UHV Pressure Burst Disc - 461-PBD, 461-PBD-LP, and 461-PBD-ULP

Allectra’s UHV Pressure Burst Discs have been developed to rupture and release the gas in a vacuum system during potentially hazardous pressure levels greater than atmospheric pressure.

The UHV Pressure Burst Discs come in three different versions:

The standard version — the membrane ruptures at a maximum system pressure of 1.7 bar overpressure

Low-pressure version — the membrane ruptures at a maximum system pressure of 0.8 bar overpressure

Ultra low-pressure version — the membrane ruptures below the pressure of 0.5 bar; thus, overpressure regulations do not apply to the system

Pressure Burst Disc standard version on 40CF.

Pressure Burst Disc low-pressure version on 40CF.

The Ultra Low-Pressure Burst Disc with a rupture pressure below 0.5 bar on 63CF flange. With this component, overpressure regulations do not apply for the system.

*Burst pressure increases at low temperatures up to a factor of 1.8 at −200 °C and reduces at high temperatures up to a factor of 0.7 by 450 °C. Bakeout over 150 °C can increase the maximum burst pressure by a factor of 1.1.

**Versions with gas recovery have a flow rate of >35 L/second for all flange sizes.

Features

Leak tight to <5 x 10⁻¹⁰ mbar L/second, highly bakeable to a temperature of 350 °C, and UHV compatible

Safeguards sensitive components against inadvertent overpressure in the vacuum system

Optional gas recovery system avoids the release of gases into the atmosphere

DN16CF and DN40CF versions/KF types and custom flanges; ULP version requires 63CF or ISO63 flange.

Ultra-Low-Pressure Burst Disc on 63CF.

Pressure Burst Disc standard version on 16CF.

Dimensions

Part Numbers