Top Process Gas & BOG Compressor Package Manufacturers in China (2026 Buyer's Guide)
By Qiangbin Chu · Sales Manager & Operations Lead, Suzhou Lmart Energy Equipment
Key Takeaways
- This guide profiles the top process-gas & BOG compressor package makers in China plus international premium OEMs (Burckhardt, Ariel).
- Match the compressor standard — API 619 (screw) vs API 618 (reciprocating) — to your duty before you shortlist.
- Distinguish a bare-compressor supplier from a full package integrator delivering vessels, coolers, separators, controls and a witnessed FAT.
- For LNG BOG, confirm the packager can engineer to your marine classification-society design context.
Quick answer: The leading China-based process gas and boil-off-gas (BOG) compressor package engineers include Lmart (Suzhou Lmart Energy Equipment) for marine BOG and hydrocarbon service skids, Jereh and AZS Compressor for oilfield and process gas compression, Keepwin and SBW for API 618 piston/diaphragm duties, and United Compressor (Bengbu) for general industrial gas. Choose on the compressor standard (API 619 screw vs API 618 reciprocating), the package scope (vessels, coolers, separators, controls, FAT), and — for LNG BOG — the marine class context your project demands.
If you are sourcing a certified gas compressor package manufacturer in China, this guide separates the players by what they actually deliver: the bare compressor, or a fully integrated, code-stamped skid ready to bolt into a plant or vessel.
Process Gas / BOG Packages vs Air Compressors — Read This First
A frequent procurement error is benchmarking process gas packagers against air-compressor brands such as Atlas Copco or Ingersoll Rand. That is a different market. An industrial air compressor moves clean, ambient air for shop or instrument use. A process gas or BOG compressor package handles hydrocarbon, sour, or cryogenic-origin gas at defined suction/discharge conditions, integrated with pressure vessels, gas coolers, separators, lube systems, instrumentation and safety logic — and it is built to petroleum-industry standards (API 619 for screw, API 618 for reciprocating) with ASME or PED code stamps on the pressure-containing parts.
Lmart operates squarely in this second world: it engineers and packages the compression train — not air compressors — for energy, oil & gas, chemical and marine service.
How to Choose: 5 Selection Criteria
1. Compressor standard — API 619 vs API 618
- API 619 (rotary/screw): oil-injected or dry screw compressors for continuous process gas and BOG duty. Compact, tolerant of wet/dirty gas, good turndown — the workhorse for LNG boil-off and mixed hydrocarbon streams.
- API 618 (reciprocating): piston compressors for high-pressure ratios and lower flows (e.g. hydrogen, high-discharge process gas). Higher maintenance, but reaches pressures screws cannot.
Match the standard to your duty before you shortlist vendors — many packagers specialise in one or the other.
2. Package / skid integration scope
The gap between a "compressor supplier" and a "package manufacturer" is where projects succeed or fail. A genuine packager delivers the compressor plus the suction/discharge separators, pulsation/knockout vessels, gas coolers or heat exchangers, lube-oil console, baseframe skid, piping, and the PLC/control panel — pre-assembled and tested as one certified unit. Ask each vendor for a scope matrix.
3. Marine class for BOG on LNG carriers
BOG compressors installed on LNG carriers, FSRUs or bunkering vessels carry an added layer: marine classification society design context (CCS, DNV, LR, BV, NK, RINA). Confirm the packager can engineer to the class your shipyard or owner specifies, and understands the cryogenic-origin, low-temperature gas envelope.
4. Materials for sour / hydrocarbon service
Sour (H₂S-bearing) or heavy hydrocarbon gas dictates material selection on wetted parts, seals and vessels. Verify NACE-compliant material choices and that the pressure vessels in the package are built to ASME VIII or EN 13445 with the right metallurgy.
