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Safety Heads/Rupture Discs - Safety Heads and Rupture Discs offer an economical and dependable relief port to guard against system over-pressure.

Autoclave Engineers offers universal safety heads in three series compatible in orifice size and maximum pressure rating with Autoclave Low Pressure, Medium Pressure and High Pressure valves, fittings and tubing.

Autoclave Low Pressure Series SS: Autoclave SpeedBite Ermeto-type tube connection, maximum rupture pressures to 15000 psi (1034 bar).

Autoclave Medium Pressure Series CSX: Autoclave Medium-Pressure coned-and-threaded tube connection, maximum rupture pressures to 20000 psi (1379 bar).

Autoclave High Pressure Series CS: Autoclave High Pressure coned-and-threaded tube connection, maximum rupture pressure to 110000 psi (7584 bar).

The 3/16F style features a 3/16” blow-out diameter and a flat seat which can be ordered in pressure range from 200 to 27000 psi (13.8 to 1862 bar).

The 1/4A style features a 1/4” blow-out diameter and an angular seat which can be ordered in pressures from 900 to 60000 psi (62 to 4137 bar).

The 1/4F style features a 1/4” blow-out diameter and a flat seat which is used for pressure above 60000 psi (4137 bar).

The 1/2F style features a 1/2” blow-out diameter and a flat seat which can be ordered in pressures from 500 to 10000 psi (35 to 690 bar).

ASME Safety Head - Autoclave now has an ASME Section VIII Div. 3 safety head assembly rated to 115000 psi (7929 bar). Contact the factory or your local sales representative for details and ordering information.

Materials and Features
  • Non-rotating double-cone plug design avoids galling and scoring of safety head or connection during installation. Reduces likelihood of leakage.
  • Interchangeable hold-down rings permit use of several different sizes and types of rupture discs in a single safety head. Accommodates discs with rupture pressures as low as 90 psi (6.2 bar) and ranging to 60000 psi (4137 bar) and above.
  • Installs in any standard Autoclave coupling, elbow, cross or tee.
  • Cold-worked Type 316 SS body hold down gland and plug, all series.
  • Hold down rings are corrosion resistant stainless steel.
Consult Local Sales Representative for safety head assemblies rated above 60000 psi (4137 bar).

Ordering Information
To order an Autoclave Universal Safety Head, use the catalog order number from table. ADD THE SIZE OF THE RUPTURE DISC YOU WANT AS A SUFFIX TO THE CATALOG NUMBER; SUCH AS CS6600-1/4A. Then order desired rupture discs from rupture disc section. (This is important since the disc size determines which hold-down ring will be furnished with the safety head.) Note: Plug is included.

Note: Interchangeable hold-down rings permit use of several different sizes and types of rupture disc in a single safety head.

Maximum pressure rating is based on the lowest rating of any component.
Actual working pressure may be determined by tubing pressure rating, if lower.

All dimensions for reference only and subject to change.
For prompt service, Autoclave stocks select products. Consult your local representative.
All general terms and conditions of sale, including limitations of our liability, apply to all products and services sold.
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Item #

Pressure Type

Fits Connection Type

Fitting Pressure Rating

Body Torque

Plug Orifice

Body Orifice

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SS2600 N/A Low Pressure N/A W125 N/A 15000 psi1034.20 bar N/A 15 ft·lb20.3 N·m N/A 0.094 Inch2.39 mm N/A 0.125 Inch3.15 mm Request Quote
SS4600 N/A Low Pressure N/A SW250 N/A 15000 psi1034.20 bar N/A 15 ft·lb20.3 N·m N/A 0.125 Inch3.18 mm N/A 0.250 Inch6.35 mm Request Quote
SS6600 N/A Low Pressure N/A SW375 N/A 15000 psi1034.20 bar N/A 15 ft·lb20.3 N·m N/A 0.250 Inch6.35 mm N/A 0.375 Inch9.53 mm Request Quote
SS8600 N/A Low Pressure N/A SW500 N/A 10000 psi690 bar N/A 20 ft·lb22.1 N·m N/A 0.375 Inch9.53 mm N/A 0.375 Inch9.53 mm Request Quote
CSX4600 N/A Medium Pressure N/A SF250CX N/A 20000 psi1378.9 bar N/A 15 ft·lb20.3 N·m N/A 0.094 Inch2.39 mm N/A 0.141 Inch3.58 mm Request Quote
CSX6600 N/A Medium Pressure N/A SF375CX N/A 20000 psi1378.9 bar N/A 20 ft·lb27.1 N·m N/A 0.171 Inch4.34 mm N/A 0.250 Inch6.35 mm Request Quote
CSX9600 N/A Medium Pressure N/A SF562CX N/A 20000 psi1378.9 bar N/A 30 ft·lb40.6 N·m N/A 0.312 Inch7.92 mm N/A 0.375 Inch9.53 mm Request Quote
CS4600 N/A High Pressure N/A F250C N/A 60000 psi4136.8 bar N/A 20 ft·lb2.8 N·m N/A 0.082 Inch2.08 mm N/A 0.125 Inch3.15 mm Request Quote
CS6600 N/A High Pressure N/A F375C N/A 60000 psi4136.8 bar N/A 40 ft·lb5.5 N·m N/A 0.125 Inch3.18 mm N/A 0.219 Inch5.56 mm Request Quote
CS9600 N/A High Pressure N/A F562C N/A 60000 psi4136.8 bar N/A 80 ft·lb11.1 N·m N/A 0.188 Inch4.78 mm N/A 0.281 Inch7.13 mm Request Quote
40CS9600 N/A High Pressure N/A F562C40 N/A 40000 psi2757.9 bar N/A 80 ft·lb11.1 N·m N/A 0.250 Inch6.35 mm N/A 0.281 Inch7.13 mm Request Quote
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