Positive Arch Open Slit Rupture Disks (LF)

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Positive Arch Open Slit Rupture Disks (LF)

Slightly fragmented

Size range: 15mm-1100mm

Burst pressure range: 0.02-200 barg

Can be operated below 80% of nominal burst pressure

Suitable for gas phase, liquid phase or both gas and liquid phase media

Standard materials: Stainless Steel / Fluoroplastic / Stainless Steel with optional seals.

Nameplate includes all rupture disk parameters

Demand consultation

Positive Arch Open Slit Rupture Disks (LF)

Product Overview
Specifications
Downloads

Product Overview

A positively arched rupture disk with the concave side on the high pressure side of the pressure system. Composite rupture disks consist of three parts: a strength film, a sealing film, and a back pressure carrier.

LF Series rupture disks are installed with the concave side facing the process media. A laser-opened slit determines the burst pressure. When the rupture disk bursts, the metal sheet opens along a predetermined weak point and folds toward the gripper, preventing splintering.

Bursting Tolerance / (GB567-2012)

Calibrated Burst Pressure bar	≥0.01~<0.1	≥0.1~＜1	≥1~＜3	≥3~＜1000	≥1000~＜5000
Bursting Tolerance	±50%	±25%	±0.015MPa	±5%	±4%

* The rupture tolerance is the maximum expected change in rupture pressure marked by the rupture disc.

Specifications

Size		FEP				Polytetrafluoroethylene				Aluminum				Nickel
NPS	DN	psig		barg		psig		barg		psig		barg		psig		barg
[in]	[mm]	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,
1"	25	11.6	1015	0.8	70	29	1015	2	70	87	1595	6	110	348	2175	24	150
1.25"	32	8.7	870	0.6	60	21.75	870	1.5	60	65.25	1450	4.5	100	290	1305	20	90
1.5"	40	5.8	725	0.4	50	14.5	725	1	50	52.2	1305	3.6	90	217.5	1160	15	80
2"	50	4.35	580	0.3	40	10.88	580	0.75	40	49.3	957	3.4	66	203	1015	14	70
2.5"	65	3.63	522	0.25	36	9.08	522	0.63	36	36.25	841	2.5	58	159.5	870	11	60
3"	80	2.9	464	0.2	32	7.25	464	0.5	32	31.9	725	2.2	50	145	725	10	50
4"	100	2.18	420.5	0.15	29	5.45	420.5	0.38	29	26.1	638	1.8	44	116	580	8	40
5"	125	2.18	377	0.15	26	5.45	377	0.38	26	21.75	580	1.5	40	101.5	580	7	40
6"	150	2.18	333.5	0.15	23	5.45	333.5	0.38	23	18.85	493	1.3	34	87	435	6	30
8"	200	1.45	304.5	0.1	21	3.63	304.5	0.25	21	14.5	435	1	30	72.5	435	5	30
10"	250	1.16	246.5	0.08	17	2.9	246.5	0.2	17	11.6	348	0.8	24	58	435	4	30
12"	300	1.02	203	0.07	14	2.55	203	0.18	14	10.15	290	0.7	20	43.5	362.5	3	25
14"	350	0.87	174	0.06	12	2.18	174	0.15	12	8.7	275.5	0.6	19	43.5	362.5	3	25
16"	400	0.73	145	0.05	10	1.83	145	0.13	10	7.25	261	0.5	18	36.25	290	2.5	20
Maximum operating temperature		400℃				430℃				480℃				480℃

Size		Monel				Inconel				Stainless steel				Hastelloy
NPS	DN	psig		barg		psig		barg		psig		barg		psig		barg
[in]	[mm]	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,	min,	max,
1"	25	406	2175	28	150	478.5	2175	33	150	406	2175	28	150	435	2175	30	150
1.25"	32	319	1305	22	90	377	1305	26	90	319	1305	22	90	333.5	1305	23	90
1.5"	40	261	1160	18	80	304.5	1160	21	80	261	1160	18	80	275.5	1160	19	80
2"	50	232	1015	16	70	275.5	1015	19	70	232	1015	16	70	261	1015	18	70
2.5"	65	174	870	12	60	203	870	14	60	174	870	12	60	377	870	26	60
3"	80	159.5	725	11	50	174	725	12	50	159.5	725	11	50	333.5	725	23	50
4"	100	130.5	580	9	40	145	580	10	40	130.5	580	9	40	261	580	18	40
5"	125	116	580	8	40	130.5	580	9	40	116	580	8	40	217.5	580	15	40
6"	150	101.5	435	7	30	116	435	8	30	101.5	435	7	30	203	435	14	30
8"	200	87	435	6	30	101.5	435	7	30	87	435	6	30	159.5	435	11	30
10"	250	72.5	435	5	30	87	435	6	30	72.5	435	5	30	130.5	435	9	30
12"	300	58	362.5	4	25	72.5	362.5	5	25	58	362.5	4	25	116	362.5	8	25
14"	350	58	362.5	4	25	72.5	362.5	5	25	58	362.5	4	25	101.5	362.5	7	25
16"	400	43.5	290	3	20	58	290	4	20	43.5	290	3	20	87	290	6	20
Maximum operating temperature		400℃				430℃				480℃				480℃