D Type Diaphragm Compressor
The D-type diaphragm compressor is specifically designed for high-purity, flammable, explosive, and rare gases, achieving leak-free and zero-contamination compression.
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Structural form |
D type, symmetrically balanced type |
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Piston stroke |
130mm～210mm |
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Maximum piston force |
40KN～160KN |
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Maximum exhaust pressure |
100MPa |
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Flow range |
30～2000Nm³/h |
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Motor power |
22KW～200KW |
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Crankshaft speed |
420rpm |
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Cooling method |
Water cooling/air cooling (optional) |
Product Features
The D-type diaphragm compressor is a positive-displacement gas compression unit designed for high-purity, high-pressure, and specialized process gas applications. It utilizes a diaphragm-sealed compression structure that effectively isolates the gas being compressed from hydraulic oil, lubrication systems, and the external environment, thereby minimizing the risk of contamination by oil, particulates, or external impurities.
This series is suitable for the pressurization, recovery, filling, and transport of inert gases such as nitrogen and argon. Depending on specific operational requirements, it can also be used to compress high-purity gases, rare gases, flammable and explosive gases, toxic and hazardous gases, corrosive gases, and other high-pressure gases.
The D-type diaphragm compressor is a positive-displacement compressor featuring a specialized design. A hydraulic system drives a metal diaphragm to undergo reciprocating flexural motion, causing the volume of the diaphragm cavity to change cyclically, thereby accomplishing gas intake, compression, and discharge.
Throughout the compression process, the gas comes into contact only with components compatible with the medium-such as the diaphragm, cylinder head, and gas piping-and does not directly contact the lubricating oil. This isolation-based compression method helps maintain gas purity and enhances sealing reliability, making it particularly well-suited for applications requiring strict purity standards.
Key Advantages
Efficient Compression for Enhanced Filling Efficiency
The diaphragm cavity features an optimized design that improves effective volume utilization and enhances volumetric efficiency. Combined with specialized diaphragm surface treatment, the equipment achieves high compression efficiency during stable operation, providing superior power support for storage tank pressurization and gas filling.
Superior Gas Purity Maintenance
The compression chamber is isolated from the hydraulic oil system by a diaphragm, ensuring the gas never comes into direct contact with lubricating oil during compression. This effectively eliminates the risk of oil contamination-often associated with traditional compression methods-when handling high-purity nitrogen, high-purity argon, and other cleanliness-sensitive media.
High-Integrity Sealing Design
The diaphragm compression structure confines the medium within a relatively isolated, hermetically sealed gas chamber, minimizing external leakage. This provides a reliable sealing foundation for the safe compression and transport of precious, flammable, explosive, toxic, or corrosive gases.
High Adaptability to Compression Ratios
The D-type diaphragm compressor supports multi-stage pressurization and high discharge pressures, making it ideal for gas handling systems that require boosting from low inlet pressures to high pressures for storage, filling, or downstream processes.
Stable and Reliable Hydraulic Lubrication System
The unit is equipped with an integrated oil supply and pressure regulation system that delivers clean, pressurized lubricating oil to the hydraulic cylinder and drive components. An optimized oil circuit design reduces friction and wear on moving parts, enhancing the stability of long-term, continuous compressor operation.
Relatively Low Maintenance Requirements
Key moving parts utilize pressure lubrication to ensure optimal lubrication conditions and minimize mechanical wear. With proper operation and regular inspection and maintenance, the risk of unplanned downtime caused by friction or inadequate lubrication is significantly reduced.
Safety Monitoring and Protection
The D-type diaphragm compressor can be configured with protective devices-such as alarms for diaphragm rupture or low lubricating oil pressure-to meet specific project requirements. If a diaphragm anomaly occurs or oil pressure drops below the set range, the system issues an immediate alert, enabling operators to quickly identify and address the issue.
For projects involving flammable, explosive, toxic, hazardous, or high-value gases, the system can be further configured with pressure, temperature, and flow monitoring, as well as interlocking control schemes, to enhance operational safety and automation levels.
Typical Applications
D-series diaphragm compressors are widely used in the following fields:
- Pressurization, recovery, and filling of inert gases such as high-purity nitrogen, argon, and helium
- Filling of industrial gas cylinders, gas packs, storage tanks, and tube trailers
- High-purity gas delivery for laboratories, research institutions, and the electronics manufacturing industry
- Process systems for petrochemicals, fine chemicals, and specialty gases
- Hydrogen energy, fuel cells, and other high-pressure gas testing equipment
- Hermetic compression of flammable, explosive, toxic, hazardous, and corrosive gases
- Recovery, recycling, and re-compression of rare and precious gases
Company Profile
Sollant has rich design and manufacturing experience, professional and powerful production and processing capabilities in forging, casting, heat treatment, welding, machining, assembly testing, etc., as well as complete technical testing equipment and means, which can conduct product testing according to the user's usage conditions. With its deformed design, manufacturing and installation, it has now reached an annual production capacity of 500 gas compressors of various types. Currently, the compressors produced by the company have exhaust pressures up to 50MPa. Its products cover national defense, aerospace, nuclear power, energy, Petrochemicals and other fields.
D-Type Diaphragm Gas Compressor FAQ
Q1: Why can diaphragm compressors guarantee high gas purity?
A: Throughout the compression process, the gas is completely sealed off from the external environment and the hydraulic system. Consequently, the purity of the gas remains unchanged from inlet to outlet; it is free from contamination by lubricating oil or solid impurities, ensuring zero secondary pollution.
Q2: Does the D-type diaphragm compressor require frequent maintenance?
A: No, maintenance requirements are low. It utilizes a pressure lubrication system that ensures critical moving parts receive ample, high-quality hydraulic oil lubrication, thereby minimizing wear. This results in minimal routine maintenance and a long service life.
Q3: Is customization available?
A: Yes. Configurations can be tailored to specific gas properties, pressure and flow requirements, and on-site operating conditions. Options include alarm functions, piping materials, and cooling methods, ensuring the equipment aligns perfectly with actual operational needs.
Q4: What safety protection features does the D-type diaphragm compressor offer?
A: Customizable features include a diaphragm alarm system and a low lubricating oil pressure alarm. In the event of a leak in the compressed medium or abnormal oil pressure, the system immediately triggers an alarm, enhancing the overall operational safety and reliability of the unit.
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