LPG / Acetylene / Tank Truck Loading & Unloading Compressors

LPG / Acetylene / Tank Truck Loading & Unloading Compressors

Oil-free, water-cooled skid compressors for LPG, propane, butane, ethylene, liquid ammonia tank truck unloading and transfer — plus dissolved acetylene cylinder filling and BDO / PVC / vinyl acetate chemical process acetylene. National acetylene compressor standard drafter. API 618.

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LPG / Acetylene / Tank Truck Loading & Unloading Compressors

50+ years manufacturing oil-free, water-cooled, skid-mounted tank truck compressors for LPG, propane, butane, ethylene, liquid ammonia transfer and residual recovery — plus dissolved acetylene cylinder filling and chemical process acetylene compression. National acetylene compressor standard drafter.

LPG Flow: 50–1,000 Nm³/hAcetylene: 20–1,000 Nm³/hLPG Pressure: to process req.Acetylene: 0.1–4.0 MPa

Product Overview

Ever Power has 50+ years of experience in tank truck compressor manufacturing for combustible gas and chemical liquid transfer applications. The oil-free, water-cooled, skid-mounted tank truck compressor series covers LPG (liquefied petroleum gas), C4 fraction, propane, propylene, butane, ethylene, and liquid ammonia unloading, loading, tank-to-tank transfer, and residual liquid recovery. Low-speed explosion-proof direct-drive motors, water-cooled or air-cooled (adjustable) cooling, VFD or fixed-speed operation, and integrated skid packaging give these units long compressor and wear-part service life, stable operation, and low maintenance cost.

For acetylene, Ever Power is the drafter of the Chinese national standard JB/T 9103-2015 for reciprocating acetylene compressors and has decades of specialist experience. The acetylene compressor range covers high-pressure dissolved acetylene cylinder filling (up to 2.50 MPa), medium-pressure chemical process acetylene for BDO, PVC, and vinyl acetate production (0.1–2.0 MPa), and acetylene mixed gas compression for multi-component process streams. All products comply with API 618 and applicable national standards.

Tank Truck Compressor — Key Technical Parameters

50 – 1,000

Flow (Nm³/h)

Meets process req.

Discharge Pressure

3 – 220

Motor Power (KW)

1.5 – 8 T

Piston Force

LPG / C4 / Propylene / Liquid ammonia

Media

Z / P / D / L

Frame Types

Acetylene Compressor — Key Technical Parameters

20 – 1,000

Flow (Nm³/h)

0.1 – 4.0

Discharge Pressure (MPa)

5.5 – 800

Motor Power (KW)

1.5 – 25 T

Piston Force

Pure C₂H₂ / C₂H₂ mixed gas

Compression Medium

Z / M / D / P / L

Frame Types

Tank Truck Compressor — Representative Models

LPG / C4 / Propane / Butane / Ethylene / Liquid ammonia transfer compressors · Explosion-proof
Model Gas Type Notes
ZW-3/16-24 Propane 3-col 3-stage; standard propane unloading
ZW-2.5/16-24 Propane 3-col 3-stage; compact propane unloading
ZW-3/12.7-18.7 Propane 3-col 3-stage; variable pressure propane
ZW-5/2.8-8.8 Butane 3-col 3-stage; butane unloading & transfer
DW-12/10-16 LPG / C4 2-col 2-stage; large-volume LPG/C4
DW-13.8/10-16 LPG / C4 2-col 2-stage; large-capacity LPG/C4
LW-6.85/16-24 Liquid ammonia 2-col 2-stage; steel construction; NH₃
ZW-3/16-14 Ethylene / Propylene 3-col 3-stage; mixed C₂/C₃ service
LPG / Acetylene / Tank Truck Loading & Unloading Compressors — Tank Truck Compressor — Representative Models

Dissolved Acetylene Cylinder Filling Compressor Specifications (up to 2.50 MPa)

High-pressure dissolved acetylene cylinder filling · 2.50 MPa · Inlet pressure: atmospheric
No. Model Pattern Flow (m³/h) Discharge Pressure (MPa) Power (KW) Weight (t)
1 2Z-0.34/25 2-col 2-stage 20 2.50 5.5 1.80
2 2Z-0.67/25 2-col 2-stage 40 2.50 11 1.80
3 2Z-0.8/25 2-col 2-stage 50 2.50 11 1.80
4 2Z-1/25 2-col 2-stage 60 2.50 15 2.60
5 2Z-1.34/25 2-col 2-stage 80 2.50 18.5 2.60
6 2Z-1.5/25 2-col 2-stage 90 2.50 18.5 2.60
7 2Z-1.67/25 2-col 2-stage 100 2.50 22 2.60
8 2Z-1.82/25 2-col 2-stage 110 2.50 22 2.60
9 2Z-2/25 2-col 2-stage 120 2.50 30 2.80
10 2Z-2.34/25 2-col 2-stage 140 2.50 30 4.20
11 2Z-2.67/25 2-col 2-stage 160 2.50 37 4.20
12 3Z-2.5/25 3-col 3-stage 180 (approx.) 2.50 37 4.20
13 3Z-3.34/25 3-col 3-stage 200 2.50 45 4.50
14 3Z-4.17/25 3-col 3-stage 250 2.50 55 4.50
15 3Z-4.5/25 3-col 3-stage 270 2.50 55 4.50
16 3Z-5/25 3-col 3-stage 300 2.50 65 4.80

