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
The pump unloader valve, and the pilot valve form a valve unit controlling a pump in a pressure supply system with a pressure accumulator. Depending on the system pressure, the valve controls the working cycle of the pump, „pressure build up“, „load accumulator“ or „depressurised bypass“. The P-connector is connected to the pressure port of the pump, the A-connector to the pressure line of the system and the T-connector to the pressure-free tank.
The flow of the pump enters the pump unloader valve at the P-connector. The pump flow is connected to the pressure port of the pilot valve (1) via the filter (5). In the circulation position, the control piston (3) of the 2/2-way valve (2) is pressure-relieved on the control side, the 2/2- way valve is open and the pump fl ow is pressureless discharged from P to T. By switching over the pilot valve (1), the piston (3) is pressurized on the control side and the 2/2-way valve (2) closes and blocks the connection P to T. At the same time, the check valve (4) opens and connects the lines P to A. The pump fl ow is supplied via the A connection to the system.
General | |
Weight | see Order information |
Installation position | any |
Ambient temperature | -10 to 50°C (hydraulic fl uids, heed standard requirements) |
Material Valve parts Material Seals | Stainless steel NBR, PTFE, PUR |
Hydraulic | |
<h4Pump unloader control DN40, PN420 | |
Hydraulic pressure connector P, A, MA | ≤ 420 bar |
Hydraulic pressure connector Y | ≤ 2 bar |
Hydraulic pressure connector | ≤ 2 bar |
Direction of flow | P→T, P→A |
Pressure fluid - Medium - Temperature range - Medium - Quality - min. filter fineness connection P, A - min. filter fineness Pilot control valve | Water, HFA 5 to 40°C see Hauhinco media requirement, water, HFA Filter fineness 100µm Filter fineness 25µm |
Pressure fluid - Medium - Temperature range - Medium - Quality - Viscosity | Mineral oil HLP according to DIN51624-2 5 to 50°C Cleanliness class -/19/16 according to ISO 4406 0.6 up to 100 mm2/s |
max. switching rate of the valve unit | 0,2 Hz |
Use of other pressure fluids on request. | |
Note: The maximum decrease volume flow of the consumer and the size of the pressure accumulator control the switching rate of the pump circulation control system. |
Description | Nominal size | Weight | Max. pressure | Basic position | Voltage | Note | Article number |
---|---|---|---|---|---|---|---|
Pump unloader control | DN40 | 65 - 134.7 | 420 |
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.