The dual-line lubrication system is a type of centralized lubrication system that uses two main lines to distribute lubricant to multiple points in a machine or system. The system features a central pump that delivers lubricant to the two main lines, one for the primary system and one for the secondary system. Each line has a series of metering valve, such as dual line block, that delivery precise amounts of lubricant to designated lubrication points.
If you go to some heavy-duty workshops, like mining, cement plants, metal steel factory etc, you will see these bigger stationary machinery work very well. The system is benifit for the bearings,gears or chains.

  • Die erforderlichen massiven Schmierpunkte könnten bis zu 2000 Punkte, 120 Mio. betragen
  • Einfaches Erweitern und Reduzieren der Punkte
  • geeignet für die nasse, schmutzige und feuchte Umgebung
bsb Pumpstation


Die Doppellinie Schmiersystem wird für große stationäre Anlagen verwendet. Sie werden die beiden wichtigsten sehen Leitungen im System, wobei die beiden Leitungen mit dem Dosiergerät arbeiten, mit dem das kostbare Fett gefördert wird to the large vol. required. In most time,we could connect the downstream metering units to increase the points to receive the small lubricant vol.

Das Hauptsystem wird mit einem Satz bs-b kombiniert Fettpumpe, Wegeventil, Dosierverteiler, Schaltgerät und Kontrollmonitor.

Das Schmiermittel wird gepumpt in die beiden Leitungen und dann das Richtungssteuerventil wird geleitet, um in die Dosiereinheiten zu pumpen. Es teilt sich in zwei Halbzykluszeiten auf.

Der Vorteil des Dual-Line-Systems besteht darin, dass, wenn einer der Punkte ein Problem hat, die Ruhepunkte nicht betroffen sind.

Geistige Stahlindustrie


Here are some benefits of dual-line Schmiersysteme:
1. Consistent Lubrication:Make sure the machinery operates smoothly and efficiently.
2. Cost-Effective: The dual-line system is a cost-effective way to deliver lubrication to multiple points saving on labor, maintenance, and lubricant costs.
3. Reliable: Dual-line Schmiersysteme are known for their reliability and longevity.
4. Minimal Downtime:Dual-line lubrication systems can avoid costly shutdowns and maintenance downtime.
5. Increased Equipment Life: Dual-line lubrication Systeme are designed to help prolong the life of machinery by providing consistent lubrication.

  • Reduzieren Sie den Wartungsaufwand
  • Reduzieren Sie die Ersatzteile
  • Schützen Sie den Bediener
  • Erhöhen Sie das Zuverlässige
bs-b Pumpe
As a central station pump, the BS-B pump is ideal for applications that require long main line runs and a large number of friction points to be reliably serviced. The pump is primarily used with distributors type ZV-B downstream in dual-line centralized systems, but can also be used for filling or fetten.
BM-B Zweileitungs-Fettpumpe
The BM-B pump is typically delivered as a fully-equipped package, powered by an Elektromotor. It utilizes a valveless positive displacement mechanism that employs multiple pistons which are activated in a controlled sequence using an eccentric cam and lubricant reservoir. This motion produces dependable suction and discharge capabilities, resulting in a robust Schmiersystem. Additionally, the BM-B incorporates a pressure relief valve that can be adjusted to manage operating pressure for centralized lubricating systems. Ein Bereich von elektrische Getriebemotoren are also offered to suit different requirements.
Handpumpe HJ2
we have developed dependable high-pressure pumping units to supply lubricant at a dependable high pressure for the Dualine measuring valves to operate successfully and to perform efficiently, . A manually-operated central pumping unit is used for bearings that need lubricant once or twice per shift. By using a hand lever through a rack-and-gear segment, these units operate a double-acting piston pump.
vsg dosiereinheit
Constructed from high strength carbon steel, the VSG-KR type Zweileitungsschmierung distributor is equipped with upper and lower ports; the piston moves forward and backward, which causes the grease to be discharged once from either port at a time. It features a two-to-one displacement structure on the upper and lower supplying ports respectively.If an odd amount of grease needs to be changed, adjusting the guide position will suffice. You can conveniently check operation position of the distributor from its indicator lever, while adjusting bolts allow you to easily adjust grease feeding volume within specification range. Suitable for nominal pressure 400bar dual-line centralized grease lubrication systems.
Entladung: 0-2.2 ml
vsl Dosiereinheit
This VSL-KR distributor is made of high strength carbon steel and comes equipped with Zweileitungsschmierung ports, both upper and lower. When the piston moves forward or backward, the grease is discharged to the oil port at a time. It has a two to one displacement structure in the supplying ports of the upper and lower, so if an uneven number of greases need altering, it can be voluntarily adjusted with ease. Additionally, its indicator lever allows for checking of operation positions quickly while its adjustable bolts allow for simple customization of grease feeding volumes within the specified range. This series is suitable for nominal pressure 400 bar two-wire centralized greasing systems; head turning under pressure directly controls the action of oil pressure piston which ensures rationed supply of grease to each lubrication Punkt.
Entladung: 0-5 ml
zv-b Dosiereinheit
The Z-VB lubrication distributor is ideal for systems with a maximum nominal pressure of 400 bar, that use grease or oil as the medium. It supplies air to different lubrication spots independently with two delivery lines and can adjust the feeding volume as per varying requirements. There are three metering types available: one with a metering screw, one with a motion indicator to adjust from zero to its adjustment range and detect the distributor's normal operation, and one equipped with a motion indicator and limit switch adjustment.
1.5ml / Strich
dm Dosiereinheit
The advatage of the DD and DM blocks is there isn't any spring and Rückschlagventil inside.You could extend your system based on your original system.You could see the indicator pin at every point.You could adjust the discharge on each outlet.The structure is very simple compare the other blocks.The maximum outlets could reach 12 points.The maximum working temperature could reach 160 degree.
DR45 Umkehrventil
DR4-5 valve is used to control the lubricant flow through the either of the dual-line system.In each cycle,the valve is actively by the pressure sensing mechnical switch.The valve could work at from 50kgs to 400kgs.The DR4 valve could control the return system and non-return system.You could use this valve for the opening gear spary system to control the large system.
The SA direction valve is used in the hydraulic system.This valve is 4/2 way valve and driven by a DC24V motor and suitable for 40Mpa pressure system.

