 |
The ECO-SAF
System |
The ECO-SAF
System
The type
ECR reverse buckling Compression Loaded Style Disk provides over pressure
relief in either gas/vapor or liquid application. The ECR disk is designed
with a perforated circular score in the perimeter of the dome. Gaskets
which are activated by assembly of safety head, cover the perforated score
line to achieve a sealed construction. The snap action of reverse buckling
disk technology enables very low burst pressures to be achieved avoiding
the use of weaker slotted composite disk designs .At the disks burst
pressure the disk reverse, opening along this perforated score line,
relieving the overpressure.
Applications
- Overpressure protection at the lowest available reverse buckling
burst pressures.
- Prevent fugitive emission from API storage vessels. The ECR disk
may be installed below the emergency fire vent. Isolating the vent and
eliminating leakage of the stored fluid. The vessels normal breathing
vent will continue to operate.
- Relief valve isolation, an ECR disk may be installed at the inlet
of a safety relief valve offering the following benefits:
- Reduces fugitive emissions.
- Less
expensive valve trim may be used in corrosive applications.
- Valve
life is extended by isolating valve parts from corrosive fluid.
Features
& Benefits
- Sizes
from 1" (25 mm) to 24 " (600 mm)
- Lowest burst pressure in a reverse buckling style disk.
- Designed to be non-fragmentation.
- Overpressure relief for either gas /vapor or liquid
applications.
- Suitable for operation pressures up to 90% of the minimum burst
pressure.
- High
performance in pressure cycling or pulsating conditions.
- If
installed damaged, disk will burst at the nominal burst pressure.
- Back
pressure resistance from 0.5 and up to 2 times tagged burst pressure
subjected to process conditions
- Vacuum resistance. (May require additional vacuum
support.)
- Low
torque sensitivity
- Disk
acts as a positive seal to prevent fugitive emissions.
- Smooth convex disk surface suitable for hygienic or
polymerization applications.
- Ideal
for relief valve isolation.
- Standard materials, Nickels, Alloys 200, Monel Alloy, Inconel
Alloy 600, 316SS, Hastelloy C-276 and Tantalum.
- Patent No: 5,368,180, 5,413,237, and 4,751,938.
The ECR
disk is a low-pressure reverse buckling disk designed with perforated
circular score in the perimeter of the dome. When overpressure occurs, the
disk reverses and opens along the perforated score line and folds around
the pivot in the outlet of the Safety head. The pivot ensures that the
disks petal is retained after
rupture.
Operating
Ratio
A 90%
operating ratio allows the process to operate up to 90% of the maximum
burst pressure without affecting the disks service life.
*Ratio of
operating pressure to burst pressure.
Materials
The ECR
disks are available in 316SS, Nickel Alloy 200, Monel Alloy 400 and
Inconel Alloy 600, Hastelloy C-276 or Tantalum. The standard gasket
materials are Buna N, Viton and FEP/PTFE.
(Consult BS&B for
alternatives.)
Pressure
Cycling & Pulsating Service
The ECR
disk will have a superior life in pressure cycling or pulsating
conditions.
Vacuum or
Back Pressure Rating
The
vacuum or backpressure resistance capability is from 0.5 and up to 2 times
the disks vacuum or backpressure resistance, rating should be specified
when ordering. If required, an integral vacuum support for vacuum may be
supplied with disk type ECV. The resultant flow capacity will be reduced
by up to 16% (consult BS&B).
Non-Fragmenting
The type
ECR disk is designed to be non-fragmenting on rupture.
Operating
Temperatures
The
operating temperature range is dependent on the choice of the integrated
gasket seal materials.
Gaskets
The
disks are supplied with gaskets attached to both sides of the
disk.
| Gasket Seal
Material |
Temperature
Range |
| Buna
N |
-60°F to
230°F -51°C to
110°C |
| Viton |
-50°F to
400°F -46°F to 204°C |
| FEP/PTFE* |
-50°F to 400°F -46°C to
204°C |
*Process
side of disk
Low Damage
Ratio
If a
disk is accidentally damaged before or during installation, the disk will
burst at a pressure not exceeding its tagged burst pressure in the reverse
buckling direction.
