Seal Gas Compression Solutions

Gas sealing systems use a clean and compatible gas to establish controlled conditions around a shaft seal or another sealing arrangement. Depending on the system design, the gas can help limit process-gas leakage, prevent air ingress, protect the seal from contamination or separate the process medium from the surrounding environment.

Seal gas is used in equipment such as compressors, pumps, turbines and other rotating or process machinery. The selected gas is not necessarily inert: systems may use Nitrogen (N₂), conditioned process gas or another medium specified by the equipment and seal-system manufacturer.

LMF compressor solutions increase the seal gas from the available supply pressure to the pressure required by the sealing system. The necessary differential pressure, capacity, gas quality, temperature and availability are defined by the connected equipment and its operating cases.

Seal gas supply can be safety- and availability-critical. The compressor package may therefore require suitable control, monitoring, standby or redundancy concepts according to the overall plant design.

With more than 80 years of experience in reciprocating high pressure compressor technology, LMF develops tailor-made compressor solutions for seal gas applications. Every solution is individually engineered according to the selected gas, supply conditions, required pressure and capacity, operating profile and applicable project specifications.

Recommended Compression Solutions by LMF

Trunk-type Compressors

Recommended for compact seal gas applications requiring comparatively low capacities, a small installation footprint and high discharge pressures.

  • Capacity:
    up to 340 Nm³/h
  • Pressure:
    up to 420 bar
  • Power consumption:
    up to 130 kW

ISO 13631 Compressors

Recommended for continuous seal gas applications requiring higher capacities, stable gas supply and project-specific package engineering.

  • Capacity:
    up to 15 100 Nm³/h
  • Pressure:
    up to 301 bar
  • Power consumption:
    6 MW

Selected References 

Pre-Select a Seal Gas Compressor with CompXpert

Enter the seal gas composition, available supply pressure, required discharge pressure, capacity and operating profile to estimate key process values, pre-select a suitable LMF compressor model and generate an inquiry for our experts.

Contact Our Experts

Looking for a compressor solution for your gas sealing application?
Our experts support you from the initial project phase through engineering, manufacturing and commissioning to develop a tailor-made compressor solution that precisely meets your project requirements.

FAQs

Seal gas is a clean, conditioned gas supplied to a sealing system at defined pressure, temperature and flow conditions. Its precise function depends on the seal arrangement and connected equipment.

Not necessarily. These terms describe different functions and locations within sealing arrangements. Their definitions depend on the seal technology and applicable equipment specification. The compressor must be configured according to the conditions defined for the relevant gas connection.

No. Nitrogen is commonly used as a buffer or barrier gas because it is non-flammable and sufficiently non-reactive for many applications. Some systems use filtered and conditioned process gas or another compatible medium instead.

Insufficient pressure or flow can impair the intended sealing function. Particles, liquids or unsuitable temperatures can damage or disrupt certain seal systems. The gas must therefore meet the pressure, cleanliness, dryness and temperature requirements specified by the seal-system manufacturer.

LMF’s core scope is the reciprocating compressor package that supplies the required gas pressure and capacity. Filters, heaters, control panels, seal-gas modules and other equipment may be included only where explicitly defined in the agreed project scope.