Confirmed Technical Parameters
The following parameters are confirmed from factory product documentation. Motor power, weight, overall dimensions and compression stages are determined by process conditions and are provided on enquiry — we do not publish estimated values.
What the 4MW-93/35 Is
4MW identifies a four-column MW-type reciprocating compressor frame — a heavier-duty platform than the ZW series, engineered for the sustained mechanical demands of large-scale continuous gas service. 93 is the rated flow in m³/min. 35 is the outlet pressure in bar (3.5 MPa).
The 3.5 MPa outlet pressure distinguishes this machine from the standard 3.0 MPa industrial oxygen pipeline specification. In air separation plant applications, this higher pressure level is specified where the downstream distribution pipeline requires additional margin, or where process conditions at the end-use point demand more than 3.0 MPa. The applicable pressure is always determined by the ASU process data sheet.
The product image shown is an engineering 3D rendering of the 4MW-93/35, representing the machine's four-column layout, skid base, inter-stage cooling arrangement and instrument piping. A factory-assembled unit photograph is available on request.
The standard industrial oxygen pipeline pressure is 3.0 MPa (30 bar). The 4MW-93/35 operates at 3.5 MPa (35 bar) — applicable where the ASU process design or downstream pipeline conditions require the higher pressure level. Confirm your required outlet pressure from the ASU process data sheet before specifying this model.
The MW-Type Frame — Built for Large-Scale Continuous Service
The MW platform is a distinct reciprocating compressor design from the ZW series, developed for higher capacity and the mechanical demands of large-scale industrial gas service. Understanding the frame distinction matters when specifying this machine against a process data sheet.
Four-Column Opposed Layout
Four cylinder columns are arranged symmetrically around the crankshaft. Piston forces on opposing columns act in opposite directions, partially cancelling each other. This reduces the net unbalanced force transmitted to the foundation compared to a two-column machine of equivalent capacity.
Designed for Continuous Duty
Air separation plants run continuously. The MW frame is rated for sustained continuous operation — crankshaft, bearings, crossheads and connecting rods are all specified for long-interval overhaul schedules consistent with ASU plant maintenance cycles.
API 618 Design
The 4MW-93/35 is designed to API 618 (Reciprocating Compressors for Petroleum, Chemical and Gas Industry Services). This is the international standard required by EPC contractors and engineering firms specifying compressors for major industrial gas and petrochemical projects.
EPC Documentation Package
We supply a complete documentation package for EPC procurement: general arrangement drawing, foundation loading diagram, P&ID, IOM manual, factory performance test certificate and material certificates. Witnessed FAT and SIL documentation available on request.
4MW-93/35 vs 4ZW-84/30 — Two Confirmed Models in This Family
Both models are confirmed from factory documentation and are distinct machines on different frame platforms. The choice between them is determined by your ASU process data sheet.
What We Need to Provide a Full Technical Proposal
The 4MW-93/35 is supplied against process conditions, not a fixed catalogue specification. Send us your ASU compressor data sheet from the process licensor or EPC contractor — this is the standard starting document for all large-scale ASU compressor projects.
Gas type (O₂ or N₂), purity specification, permissible impurity levels, moisture content at compressor inlet. If the machine may handle both gases at different times, specify each separately.
Inlet pressure (MPa abs), inlet temperature (°C), outlet pressure (MPa), maximum allowable outlet temperature. Confirm whether 3.5 MPa is the required outlet or whether your process specifies a different pressure level.
Normal operating flow, maximum and minimum flow at inlet conditions (m³/min or Nm³/h). State whether turndown control is required and what control method is preferred (bypass valve, variable speed, cylinder unloading).
Power supply voltage and frequency, cooling water conditions, site altitude and ambient temperature, explosion-proof zone classification, required certifications (CE, ATEX, witnessed FAT), documentation scope (IOM, material certs, SIL) and target delivery date.
We return a full technical proposal — motor selection, dimensional drawing, weight estimate, utility requirements, delivery schedule and pricing — within one business day.
Contact Engineering Team [email protected]Common Questions
Other Products in This Family
Four-column ZW-type · 84 m³/min · 3.0 MPa · O₂ / N₂
All confirmed large-scale air separation compressors
ZW/LW/DW/4MW catalogue machines · 4–100 m³/min · fixed parameters