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Description

Diaphragm accumulators type “AM” are pressure vessels composed of a spherical or spherical-cylindrical shaped body in 2 or 3 pieces depen- ding on its capacity. The separator of the diaphragm accumulators com- prises an elastic diaphragm.
At the centre of the diaphragm, there is a metal disk, which serves to prevent the extrusion from the oil side in the event of complete discharge of the accumulator. The separator of the accumulators type “AM” can be replaced by removing the hemispherical caps.
The diaphragm has no friction. Therefore, there is no pressure drop bet- ween the oil and gas side. The diaphragm also has a low mass inertia. Diaphragm accumulators are then preferably used as shock absorbers and pulsation dampeners in the following sectors: industrial, machine tools, furniture and agriculture.
Accumulators type “AM” have a recommended compression ratio of 1:6, which, depending on the number of cycles of the loading and unloading time can also be of 1:8 without compromising the life of the diaphragm. Losses by diffusion of diaphragm accumulators are 1 ÷ 3% per year, depending on the application characteristics.
The diaphragm may be made of different materials, so making the accu- mulators also suitable for corrosive liquids under pressure.
Compared to other accumulator types, the diaphragm ones have the highest energy density (energy content / mass). This feature is due to the spherical shape of the accumulator shell.
For the diaphragm accumulators, you can choose any type of installation. The preferred assembly is, however, the vertical one.

Technical data

MAX OPERATING PRESSURE (PS): (carbon steel) 210 – 330 bar (stainless steel) 150 ÷ 210 bar

PRESSURE TEST (PT): 1,43 x PS

NOMINAL CAPACITIES: 0,05 – 0,1 – 0,35 – 0,5 – 0,75 – 1,5 – 2,5 litres

WORKING TEMPERATURE: -40 ÷ +150 °C

COMPRESSION RATIO (Po : P2): max 1 : 6

FLUID VISCOSITY RANGE: 10 ÷ 400 cSt

RECOMMENDED VISCOSITY: 36 cSt

FLUID CONTAMINATION DEGREE:

BODY MATERIAL:

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

– carbon steel shell on painted with a black coat of rust inhibitor

– nickel coating 25 – 40 μ
– stainless steel AISI 316L
– duplex stainless steel SAF 2205

FILLING VALVE MATERIAL:

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

– stainless steel AISI 316L

DIAPHRAGM MATERIAL:

– P = Nitrile rubber (NBR)
– F = Low temp. nitrile rubber
– K = Hydrogenated nitrile (HNBR) – B = Butyl (IIR)
– E = Ethylene-propylene (EPDM) – Y = Epichlorohydrin (ECO)
– V = Fluorocarbon (FKM)

FILLING VALVE CONNECTION: FLUID PORT CONNECTION:

FLOW RATE: see table 5.1e WEIGHT: see table 5.1e

– 5/8” UNF
– M18 x 1,5
– 1/2” – 3/4” BSP ISO228 – 1/2” – 3/4” NPT-F

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