Inlet profile
Trailer/storage pressure over time, composition and temperature, or the actual pipeline supply. State the station source and configuration.
Bengbu
Bengbu Lianhe: CNG station, gas transfer and nitrogen interfaces
Compare actual model duties and package scope, then agree the gas-path, controls and technical acceptance.
BENGBU LIANHE COMPRESSOR
Three compressor tasks, three different gas interfaces
蚌埠市联合压缩机制造有限公司 describes a 2002 establishment and design, manufacture, sales and service for special-gas compressors. Its displayed historical business-license copy gives 4 July 2002 and a Huaiyuan economic-development-zone location in Anhui. This is a displayed document rather than a fresh corporate-status check.
The China General Machinery Industry Association compressor branch lists the company as an ordinary complete-machine member, in an entry dated 12 April 2021. Membership provides an industry identity reference; it is not equipment certification.
VF / VFD · RECIPROCATING CNG STATION EQUIPMENT
Compare the duty and the installed package separately
| Model | Duty and motor | Envelope | Mass |
|---|---|---|---|
| VF-0.32/(30-200)-250 | 1500 Nm³/h 3–20 → 25 MPa 75 kW | 5538 × 2350 × 2000 mm | 5.5 t |
| VFD-0.32/(30-200)-250 | 1500 Nm³/h 3–20 → 25 MPa 75 kW | 5538 × 2350 × 2438 mm | 9.5 t |
The table’s air-cooled cell spans all six model rows. Obtain the actual foundation, enclosure, utility and service-access drawings; the suffix and mass difference do not by themselves establish the complete package scope.
Clarify the source’s inlet limit and two flow labels
The product header prints 0.32 m³/min and 0.3–20 MPa inlet. The detailed table prints 1500 Nm³/h and 3–20 MPa. The inlet limit and reference bases must be reconciled in the signed performance sheet; the header value is not converted into the table value.
Demand and sequencing
Required delivery pressure, average/peak dispensing, storage interfaces and sequencing. Request capacity and package-input curves across changing inlet conditions.
Installation and control
Electrical supply, cooling, start/stop limits, separation/vents, protection and hazardous-area scope. Agree actual interfaces and acceptance tests.
NAMED MODELS · FAMILY TABLES · GAS-PATH SELECTION
Keep each performance sheet attached to its own model
DWF-5.4/(1.7-3.45)-21
- Gas
- Natural gas
- Header flow
- 5.4 m³/min; reference not fully stated
- Inlet → discharge
- 0.17–0.345 → 2.1 MPa
- Named-model motor and envelope
- Obtain the offered sheet; do not borrow another table row
The NG description calls the gas compression non-lubricated. This describes the gas-path scope, not every drive/bearing mechanism. Air, water or mixed cooling and package forms are selected for the project.
It describes stops/alarms for low oil/water pressure, high temperature, low inlet and high discharge pressure. Setpoints, instruments and remote-control interfaces need the offered control schedule.
DWF duty and separate natural-gas table examples →Nitrogen boosting is a separate gas duty
The instrument/air-separation solution distinguishes air feeding instruments, PSA/membrane systems and boosters handling output gases. A compressor here is not a nitrogen generator.
- DW-1.0/5-13 header
- Nitrogen · 1.0 m³/min · 0.5 → 1.3 MPa
- Separate VWF-2.86/5-16 row
- Nitrogen · 895 Nm³/h · 0.5 → 1.6 MPa · 55 kW · 740 rpm · air-cooled
- VWF installation
- 3200 × 2200 × 1750 mm · approximately 3500 kg
The special-gas page offers oil-free or oil-lubricated arrangements by requirement. Define actual purity/carryover and lubrication scope; do not inherit NG gas-path wording automatically.
Instrument-air and nitrogen interfaces →
PROJECT REVIEW → DESIGN PROPOSAL → TECHNICAL AGREEMENT
Use the manufacturer’s design process to close the interfaces
Lianhe’s pre-sale sequence covers project information, technical discussion, a proposed equipment design and a commercial contract with a technical agreement. Define the following boundaries before confirming the order.
- Gas and performance: composition/purity, temperature and suction envelope, normal/reference volume, delivery pressure, base/peak demand, contaminants/entrained liquid and operating cycle.
- Package and safety: materials/seals, lubrication, conditioning/cooling, vent/recovery routing, controls/interlocks, hazardous-area requirements and actual foundation/utility interfaces.
- Acceptance and ownership: offered performance and package input, P&ID, drawings, installation/service clearances, factory/acceptance tests, delivered manuals, wear parts and training/commissioning responsibility.
For feed air, specify drying/filtration at the instrument or generator interface. For nitrogen boosting, supply the generator outlet conditions and required storage/process delivery. Gas equipment should not inherit food-contact or other process suitability from generic application text.
Questions for a Lianhe technical proposal
Is the 1500 Nm³/h CNG row a fixed flow at every inlet pressure?
Obtain a capacity curve across the agreed inlet envelope. The source also has a header/table inlet discrepancy and distinct flow labels that need reconciliation in the offered sheet.
Can the 110 kW NG table row be used for DWF-5.4?
No. It belongs to DW-4.9/(1.5-2.5)-22. The DWF-5.4 header gives flow and pressure; obtain its actual offered motor, package input and envelope.
Does nitrogen boosting include gas generation?
The booster handles a defined inlet gas. Specify the generator outlet and treatment interfaces separately from compressor delivery pressure and acceptance purity.
Send the gas task and the site interfaces
Specify CNG station, DWF natural-gas transfer or nitrogen/instrument-air duty, with suction profile, delivery demand and acceptance scope.
Prepare a Lianhe enquirySpecification pages
Specification pages for Lianhe product types
| Duty | Write on the RFQ |
|---|---|
| Piston compressor manufacturers in China | Piston packages in China run from workshop portables to API-style process recips. Those are not one RFQ. Write pressure stages and whether the air must be oil-free. |
| Process gas compressor manufacturers in China | Process gas is not plant air. Molecular weight, suction pressure, discharge pressure and flow size the machine. A kW from an air catalogue is unused. |
Product information
Information reviewed 2026-10-08. Specifications apply only to the models and conditions stated.
Lianhe: Compare actual model duties and package scope, then agree the gas-path, controls and technical acceptance.
Open RFQ