Sanitary
& Aseptic Applications
Eco –
Saf rupture disks (bursting discs), in non-contaminating materials, presenting a smooth
disk surface towards the process are ideal for sanitary and aseptic
applications. The disk’s sanitary gasket provides a leak tight seal when
installed in its holder Type ER-C and secured by standard sanitary
clamps.
Type
ECR-S provides vacuum relief with full opening and positive pressure
resistance from 0.5 and up to 2 times marked burst pressure subject to
process conditions.
Type
V/ECR-S provides overpressure relief with full opening and vacuum/back
pressure resistance from 0.5 and up to 2 times marked burst pressure
subject to process conditions.
Type
V/ECT-S is an inverted two-way disk providing both vacuum and overpressure
relief. The disk is suitable for operating pressures up to 90% of the
minimum vacuum burst pressure, and up to 70 % of the burst pressure in the
overpressure direction. Full opening in overpressure relief, and up to 16%
reduction in flow capacity in vacuum relief.
Low Reversal
Ratio
If a
type ECR or V/ECR disk and holder is accidentally installed in the wrong
direction, the disk will burst at a pressure between 0.5 and 2.0 times its
burst pressure. The maximum reversal pressure may be specified when
ordering.
Manufacturing
Range
A
manufacturing range of 0%, 5% or 10% is available and is applied to the
minus side of the requested burst pressure. A disk with a requested burst
pressure of 3 psig( 0.21 barg) and a 10% manufacturing range will be
marked at a burst pressure between 2.7 psig (0.19 barg) and 3 psig ( 0.21barg ). A disk with a 0% manufacturing range will be marked at
the requested burst pressure.
Tolerance
The
burst tolerance is the maximum variation from the marked burst pressure.
Each disk will be additionally marked with both minimum and maximum burst
pressure.
| Marked
Burst Pressure |
Tolerance |
| 5 psig
(0.34 barg) and above |
+/-
10% |
| Less than 5
psig (0.34 barg) |
+/-
15% |
Other Disk
Types
The
V/ECR and V/ECV are inverted styles of the types ECR and ECV rupture disks (bursting discs)
for very low burst pressure in the case of vacuum relief.
- Type
V/ECR provides vacuum relief with full opening and positive pressure
resistance from 0.5 and up to 2 times the marked burst pressure subject
to process conditions.
- Type
V/ECV provides vacuum and is supplied for relief with positive pressure
support on the vent side. This support offers positive pressure
resistance and up to 16% reduction in flow capacity.
Type ECT
is a two-way disk providing both overpressure and vacuum relief. The disk
is suitable for operating pressures up to 90% of the minimum burst
pressure in the overpressure direction and up to 70 % of the burst
pressure in the overpressure direction. Full opening in vacuum relief and
up to 16% reduction in flow capacity in overpressure relief. Sizes 2" to
6".
Type
V/ECT is an inverted two-way disk providing both vacuum and overpressure
relief. The disk is suitable for operating pressures up to 90% of the
minimum vacuum and up to 70 % of the vacuum rating. Full opening in
overpressure relief and up to 16% reduction in flow capacity in
overpressure relief. Sizes 2" to 6".
Rupture Disk (Bursting Disc)
Sensor
An
EC-Alert sensor provides immediate warning of a ruptured disk when used
with a BS&B Burst Disk Monitor or other suitable electrical monitoring
equipment. The EC-Alert sensor is available for all disk types including
the two-way ECT type.
Safety
Heads
| Disk
Type |
Safety Head
Type |
| ECR,
ECV |
EC-7RS,
EC-7R |
| ECT |
EC-7RS(1) |
| V/ECR,
V/ECV |
VEC-7RS,
VEC-7R(2) |
| V/ECT |
VEC-7RS(1) |
| ECR-S |
ER-C(3) |
| V/ECR-S |
VER-C(2)(3) |
| V/ECT-S |
VER-C(1)(3) |
(1)
Ensure flow arrows on the Safety Head point in the desired flow direction
upon disk rupture.
