Running an LNG liquefaction plant demands compression equipment that operates at extreme pressures, handles highly flammable process streams, and maintains zero-compromise reliability around the clock. Our comprehensive range of natural gas compressors, mixed refrigerant compressors, BOG compressors, and raw material air compressors has been deployed across liquefaction facilities serving the UK, continental Europe, and beyond. Whether your plant processes wellhead feed gas, cycles a mixed refrigerant loop, or manages boil-off gas from cryogenic storage, we have a validated, type-tested machine to match your process envelope. Each unit is designed by engineers with decades of hands-on experience in gas compression, and every machine exits our facility only after rigorous performance and leak testing to international safety standards. For UK buyers, we provide full documentation packages including CE/UKCA declarations of conformity, ATEX-compliant electrical specifications, and process data sheets compatible with UK PSSR and DSEAR regulatory requirements.
Complete LNG Compressor Product Range
Seven models, one integrated solution. Click images to enquire about a specific unit.
Technical Specifications — General Series Parameters
The parameters below apply across the product family. For the precise datasheet of any individual model (including P&ID, nozzle schedule, or utility summary), please contact our engineering team by email.
| Parameter | Range / Value | Notes |
|---|---|---|
| Single-Unit Gas Output | 2 – 500 Nm³/min | Measured at standard conditions (0°C, 101.325 kPa) |
| Compression Medium | Natural gas / Mixed refrigerant / CNG | Combustible gas streams, BOG, and hydrocarbon vapours |
| Discharge Pressure | 0.1 – 32.00 MPa | Model-dependent; contact us for specific pressure ratings |
| Driver Power | 5.5 – 8000 kW | Electric motor or gas engine drive configurations available |
| Piston Force | 1.5 – 150 T | Determines structural frame class and foundation loads |
| Machine Type | M, D, P, L, Z types | Cylinder arrangement varies by flow, pressure, and footprint |
| Compliance / Certifications | CE / UKCA / ATEX / PED | UK PSSR 2000, DSEAR documentation available on request |
| Cooling System | Air-cooled / Water-cooled | Specified per project ambient and utility conditions |
* For exact performance curves, MTTF data, or model-specific dimensional drawings, email [email protected]
How These Compressors Work & Where They Are Used
Reciprocating Piston Compression
The majority of models in this range use balanced-opposed or L-type piston-cylinder arrangements. Gas enters the suction manifold during the piston’s return stroke and is compressed to the target discharge pressure during the forward stroke. Multi-stage configurations cool the gas between stages using intercoolers, reducing work input and preventing thermal degradation of valve seats and piston rings. Valve materials are selected based on gas composition — stainless steel or titanium plates are standard for hydrocarbon streams.
Diaphragm Compression (BOG)
The D186H70-220 diaphragm BOG compressor operates on a hydraulically actuated metallic membrane that separates the hydraulic fluid from the process gas entirely. This creates a hermetically sealed gas path — critical for LNG boil-off recovery where even trace quantities of lubricant can foul the re-liquefaction heat exchangers or violate product quality agreements. The diaphragm assembly is inspection-accessible without removing the compressor from the piping system.
Typical UK Application Scenarios
These machines are installed across a variety of UK and European energy projects: onshore LNG peak-shaving plants, industrial gas distribution terminals, offshore platform gas lift and injection systems, LNG bunkering facilities at UK ports, and chemical plant refrigeration loops where hydrocarbon mixed refrigerants replace CFC-based systems. Each installation is subject to site-specific HAZOP and ATEX zoning documentation which our engineering team can support.
Why UK Plant Engineers Specify Our LNG Compressors
ATEX-Ready Hazardous Area Design
Every machine in the LNG compressor range is designed from the ground up for Zone 1 and Zone 2 classified areas. Electrical components, instrumentation, and control panels are specified to IECEx/ATEX Group IIA/IIB standards, meeting UK DSEAR 2002 requirements for facilities handling flammable gases above their lower explosive limit.
Pressure Range Up to 32 MPa
A discharge pressure ceiling of 32 MPa means these compressors cover the full spectrum of LNG plant duties — from low-pressure BOG recovery at sub-atmospheric inlet conditions all the way to high-pressure gas injection and cascade refrigerant compression. This eliminates the need to source separate equipment from different vendors for different pressure duties within one plant.
