High-pressure hydraulic accumulators, piston cylinders, bladder units, safety valve blocks, and turn-key fluid power systems manufactured to ASME, CE/PED, and ISO standards.
The SCHWERLL bladder accumulator system is designed and manufactured on SCHWERLL’s proprietary production line. Upon leaving the factory, it meets stringent requirements for cleanliness, safe system integration, and compact construction. Its configuration complies with national regulatory standards for auxiliary safety components, and the complete unit undergoes comprehensive factory acceptance testing before delivery, with modularized shipment.
Piston accumulator system integration—featuring volumetric matching and hardware configuration tailored to user‑specific operating conditions in accordance with thermodynamic equations—is a standard offering from SCHWERLL. Compared with hydraulic systems or piston accumulator systems manufactured in‑house by OEMs, SCHWERLL piston accumulators boast product and system certification standards, modular delivery of the complete system, a high‑cleanliness delivery condition, and enhanced safety in the overall system design and construction details.
The SCHWERLL mobile nitrogen booster cart uses a piston accumulator for pressurization, delivering a high inflation flow rate and enabling rapid charging of large accumulator systems. Additionally, in consideration of confined working spaces and the need for mobile inflation, SCHWERLL has developed and markets the MINI‑type nitrogen booster unit.
In accordance with the accumulator standards of major countries worldwide, such as EN 14359, ASME, and TSG 21‑2016, the oil‑side outlet of an accumulator must be equipped with essential components, including shut-off valves and safety relief valves. SCHWERLL offers integrated safety and shut-off valve blocks for the oil‑side outlet of accumulators, supplied as pre‑assembled units for seamless connection. These standard valve assemblies are installed at the outlet of each bladder accumulator in the accumulator station, enabling functions such as shut-off, safety relief, hydraulic fluid inlet and outlet, and manual or electric return‑oil operation.
Accumulators, particularly accumulator systems, are required to deliver extremely high‑rate, instantaneous hydraulic flows when serving as power sources or providing auxiliary flow functions. However, measuring and controlling such transient ultra‑large flows is highly challenging. To address this, SCHWERLL has developed an integrated liquid‑side pressure‑line system with large‑diameter conduits, enabling precise control and distribution of high‑flow rates on the accumulator system’s liquid side.
SCHWERLL gas pressure piping employs components and fabrication techniques that meet stringent requirements for minimizing gas‑molecule leakage. The products utilize stainless‑steel piping, complying with the design and manufacturing standards for gas pressure pipelines in China and in the countries where they are installed, including adherence to the TSG‑D0001 standard for metallic pressure pipelines (covering design and fabrication requirements for pressure pipelines with diameters of 50 mm or greater).
Based on a modular design, the overall volume (V0) of the piston accumulator system can be unlimited. To meet extremely high flow‑rate requirements under specific operating conditions—such as reducing the installed power of the host equipment and achieving energy savings—it is necessary to perform calculations and system matching using gas thermodynamic equations. SCHWERLL’s large‑capacity piston accumulator systems can deliver a single unit with a total volume of 100,000 liters or more. SCHWERLL ensures the supply of high‑quality, large‑scale piston accumulators through its proprietary design capabilities, in‑house facilities for constructing large systems, and comprehensive testing infrastructure.
Based on emergency operating requirements—such as the emergency actuation of hydraulic‑turbine governor servomotors, or the emergency closing of chemical‑process and hydropower inlet valves and circuit breakers when power is lost—the accumulator system serves as the system’s emergency power source. As an emergency power source, its fundamental operational characteristics must ensure that the energy stored in the accumulator remains under monitored, guaranteed‑operation conditions. Particularly in high‑pressure applications—e.g., when system pressure is ≥9 MPa—a piston‑type accumulator system equipped with an energy‑monitoring device is the required choice.
For equipment where, due to cost or installation-space constraints, it is not feasible to install a piston‑type accumulator (servo cylinder) level‑monitoring device, when operating conditions require monitoring the energy stored in the accumulator (or the system), or when maintenance and servicing necessitate detecting the piston position within the piston‑type accumulator to measure the fluid level, an ultrasonic position‑sensing device manufactured and supplied by SCHWERLL can be employed. This device enables precise measurement of the piston‑side fluid level without disrupting the equipment’s operational status; the sensing is performed through a metal housing, with the metal wall thickness tolerating up to 35 mm on a single side.
Xivier manufactures a comprehensive range of nitrogen‑inflation tools, featuring high‑flow, dedicated gas pressure hoses with built‑in piercing fittings, and compatible with standard nitrogen cylinder connectors used in major countries and regions worldwide.
