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Low Pressure Safety Heads

Safety head assemblies 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 15,000 PSI (62 to 1034 bar)

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 (34 to 689 bar). 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.

BuTech safety head assemblies serve as holders for standard rupture discs (sold separately). Safety heads with rupture discs are used as simple and inexpensive overpressure relief devices. System pressure is relieved as a result of rupture of the replaceable disc.

The safety head assemblies shown are designed for use in high pressure systems up to 15,000 PSI (1030 bar). They can be installed directly into any of our standard couplings, elbows, tees, or crosses. Their versatility also allows direct installation into a standard 3-way valve. The result is a combination valve/safety head with beneficial cost and space advantages.

Standard material of construction is 316 stainless steel.

Configure seal kits or search parts in seconds

 

Catalog Number

Connection

MAWP

A

B

C

Discharge

LPSH2-1/4A

1/8" L/P
Tube

15,000 PSI
1030 bar

1.00"
(25.4)

2.83"
(71.9)

1.00"
(25.4)

3/8" FNPT

LPSH4-1/4A

1/4" SL/P
Tube 

11,500 PSI
790 bar

1.00"
(25.4)

2.81"
(71.4)

1.00"
(25.4)

3/8" FNPT

LPSH6-1/4A

3/8" SL/P
Tube

7,500 PSI
520 bar

1.00"
(25.4)

2.76"
(70.1)

1.00"
(25.4)

3/8" FNPT

LPSH8-1/4A

1/2" L/P
Tube

5,500 PSI
380 bar

1.00"
(25.4)

2.87"
(72.9)

1.00"
(25.4)

3/8" FNPT

 

 

Safety Heads - 1/4" Angled Disc

 

Catalog Number

 

Connection

MAWP

A

B

C

Discharge

LPSH2-1/2F

1/8" L/P
Tube

10,000 PSI
689 bar

1.00"
(25.4)

2.62"
(66.5)

1.00"
(25.4)

3/8" FNPT

LPSH4-1/2F

1/4" SL/P
Tube

10,000 PSI
689 bar

1.00"
(25.4)

2.87"
(72.9)

1.00"
(25.4)

3/8" FNPT

LPSH6-1/2F

3/8" SL/P
Tube

7,500 PSI
520 bar

1.00"
(25.4)

2.87"
(72.9)

1.00"
(25.4)

3/8" FNPT

LPSH8-1/2F

1/2" L/P
Tube

5,500 PSI
380 bar

1.00"
(25.4)

2.68"
(68.1)

1.00"
(25.4)

3/8" FNPT

 

 

Safety Heads - 1/2" Flat Disc

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