Bypass Valve
Type
Max pressure: 10 MPaMax flowrate: 15 dm 3 /s (900 I/min)
High & Medium pressure pumps GA - 5783 GA
GA 1102 GB APPLICATIONS
Bypass
valve type GA is intended for use as a pressure-relief
valve in hydraulic systems, oil circulation circuits, oilfiring systems, etc.
The
valve is intended for mineral oils and liquids with similarproperties and must not be used for water, steam, corrosiveliquids or the like.
MODE OF FUNCTION
Bypass
valve type GA is direct-acting and is distinguished
by its high speed during the opening process, enablingpressure surges in the event of sudden changes in volumetricflow to be kept at a low level.
The
valve features a built-in, automatically acting hydraulicpressure compensation device which endeavours to keepthe pressure rise as small as possible within the flow rate
range area specified for the
valve (cf. pressure rise in re-sponse to increasing flow for a purely spring-loaded
valve)During the closing process, the pressure largely coincides
with the pressure during the opening process. For fineadjustment of the
valve characteristics, the
valve is providedwith a throttling screw at the outlet which, upon delivery, is
factory set and which does not usually require subsequentadjustment.
VERSIONS
The bypass
valve type GA is available in the followingversions: GAR with
valve casing for threaded pipe connections GAS with
valve casing for SAE-flanged pipe connections GAD with
valve casing for DIN-flanged pipe connection
MATERIAL
Valve casing - steel for types GAR and GAS- nodular iron for type GAD Spring casing - steel for sizes 012, 015, 020, 034- nodular iron for sizes 025, 040, 065, 100, 112 O-rings - Viton rubber Other parts - steel
Model Code
Valve seriesModel
G A
R = Threaded pipe connectionsS = SAE-flanged pipe connectionsD = DIN-flanged pipe connections Size (size code according to type specification overleaf) Design specification (upon deviation from standard design - 0 indicatesstandard design) Design modification (1 - indicates original design) Valve spring (code according to type specification overleaf)or Special varian t (max. opening pressure determined by the variant) Example: GAS 04001 T040,
valve with SAE-flanged connections dia. 40 mm in standard design with spring formax. 4.0 MPa opening pressure.
GA 1102.02 GB
