Sealed OTU (One Time Units) rupture disk holders are used in applications where relief capacity is low and the requirement is for a compact, low-cost, one-time-use relief device that is easily installed. The low initial cost and the long service life expectancy make it practical to discard the complete unit after rupture. Standard construction is a brass body with a nickel or stainless steel rupture disk. Special materials and other sizes are available. Standard inlet and outlet connections are 1/4”, 3/8”, and 1/2” MPT, with a choice of outlet connections, including free-venting, muffled, 1/2” SAE, and 3/8” SAE.

• Low-relief-capacity applications
• Compact, low-cost “throwaway” unit for one-time use

Extruder Disk/Holder Assembly

OSECO’s extruder disk assemblies place the rupture disk flush with the pressure vessel wall, ensuring there are no cavities where products can stagnate and solidify. The rupture disk is soldered or welded to the barrel to prevent any possible leakage, regardless of pressure and temperature. Most extruder assemblies are custom-desigend for individual applications, but OSECO also has several standard designs that are common to the extruder industry. The barrel or body is normally stainless steel, with the rupture disk of nickel, Monel, Inconel, or stainless steel 316. The OSECO extruder disk assembly may be factory-repairable.

• Disk flush with pressure vessel wall
• No cavities where products can stagnate and solidify
• Soldered or welded construction to prevent leakage

Relief Valves

The ORV is a low cost relief valve for applications requiring small relieving capacities. Standard material is brass, having a pressure range of 5 psig through 250 psig and stainless steel, having a set pressure of 5 psig through 500 psig. Outlet connections are also available when required, as well as deflector cover.

• For small relieving capacitiy applications
• Brass and stainless steel are standard material
• Pressure ranges of 5 psig  through 500 psig
• Threaded outlet connection available

See the Manufacturing Ranges, Min/Max, and Dimensions charts for the OTU

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