(2)
Types EC-7RS, VEC-7RS are pre torquable safety heads. Types EC-7R and
VEC-7R are " spool " design safety heads and are installed in the process
by clamping between standard pipe flanges (ANSI, DIN, JIS and
API)
For
holder dimensions refer to catalog 77-4015, Page 7, and holder type SR-C
(3)
Type EC-7RS Safety
Head (Sizes 1 – 24 Inches)
The ECR
disk may be installed in the EC-7RS safety head and the cap screws torque
to provide the correct load on the disk on the workshop before
installation in the process. The pretorquable feature minimizes the
possibility of process leakage or permanent disk failure due to incorrect
torque.
Asymmetric locating pins center the disk in the safety head
ensuring the correct direction of the disk installation.
Application of the correct integral cap screw torque activates the
disk integral gasket to achieve bubble tight construction. The safety head
is designed with a unique metal-to-metal stop, preventing over torquing
and consequential damage to the disk. Flow arrows indicate the direction
of the process flow during venting. The EC-7RS Safety Head may be removed
from service, inspected and re-installed without affecting the rupture
disk’s burst pressure provided the cap screws are not loosened.
The
safety head is designed to fit inside NSI, DIN and JIS pipe flange bolting
patterns and is made from 316SS, Carbon Steel, Aluminum, Alloy 400, Alloy
600, Hastelloy C-276. Alternate materials may be
requested.
EC-7RS
Safety Head Specifications
|
Nominal Size
|
Safety Head Flange Rating
|
Safety Head Thickness A
|
Dimensions
X
Y |
|
Inches
|
mm
|
ANSI
|
DIN
|
JIS
|
Inches
|
mm
|
Inches
|
mm
|
Inches
|
mm
|
|
1
|
25
|
150
|
-
|
-
|
1.34
|
34
|
2.63
|
67
|
2.63
|
67
|
|
1
|
25
|
300/600
|
6/10/16/25/40
|
10/16/20/25/40
|
1.34
|
34
|
2.88
|
73
|
2.88
|
73
|
|
1.5
|
40
|
150
|
-
|
10/16/20
|
1.52
|
39
|
3.38
|
86
|
3.38
|
86
|
|
1.5
|
40
|
300/600
|
6/10/16/25/40
|
30/40
|
1.52
|
39
|
3.75
|
95
|
3.75
|
95
|
|
2
|
50
|
150/300/600
|
6/10/16/25/40
|
10/16/20/30/40
|
1.70
|
43
|
4.13
|
105
|
4.13
|
105
|
|
3
|
80
|
150/300/600
|
6/10/16/25/40
|
16/20/30/40
|
2.08
|
53
|
5.25
|
133
|
5.25
|
133
|
|
3
|
80
|
-
|
-
|
10
|
2.08
|
53
|
4.75
|
121
|
4.75
|
121
|
|
4
|
100
|
150/300
|
6/10/16/25/40
|
16/20/30/40
|
2.70
|
69
|
6.25
|
159
|
6.25
|
159
|
|
4
|
100
|
-
|
-
|
10
|
2.70
|
69
|
Flower Petal
|
|
4
|
100
|
600
|
-
|
-
|
2.70
|
69
|
7.63" OD/194mm OD
|
|
6
|
150
|
150/300
|
6/10/16/25/40
|
10/30/40
|
3.44
|
87
|
Flower Petal
|
|
6
|
150
|
-
|
-
|
16/20
|
3.44
|
87
|
Flower Petal
|
|
6
|
150
|
600
|
-
|
-
|
3.44
|
87
|
10.38" OD/264 mm OD
|
|
8
|
200
|
150/300
|
-
|
-
|
3.71
|
94
|
Flower Petal
|
|
10
|
250
|
150/300
|
-
|
-
|
5.80
|
147
|
Flower Petal
|
|
12
|
300
|
150
|
-
|
-
|
5.80
|
147
|
16" OD/406. mm OD
