EPE ITALIANA s.r.l. - Viale Spagna,112 • 20093 Cologno Monzese (Mi) Italy
Tel.: +39 02 25459028 • Fax: +39 02 25 25459773 • E-mail: epeitaliana@epeitaliana.it • Internet: www.epeitaliana.it
BURST AND FUSE DISK type DR and DF
E 03-23
8.2
1
8.2.1 TECHNICAL DATA
INTERNAL DIAMETER: 8 mm
INFLUX DIAMETER: 4
MAX OPERATING PRESSURE: 400 BAR
OVERPRESSURE: 0 + 10%
WORKING TEMPERATURE: -40°C +150°C
TESTING CERTIFICATE: CE/PED (2014/68/EU)
CALIBRATION ERROR: <3%
OVERPRESSURE BY FULL FLOW: 10% of P
MATERIAL: stainless steel AISI 316L
MEDIUM: nitrogen (N2)
WEIGHT: see table 8.2c
8.2.2 DESCRIPTION
The BURST DISK is a safety device that can be mounted on the gas side
of the bladder and piston accumulators.
Its function is to protect the accumulator from any excessive pressure that
may exceed the maximum design limit of the accumulator itself causing
damages to equipment and people.
The rupture of the disk is a drastic measure; in fact you will assist to the
full release of all the contents of the accumulator (nitrogen).
Reaction to end of overpressure: it does not close, and then the disk must
be replaced.
The burst disk is composed of a properly drilled hexagonal cap in stainless
steel AISI 316L on which it is brazed a calibrated and concave membrane,
which will explode at the pre-set value. It can be installed in any position.
8.2.3 ORDER CODE
8.2.4 DIMENSIONS
8.2.5 HYDRAULIC SYMBOL
8.2.6 ACCESSORIES
For adapter, see Section 8.3
8.2.7 EUROPE MARKET
All burst disk cure the safety device Certification: CE/PED
Periodic check of calibration: is not required in accordance with Ministe-
rial Decree No. 329.
8.2.8 SIZING
Mass flow for glass (Nitrogen)
Calculation according to ISO 4126-6
Equation 6c Q= C*Kb*α*A*P*radp (M/T*Z)
Fixed setting (std) 210 bar = 210
250 bar = 250
270 bar = 270
330 bar = 330
360 bar = 360
Definitions
A = mm2 Minimum cross sectional flow area
Q = Kg/h Mass flow rate
P = bar abs Relieving pressure (=barg + 1.013)
K = Isoentropic exponent
C = Function of isoentropic exponent (=2.401 for k=1)
A = Discharge coefficient (0.62 – 0.80)
T = °K Relieving temperature
Z Compressibility factor
M = Kg/Kmol Molecular factor
Kb = Capacity correction factor for subcritical flow
Pb = bar abs Back pressure
SW24
DIN3869
8.2c
8.2a
8.2b
Series
BURST DISK= DR
Size
INTERNAL DIAM. 8 mm = 8
DR 8G2 / 360
Standard calibration
210 bar = 210
250 bar = 250
270 bar = 270
330 bar = 330
360 bar = 360
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