37
STRACK NORMA GmbH & Co. KG · Königsberger Str. 11 · D-58511 Lüdenscheid · Tel +49 2351 8701-0 · www.strack.de
08.2018
I
Operating instructions -- PowerMax
cam unit PMU
Power
Max
PowerMax cam unit SN5650-PMU-0330
—
SN5650-PMU-1200
15.3
Maximal operating conditions for gas springs
Series number
Manufacturer
Model
Max. loading pressure
(97/23/CE)Marking
Identification
All
STRACK
gas springs are clearly identified by means of a consistent en-
graving on the body in accordance with the specification of the European
norm (97/23/CE).
Working stroke
The working stroke is maintained invariable during use thanks to a
mechanical stop. All
STRACK
gas springs can work using the whole
of their nominal stroke (S) as all models have a stroke reserve.
How-ever, in order to reach an optimal service life, it is convenient to
design with an optimal safety level. It is therefore recommended to
foresee a 10 % stroke reserve. (picture 1)
Working temperature
Maximum working temperature is 80°C. Higher temperatures can dama-
ge the gastightness elements, and seriously affect the length of the gas
spring service life. (picture 2)
Maximum filling pressure
You should never go over the maximum loading pressure for each gas
spring, which is between 150 and 175 bar (at 20°C) depending on each
model. Maximum loading pressure is detailed in each model’s technical
specifications.
Maximum working speed
Maximum lineal working stem speed is variable depending on the type
of gas spring. Maximum working speeds are detailed in each model’s
technical specifications.
Maximum rate
The calculation of maximum rate per minute (N) is calculated following
this formula:
N =
_________
picture 1
picture 2
K
(2 x S) + 50
K
= Calculation coefficient
(values detailed in the technical
specifications for each model)
S
= Working stroke
