften / Operating Instructions
operating conditions have to be considered. Safety
devices that are subject to discharging incendive
media and therefore constitute a direct or indirect
hazard to persons and ignition sources in their
environment must be appropriately protected (e. g.
discharging into a safe environment).
The recommended steps to limit potential explosions,
resp. the recommendations for wearing personal
protection equipment have to be attended and
followed mandatorily when screw connections are
being loosened or the pressure spring is being
slackened.
Safety devices may be exclusively maintained by the
manufacturer.
Safety devices may only be replaced when the plant
and its pipes are secured and depressurized. When
inflammable gases such as propane, butane, methane
are being used this has to be done with tools that do
not create sparks.
When ammonia is being used as refrigerant, special
safety instructions have to be followed (see safety data
sheet).
After the safety valve has been installed a leakage test
has to be performed by an authorized person.
The response pressure has to be checked in regular
intervals according to the setting certificate.
4. Application
AWP safety valves are suitable for being employed as
relief or overflow valves in the refrigerant cycles of
industrial refrigerating plants (! only SVU 457 / 458).
Safety valves are safety devices for protecting the
refrigerating plant or its components from excess
pressure (see also EN 378 part 2). They correspond to
the AD2000 set of rules.
5. Functional Description
Once an AWP safety valve has responded, it opens
within a pressure increasing range of 10 % until it
reaches the constructional limit. They close within a
pressure dropping range of 10 % below the set
response pressure.
The types SVU 457 / 458 are equipped with a metal
bellows to compensate the back pressure, i.e. the
valve is independent of back pressure!
! Response pressure = set pressure!
The back pressure [abs.] may not exceed 25 % of the
set pressure [abs.] in order to ensure the K
dr
-value.
The types SVA 455 / 456 work dependent on back
pressure.
! Response pressure = set pressure + foreign back
pressure!
The back pressure [abs.] may not exceed 10 % of the
set pressure [abs.] in order to ensure the K
dr
-value.
Sicherheitshinweise, Anwendung, Funktionsbeschreibung
Safety Advices, Application, Functional Description

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GEA SVA 455 Series Specifications

General IconGeneral
BrandGEA
ModelSVA 455 Series
CategoryControl Unit
LanguageEnglish

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