HL-7RS™ Safety Heads (Holders)

Performance Features

Insert type safety head that fits inside the bolt circle of companion flanges to allow for easy installation and removal
Pre-torqued capscrews clamp the rupture disk within the safety head, independently of companion flange bolts, which allows for future removal, inspection, and re-installation
A J-bolt ensures the safety head is fitted in the required direction between companion flanges by engaging a blind hole drilled on the inlet companion flange perimeter
Asymmetric alignment pins in the safety head mate with locating holes in the rupture disk, ensuring centering and correct orientation of the rupture disk within the safety head
Flow arrows on the side of the safety head indicate correct directional installation with process flow
Can be equipped with pressure tapping in either inlet or outlet to allow installation of monitoring devices and sensors
For use with flanged piping connections; Raised face, Ring joint and tongue and groove flange facings. Designed for multi flange ratings and piping standards
The rupture disk dome fully protected within safety head inlet to avoid damage when installed into piping system
Disk activation achieved by knife blade technology

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Sizes & Pressures
Disks & Sensors
Materials & Option
Accessories
Documentation

Sizes & Pressures

HL-7RS Safety Head (Holder) Dimensions

in	mm	ANSI	DIN	JIS	in	mm
Disk Size		Safety Head Flange Rating			Face-to-Face Dimensions
1	25	150	10/16	10/16	1.5	38
1	25	300/600	25/40	20/30/40	1.5	38
1	25	900/1500	-	-	3	76
1.5	40	150	10/16	10/16	1.68	43
1.5	40	300/600	25/40	20/30/40	1.68	43
1.5	40	900/1500	-	-	2.6	66
2	50	150	10/16	10/16	1.88	48
2	50	300/600	25/40	20/30/40	1.88	48
2	50	900/1500	-	-	3.37	85
3	80	150	10/16	10/16	2.19	55
3	80	300/600	25/40	20/30/40	2.19	55
3	80	900	-	-	3.5	89
4	100	150	10/16	10/16	2.88	73
4	100	300	25/40	20/30/40	2.88	73
4	100	600	-	-	2.56	67
6	150	150	10/16	10/16	3.63	92
6	150	300	25/40	20/30/40	3.63	92
6	150	600	-	-	3.06	79
8	200	150	-	-	3.75	95
8	200	300	-	-	3.75	95

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

Rupture Disks

Hilo Disk

Sensors

BAS+ Sensor

Standard Materials

316 stainless steel and carbon steel.

Also available Monel^® alloy 400, Inconel^® alloy 600, Hastelloy^® alloy C and C-276, aluminum, and titanium.

Torque Resistant Safety Head Option

The Type TR™ Series torque resistant safety head option offers the identical performance and flow characteristics valued from standard BS&B safety heads. The only difference – the TR Series Safety Heads are designed with a wider seating surface to be used with metal spiral wound gaskets at the flange. This distinct safety feature protects rupture disks from situations where plant personnel may overtorque rupture disks within piping systems.

Because of the wider seating surface of the TR Series Safety Head, the load is distributed over a much broader area reducing the influence of excessive torque transmitted to the disk.

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.