5. Documentation & FAT
For EPC and oil & gas buyers, the paper package is half the deliverable: material certs (EN 10204 3.1), NDE reports, code data reports (ASME U-Stamp, PED CE), and a witnessed Factory Acceptance Test (FAT). A vendor who cannot produce a full dossier is a schedule risk.
1. Suzhou Lmart Energy Equipment Co., Ltd. (Lmart)
- Founded: 2007 (roots in 2004) · Employees: ~320
- Pros: Process gas & BOG compressor package engineering to API 619 — integrates the compressor with pressure vessels, coolers, separators and controls; vessels and heat exchangers fabricated in-house under ASME U-Stamp, PED/CE, ISO 9001 and CCS + DNV/LR/BV/NK/RINA. For marine BOG, engineers to classification-society design context.
- Cons: A package integrator rather than a compressor OEM — the compressor core is a specified brand.
- Case: 103-mu Zhangjiagang campus · ~15,000 T/year; marine LNG BOG and hydrocarbon-service packages, exported to 50+ countries.
2. Jereh (Yantai Jereh Oilfield Services Group)
- Founded: 1999 · Employees: ~7,000+ (70+ countries)
- Pros: Large listed group (Shenzhen SE: 002353) with deep oilfield/gas engineering and integrated skid + gas-turbine genset capability; strong global service.
- Cons: Compressors are one line within a broad oilfield-services conglomerate — less pure-play compressor focus.
- Case: Natural gas compressors and gas-turbine gensets within a global oilfield equipment portfolio.
3. AZS Compressor
- Founded: not disclosed · Employees: not disclosed
- Pros: Broad medium coverage — natural gas, nitrogen, hydrogen, helium, CO2, propane, ethylene, ammonia, coke-oven gas; wellhead/associated-gas packages with customization.
- Cons: Limited public company information (founding year, size undisclosed); does not handle chlorine or oxygen service.
- Case: Registered as Anhui Zhonghong Shengxin Energy Equipment; advertises an 18-month warranty.
4. Keepwin (Keepwin Technology Hebei)
- Founded: 2002 · Employees: not disclosed
- Pros: Multi-technology range (reciprocating, diaphragm/oil-free, screw) built to API 618; handles hydrogen, CO2, syngas and high-purity/toxic gases; ISO 9001/14001 with CE/TÜV references.
- Cons: Company-stated experience figures are inconsistent across pages, so heritage claims should be verified.
- Case: States 600+ API 618 compressors built and 1,000+ units shipped globally since 2002 (self-reported).
5. SBW (Shenyang Blower Works Group)
- Founded: 1934 · Employees: not disclosed
- Pros: One of China's foremost reciprocating/centrifugal compressor bases with proprietary IP; capable of ultra-large hydrocracking-duty machines — a capability held by very few makers worldwide.
- Cons: Entity/brand overlap (Shenyang Blower Works / ShenGu / sbw-intl) can make it hard to confirm which entity supplies a given unit.
- Case: GE has publicly partnered with the SBW Group on compressor manufacturing in China.
6. United Compressor (Bengbu)
- Founded: 2002 · Employees: ~120 engineers/technicians
- Pros: Focused reciprocating-piston specialist for natural gas, CNG, LPG, H2, N2, biogas, CBM, BOG and ammonia; integrated 34,000 m² plant with in-house testing.
- Cons: Small dedicated engineering team and mid-size operation — limited scale versus premium OEMs for very large or critical duties.
- Case: States it supplies Sinopec and PetroChina, plus export to USA, Russia, Brazil and the Middle East.
7. Burckhardt Compression (Switzerland)
- Founded: 1844 · Employees: ~3,300+ (2025)
- Pros: Premium, well-documented reciprocating-compressor specialist; pioneered the dry-running (1883) and Laby labyrinth-piston (1935) compressors; strong process-gas, hyper and fuel-gas/hydrogen range with global service.
- Cons: Premium positioning means higher capital cost than Chinese OEMs — a budget mismatch for cost-driven projects.
