Type D™ Forward Acting Rupture Disk

D Disk

DV Disk

Vacuum support disk

DR Disk

Disk with a protective ring

DRR Disk

Disk with a protective ring attached to the top and bottom

DRV Disk

Disk with a protective ring attached to the top of the disk and a vacuum support below

DSV Disk

For strong vacuum service

DRSV Disk

PLD Disk

Disk with fluoropolymer attached to top (atmospheric) side

PLDV Disk

Plastic liner covering and isolating a built-in support from process

Performance Features

Designed for gas service (acceptable for liquid service with a compressible gas/vapor pocket)
Suitable for operating pressure to 90% of the marked burst pressure (80% of the minimum burst pressure)
Damage safety ratio ≤ 1
Vacuum resistant with additional vacuum support
Back pressure resistance can be specified
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
Burst Tolerance
Safety Heads & Sensors
Accessories
Documentation

Sizes & Pressures

Type D™ Disk Specifications Minimum/Maximum Pressure with Rating at 72° (22°C)

in	mm	psig		barg		psig		barg		psig		barg		psig		barg		psig		barg		psig		barg		psig		barg		psig		barg
Disk Size		Nickel Alloy 200				Monel Alloy 400				Inconel Alloy 600				Hastelloy Alloy C-276				316SS				Aluminum				Fluoropolymer Film				Silver
in	mm	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max	min	max
1	25	1800	2000	13	138	220	2000	16	138	285	2000	20	138	680	2000	48	138	400	2000	28	138	50	1600	4	113	89	1000	4	113	110	2000	8	141
1.5	40	120	1400	8	99	145	1400	10	99	185	1400	13	99	265	1400	19	99	265	1400	19	99	33	1300	2	91	63	700	4	49	73	1400	5	99
2	50	69	1100	5	77	84	1100	6	77	109	1100	8	77	260	1100	18	77	150	1100	11	77	20	960	1	68	31	555	2	39	43	1100	3	77
3	80	52	900	4	63	62	900	4	63	79	900	6	63	195	900	14	63	115	900	8	63	15	730	1	51	25	450	2	32	32	650	2	46
4	100	39	830	3	58	47	830	3	58	60	830	4	58	145	830	10	58	85	830	6	58	12	630	1	44	19	415	1	29	24	600	2	42
6	150	29	640	2	45	35	640	3	45	45	640	3	45	110	640	8	45	64	640	5	45	9	485	1	34	13	320	1	23	18	500	1	35
8	200	23	590	2	42	28	590	2	42	35	590	3	42	85	590	6	42	50	590	4	42	7	420	0.5	30	11	295	1	21	14	400	1	28
10	250	18	480	1	34	22	480	2	34	28	480	2	34	-	-	-	-	38	480	3	34	5	340	0.4	24	7	240	0.5	17	12	200	1	14
12	300	15	400	1	28	19	400	1	28	24	400	2	28	-	-	-	-	34	400	2	28	5	290	0.4	20	5	200	0.4	14	-	-	-	-
14	350	14	350	1	25	17	350	1	25	22	350	2	25	-	-	-	-	29	350	2	25	4	270	0.3	19	5	170	0.4	12	-	-	-	-
16	400	12	300	1	21	14	300	1	21	19	300	1	21	-	-	-	-	25	300	2	21	4	250	0.3	18	5	150	0.4	11	-	-	-	-
18	450	10	270	1	19	13	270	1	19	17	270	1	19	-	-	-	-	23	270	2	19	4	225	0.3	16	5	135	0.4	10	-	-	-	-
20	500	10	240	1	17	12	240	1	17	15	240	1	17	-	-	-	-	20	240	1	17	3	200	0.2	14	5	120	0.4	8	-	-	-	-
24	600	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	70	200	5	14	3	170	0.2	12	5	100	0.4	7	-	-	-	-
30	750	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	-	56	170	4	12	3	140	0.2	10	5	80	0.4	6	-	-	-	-

Burst Tolerance

Marked Burst Pressure	Burst Tolerance
2 ≤ 15 psig (0.14 ≤ 1.03 barg)	± 1.5 psig (0.1 barg)
15 < 40 psig (1.03 < 2.8 barg)	± 2.0 psig (0.14 barg)
≥ 40 psig (2.76 barg)	± 5%

Safety Heads

FA-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)

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.