LPS-W™ Welded Cassette Rupture Disk

Performance Features

  • Solid metal design
  • 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
  • Vacuum resistant
  • Back pressure resistance can be specified
  • Available with ASME “UD” (select 0%, -5%, -10% Manufacturing Design Range)
  • US Patent 9,810,333 applies and international patents pending
  • Manufacturing Design Ranges: 0%, -5%, -10%

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  • Sizes & Pressures
  • Burst Tolerance
  • Accessories
  • Documentation

Sizes & Pressures

LPS-W™ Positive Pressure Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C) & Assembly Dimensions
Disk Size Burst Pressure [ØA] [ØB] [ØC] [D] ASME EN JIS BS
psig barg
in mm min max min max
1 25 15 70 1.03 4.82 [35] [31] [56.9] [42] 150/300/600 10/16/25/40 10/16/20/30/40 10
1.5 40 6 55 0.41 3.79 [48] [43.5] [76] [46] 150/300/600 10/16/25/40 10/16/20/30/40 10
2 50 5 40 0.34 2.76 [63.5] [59] [95] [50] 150/300/600 10/16/25/40 10/16/20/30/40 -
3 80 5 35 0.34 2.41 [89] [84.6] [126.75] [58] 150/300/600 10/16/25/40 16/20/30/40 -
5 100 5 30 0.34 2.07 [114.5] [110] [162] [74] 150 10/16/25/40 10 -
6 150 5 25 0.34 1.72 [165.3] [161] [215.5] [96] 150 10/16/25/40 10 -

Burst Tolerance

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

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)

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

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

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

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

Baffle Plate

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