MTS Series 111 Accumulator - Manual (Page 16)

At some frequencies, fluid flow in the lines may stop completely, and overcoming the fluid inertia may become
a more significant operational factor.
An accumulator in the return line damps the pulsing effect caused by “slugs” of fluid being injected into the
line as the actuator moves. Movement of hoses or hammering of hard lines is also reduced.
3.4.0 Series 111 Accumulator Specifications
The following tables list the specifications for the Series 111 Accumulators.
Product Specifications
Model 111.12C Model 111.11B Parameter
138 MPa (20,000 psi) 83 MPa (12,000 psi) Minimum burst pressure
22 MPa (3200 psi) 21 MPa (3000 psi) Rated fatigue pressure
–40°C to 93.3°C (–40°F to 200°F) Operating temperature
Petroleum-based hydraulic fluid. Contact MTS for use with other fluids. Hydraulic fluid
Dry nitrogen Dry nitrogen
Note:
Specifications are subject to change without notice. Contact MTS Systems Corporation for verification
of specifications critical to your needs.
Capacity, Dimension, and Weight
Maxp Hydraulic
Fluid Port
Connection
B
†
A
†
Length
† Nitrogen Gas
Capacity
Model
*
kg (lbs) cm
(in.)
cm (in.) cm (in.)
4.26
(9.4) 12 SAE
(1-1/16-12
UNF-2B)
6.35
(2.5)
7.87 (3.1) 15.54 (6.12)
82 cm
3
(5 in.
3
)
111.11B-01
* The models listed in this table are considered standard models. Other models may be manufactured with
different capacities, lengths, or hydraulic fluid port connections than listed here. Contact MTS Systems
Corporation for information on nonstandard models.
† See the related cross-section figures.
‡ Standard pressure series (Code 61).
16 Series 111 Accumulator Product Information
3.0 Introduction