Medium-Pressure Chemical Process Acetylene Compressor Specifications (0.1–2.0 MPa)

Chemical process acetylene · BDO / PVC / Vinyl acetate / Acetic acid ester synthesis · 0.1–2.0 MPa
No. Model Pattern Flow (m³/h) Discharge Pressure (MPa) Power (KW) Weight (t)
1 2Z-0.34/8 (6) 2-col 2-stage 20 0.80 (0.60) 3 1.65
2 2Z-0.67/8 (6) 2-col 2-stage 40 0.80 (0.60) 5.5 1.65
3 2Z-0.8/8 (6) 2-col 2-stage 50 0.80 (0.60) 7.5 1.65
4 2Z-1/8 (6) 2-col 2-stage 60 0.80 (0.60) 7.5 2.40
5 2Z-1.34/8 (6) 2-col 2-stage 80 0.80 (0.60) 11 2.40
6 2Z-1.5/8 (6) 2-col 2-stage 90 0.80 (0.60) 13 2.40
7 2Z-1.67/8 (6) 2-col 2-stage 100 0.80 (0.60) 15 2.60
8 2Z-1.82/8 (6) 2-col 2-stage 110 0.80 (0.60) 15 2.60
9 2Z-2/8 (6) 2-col 2-stage 110 0.80 (0.60) 22 2.60
10 2Z-2.16/8 (6) 2-col 2-stage 130 0.80 (0.60) 22 3.80
11 2Z-2.34/8 (6) 2-col 2-stage 140 0.80 (0.60) 22 3.80
12 2Z-2.67/8 (6) 2-col 2-stage 160 0.80 (0.60) 22 3.80
13 2Z-3/8 (6) 2-col 2-stage 180 0.80 (0.60) 37 4.20
14 2Z-3.34/8 (6) 2-col 2-stage 200 0.80 (0.60) 37 4.20
15 2Z-4.17/8 (6) 2-col 2-stage 250 0.80 (0.60) 45 4.50
16 2Z-4.5/8 (6) 2-col 2-stage 270 0.80 (0.60) 45 4.50
17 2Z-5/8 (6) 2-col 2-stage 300 0.80 (0.60) 45 4.50
18 L-2.5/8 (6) 2-col 2-stage 200 0.80 (0.60) 30 3
19 L-3.2/8 (6) 2-col 2-stage 300 0.80 (0.60) 37 4.50
20 L-5.1/8 (6) 2-col 2-stage 300 0.80 (0.60) 45 4.50
21 L-6.67/8 (6) 2-col 2-stage 400 0.80 (0.60) 75 4.50
22 L-8.3/8 (6) 2-col 2-stage 500 0.80 (0.60) 90 4.50
23 L-10/8 (6) 2-col 2-stage 600 0.80 (0.60) 132 6.50
24 DW-70/2 2-col 1-stage 4,000 0.20 220 17
25 DW-13/16.5 2-col 2-stage 90 (approx.) 1.65 (inlet≈0) 132 —
LPG / Acetylene / Tank Truck Loading & Unloading Compressors — Medium-Pressure Chemical Process Acetylene Compressor Specifications (0.1–2.0 MPa)

Mixed Gas & Large-Capacity Chemical Acetylene Models

Model Application Flow Pressure (MPa) Drive
4M-7.3/1-16.5 Mixed acetylene gas 7.3 m³/min 1.0–16.5 Direct
D-20/12 Mixed acetylene gas 20 m³/min 1.20 Direct
D-25/13.5 Mixed acetylene gas 25 m³/min 1.35 Direct
L-3.4/6 Acetylene — chemical process 3.4 m³/min 0.60 Belt
L-5/8 Acetylene — chemical process 5 m³/min 0.80 Belt
2Z-2.67/25 (direct) Dissolved acetylene filling 2.67 m³/min 2.50 Direct
3Z-4.5/25 (belt) Dissolved acetylene filling 4.5 m³/min 2.50 Belt
3Z-3.34/25 (belt) Dissolved acetylene filling 3.34 m³/min 2.50 Belt

Applications

LPG / Propane Tank Truck Unloading

Pressure-differential transfer of propane, butane, and LPG from road tankers to storage tanks at terminal and distribution depots.

️

C4 / Ethylene / Propylene Transfer

Liquid ethylene and propylene unloading from rail and road tankers at petrochemical plants. Mixed C₂/C₃ and C4 fraction service.

