Roth Hydraulics, Biedenkopf, Germany, offers energy-efficient hydro accumulator solutions for systems requiring storage or conversion of hydraulic energy. These fluid technology components are used in mobile hydraulics, energy and power plant systems, industrial hydraulics, machine tools and oil and gas systems. Roth Hydraulics, formerly known as Bolenz & Schäfer, is a company with a long tradition in the hydraulics sector.
Roth Hydraulics carries the full range of hydraulic accumulator solutions, supplying a complete selection of piston, bladder and diaphragm accumulator components and systems as well as accumulator units for a variety of applications. In addition, the Roth ACCU software may be used for the sizing and design of accumulator systems and for the simulation of operational performance. The capacity of Roth accumulator systems is virtually unlimited. They have fully integrated piping and connections, all the requisite safety and monitoring devices and are certified compliant with international regulations.
With a compact and lightweight design, Roth diaphragm accumulators are suitable for industrial and mobile use up to 5,100 psi. They may be used at temperatures ranging from 31° to 176° F. Typical applications include pulsation damping, pressure peak compensation, chassis suspension and maintaining pressures in clamping and braking systems.
Different diaphragm materials will allow use of the accumulators under extreme operating temperatures and for a variety of fluids. A flexible diaphragm, secured with a metal clamping ring, separates gas and fluid. There will be no pressure difference between fluid and gas. The Roth Hydraulics diaphragm accumulators are highly efficient. They are available with specified, limited volumes and charging pressures.
Roth Hydraulics’ compact bladder accumulators are used under extreme conditions of pressures up to 690 bar and temperatures from –40° to 176° F. They are suited for damping of short-stroke, high-frequency oscillations and pressure peaks and to maintain pressure in a plant upon the loss of electrical power. The numerous advantages of the efficient bladder accumulators open up many fields of application: fast cycling, high charging and discharging frequencies and high efficiency. The low mass of the bladder enables fast response times ‒ a decisive advantage for many applications. The pressure difference between fluid and gas will be insignificant. Bladder accumulators are available in weight-optimized designs using composites. Depending on the liner and fiber materials used, weight savings of up to 70% will be possible.
Bladder accumulators are suited for use in confined spaces under difficult conditions, such as for mobile systems. Special versions — for instance with high-flow oil valves or low-friction plastic coating — render the Roth bladder accumulator an innovative product with a wide range of applications.
The Roth piston accumulators for machines and plants are available in sizes ranging from 0.026 to 396 gal. Standard equipment is available at up to 5,100 psi operating pressure and special versions range up to 17,500 psi. The charging pressure varies. They are used where high output volumes and power are needed. Depending on the area of application, auxiliary gas bottles may significantly increase capacities. Even compact, ready-to-run major plants with a total volume far in excess of 26,400 gal are available — by linking arbitrary numbers of piston accumulators and auxiliary gas bottles. The accumulator systems are suited for temperatures ranging from 14° to 176°F. They are also optionally available for duty under extreme temperatures ranging from 76° to 392°F.
Roth designs its piston accumulator fluid connections and sealing systems to suit customer requirements. No sudden loss of gas is possible to the fluid side. Low-friction sealing systems guarantee high performance and highly efficient operation. Optional extras such as incorporated stroke limitation and a large selection of measurement and monitoring instruments will provide information on the operating status and energy stored. The installed position of the piston accumulators is arbitrary.
Roth Industries GmbH & Co. KG