Dual Line Schmiersysteme Anwendung (3)

  • Zementfabrik

    The Cement Factory likely chose to use a dual-line Schmiersystem.Cement production involves large, heavy machinery that operates continuously under demanding conditions. This type of equipment requires regular lubrication to ensure that components such as bearings and gears are properly protected and can operate effectively.A dual-line lubrication System is designed to provide a consistent flow of lubrication to critical components, which helps to reduce wear and tear and extend the life of equipment. By providing a steady supply of lubrication, the system can help to prevent overheating and other issues that can lead to equipment failure or even safety hazards.In addition to improving reliability and safety, a dual-line system can also help to reduce maintenance costs over time. By ensuring that equipment is properly lubricated at all times, the system can help to minimize the need for costly repairs and downtime for maintenance.

  • Bergbauanlage

    A dual-line Schmiersystem in a mining plant has several advantages. It can increase reliability and productivity by ensuring critical components remain constantly lubricated. This reduces maintenance costs by extending component life and minimizing the need for repairs or replacements. Dual-line systems enhance safety by preventing accidents through proper lubrication of mining machinery. Automatic delivery of lubricant ensures Ausrüstung remains properly lubricated, even during periods of heavy use or extended operating hours. The system optimizes equipment performance by reducing downtime and improving efficiency, leading to more efficient mining operations.

  • Kraftwerke

    Die Doppellinie system helps to ensure proper lubrication of critical components in high-temperature environments, reducing the risk of equipment failures that could lead to accidents or unplanned downtime. Power plants have large-scale equipment that requires proper lubrication to operate effectively, and the dual-line system provides a predictable and continuous flow of lubricant to these components. Safety is always a top priority in power plants, and the dual-line system helps to minimize risks by preventing unplanned maintenance or equipment failures. Finally, power plants operate 24/7 and require high levels of efficiency, and the dual-line system helps to optimize equipment performance, reduce costs, and improve productivity levels.

  • elektrisches Zweileitungs-Schmiersystem

    This system uses motor-driven dual-line valves to provide a consistent flow of lubricant to equipment. The central station includes a pump, cycle switch, and reversing valve, while the controller monitors and controls the system’s operation to ensure that each component receives the proper amount of lubrication. The system improves equipment reliability, reduces maintenance costs, and enhances safety and efficiency in industrial applications.

