VAC-SAF™Rupture Disks

• Storage Tanks
• Silos
• Pi- Fermentation Systems
• Glycol re-boilers

USED IN PROCESSES

• Aseptic
• Food
• Dairy
• Beverage
• Pharmaceutical
• Applications where contamination in unacceptable.

The VAC-SAF Disk Components

VAC-SAF ^TM Rupture disks consist of three main parts:

A perforated and slotted metal section.

A Fluropolymer seal with integral Fluropolymer button.

A Fluropolymer slit cover between the Fluropolymer seal and the metal section prevents damage to the seal by the slits in the metal section.

Rupture Disk (Bursting Disc) Types DKB & VKB

Features

• Unique two-way acting disks prevent vessel damage from implosion under vacuum or over pressure
• Available in sizes 50 mm to 200 mm
• No-Vacuum relief pressures available from 110 mm bar down to 10m bar
• No-Forgas or liquid applications
• Disk offers smooth surface towards
• Disk offers smooth so Race towards the process which prevents product accumulation and facilitates cleaning of the disk
• Asymmetric alignment pins in the Safety Head mate with locating holes in the rupture disk (bursting disc) for proper alignment and installation
• The standard material of the disks metal section is 316 SS. Consult BS&B regarding other materials, e.g. lnconel 600, Monel 400, Nickel 200 and Hastelloy C-276. The disk's seal material is Teflon.

Vacuum Relief

At the rated Vacuum relief pressure the disk's seal separates from the perforated metal section to snap against knife blades located in the safety Head inlet , cutting the seal into three segments. The perforated metal sections remains intact and flow through the holes in the metal sections relieves the Vacuum condition.

The disk relieves over pressure by opening fully along the radial slits in the perforated metal section.

VKB Rupture disk and KB-C Safety Head with quick release hygienic fittings provides easy dismantling for routine maintenance. The 0-ring seal provides leak-tight connection.

Vacuum Relief

Burst Range
The Disks are available with a Burst Range of +/- 3.75 mbar for pressure up to 20 mbar and +/- 20% for higher pressures. All tolerances are included in the Burst Range.

Markings
A disk with vacuum relief pressure of 18 mbar will be shown on the disk tag as min 14.25 mbar to max 21.75 mbar

Operating Pressure
The system may operate up to 80% of the minimum of the marked Burst Pressure without affecting the service life of the disk.

Overpressure Relief

Manufacturing Range

The disks are available with a +/- 0.138 bar or 10% manufacturing range depending on the burst pressure.

Tagged Burst Manufacturing

Example:
A burst pressure of 4 bar is requested with a 10% manufacturing range. The values of the burst tests carried out during manufacture will be between 3.6 bar and 4 bar. The average of these test values will be marked on the disk tag.

Burst Tolerance|
Tolerances are the maximum variation from the burst pressure shown on the disk tag.

Operating Temperature Range
Minimum -40'C to Maximum 80'C.

Highlights

• Unique two-way acting disks prevent vessel damage from light over pressure or implosion under vacuum
• Features
• Available in sizes 50mm to 200mm
• Rupture pressures available from 110 mbar down to 10 mbar
• Asymmetric alignment pins in the Safety Head mate with locating holes in the rupture disk (bursting disc) for proper alignment and installation.
• The standard material of the disks metal section is 316SS. Consult BS&B regarding other materials, e.g. lnconel 600, Monel 400, Nickel 200 and Hastelloy C-276. The disk's seal material is fluropolymer.
• For gas or liquid applications

Overpressure relief

At the rated burst pressure the disk's seal separates from the perforated metal section to snap against knife blades, located in the Safety Head outlet, cutting the seal into three segments. The perforated metal section remains intact and flow through the holes in the metal section relieves the over pressure.

Overpressure Relief

Burst Range: + /- 3.75 mbar for pressure up to 20 mbar and +/- 20% for higher pressures. All tolerances are included in the Burst Range.
Markings
A disk with a marked burst pressure of 40 mbar will be shown on the ,disk tag as Min. 32 mbar Max. 48 mbar
Operating Pressure
The system may operate up to 80% of the minimum of the Burst Range without affecting the service life of the disk.
Operating Temperature Range
Minimum -40'C to Maximum 800C
Vacuum Relief
The disk may be used also to relieve vacuum depending on specific requirements.

Safety Head Insert Types KB-7R & PKB-7R

• Quik-Sert reduces diameter safety head fits inside the studs of two companion flanges
• Asymmetric alignment pins in the Safety Head mate with locating holes in the rupture disk (bursting disc) for proper
  alignment and installation
• No-The inlet and outlet of the Safety Heads is held together by side lugs
• Standard materials are 304 SS and carbon steel. Consult BS&B Safety Systems for other materials
• Knife blade material is 301 SS

The dome of the disk is protected by the Safety Head.

Safety Head Hygenic Types KB-C & PKB-C

• Hygienic fittings permit quick installation or dismantling
• Ring seal provides leak tight connection
• Asymmetric alignment pins in the Safety Head mate with locating holes in the rupture disk (bursting disc) for proper alignment and installation
• The knife blade material is 301 SS
• Safety Head material 300 series stainless steel