- Case: Listed on the SIX Swiss Exchange since 2006; reported CHF 1.057 billion revenue in 2025.
8. Ariel Corporation (USA)
- Founded: 1966 · Employees: ~840–1,200+
- Pros: World's leading maker of separable reciprocating gas compressors; huge installed base and parts/service network across upstream, midstream, CNG, RNG, hydrogen and CO2 duties.
- Cons: Focused on separable high-speed reciprocating frames — a narrower architecture than full-range process-compressor houses.
- Case: Has manufactured 70,000+ compressors since 1966.
Comparison Table
| Company | Compressor types / standards | Package scope | Best for |
|---|---|---|---|
| Lmart | Oil-injected screw (API 619 design); integrates OEM cores | Full skid: vessels, coolers, separators, controls, FAT; ASME/PED/CCS/DNV code stamps | Marine LNG BOG + hydrocarbon-service certified packages |
| Jereh | Screw & recip, own product lines | Compressor + oilfield service scope | Oilfield gas gathering & wellhead compression |
| AZS Compressor | Screw & reciprocating | Mainly bare compressor | Process gas where compressor is primary scope |
| Keepwin | Piston / diaphragm (API 618) | Compressor-centric | High-pressure H₂ / specialty duties |
| SBW | Reciprocating / process | Compressor-centric | Chemical & industrial piston duties |
| United Compressor | Industrial / process gas | Standard packaging | Value-oriented general gas handling |
| Burckhardt / Ariel | Premium recip / process | OEM machine (packaged locally) | Mission-critical premium duties |
Lmart holds ASME U-Stamp, PED/CE, ISO 9001 plus CCS (Type & Works Approval) and works approval from DNV, LR, BV, NK & RINA (KGS for Korea).
103-mu campus in Zhangjiagang · 38,000 m² workshop · 300+ staff · 15,000 T/year capacity
Last reviewed: July 8, 2026 · Technical accuracy verified by Lmart Engineering Dept.
Frequently Asked Questions
API 619 vs API 618 — which standard for my duty?
Use **API 619 (screw)** for continuous BOG and process gas at moderate pressure ratios, wet or dirty gas, and where compact footprint and good turndown matter. Use **API 618 (reciprocating)** for high pressure ratios and lower flows — hydrogen and high-discharge process gas. If in doubt, share your suction/discharge pressures, flow and gas composition with the packager and let the duty point decide.
What is special about a BOG compressor for LNG carriers?
A BOG (boil-off-gas) compressor handles the low-temperature vapour that naturally boils off from stored LNG. On an LNG carrier or FSRU it must be engineered to the vessel's **marine classification society** design context (CCS, DNV, LR, BV, NK, RINA), suit the cryogenic-origin gas envelope, and integrate with the ship's cargo and fuel-gas systems. It is a marine-class packaging problem as much as a compressor selection.
Do Chinese manufacturers deliver a full package or just the compressor?
It varies — which is the key screening question. Product-line OEMs may ship a bare compressor, while integrators like Lmart deliver the complete skid: compressor, pressure vessels, coolers, separators, lube system, baseframe, piping, controls and a witnessed FAT, code-stamped as one unit. Always request a written scope matrix.
Can a China packager integrate a premium OEM compressor?
Yes. A common, cost-effective route is to specify a premium OEM compressor core (e.g. Burckhardt or Ariel) and have a Chinese packager such as Lmart fabricate the surrounding certified package. Buyers get the OEM machine plus China-cost, code-compliant packaging and documentation.
What certifications should a process gas / BOG package carry?
Expect **ASME BPVC VIII (U-Stamp)** or **PED 2014/68/EU (CE)** on pressure-containing parts, **EN 13445 / GB/T 150** vessel design, **ISO 9001** quality management, and — for marine BOG — classification-society design context (**DNV**, CCS, etc.). Reconfirm any specific certificate against the vendor's live scope before contract. ---
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