  • manuelles Zweileitungs-Schmiersystem

    The manual dual-line lubrication system is a centralized system that relies on manual operation to supply lubrication to equipment. It involves dual-line valves, lubricators with built-in reversing valves, and does not use a controller. This system is suitable for equipment that is not easily accessible or needs less frequent lubrication. However, over-lubrication or under-lubrication can occur if not enough or too much lubricant is dispensed. Overall, the manual dual-line lubrication system is an effective solution for situations where multiple components need lubrication, but continuous lubrication is not necessary. It can prolong the life of critical components by ensuring proper lubrication is delivered at regular intervals while also preventing lubricant wastage.

  • air operated spray system

    Ein weiterer beliebter type of Dualine system includes an air-operated barrel pump that delivers lubricant to the Dualine valves in the system. To control and monitor the system’s functionality, a reversing valve with a pressure gauge is used, and a controller is also employed. The DD valves, DM valves, or DDM/SDM modular valves can be used as part of this type of system. Additionally, an air control panel is necessary to regulate the air supply to the barrel pump and to the reversing valve. Overall, the air-operated Dualine system is a reliable and efficient solution for providing lubrication to machinery and equipment, especially in industrial settings where lubrication demands are high.

Dual Line Schmiersysteme Benifikation

Verschleiß reduzieren
Reduzieren Sie den Verschleiß
Das in der Hochleistungsausrüstung befestigte Doppelleitungssystem stellt sicher, dass die Ausrüstung gut funktioniert
Reduzieren Sie den Wartungsaufwand
Reduzieren Sie den Wartungsaufwand
Bereiten Sie die Ersatzteile nicht vor und der Techniker wird die schmutzige Maschine nicht reparieren.
Leute beschützen
Bediener schützen
Techniker werden der rauen Umgebung kein Fett hinzufügen
Effizienz erhöhen
Umsatz steigern
Das Dual-Line-System sorgt dafür, dass das Gerät rund um die Uhr funktioniert.
Schmierung ist kein großes Problem

Dualin lubrication systems have become a popular choice in industries where continuous duty operation is necessary. These systems can be found in a wide range of applications, from heavy-duty manufacturing equipment to power generation machinery, providing many benefits to equipment users. The system consists of various components that work together to provide automatic lubrication. Components used in designing a Dualine lubrication system may include dual-line valves, lubricators, reversing valves, central stations, controllers, and spray systems. With their efficient design and effective lubrication delivery, Dualine lubrication systems are an excellent choice for companies seeking to ensure their machinery operates smoothly and reliably.


Dualine valves in the system can receive lubrication from a variety of lubricators such as manual, electric, and pneumatic, which are responsible for storing and pumping lubricant.

Change Valve

The function of the Dualine valves in the system is to regulate and control the distribution of lubricant by altering the flow and direction of pressure, leading to the cycling of divider valves. The valves operate by toggling between two lines of lubricant and ensuring that each line receives an equal amount of lubrication. When activated, the valve diverts the pressure to one line and then the other, causing the divider valve to cycle and deliver lubricant to the equipment. This precise regulation of lubrication delivery by the Dualine valves ensures optimal performance and longevity of the machinery while minimizing the risks of damage due to insufficient or excessive lubrication.


The dual line metering valves has different kinds of the typs,VSG,VSL,DM&DDM,ZV-B,and SSPQ type.These valves are equipped in the system to delivery the grease or oil.


The dual line lubrication system controller is usually unstandards.We usually design the system based on the requirement.With the touch screen and plc controlled,the Schmiersystem could adjustable at field via change the modules by the operator.The system could add the digital pressure switch to witness the complete system.

The dual-line systems are a tippe of lubrication system that is designed to lubricate large systems with dispersed lubrication points. These systems use two main lines that are supplied alternately with lubricant from a high-pressure pump via a change-over valve at up to 400 bar (5,800 psi). Branch lines, along the main lines, are connected with dual-line metering devices to supply a large volume of lubricant to the lubrication points.
One of the benefits of these systems is that they are flexible and easy to design. They can be extended or reduced easily by installing additional metering devices or by removing them, without requiring a redesign of the system. Dual-line metering devices can also be combined with downstream progressive metering devices to increase the total number of lubrication points receiving small lubricant amounts.
The dual-line systems can dispense a precise, metered amount of lubricant to up to 2,000 lubrication points over long distances up to 120 m (both side) and more, depending on Häuser values. Even if one pair of outlets becomes blocked inside one metering device, the dual-line systems provide sufficient lubrication for the rest of the system’s lubrication points.
The function principle of the dual-line systems consists of two half-cycles. In the first half-cycle, the lubricant is pumped into the main line (A) and the main line (B) is connected to the relief line. The lubricant, which is conducted by the change-over valve, is supplied to the metering devices. The pistons of the metering devices are moved into their adjusted end positions, thus dispensing an exact, metered quantity of grease. Once all metering devices have dispensed their lubricant to the consumption point, the system is hydraulically closed, which causes the pressure in main line (A) to rise until the preset pressure at the end-of-line pressure switch (mounted in the main lines prior to the last metering device) is reached. This pressure switch then signals an electric pulse to the control unit, which turns the pump off and signals the change-over valve to relieve main line (A), and the pause time starts. At this stage, half of the lubrication points in the system have been lubricated. In the second half-cycle, main line (B) is pressurized and the cycle continues as before.

