SKI™

性能

気相・液相・混合流体兼用
破裂圧力の90％まで運転可能（破裂誤差下限の95％まで）
破片飛散なし、安全弁一次側設置の推奨製品
ダメージ安全率≤１（ダメージがある場合表示破裂圧力の１倍以下で破裂する）
周期的に圧力変動する運転状況に適している
真空耐性あり
オプション：フルオロポリマーライナー/コーティング
ASME “UD”スタンプ対応（製造範囲0%/-5%/-10%選定）
圧力機器指令 “CE” マーク及びその他国際証書対応
BS&B独占技術

Sizes & Pressures

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

psig	barg	psig	barg	psig	barg	psig	barg	psig	barg	psig	barg	psig	barg	psig	barg	psig	barg	psig	barg
1″ (25mm)				1.5″ (40mm)				2″ (50mm)				3″ (80mm)				4″ (100mm)
Burst Pressure		Maximum Back Pressure		Burst Pressure		Maximum Back Pressure		Burst Pressure		Maximum Back Pressure		Burst Pressure		Maximum Back Pressure		Burst Pressure		Maximum Back Pressure
–	–	–	–	–	–	–	–	30	2.06	5	3.45	25	2.06	6	0.41	20	1.39	5	3.45
–	–	–	–	45	3.45	16	1.10	40	2.76	10	0.69	40	2.76	12	0.83	40	2.76	15	1.03
60	4.14	6	0.41	60	4.14	24	1.65	60	4.14	21	1.45	60	4.14	23	1.59	60	4.14	27	1.86
80	5.52	16	1.10	80	5.52	33	2.28	80	5.52	33	2.28	80	5.52	37	2.55	80	5.52	40	2.76
100	6.89	27	1.86	100	6.89	42	2.90	100	6.89	46	3.17	100	6.89	48	3.31	100	6.89	52	3.58
120	8.27	38	2.62	120	8.27	50	3.45	120	8.27	59	4.07	120	8.27	59	4.07	120	8.27	63	4.34
140	9.65	49	3.38	140	9.65	59	40.7	140	9.65	71	4.90	140	9.65	71	4.90	140	9.65	73	5.03
160	11.03	59	4.07	160	11.03	68	4.69	160	11.03	82	5.65	160	11.03	83	5.72	160	11.03	84	5.79
180	12.41	69	4.76	180	12.41	77	5.31	180	12.41	92	6.34	180	12.41	94	6.48	180	12.41	95	6.55
200	13.79	78	5.38	200	13.79	86	5.93	200	13.79	103	7.10	200	13.79	105	7.24	200	13.79	105	7.24
220	15.17	86	5.93	220	15.17	96	6.62	220	15.17	113	7.79	220	15.17	116	8.00	220	15.17	116	8.00
240	16.55	94	6.48	240	16.55	105	7.24	240	16.55	124	8.55	240	16.55	128	8.83	240	16.55	127	8.76
260	17.93	102	7.03	260	17.93	115	7.93	260	17.93	135	9.31	260	17.93	139	9.58	260	17.93	137	9.45
280	19.31	109	7.51	280	19.31	124	8.55	280	19.31	145	1.00	280	19.31	150	10.34	280	19.31	148	10.20
300	20.68	117	8.07	300	20.68	134	9.24	300	20.68	156	10.76	300	20.68	162	11.17	300	20.68	159	10.96
320	22.06	125	8.62	320	22.06	144	9.93	320	22.06	167	11.51	320	22.06	174	12.00	320	22.06	169	11.65
340	23.44	134	9.24	340	23.44	154	10.62	340	23.44	178	12.27	340	23.44	185	12.76	340	23.44	180	12.41
360	24.82	142	9.79	360	24.82	164	11.31	360	24.82	189	13.03	360	24.82	197	13.58	360	24.82	191	13.17
380	26.2	151	10.41	380	26.20	175	12.07	380	26.20	199	13.72	380	26.20	208	14.34	380	26.20	202	13.93
400	27.58	160	11.03	400	27.58	185	12.76	400	27.58	210	14.48	400	27.58	220	15.17	400	27.58	213	14.69
420	28.99	170	11.72	420	28.99	196	13.51	420	28.99	221	15.24	420	28.99	232	16.00	420	28.99	224	15.44
440	30.24	179	12.34	440	30.34	207	14.27	440	30.34	232	16.00	440	30.34	244	16.82	440	30.34	235	16.2
460	31.72	189	13.03	460	31.72	218	15.03	460	31.72	243	16.75	460	31.72	255	17.58	460	31.72	245	16.89
480	33.09	199	13.72	480	33.09	229	15.79	480	33.09	254	17.51	480	33.09	267	28.41	480	33.09	256	17.65
500	34.47	211	14.55	500	34.47	240	16.55	500	34.47	265	18.27	500	34.47	278	19.17	500	34.47	267	18.41

Note: Minimum burst pressures are applicable at all temperatures; maximum burst pressures at 72°F (22°C). For burst pressures below JRS minimums use the type FRS or type LPS disk. For pressures above the JRS maximums, use disk types S-90, RLS, SKR and Sigma. Note: Hastelloy® is a trademark of Haynes International Inc. Monel® and Inconel® are registered trademarks of Special Metals Corporation and its subsidiaries.

Burst Tolerance

Burst tolerance is the +/- range of pressure over which a rupture disk (bursting disc) can be expected to burst.

psig	barg	Burst Tolerance
Specified Burst Pressure		Burst Tolerance
28 and higer	1.9 and higher	± 5%
20 to 28	1.4 to 1.9	± 7%
10 to 20	0.7 to 1.4	± 10%
<10	< 0.7	± 15%
Alternate: < 40	< 2.76	± 2 psig (0.138 barg)

Safety Heads & Sensors

Safety Heads

SRI-7RS
Safety Head

SRB-7RS
Safety Head

SRB-7FS
Safety Head

S90-7R
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.

Documentation

Product Literature

Sta-Saf System

S90™, JRS™, FRS™, RLS™ and SKR™ reverse buckling disks. SRB-7RS™, S90-7R™ and SRB-7FS™ Safety Heads.

SKi™ Reverse Buckling Rupture Disk

Designed for variable back pressure

Saf-T-Change™ QDR Rupture Disk Replacement System

Quick replacement of actives disk fast and with minimum process line exposure to personnel and the environment.

Burst Alert Sensors

A range of sensors suitable for different rupture disk types used to provide immediate warning of a ruptured disk., #77-1003

Detec Saf Alarm System – Burst Disk Monitor

Detec-Saf™ alarm system provides immediate warning and specific location of disk rupture and centralized monitoring of all disk locations.

Installations

Sta-Saf™ System Installation Instructions