Liquid Ammonia Transfer

Steel-construction compressors for liquid ammonia tank truck unloading, loading, and tank-to-tank transfer at fertiliser and refrigeration ammonia terminals.

♻️

Residual Liquid & Heel Gas Recovery

Recovery of residual LPG, C4, and other liquids from near-empty road tankers before return to sender. Compressor creates pressure differential to fully drain tanks.

⚗️

Dissolved Acetylene Cylinder Filling

High-pressure C₂H₂ compression to 2.50 MPa for charging dissolved acetylene cylinders (acetone-saturated porous media) at acetylene filling stations.

BDO / PVC / Vinyl Acetate Production

Medium-pressure acetylene compression for 1,4-butanediol, polyvinyl chloride, and vinyl acetate monomer synthesis processes.

Acetate Ester Chemical Synthesis

Acetylene feed gas compression for acetic acid ester and specialty organic chemical synthesis plants.

Multi-Component Gas Compression

Mixed acetylene-containing gas streams in chemical plants where acetylene concentration and composition vary by campaign.

For natural gas and LPG infrastructure compression beyond tank truck duties, our Natural Gas / LNG / BOG Skid-Mounted Compressors cover wellhead, LNG plant, and CNG station compression requirements.
LPG / Acetylene / Tank Truck Loading & Unloading Compressors — Applications

Customer Case Studies

★★★★★

"We installed ZW-3/16-24 propane compressors at eight unloading bays. Transfer time per tanker dropped from 45 minutes to under 25 minutes. Residual liquid recovery rate improved from 82% to over 97% per tank."

China · LPG Terminal Operator

Propane tank truck unloading — 8 bays · 5.0 / 5

★★★★★

"We upgraded from belt-drive to direct-drive 2Z-1.67/25 units at our filling station. The lower speed reduced vibration noticeably, and first-stage valve life has extended from around 2,000 hours to over 5,500 hours in continuous filling service."

India · Dissolved Acetylene Gas Producer

Acetylene cylinder filling at 2.50 MPa · 5.0 / 5

★★★★☆

"The L-series acetylene compressors on our VCM synthesis train have handled feed gas composition variations between campaigns without requiring valve or seal adjustments. Downtime for planned maintenance runs to under 0.4% of annual operating hours."

South Korea · PVC Resin Manufacturer

Acetylene feed gas compression for VCM process · 4.0 / 5

LPG / Acetylene / Tank Truck Loading & Unloading Compressors — Customer Case Studies

Frequently Asked Questions

What is the difference between a tank truck unloading compressor and a transfer pump?
A compressor pressurises the vapour space above the liquid in the source tank, forcing liquid to flow to the destination tank by pressure differential — no moving liquid contact parts, no vapour-locking, suitable for near-empty source tanks. A liquid pump requires a flooded suction and struggles with near-empty conditions. Compressors are preferred for LP-gas tank truck unloading, residual liquid recovery, and cylinder filling station transfer where complete liquid transfer is required.
What safety certifications are required for propane unloading compressors?
For LPG and propane service, the compressor and its drive motor require IEC Ex or ATEX Zone 1 or Zone 2 certification depending on the installation classification. The skid must include gas detection sensors, automatic suction/discharge block valves, pressure relief valves to a safe vent, and anti-static earthing. National fire safety codes for LPG storage and handling also apply at the installation level.
What is the maximum operating pressure for dissolved acetylene cylinder filling?
Dissolved acetylene cylinder filling is limited to 2.50 MPa (at 15 °C reference temperature) in most regulatory frameworks, corresponding to approximately 1.7–2.0 MPa gauge at filling temperature. The high-pressure acetylene compressor models in this range are designed for discharge up to 2.50 MPa as the upper limit for dissolved acetylene service.
Can these compressors handle ethylene and propylene simultaneously?
Mixed ethylene/propylene service is available in specific models such as the ZW-3/16-14 ethylene/propylene unloading compressor. The gas composition must be declared at specification stage as it affects compressibility factor, molecular weight, and valve timing. Pure ethylene and pure propylene compressors are also available as separate models.
How is liquid ammonia transfer handled differently from LPG?
Liquid ammonia has significantly different thermodynamic properties and is highly toxic and corrosive to copper alloys. Ammonia transfer compressors use steel or cast iron wetted parts (no copper or copper alloys), dedicated ammonia-rated shaft packing, and require full respiratory protection protocols during maintenance. Gas detection must be calibrated for NH₃ sensitivity. Models like the LW-6.85/16-24 are specifically designed for liquid ammonia tank truck transfer service.
For pure ethylene compression in steam cracker or ethylene storage applications, our Coal Gas & Industrial Tail Gas Compressors include dedicated ethylene and mixed hydrocarbon process gas models.

Ready to Move Forward?

Provide your gas type (LPG, propane, butane, ethylene, ammonia, or acetylene), flow rate, transfer pressure, site classification zone, and any regulatory certifications required. Our engineering team will configure the appropriate skid package and return a complete technical proposal within 48 hours.

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