Large volumes ASE type

Description

ASE Bladder-type accumulators consist of a cylindrical pressure vessel made of high-tensile steel.
The accumulator is subdivided into a gas and fluid side by an elastic bladder mounted in the interior of the vessel.
The nitrogen is charged to the specified gas charge pressure P0 by means of gas valve at the external of the bladder.
When the fluid is pressed into the bladder, the gas in the accumulator is compressed and hence the pressure increased. The gas volume reduces and on the fluid side, the fluid can flow into the bladder. As soon as the pressure on the fluid side falls below the gas pressure, the accumulator is emptied.
A special oil valve (anti-extrusion plate) is provided in the oil port in order to prevent draining of the bladder into the oil channel and thus the bladder from being destroyed.
When the minimum operating pressure is reached, a small oil volume is to be maintained between the bladder and the fluid volume (approx. 10% of the nominal capacity of the hydraulic accumulator), in order that the bladder does not hit the valve during every expansion process.
Gas valve consists of a sealing cap, a filling valve and an adapter.
The nameplate shows the technical data and features of the hydraulic accumulator.

Technical data

MAX OPERATING PRESSURE (PS): 16 bar PRESSURE TEST (PT): 1.43 x PS

NOMINAL CAPACITIES: 100 – 150 – 200 – 300 – 500 – 750 – 1000 – 1500 – 2000 – 3000 – 4000 – 5000 litres

WORKING TEMPERATURE: -30 ÷ +100 °C COMPRESSION RATIO (Po : P2): max. 1 : 4 FLUID VISCOSITY RANGE: 10 ÷ 400 cSt RECOMMENDED VISCOSITY: 36 cSt FLUID CONTAMINATION DEGREE:

class 21/19/16 according to ISO 4406/99

BODY MATERIAL:

– carbon steel shell painted with rust inhibitor RAL 5015 up to 1500 er;
RAL 9010 for capacities from 2000 lt to 5000 lt

– stainless steel AISI 316L

VALVES MATERIAL:

– phosphated or galvanized carbon steel in compliance with Directive 2002/95/EC (RoHS) to resist to corrosion

– stainless steel AISI 316L

BLADDER MATERIAL:
– P = Nitrile rubber (NBR)

– B = Butyl (IIR)

– E = Ethylene-propylene (EPDM) See Table 3.6c and/or Chapter 1.5

FILLING VALVE CONNECTION:

– 5/8”-UNF std – 7/8” UNF
– 1⁄4” BSP