Hydraulic Piston Accumulators

Technical Information

Piston Accumulators | Bosch Rexroth 3

Introduction

Piston accumulators by Bosch Rexroth are applied in various applications in different industries. As these products are always engineered-to-order and customer specific, Bosch Rexroth is able to meet all of your needs and demands.

Contents

02 Introduction

02 Technical details

02 Certification

02 Preservation & Oil

04 Standard dimensions

05 Measuring system

05 Mounting

07 Inquiry list

Technical Key Data

• Standard piston diameters 360 and 500 mm

• Length: variable up to 5,500 mm• Operating temperatures: -20°C / +60°C• Maximum piston speed 3,500 mm/sec• Maximum pressure: 220 bar• Certification: CE. Other certificates

possible on request• V46 or V68 mineral oils with cleanliness

ISO 4406 18/16/13 (NAS 1638 class 7)• Nitrogen purity degree 4.0. 99,99%

by volume• Seal friction <1 bar

Certification

Bosch Rexroth piston accumulators can comply with most applied safety regulations and guidelines as we have extensive experience with different certifying authorities. Standard the piston accumulators are CE certified.

Preservation & Oils

For short term storage of the piston accumulators, the cylindrical jacket is filled with nitrogen gas (pressure 1,15 bar at room temperature). After installation the piston accumulator can be filled with a wide range of mineral oils, depending on the application. Other types of hydraulic fluids are optional.

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diameter 360 mm

diameter 500 mm

Modular selectable indication and monitoring devices

The measuring device for indication of the position and movement of the piston are mounted on the outside of the accumulator. This optional device is clearly readable and easily accessible.

PED Table and categories

All accumulators mentioned in this technical information document are category IV according to the PED table.

The X-axis shows the accumulator volume in liters. The Y-axis shows the design pressure in bar. The demarcation lines in the conformity assessment table indicate the upper limit for each Category I to IV.

The product of the design pressure and the accumulator volume is calculated and compared to the demarcation lines. The category above one of the lines is the applied category. If the product of pressure and volume is lower than 50 (i.e. the first demarcation line) the PED is not applicable.

Mounting kit

Standard dimensions and technical drawings

• Visual indication device• Analog level measurement, 4 – 20mA

over the complete stroke• Magnet switches, switching capacity up to 220VDC• Nitrogen filling device with gas-safety valve

or fusible safety plug• Control block with type-tested safety valve

on the accumulator (CE certificate)

◀ If placed vertically, ◀ this side up.

◀ If placed vertically, ◀ this side up.

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Mounting and mounting devices

The accumulators are fit for horizontal and vertical mounting. Standard mounting devices are available for accumulators with bores 360 and 500 mm.

Technical inquiry - data

General information

Quantity

Max. heigth mm

Piston diameter 360 mm 500 mm

Country of installation

Code certifications CE ASME* Other

Application

Standard Sizing Information

System working pressure bar min. bar max.

Gas pre-charge pressure bar min. bar max.

Required fluid volume liter

Required gas volume liter

Discharge time s

Charge time s

Ambient temperature °C min. °C max.

System operating temperature °C min. °C max.

Number of cycles per day

Custom Design Specifications

Position measuring system without 4-20 mA 0-10 V SSI

Radial proximity switch fluid end gas end

Installation position horizontal vertical

Hydraulic operating fluid** HL (HLP) HEES other

Gas medium** nitrogen other

Additional comments

Notes: * Optional ASME U, U2 or U3 stamp/certification available. ** Other combinations of fluid and gas mediums are possible.

- Alternative designs and sizes are possible on request. - The exterior of the piston accumulator is coated with a basic primer. Additional preservation systems are available on request.

Example type plate:

220 315 -20 +60

The data specified above only serves to describe the product. As our products are constantly being further developed, no statement concerning a certain condition of suitability for a certain application can be deceived from our information. The information given does not release the user from the obligation of own judgment and verification. It must be remembered that out products are subject to a natural process of wear and aging.

© Bosch Rexroth BV - RE PA Edition 2016-03

Bosch Rexroth B.V.Postbus 325280 AA Boxtel Kruisbroeksestraat 15281 RV BoxtelThe NetherlandsTel. +31 411 65 1951 Fax +31 411 65 1483 www.boschrexroth.nl large.hydrauliccylinders@boschrexroth.nl