High Pressure Safety Heads up to 60,000 PSI
The male inlet design can be inserted directly into the tubing connections of valves and various fittings such as tees and crosses, or located in pressure vessels. 
Outlet connections are 3/8" pipe (NPT). This outlet may be connected to a suitable discharge line to vent pressure to a safe location in the event of bursting of the rupture disc. Torque required for sealing rupture discs will range from 40 to 90 foot pounds, depending upon pressure and media being used. 
Material of body and hold down nut is high tensile 316 stainless steel. Standard tubing glands and collars are provided unless otherwise specified. 

high pressure safety heads up to 60000 psi (414 Mpa)

FEATURES & BENEFITS
Safety head assemblies and rupture discs are available in two styles:

  • The 1/4A style features a 1/4" blow-out diameter, an angular seat and can be ordered in pressures from 900 to 60,000 PSI (6.2 to 414MPa).
  • The 1/2F style features a 1/2" blow-out diameter, a flat seat and can be ordered in pressures from 500 to 10,000 PSI (3.4 to 69MPa). This style also has a reversible hold-down ring which greatly reduces the possibility of premature disc failure associated with installation errors inherent in some designs.


Note: Rupture discs are not included and must be ordered as a separate item.  

TYPICAL APPLICATIONS
Gas
Liquid
Fluid handling for the chemical/petrochemical, research, and oil and gas industries

TYPICAL MATERIALS
316 Stainless Steel
Other materials available on request

ORDERING SAFETY HEADS


high pressure safety head - 1/4" angled disc
Safety Head - 1/4" ANGLED DISC
 
Pressure Input Connection Output Connection Safety Head Model Rupture Discs (1/4"A)
15000Psi (103MPa) 1/8" NPT 3/8" NPTF 15SHNMA-A A
1/4" NPT 3/8" NPTF 15SHNMB-A A
3/8" NPT 3/8" NPTF 15SHNMC-A A
1/2" NPT 3/8" NPTF 15SHNMD-A A
10000 Psi (69MPa) 3/4" NPT 3/8" NPTF 10SHNMF-A A
1" NPT 3/8" NPTF 10SHNMH-A A
20000 Psi(138MPa) 1/4" UNF 3/8" NPTF 20SHMM4-A A
3/8" UNF 3/8" NPTF 20SHMM6-A A
9/16" UNF 3/8" NPTF 20SHMM9-A A
3/4" UNF 3/8" NPTF 20SHMM12-A A
1" UNF 3/8" NPTF 20SHMM16-A A
60000 Psi(414MPa) 1/4" UNF 3/8" NPTF 60SHMM4-A A
3/8" UNF 3/8" NPTF 60SHMM6-A A
9/16" UNF 3/8" NPTF 60SHMM9-A A
high pressure safety head - 1/2" flat disc
Safety Head - 1/2" FLAT DISC
 
Pressure Input Connection Output Connection Safety Head Model Rupture Discs (1/2"F)
15000 PSI (103MPa) 1/8" NPT 3/8" NPTF 15SHNMA-F F
1/4" NPT 3/8" NPTF 15SHNMB-F F
3/8" NPT 3/8" NPTF 15SHNMC-F F
1/2" NPT 3/8" NPTF 15SHNMD-F F
10000 PSI (69MPa) 3/4" NPT 3/8" NPTF 10SHNMF-F F
1" NPT 3/8" NPTF 10SHNMH-F F
20000 PSI (138MPa) 1/4" UNF 3/8" NPTF 20SHMM4-F F
3/8" UNF 3/8" NPTF 20SHMM6-F F
9/16" UNF 3/8" NPTF 20SHMM9-F F
3/4" UNF 3/8" NPTF 20SHMM12-F F
1" UNF 3/8" NPTF 20SHMM16-F F
60000 PSI (414MPa) 1/4" UNF 3/8" NPTF 60SHMM4-F F
3/8" UNF 3/8" NPTF 60SHMM6-F F
9/16" UNF 3/8" NPTF 60SHMM9-F F

High Pressure Rupture Discs

high pressure rupture discs with burst pressure up to 65000 psi high pressure rupture discs with burst pressure up to 60000 psi

Rupture discs are available in a wide range of burst ratings. Factors such as corrosion, fatigue and temperature may affect the burst pressure of the disc and cause premature failure. This problem may sometimes be overcome by frequent replacement of the disc. All rupture discs rated over 500 PSI (3.4MPa) have a manufacturing tolerance of minus 3% under to plus 6% over the specified rupture pressure rating.


ORDERING RUPTURE DISCS

Style
A=1/4" Angled
F=1/2" Flat
Material
AL=Aluminum
IN=Inconel
MO=Monel
NI=Nickel
SI=Silver
SS=316SS
TI=Titanium
Pressure
List desired pressure at 72°F (21°C) in KSI.

1.Standard Burst Pressures (in Psi at 21°C)
1000 PSI 3000 PSI 5000 PSI 7000 PSI 9000 PSI 11000 PSI 17500 PSI 25000 PSI 37500 PSI 55000 PSI
1500 PSI 3500 PSI 5500 PSI 7500 PSI 9500 PSI 11500 PSI 18000 PSI 27000 PSI 40000 PSI 60000 PSI
2000 PSI 4000 PSI 6000 PSI 8000 PSI 10000 PSI 12500 PSI 20000 PSI 30000 PSI 45000 PSI 65000 PSI
2500 PSI 4500 PSI 6500 PSI 8500 PSI 10500 PSI 15000 PSI 22500 PSI 35000 PSI 50000 PSI  

2.Standard Burst Pressures (in Mpa at 21°C)
7 Mpa 21 Mpa 34 Mpa 48 Mpa 62 Mpa 76 Mpa 121 Mpa 172 Mpa 259 Mpa 379 Mpa
10 Mpa 24 Mpa 38 Mpa 52 Mpa 66 Mpa 79 Mpa 124 Mpa 186 Mpa 276 Mpa 414 Mpa
14 Mpa 28 Mpa 41 Mpa 55 Mpa 69 Mpa 86 Mpa 138 Mpa 207 Mpa 310 Mpa 448 Mpa
17 Mpa 31 Mpa 45 Mpa 59 Mpa 72 Mpa 103 Mpa 155 Mpa 241 Mpa 345 Mpa  

Examples:
An Inconel disc rated for 12,000 PSI in 1/4" Angled style would be ordered as RD12000-A-IN
An Aluminum disc rated for 750 PSI in 1/2" Flat style would be ordered as RD750-F-AL

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