Hunger Hydraulic UK Ltd

HHN 816 - Tie Rod Cylinders

21 MPa/210 bar

• Piston diameters from 40 to 200 mm
• Dimensions in accordance with N.F.P.A. and ISO recommendations
• Hunger DFE seals and bearing elements
• Refined design and construction, tested in operation multiple times
• 9 bore sizes from 40 to 200 mm
• Each with 2 alternative rod diameters, from 18 to 140 mm
• 14 different mounting styles
• Ports BSP or metric
• Cylinder bores and piston rods finished honed Ra < 1 µm
• Cushioning both ends adjustable by means of throttle valves
• Check valves with air bleeds both ends
• Double ended versions available

Hydraulic Cylinders for Bridges and Ferry Ro-Ro's

Hunger have supplied many cylinders for the raising and lowering of bascule and other types of lifting bridges and also ferry vehicle Ro-Ro and passenger access platforms.

The cylinders must satisfy the highest safety demands, often operating in harsh environments.

Hydraulic Cylinders for Civil Engineering Projects

Water Level Control and Flood Protection

Hunger cylinders are used in modern dams for the positioning and control of level and flood protection gates. Cylinders for radial gates, rotary gates, slide gates and flap gates are bespoke engineered to meet the requirements of the project specifications, according to DIN and ASME standards but also regional standards where necessary and any special customer requirements. Load holding, synchronization and safety functions are incorporated into hydraulic manifold blocks directly mounted onto the hydraulic cylinders. Hunger also engineer and supply these manifold blocks together with associated power packs, thereby providing complete customer system solutions for civil engineering projects. A reference list representing decades of experience from more than 100 projects is available on request.

Ship Locks

Hydraulic drives located close to docks, rivers & canals water require high levels of reliability, corrosion protection and environmental compatibility. These requirements are fulfilled using modern piston rod coatings such as Hunger Ceraplate and Ultraplate coating, combined with special Hunger seal and guiding elements and environment friendly hydraulic fluids and by using Hunger stainless steel maintenance free spherical bearings.

Hydro Electric Power Stations

Hunger cylinders are employed in many hydroelectric power plants worldwide for the operation of turbine intake gates to control turbine speed. The cylinders must provide a reliable load holding function and must be capable of controlled interruption of the water flow at a high speed to prevent turbine breakdown.

Hydraulic Hoists/Jack-up Platforms

The Hunger portfolio includes hydraulic cylinders for scissor lifting systems, special hoisting and heavy lift platforms, used for example to raise and lower trucks for loading & offloading purposes.

Hydraulic Cylinders for Surface and Underground Mining

Hydraulic cylinders are used for surface and underground mining in the production of lignite, coal, gravel, sand and other minerals.

Hunger cylinders are used at the surface in material conveyancing systems, for example bucket wheel stacker/reclaimers.

Rotary breaker machines are used for breaking up large rocks both on the surface and underground. To avoid damage through over stressing, special Hunger damper cylinders are used to guarantee maximum reliability under extremely dirty operating conditions and high dynamic loads.

Hydraulic Press Cylinders

HUNGER hydraulic cylinders are used in forging, forming and bending presses where enormous forces of up to 10.000 t per hydraulic cylinder are required.

During the forming process hydraulic cylinders can be subjected to enormous dynamic pressure surges which can only be controlled by precise design calculations, sophisticated cylinder designs and accurate manufacturing.

Hunger supply special 12 m long cylinders with integrated oil feeds and damping systems used in special cold forming presses producing aluminium plates for aircraft construction at peak pressures up to 600 bar.

In vehicle bodywork panel production, Hunger cylinders are used in hydroforming presses where hydraulic compression forces replace the lower die. This modern forming technology places special demands on the field of high-pressure hydraulics and requires large cylinders for the clamping forces needed during the forming process.

Hydraulic Cylinders for Steel Works

Rolling Mill Hydraulic Cylinders

Hydraulic equipment is used in steelworks due to the high density of forces and its robustness. Roller adjusting cylinders for example can have piston diameters of more than 1 metre, whereby in addition to the high forces control accuracy of few hundredths of milimetres are required.

Ladle Turret Cylinders

Steel mills use ladle turret cylinders for the handling of the molten steel. Beside the high reliability and safety requirements, these cylinders have to withstand the high environmental temperatures. Since many years hydraulic cylinders prove their worth and have been produced in various scales and different types, with joint bearing, with ball joint and with con rod. The seal and bearing elements of the Hunger DFE GmbH are coordinated with the operational conditions in steel mills.

Standard Hydraulic Cylinders

• Eight types of standard cylinders including telescopic cylinders
• Pressure range from 105 bar to 350 bar
• Diameter up to 320/220 mm (Bore/Rod)
• Adjustable cushioning on both ends
• HUNGER DFE seals and bearing elements

Rotary Actuators

HUNGER manufacture single & double rack rotary actuators for applications where limited rotary motion at a constant torque is required. These highly developed actuators are manufactured in standard and special formats producing torques up to 200,000 Nm and rotary angles up to 720°.

Single Piston Rotary Actuator:

• High torques up to 50,000 Nm
• Swivel angle up to 720° with adjustable rotary angle stop and end position damping
• Single or double output shaft, keyed or splined
• Flange or foot mounting
• Rack piston sealing with Hunger slide ring seal
• Special guide lining for maintenance-free operation
• Precise control guaranteed through leak free support in all positions
• Linear or angular position sensing options

Double Piston Rotary Actuator: 

• Double piston version designed for high torques up to 200,000 Nm
• Swivel angle up to 720° with adjustable rotary angle stop and end position damping
• Single or double output shaft, keyed or splined
• Flange or foot mounting * Rack piston sealing with Hunger slide ring seal
• Special guide lining for maintenance-free operation
• Integrated rotation control unit
• Linear or angular position sensing options

Surface Coatings

Hunger Hydraulic UK Ltd offer several options to protect piston rods against corrosion and wear and provide advice on the most ideal technical & commercial solution for all applications.

Hunger Coating systems for piston rods and shafts:

• Hard chrome plating
• Chrome composite coatings
• Ceraplate® - Thermal sprayed layer.
• Ultraplate® - Plasma welding technology (P.T.A.)