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Pressure relief valve DN3-DN6 PN350

  • Operating pressure: 350bar
  • Nominal size(s): DN3, 6
  • max. Flow rate: 30l/min

Features

  • Directly actuated pressure relief valve
  • Seat valve with a leak-free, metallic conical seat seal
  • All parts are made of corrosion-resistant materials, and they are easily replaceable
  • Compression spring as a preload element
  • Attachment, structural plate form with a Hauhinco connection diagram

Funktion

Pressure relief valve for the primary pressure setting at the hydraulic pumps and the pressure protection of the hydraulic drives and hydraulic components.

In the basic valve position, the power of the compression spring (3) acts on the valve piston (2) and transfers it to the valve seat (4). The valve seat (4) and the valve piston (2) form the valve seal at the conical surface. By turning the adjusting nut (5) the compression spring (3) is preloaded and the desired set pressure “Pe” set. The adjusting nut (5) can be fixed using the lock nut (6).

Within the operation of the valve, the system pressure „Ps“ enters the valve body (1) at the P-connector and generating a hydraulic (opening) force at the valve seat area of the valve piston (2). The force of the compression spring (3) maintains the valve piston (2) in the shut off basic position as long as the hydraulic opening force is < than the set closing force of the spring. If the system pressure „Ps“ increases to the extent that the force ratio reverses to be opening force > closing force, then the valve piston (2) is pressed out of the basic position, lines P and T are connected thus opening the valve. The valve opening increases proportionally with increasing system pressure until the maximum admissible volume fl ow for the valve has been reached, see valve characteristic.

 

Technical data

measured with HFA medium 97/3%, at 20°C

General

WeightDN3 1,3kg
DN6 2,4kg
Installation positionany
Ambient temperature-10 to 50°C (hydraulic fl uids, heed standard requirements)
Material Valve parts
Material Seals		Stainless steel, bronze
NBR, PTFE, PUR

Hydraulic

hydraulic pressure connector P<= 350bar
hydraulic pressure connector T<= 50bar (observe counterpressure within the pressure setting)
Setting range of hydraulic response pressure Pesee Order information
max. volume fl owDN3 8 l/min
DN6 30 l/min
specifi ed direction of fl owP->T
Pressure fluid
- Medium - Temperature range
- Medium - Quality
- min filter fineness		Water, HFA
5 bis 40°C
see Hauhinco media requirement, water, HFA
Filter fineness 100µm
Pressure fl uid
- Medium - Temperature range
- Medium - Quality		Mineral oil HLP according to DIN51624-2
5 to 50°C
Cleanliness class -/19/16 according to ISO 4406
Use of other pressure fl uids on request.

Included in the scope of supply

Mounting screws for the valves
Pressure setting according to customer specifi cation
Factory test certifi cate on request

Versions

DescriptionNominal sizeWeightMax. pressureBasic positionVoltageNoteArticle number
Pressure relief valve DN3DN31,3kg350--Einstellbereich 20-160bar6246354
Pressure relief valve DN3DN31,3kg350--Einstellbereich 150-340bar6246362
Pressure relief valve DN6DN62,4kg350--Einstellbereich 20-155bar6247679
Pressure relief valve DN6DN62,4kg350--Einstellbereich 145-275bar6248714
Pressure relief valve DN6DN62,4kg350--Einstellbereich 270-340bar6248722
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Hauhinco Maschinenfabrik GmbH & Co. KG
Beisenbruchstraße 10
45549 Sprockhövel
Germany

Phone.: +49 2324 705-0
Fax: +49 2324 705-222 
sales@hauhinco.de

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With our decades of know-how in water hydraulics, we at Hauhinco have core competences in the mining sector and in a number of industrial applications.

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