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Compressors

Protecting compressors in chemical and petrochemical process plants with rotary valve technology

The chemical / petrochemical industries can put compressors through a variety of extreme conditions, from high pressures and temperatures to gases with aggressive and toxic components. Several different types of compressors are used to move the flow along while reducing the volume of the compressible fluid. This activity usually results in increasing temperature (release of energy) and pressure at the compressor discharge. Because of demanding specifications, strict safety requirements, substantial purchase costs, and the need for long periods of dependable operation, it is crucial to maintain a constant flow rate for protection against damaging flow surge.

Compressor Anti-Surge Solutions

Surges or pressure upsets can cause significant equipment damage, wasted energy and process variations. This fluctuation happens when the pressure on the discharge side is different than the pressure produced by the compressor. This surge phenomenon can happen rapidly and cause the flow to reverse momentarily.

MOGAS rotary control ball valves offer quickness and reliability — capable of stroking to a fully open position in less than a second. Using FlexStream® control technology, these valves are designed to control high ΔP in liquids, gases and multi-phase flow to combat energy consumption, velocity, cavitation and noise.


Compressor Anti-Surge Process Flow Diagram
  1. Compressor Surge Control
  2. Manual Isolation

Multi-Stage Centrifugal Compressor Surge Control Process Flow Diagram
  1. Suction Throttle Control
  2. Stage 1 Surge Control
  3. Stage 2 Surge Control
  4. Stage 3 Surge Control
  5. Stage 4 Surge Control
  6. Suction Emergency Block (Common for all stages)
  7. Discharge Emergency Block (Common for all stages)

Reciprocating Compressor Process Flow Diagram
  1. Pump Pressure Relief