Design
AS 1357.2
LIC 2532
Field of application
9.0068.09 0449
Maintenance
Operation
Opentheisolatingvalvesaftertheinstallationiscomplete.
Onmodelswithadjustingknob,thepressureisadjustable
between 0,5 and 5 bar (it is factory preset at 4 bar)(see
Fig. A) :
1- Slacken the set screw in the handle.
2- Turn knob counterclockwise (-)
3- Open and close a tap downstream of the pressure
reducer
4- Turn handle clockwise (+) to the desired pressure
5- Tighten set screw
Onsealedmodels,theoutletpressureisindicatedonthe
sealing disc (see Fig. B).
Fig. A Fig. B
Installation
Pressure reducing valve with balanced single-seated
Internals and coaxially arranged strainer. The complete
control unit can be exchanged by removing spring cap
withoutanychangetothedownstreampressuresetting.
Several factory settings are available for downstream
pressure,set oradjustable.
The312valvediffersfromthe315.5valveinthatthelatter
hasacheck-valvemadeofPOM(WRCapproved)inthe
outletport.
Body made of bronze / DZR material; spring cap high
gradeglassreinforcedplastic;diaphragmandsealsmade
ofheatandageproofrubberelasticmaterial,diaphragm
reinforcedbypolyamidefabricinlay;springmadeofspring
steelwire,corrosionprotected;allotherinnerpartsmade
ofsteel1.4305/DZR-material;strainermadeofcorrosion
protected steel, mesh width 0,25 mm.
Pressuregaugeconnection : Rp1/4ISO228/1,
both sides
Inlet pressure: max. 16 bar
Outlet pressure: 0,5 - 5 bar; factory
setting 4 bar
Operatingtemperature: max. 60 °C
Media : water,compressed
air,neutralnon-
adhesiveliquids,
neutralgases
Reductionratio : max. 10:1
Installation position : anyorientation
The pressure reducing valve 312 / 315.5 is used for
reducingpressureinclosedsystemswithmediaasgiven
in the specifications below.
The pressure reducing valve should be fitted free from
stress into the water supply. Installation in the main
supply isrecommendedtoproduceequalpressurevalues
in the whole installation. The valve is protected against
malfunction(causedbydirtparticles)byanincorporated
strainer(meshwidth0,25mm).Incaseofparticlesofless
size,werecommendtheinstallationofaSYRDrufi filter.
Forproperoperation,theinletpressureshallbeatleast1
barhigher, thanthe indicatedoutletpressure.
In cases where irreparable damage has been caused to
thecartridgeasparecartridgecanbepurchasedandfitted
withouttheneedto replacetheentirevalve.
Under normal conditions the pressure reducing valve
shouldnotrequireanyspecialmaintenance.
If the outlet pressure increases to the same level as the
inletpressure,thevalveseatmaybeclogged.Ifso,itwill
be necessary to clean the built in pressure reducer
cartridge.
To do this,
1- Closeisolatingvalvesupstreamanddownstreamof
thepressurereducer
2- Unscrewcap
3- Removethe captogetherwith completecontrolunit
4- Rinsein cleanwater
Donot useany solvents
to clean the strainer as
this may cause damage
to the plastic
components of the valve.
Thecompletecartridgecan
now be replaced into the
body.
Thepressuresettingwillnot
need to be reset due to the
unique design of the SYR
312/315.5valve.