Full Customisation & Aftermarket Support
No two LNG plants are identical. Our applications engineering team reviews your process data sheet, utility conditions, and plot plan to produce a matched compressor configuration — including cylinder sizing, valve trim, crankshaft material, piston rod seal arrangement, and lube oil system design. Spare parts kits, field commissioning, and remote diagnostics are available to UK buyers through our European technical support network.
8000 kW Drive Power Range
With driver power extending to 8000 kW, the range accommodates everything from compact satellite LNG units to full-scale baseload liquefaction trains. VFD-compatible designs allow throughput modulation in response to feed gas supply variation or demand fluctuations at regasification terminals, supporting UK grid balancing objectives in a renewables-heavy electricity mix.
Also Available: Industrial Screw Air Compressors
For UK industrial facilities requiring instrument air or plant air outside the LNG process boundary, our PM VSD screw compressor range provides class-leading energy efficiency at site utility pressures. These units deliver oil-free quality air at variable flow, adapting output to actual demand and cutting electricity costs by up to 35% compared to fixed-speed alternatives.
90kW PM VSD Screw Air Compressor CM90PVF — Engineered for UK Industry
Permanent magnet variable speed drive screw compressor delivering consistent pressure at varying demand. Suitable for UK manufacturing sites operating at 7–10 bar utility air requirements.
110kW PM VSD Screw Air Compressor for UK Industrial Operations
Higher-capacity variant for demanding process air duties in UK food processing, automotive, and chemical manufacturing — where downtime carries significant production cost penalties.
Customer Success — LNG Compressors in the Field
Real installations. Verified outcomes.
BOG Compressor Retrofit Reduces Flaring by 94% at Scottish Terminal
A gas distribution terminal near Aberdeen was experiencing unacceptable boil-off losses from its cryogenic storage tanks during summer months when regasification demand dropped and storage levels remained high. The terminal was venting and flaring boil-off gas (BOG) rather than recovering it, incurring both commodity losses and increasing regulatory pressure from the Scottish Environment Protection Agency (SEPA). The plant manager engaged our engineering team to evaluate replacement of the existing ageing reciprocating BOG compressor — a unit that was undersized for the current storage inventory — with the DW-22/25 BOG Compressor. Following a detailed process audit and compressor sizing calculation against the terminal’s maximum BOG generation rate of 18 Nm³/min at 0.05 MPa suction, we supplied and commissioned the DW-22/25 within an eleven-month EPC cycle. Post-commissioning measurements confirmed a 94% reduction in vented and flared BOG, with the recovered gas being reinjected into the high-pressure send-out header. The terminal operator reported annual gas recovery savings exceeding the full capital cost of the compressor package within the first twenty months of operation.
We specified the 4MW-36/24-70 for our new liquefaction module after an extensive vendor evaluation. The unit arrived with a complete CE documentation package and ATEX certificates that satisfied our UK Notified Body without any additional engineering queries. Commissioning was completed in three weeks — ahead of schedule.
Our plant in the East Midlands has two of the DW-30/15-52 units running in parallel duty-standby on feed gas. They have clocked over 14,000 hours each since commissioning with no unplanned shutdowns. The spare parts response from their European depot is genuinely impressive — critical wearing parts arrive next working day.
We purchased the LW-51/6 Raw Material Air Compressor for our ASU pre-treatment section. What sold us was the combination of a competitive unit price and the vendor’s willingness to provide a fully customised valve specification suited to our feed air quality — which has a notably high relative humidity during UK winter months. Exactly the kind of application engineering that differentiates a real manufacturer from a catalogue reseller.
Manufacturing Capability & Bespoke Engineering
🏗️ Heavy-Duty Manufacturing Infrastructure
Our production facility spans over 80,000 m² and operates CNC machining centres, precision honing lines, and hydrostatic test rigs capable of applying pressures up to 48 MPa. Frame castings and forged crankshafts are produced in-house, eliminating the supply chain variability that affects many third-party assemblers. All welds on pressure-bearing components are carried out by coded welders and subject to 100% radiographic or ultrasonic inspection.
