HiLo-S™ Sanitary Two Way Acting Rupture Disks

Hilo-S Disk

High Pressure Side

Low Pressure Side

Performance Features

Unique, two-way acting HiLo disk prevents vessel damage from overpressure or implosion under vacuum
Vacuum pressure relief through reverse buckling of the disk (lo-side)
Positive pressure relief through forward acting burst of the disk (hi-side)
Available in sizes 2 to 12 inches (50 to 300 mm)
Temperature capability up to 400°F (200°C)
Set pressures starting at 5 inch water column and up (12.5 mBar)
Gas service (acceptable for liquid service with a compressible gas / vapor pocket between the liquid and disk. Minimum 20 pipe diameter gas volume on process and vent side of disk)
TSE-BSE Free
BS&B proprietary technology

Request a Quote

Sizes & Pressures
Burst Tolerance
Safety Heads & Sensors
Documentation

Sizes & Pressures

Fluoropolymer Seal Burst Pressure Range from 50°F to 150°F (10°C to 65°C)

in	mm	min	max	min	max	min	max	min	max
Disk Size		Low Pressure Direction Burst Pressure				High Pressure Direction Burst Pressure
Disk Size		WC inches		mbar		psi		bar
2	50	10	51	25	127	11	28	0.8	1.9
3	80	6	36	15	90	8	28	0.6	1.9
4	100	5	28	12.5	70	7	28	0.5	1.9
6	150	6	19	15	47	4	22	0.3	1.5
8	200	5	15	12.5	37	3	22	0.2	1.5

Available with other pressure/temperature combinations. Contact BS&B.

Chemfilm^® DF2919 Seal Burst Pressure Range from 50°F to 400°F (10°C to 204°C)

in	mm	min	max	min	max	min	max	min	max
Disk Size		Low Pressure Direction Burst Pressure				High Pressure Direction Burst Pressure
Disk Size		WC inches		mbar		psi		bar
2	50	18	300	45	747	39	75	2.7	5.2
3	80	7	300	17.5	747	28	75	1.9	5.2
4	100	5	300	12.5	747	22	75	1.5	5.2
6	150	6	300	15	747	15	75	1	5.2
8	200	5	300	12.5	747	12	75	0.08	5.2

For some combinations of size, temperature and burst pressures: Temperature range is -100ºF to 350ºF (-73C to 176ºC). Chemfilm is a registered trademark of Saint-Gobain Performance Plastics Corporation.

Burst Tolerance

Hi direction burst tolerance

psig	barg	Burst Tolerance
Specified Burst Pressure		Burst Tolerance
> 4 to 9	> 0.3 to 0.6	± 20%
> 9 to 13	> 0.6 to 0.9	± 15%
> 13 to 18	> 0.9 to 1.2	± 10%
>18 to 25	> 1.2 to 1.7	± 7%
> 25	> 1.7	± 5psig