MDC's Molecular Sieve Foreline Traps are engineered to deliver exceptional protection against oil backstreaming and efficient water vapor capture in vacuum systems. These traps utilize Type 13X synthetic zeolite, capable of adsorbing water vapor and hydrocarbons at room temperature.

When base vacuum performance degrades due to vapor saturation, the sieve charge can be reactivated via a built-in heater reaching a constant 150°C (302°F). Bakeout cycles, typically lasting 4 to 12 hours, can be scheduled during off-hours using a timer. Oil contaminants are not removed by heating, so periodic replacement of the zeolite material is required when signs of hydrocarbon saturation appear.

The top-access port allows for quick and convenient replacement of the trapping material. Traps are designed for flexible mounting in vertical or horizontal positions, and are available with hose or flange-style connections. Each trap is constructed from Type 304 stainless steel, ensuring strength and corrosion resistance.

Industry Applications

MDC’s Molecular Sieve Foreline Traps are widely used in semiconductor manufacturing, thin-film deposition, analytical instrumentation, and R&D vacuum systems. They are essential for protecting mechanical pumps and maintaining clean, stable vacuum conditions in high and ultrahigh vacuum (UHV) environments, especially where hydrocarbon-free operation is critical.