🔩 Full Customisation Service for UK Buyers
We do not offer catalogue compressors for LNG duty. Every order is preceded by a process review meeting — conducted in English with our UK-facing technical sales team — where your gas composition, operating envelope, utility conditions, and plot plan are used to configure a purpose-built machine. Customisable parameters include cylinder bore and stroke, number of stages, inter- and aftercooler configuration, pulsation dampener sizing, base-frame design, driver selection, and instrumentation specification. We also support integration of condition monitoring systems compatible with UK plant DCS platforms including Honeywell, Emerson, and Siemens.
📦 FAT, Shipping & UK Commissioning
Factory Acceptance Tests are conducted with the buyer’s inspection team (in person or via live video link) against a mutually agreed test protocol. Machines are skid-mounted, pre-piped, and pre-wired to reduce on-site installation time. We coordinate shipping to UK ports — typically Immingham, Teesport, or Southampton depending on destination — and can provide site supervision for mechanical installation and commissioning through our European service partners.
Frequently Asked Questions
Voice-search and conversational queries from UK plant engineers and procurement teams.
Which natural gas compressor models are suitable for LNG liquefaction plants operating in the United Kingdom and what are typical lead times for delivery? +
All seven models in our LNG compressor range — including the DW-30/15-52, 4MW-36/24-70, DW-21.4/2.9-23, and DW-22/25 — are suitable for UK LNG facilities and carry CE and UKCA marking. Standard lead times from order placement to factory acceptance test range from 18 to 32 weeks depending on machine size and customisation level. Contact our team for a project-specific schedule.
How much does a BOG compressor cost for a UK LNG terminal and can you provide a budgetary price before a full technical enquiry? +
BOG compressor pricing depends heavily on flow rate, suction pressure, discharge pressure, ATEX category requirement, and skid scope (bare shaft, package, or fully integrated). We can provide a budgetary price range within 5 working days of receiving a one-page process data sheet. Email [email protected] with your BOG rate and conditions to start the conversation.
What certifications do your LNG compressors hold and are they compliant with UK DSEAR and PSSR 2000 regulations for hazardous area installations? +
Yes. All machines are designed to comply with UK PSSR 2000 (Pressure Systems Safety Regulations) and DSEAR 2002 (Dangerous Substances and Explosive Atmospheres Regulations). Documentation provided includes CE/UKCA Declaration of Conformity, ATEX certificate for electrical components (IECEx-equivalent), materials certification to EN 10204 3.1, and hydrostatic test certificates. We work with UK Notified Bodies and can adapt documentation to specific client requirements.
Where can I find a reliable supplier of diaphragm BOG compressors for high-purity LNG applications in Scotland or the North of England? +
The D186H70-220 diaphragm-type BOG compressor is our recommended solution for high-purity LNG vapour recovery where zero oil contamination is required. We supply this model to facilities across the UK including Scotland, the Humber estuary, and South Wales. Our European logistics partners handle export documentation and coordinate delivery to UK terminal sites on a project-by-project basis.
How does the mixed refrigerant compressor handle fluctuating suction conditions in an SMR liquefaction cycle during winter operating periods in the UK? +
The 4MW-48/2.6-29 is designed with suction pressure and temperature flexibility built into the cylinder sizing. During UK winter conditions, when ambient temperature drops improve compressor volumetric efficiency and refrigerant density changes, the machine can be unloaded via stepless capacity control or adjustable clearance pockets to maintain stable discharge conditions without risking liquid carry-over into the cylinders. Contact us for winter/summer performance curve sets.
What is the difference between the DW-22/25 and the D186H70-220 BOG compressor and which one should I specify for my LNG storage tank application? +
The DW-22/25 is a piston-type BOG compressor with a lubricated cylinder — suited to large tank farms where throughput is the primary constraint and minor oil carry-over to the downstream system is tolerable or manageable through coalescing filters. The D186H70-220 is an oil-free diaphragm design — the right choice when downstream equipment (heat exchangers, molecular sieves, or send-out gas specs) cannot tolerate any lubricant. We recommend the D186H70-220 for high-purity or re-liquefaction duty and the DW-22/25 for high-flow gas return applications.
Ready to Specify Your LNG Compressor?
Send us your process data sheet or outline specification. Our applications engineering team will respond within 24 hours with a preliminary machine recommendation and indicative pricing — no commitment required.
edit by gzl