Screw Type Holder Assembly

The LaMOT Disc Products Screw Type Assembly is a reusable unit for use in systems with pressures up to 15,000 psig (1,034 barg). The screw type assembly is a reusable rupture disc holder. After an overpressure condition, simply disassemble the screw type holder and swap out the burst rupture disc. Standard or composite rupture discs can be purchased separately.

This assembly is used primarily for laboratory applications and in other small pressure vessels or systems.

The 11/16″ rupture disc with a matching hold-down ring uses the same inlet and outlet holder as the 1/2″ rupture disc with matching hold-down ring.

Available sizes: See Table 14, Screw Type Holder Specifications And Dimensions
Inlet: 1/4″, 3/8″, 1/2″ male pipe threads
Outlet: 1/2″ male pipe threads, muffled or free configurations

Seating configuration: Flat seat
Ideal for use with 1/2″ and 11/16″ standard or 11/16″ composite rupture discs.

Maximum pressure: 15,000 psig (1,034 barg)

Maximum temperature: 1,000°F (538°C)

A brass unit is available with a maximum pressure of 1,000 psig (at 72˚ F) and a maximum temperature of 400°F (204°C).

Materials: 316SS, brass
Other materials available on request. Specify required material when ordering.

Our options and accessories ensure our rupture discs and holders perform in any environment. Consult a representative if you aren’t sure which you need.

Corrosion-resistant liners, coatings, and other protective materials available on request

Gaskets for a perfect seal, even on scratched or pitted disc holders

Protective rings to prevent damage to fragile rupture discs and delicate liners from foreign material in the seating area

Cleaning for oxygen or chlorine service


We’ve spent decades refining our manufacturing processes with efficiency and agility in mind. We’re ready to put our methods to work for you.