ECV™ Reverse Buckling Rupture Disk

Vacuum Resistant Low Pressure Rupture Disk for Tank Applications

ECV™ Reverse Buckling Rupture Disk

Performance Features

  • Designed for gas, liquid and multi-phase service
  • Suitable for operating pressure to 90% of the minimum burst pressure
  • Designed for non-fragmentation, recommended for Relief Valve isolation
  • Damage safety ratio ≤ 1
  • Suitable for cycling service
  • Vacuum resistant
  • Optional fluoropolymer liner/coating
  • Available with ASME “UD” (select 0%, -5%, -10% Manufacturing Design Range)
  • Pressure Equipment Directive “CE” marking and/or other International Certifications
  • BS&B proprietary technology

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Sizes & Pressures

ECV™ Disk Specifications Minimum Pressure (determined by disk type and gasket material)
Disk Size Buna N, Viton, silicone and EPDM gaskets Fluoropolymer gaskets (process side for ECR only)
in mm ECR and V/ECR ECV and V/ECV ECR-S and V-ECR-S ECV-S and V/ECV-S ECR and V/ECR ECV and V/ECV
psig barg psig barg psig barg psig barg psig barg psig barg
1 25 2 0.1 8 0.6 6.5 0.5 8 0.6 6.5 0.5 12 0.8
1.5 40 2 0.1 5 0.3 4.5 0.3 5 0.3 4.5 0.3 7 0.5
2 50 2 0.1 3 0.2 3 0.2 3 0.2 3 0.2 5 0.4
3 80 1 0.1 2 0.1 2 0.1 2 0.1 2 0.1 5 0.4
4 100 1 0.1 2 0.1 2 0.1 2 0.1 2 0.1 4 0.2
6 150 1 0.1 2 0.1 2 0.1 2 0.1 2 0.1 4 0.2
8-10 200-250 1 0.1 1.5 0.1 1.5 0.1 1.5 0.1 1.5 0.1 2 0.1
12-24 300-600 1 0.1 - - 1 0.1 - - 1 0.1 - -

ECV™ Disk Specifications Maximum Pressure (determined by disk type and gasket material)
Disk Size Buna N gaskets Viton®, silicone and EPDM gaskets
in mm ECR and V/ECR ECV and V/ECV ECR-S and V-ECR-S ECV-S and V/ECV-S ECR and V/ECR ECV and V/ECV ECR-S and V-ECR-S ECV-S and V/ECV-S
psig barg psig barg psig barg psig barg psig barg psig barg psig barg psig barg
1 25 100 6.9 100 6.9 100 6.9 100 6.9 25 2 25 2 25 2 25 2
1.5 40 80 5.5 80 6 80 5.5 80 6 25 2 25 2 25 2 25 2
2 50 80 5.5 80 6 80 5.5 80 6 25 2 25 2 25 2 25 2
3 80 50 3.5 50 3.5 50 3.5 50 3.5 25 2 25 2 25 2 25 2
4 100 50 3.5 50 3.5 50 3.5 50 3.5 25 2 25 2 25 2 25 2
6 150 50 3.5 50 3.5 50 3.5 50 3.5 25 2 25 2 25 2 25 2
8-10 200-250 15 1 15 1 15 1 15 1 15 1 15 1 15 1 15 1
12-24 300-600 15 1 - - 15 1 - - 15 1 - - 15 1 - -
Disk materials nickel (alloy 200); 316L stainless steel; Hastelloy® (alloy C-276); Inconel® (alloy 600); Monel® (alloy 400); and tantalum are available with the same min/max burst pressures. Consult BS&B for applications where the disk may be rated with a coincident specified temperature below the maximum process temperature to which the disk may be exposed. Note: Hastelloy® is a trademark of Haynes International Inc. Monel® and Inconel® are registered trademarks of Special Metals Corporation and Its subsidiaries. Note: Viton® is a trademark of the Chemours Company FC, LLC

Burst Tolerance

Marked Burst Pressure Burst Tolerance
≤ 40 psig (2.76 barg) ± 2 psig (0.138 barg)
> 40 psig (2.76 barg) ± 5%

Safety Heads

EC-7RS Safety Head
EC-7RS Safety Head
EC-7R Safety Head
EC-7R Safety Head

Sensors

Burst Alert Sensors (BAS+)
Round or Square
Leak Detector Alert Sensors (LDAS+) Round or Square

Accessories

BS&B supplies many of the Accessories required to safely and conveniently install our overpressure relief devices and complementary products. Through our professional team and global network of sales engineers and procurement personnel, we are able to provide the highest quality accessory products to meet your installation requirements.

Saf-T-Change Quick Disk Replacement (QDR)
Saf-T-Change Quick Disk Replacement (QDR)

After activation, the replacement disk is quickly slid into place. Saving hours of lost production due to blown rupture disks.

Tell-Tale Assemblies
Tell-Tale Assemblies & Excess Flow Valves/Gauges

A gauge tap in the outlet flange of the safety head may be considered when the safety head is installed in a vertical position.

Spare Safety Heads & Cap Screws
Spare Safety Heads & Cap Screws

Jackscrews
Jackscrews

When activated, the jackscrews effectively separate the flanges, providing adequate clearance to remove or insert a safety head and external gaskets.

Lifting Lug Eye Bolts
Lifting Lug Eye Bolts

Eye bolts are recommended when weight and/or accessibility is a factor in lifting safety heads.

Baffle Plate
Baffle Plate

When a safety head is free-vented to atmosphere, a baffle plate may be considered to disperse overpressure and absorb recoil.

Product Literature

Eco-Saf Series Brochure
Burst Alert Sensors Brochure

Installations

Burst Alert Leak Dectector Installation Instruction
Burst Alert Sensor Installation Instruction

Overview

The type ECV™ reverse buckling Compression Loaded Style Disk provides over pressure relief in either gas/vapor or liquid application. The ECV 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.

ECV™ Rupture Disk (Bursting Disc) Material Options

The ECR™ rupture disks (bursting discs) is available in a range of corrosion resistant materials. Standard disk materials are Nickel alloy 200, Stainless Steel grade 316, Monel® (Nickel alloy 400), Inconel® (Nickel alloy 600), Hastelloy® C-276, & Tantalum. All standard disks are available with 0%, 5%, and 10% manufacturing ranges.

 

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.

 

Installation in EC-7RS™ Safety Head

The ECV™ rupture disks (bursting discs) 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.