|
|
12
|
300
|
300
|
-
|
-
|
5.80
|
147
|
16.50" OD/419 mm OD
|
|
14
|
350
|
150
|
-
|
-
|
6.15
|
156
|
17.75" OD/451 mm OD
|
|
14
|
350
|
300
|
-
|
-
|
6.15
|
156
|
19" OD/483 mm OD
|
|
16
|
400
|
150
|
-
|
-
|
7.40
|
188
|
20.125"OD/511mm OD
|
|
16
|
400
|
300
|
-
|
-
|
7.40
|
188
|
21.125" OD/536 mm OD
|
|
18
|
450
|
150
|
-
|
-
|
8.10
|
206
|
21.5"OD/546 mm OD
|
|
18
|
450
|
300
|
-
|
-
|
8.10
|
206
|
23.38" OD/594 mm OD
|
|
20
|
500
|
150
|
-
|
-
|
8.84
|
225
|
23.75" OD/603 mm OD
|
|
20
|
500
|
300
|
-
|
-
|
8.84
|
225
|
25.63"OD/651 mm OD
|
|
24
|
600
|
150
|
-
|
-
|
10.28
|
261
|
28.13" OD/714 mm OD
|
|
24
|
600
|
300
|
-
|
-
|
10.28
|
261
|
30.38" OD/771.5 mm
OD
|
Type EC-7R Safety
Head (Sizes 1 – 24 Inches)
This is
a spool design to fit regular light duty ANSI, DIN, JIS and API flange
systems for low-pressure service. Asymmetric locating pins center the disk
in the safety Head, and ensure correct direction of disk installation .The
EC-7R Safety Head has three flange connections, one at the center where
the ECR disk is installed, one at the inlet, and one at the outlet flange.
On installation of the safety head assembly between pipe flanges,
application of the correct torque to the flange bolts activates the disk’s
gasket to achieve a seal. The safety head is designed with metal-to-metal
stop to prevent over torquing and consequential damage to the disk. Flow
arrows indicate the direction of flow during process venting.
When the
disk ruptures, the petal is fully contained within the EC-7R Safety Head
outlet. This eliminates interference with downstream vents or
instrumentation. Eyebolts are available for ease of manipulation of the
Safety Head, especially useful for larger sizes.
The
EC-7R Safety Head is available in 316SS, Carbon steel, Aluminum or
composite low mass material. Alternate materials may be
requested.
EC-7R Safety
Head Specifications
|
Nominal Size
|
Outside Diameter A
|
Safety Head Height B
|
|
ANSI 150
|
DIN 16
|
|
Inches
|
mm
|
Inches
|
mm
|
Inches
|
mm
|
Inches
|
mm
|
|
1
|
25
|
2.5
|
64
|
2.8
|
71
|
2.38
|
60
|
|
1.5
|
40
|
3.25
|
83
|
3.62
|
92
|
3.00
|
76
|
|
2
|
50
|
4.0
|
102
|
4.21
|
107
|
4.00
|
102
|
|
3
|
80
|
5.25
|
133
|
5.59
|
142
|
5.13
|
130
|
|
4
|
100
|
6.75
|
172
|
6.38
|
162
|
6.25
|
159
|
|
6
|
150
|
8.63
|
219
|
8.54
|
218
|
8.68
|
220
|
|
8
|
200
|
10.88
|
276
|
10.71
|
273
|
11.30
|
287
|
|
10
|
250
|
13.25
|
337
|
12.91
|
327
|
14.00
|
355
|
|
12
|
300
|
16.00
|
406
|
15.08
|
383
|
16.75
|
425
|
|
14
|
350
|
17.63
|
448
|
17.44
|
443
|
18.62
|
473
|
|
16
|
400
|
20.13
|
511
|
19.49
|
495
|
21.35
|
542
|
|
18
|
450
|
21.50
|
546
|
21.85
|
555
|
24.00
|
610
|
|
20
|
500
|
23.75
|
604
|
24.29
|
617
|
26.75
|
679
|
|
24
|
600
|
28.13
|
714
|
28.9
|
734
|
32.00
|
813
|
|
