Tradition and innovation go hand in hand at Hauhinco. Founded in 1908 in
Sprockhövel, Germany in the cradle of Ruhr mining, Hauhinco has remained
true to its roots – up to the present time. For over 100 years, the company
has adapted to many changes in structure and circumstances and continually
brought new, innovative products onto the market. This experience makes
Hauhinco unique in the market place.
Unsere technische Abteilung entwickelt kundenspezifische Wasserhydraulik-Lösungen und setzt mit ausgeprägtem Projekt Know-How, Kundenwünsche und Anforderungen exakt um.
Hauhinco is represented in a large number of industries with water hydraulic components and fluid system solutions.
Whether high pressure pump station or water spray pump station, with or without water treatment, we manufacture certified pump systems with all the necessary approvals for underground mines all over the world.
The increasing quality requirements of steel, stainless steel, copper and forged products simultaneously increase the requirements for the descaling process.
Along with control blocks (controls, manifolds), control technology and modular fluid systems, valves are among the most important components in water hydraulic installations.
The Hauhinco Service supports our customers all over the world with the commissioning, maintenance and repair of our high pressure plunger pumps, valves and water hydraulic systems as well as with the spare part identification and supply.
Hauhinco is a successful, medium-sized family business with a long tradition. Today the company is a leading provider in the area of water hydraulic applications. Our high pressure plunger pumps, valves and systems are used in underground in underground mining and industry all over the world. Our employees are the key to success.
Hauhinco has contact persons and representatives in all Mining and Industrial regions of the world.
Africa, Australia, Bosnia and Herzegowina, Bulgaria, China, Croatia, England, Finland, France, Germany, India, Iran, The Netherlands, Norway, Poland, Russia, Switzerland, Slovenia, Spain, Turkey, Ukraine, USA
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 hydraulic power of the hydraulic accumulator (7) acts on the piston valve (4) and transfers it to the valve piston (3). The valve seat (2) and the valve piston (3) form the valve seal at the conical surface. On the gas side, the hydraulic accumulator (7) has been prefi lled with nitrogen and is preloaded hydraulically with the pressure setting on the liquid-side until the requested pre-set pressure „Pe“ is reached. The gas within the accumulator is compressible and acts as a fl exible spring
Within the operation of the valve, the system pressure „Ps“ enters the valve body (1) at the P-connector generating a hydraulic (opening) force at the valve seat area of the valve piston (3). The piston valve (4) maintains the valve piston (3) in the shut o basic position as long as the hydraulic opening force is < than the closing force at the piston valve (4). If the system pressure „Ps“ increases to the extent that the force ratio reverses to be opening force > closing force, then the valve piston (3) 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
The pressure of the valve is set via the adjustment valves (5, 6). Thus, the pressure of the accumulator (7) is set. Depending on the pressure setting of the accumulator a hydraulic power is generated, which is transferred to the valve piston (3). From the control ratio „SK“ (see Technical data) and the pre-set pressure „Pe“ follows the required accumulator pressure „Pap“.
General | |
Weight | DN3 1,3kg DN6 2,4kg |
Installation position | any |
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, M | ≤ 400 bar bzw. ≤ 500bar, see Order information |
hydraulic pressure connector T | <= 50bar (observe counterpressure within the pressure setting) |
Setting range of hydraulic response pressurePe | DN20: 30 – 450 bar DN25: 30 – 500 bar |
Control ratio Sk | DN20: 1:1,9 – 2,20 (area piston valve/valve piston) DN25: 1:2,0 – 2,22 (area piston valve/valve piston) |
Pressure range accumulator PSp | 14 – 260 bar |
max. volume flow | DN20 500 l/min DN25 700 l/min |
direction of flow | P->T |
Pressure fluid - Medium - Temperature range - Medium - Quality - min fi lter fi neness | Water, HFA 5 bis 40°C see Hauhinco media requirement, water, HFA Filter fi neness 100µm |
Pressure fluid - Medium - Temperature range - Medium - Quality | Mineral oil HLP according to DIN51624-2 5 to 50°C Cleanliness class -/19/16 according to ISO 4406 |
Optional features | Pressure display „PSp“, see order data |
Use of other pressure fl uids on request. | |
Included in the scope of supply | |
Mounting screws for the valves | |
Pressure setting according to customer specification | |
Factory test certificate on request |
Description | Nominal size | Weight | Max. pressure | Basic position | Voltage | Note | Article number |
---|---|---|---|---|---|---|---|
Pressure relief valve U504 | DN20 | 22,0kg | 400 | - | - | Einstellbereich 30-400bar | 6159362 |
Pressure relief valve DN20 | DN20 | 16kg | 500 | - | - | Einstellbereich 30-450bar | 6261981 |
Pressure relief valve DN20, with pressure display | DN20 | 16,0kg | 500 | - | - | Einstellbereich 30-400bar | 6392660 |
Pressure relief valve DN20, with pressure display | DN20 | 16,0kg | 500 | - | - | Einstellbereich 30-250bar | 6267092 |
Pressure relief valve DN20 | DN20 | 30,0kg | 500 | - | - | Einstellbereich 30-500bar | 6167861 |
Pressure relief valve DN25, with pressure display | DN25 | 30,5kg | 500 | - | - | Einstellbereich 30-400bar | 6272673 |
Hauhinco Maschinenfabrik GmbH & Co. KG
Hölterstraße 51
45549 Sprockhövel
Germany
Phone.: +49 2324 705-0
Fax: +49 2324 705-222
sales@hauhinco.de
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.