The dual-line lubrication systems are designed to be versatile and work with different types of lubricants. They can be used with oil, semi-fluid grease and hard grease up to NLGI grade 2, while harder greases of NLGI grade 3 can only be used after consultation and determination with dual line system.
These lubrication systems are well-suited for a variety of applications in heavy industry, metalworking plants, pulp and paper production, mining, mineral processing, power plants, cement factories, steel works, and more. They are particularly effective in harsh operating conditions involving potentially high lubrication-point back pressure, dirty, wet or humid environments, and low temperatures.
With their ability to deliver precise, metered amounts of lubricant to large numbers of lubrication points over long distances, the dual-line lubrication systems are ideal for use in large-scale industrial operations that require reliable, efficient lubrication systems.

1. Efficient and accurate lubrication: Dual-line systems can deliver precise, metered amounts of lubricant to a large number of lubrication points over long distances, ensuring that machinery is properly lubricated and functioning optimally.
2. Flexibility and easy design: Dual-line systems are simple to design and can be extended or reduced easily by installing additional metering devices or by removing them, without requiring a redesign of the system.
3. Durability: These systems are highly resistant to harsh operating conditions, including high lubrication-point back pressure, dirty, wet or humid environments, and low temperatures.
4. Reliable operation: Dual-line systems operate effectively in heavy industry, metal working plants, pulp and paper production, mining, mineral processing, power plants, cement factories, steel works and other industries.
5. Cost-effective: With their ability to lubricate many points with a single system, dual-line systems can be a cost-effective solution for industrial operations.
6. Minimal maintenance: Dual-line systems require minimal maintenance compared to other Schmierung Systemen.
7. Enhanced safety: Proper lubrication through the use of dual-line systems can help reduce the risk of equipment failures and accidents, thus enhancing workplace safety.

Dual line lurbication line in Isohitech Lubrication workshop


Isohitech lubrication is focused on the development of lubrication technology. Quality is crucial for heavy-duty equipment, for us, we have built a trail line in our workshop, we will test every Dosiereinheit in our workshop and guarantee 12 Month free spare parts service.

Isohitech könnte auch Produkte anderer berühmter Marken auf der Welt anbieten und einen Umbauservice für diese Marken anbieten.

What is dual line lubrication system?

A dual-line lubrication system is a type of zentralisierte lubrication system that delivers precise, metered amounts of lubricant to a large number of lubrication points over long distances using two main lines that are supplied alternately with lubricant from a high-pressure pump via a change-over valve at up to 400 bar (5800 psi). Branch lines, along the main lines, are connected with dual-line metering devices to supply a large volume of lubricant to the lubrication points. These systems are designed for large systems with dispersed lubrication points that require varying lubrication quantities and can be used with oil, semi-fluid grease and hard grease up to NLGI grade 2. Dual-line lubrication systems are versatile, durable, and reliable, making them well-suited for a variety of industrial applications in harsh operating conditions.

What is the main purpose of DM valve in dual line grease lubrication system?

The main purpose of a DM (Dual Line Metering) valve in a dual-line grease lubrication system is to accurately meter and distribute grease to lubrication points. Each DM valve has two outlets, and when one outlet is supplied with grease, the other outlet is relieved. The DM valve distributes the precise amount of grease required for each lubrication point in the system by adjusting the size of its internal piston, which regulates the volume of grease that is dispensed through the outlet. By providing precise and accurate metering of grease to each lubrication point, the DM valve ensures that the equipment runs smoothly and efficiently, while reducing the potential for equipment damage or failure due to incorrect lubrication.

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