Liquid Dosingsystem LDS

High-precision dosing of liquids

The Liquid Dosing System (LDS) is a robust, modularly expandable dosing system. It enables accurate volumetric batch dosing of up to 36 low- to high-viscosity liquids with high flow rates in a fully enclosed transfer system all the way to the mixer line. Through individual temperature conditioning of each medium, the system ensures maximum reliability and throughput capacity without any risk of contamination – while maintaining excellent dosing and injection accuracy. The LDS replaces conventional liquid dosing equipment and eliminates the typical over‑dosing and associated cycle time losses, thereby reducing raw‑material costs and minimizing waste

Highly flexible liquid dosing system tailored to your application

In addition to the modular components for storage, temperature conditioning, and media supply, the hydraulically driven dosing cylinder (LDC) and the manufacturer-independent 6-nozzle mixer injection valve are the core components of the modular system. The dosing cylinder allows sequential injection of up to four liquids, while the injection valve provides a universal interface for injecting up to six different liquids into various mixer types. This facilitates flexible use or retrofitting of the LDS station to multiple mixer lines. For the operator, this results in the following advantages:

Closed, insulated system

Prevention of cross-contamination

Precise dosing of high-viscosity media

High flow rates independent of viscosity

Savings in energy consumption and raw material usage

Modular and scalable system design

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Perfect dosage. Drop by drop.

High dosing accuracy and speed

These features lead to lower raw‑material costs, as materials are utilized precisely and efficiently. At the same time, material losses are significantly reduced, increasing overall process profitability. In addition, this ensures higher batch availability and smoother production workflows.

Flexibility

Injection parameters can be configured variably — slow, fast, or sequential —depending on process requirements. Furthermore, multiple liquids can be processed within a single batch, enhancing the adaptability of the entire production process.

High throughput performance

High flow rates are achieved while maintaining consistent performance regardless of the viscosity of the media being processed.

Safety

A closed, insulated system prevents the formation of aerosols in the ambient air and simultaneously contributes to reduced energy consumption. In addition, the air purging function of the injection valve prevents cross-contamination.

Efficiency

A fast‑acting valve shut‑off minimizes material waste by preventing dripping, leakage, and over‑dosing

Ease of servicing

Simple installation and easy cleaning and maintenance mean low operational effort.

Engine

The drive is powered by a hydraulic power pack with an operating pressure of min 120 bar at 50l/min .

Operating conditions

The unit is designed to operate within an ambient temperature range of +5 °C to +40 °C, while processing media temperatures from +20 °C to +90 °C.

Closed system – maximum process accuracy!

The Liquid Dosing System (LDS) features media-specific subsystems and modules, such as dedicated components for liquid storage. Enclosed single and double container stations are available for pre-heating the IBCs, along with open container stations and intermediate tanks for liquids supplied from the oil storage area. The ring line in the container station to the dosing cylinder(s) is heat-traced and operates independently from the mixer line. The dosing cylinders themselves are designed according to product requirements and are available in various capacities (30/60/90 l). The hydraulic unit (Hydraulic Power Pack), which comes in three sizes, supports operation of up to eight dosing cylinders. The injection valve is universal and therefore suitable for any type of mixer. Up to six injection valves per mixer can be installed, enabling the introduction of up to six different liquids into the mixing batch.

Precise and reliable injection of liquids

Special highlights

< 30 batches/h

Dosing capacity

< 1 minute

Dosing time

< 30 seconds

Injection time

Direct dosing of process oils and plasticizers

The LDS is primarily used for storage, conditioning, volumetric dosing, transfer, and injection of liquid media. Typical media include oils, silanes, antioxidants, liquid rubbers, resins, solvents, and accelerators used in mixers in the rubber and tire industry.

Key facts at a glance

Precise injection and dosing

When a campaign change or recipe adjustment is required, the dosing process must be adapted quickly and reliably. This is exactly where our LDS liquid dosing system comes in. For many years, it has impressed with its high precision, short response times, and maximum process reliability, and is therefore successfully used in numerous plants in the tire and rubber industry. The LDS is an automatic, closed batch-based dosing system designed for the precise metering of process oils and plasticizers. It was specially developed for use in powder mixers in the rubber and plastics industry and enables clean, reproducible, and efficient integration into existing production processes.

Sizes

Dosing system for up to 36 liquids

Area of application

The system is suitable for silanes, resins, process oils such as TDAE, RAE, MES, naphthenic, rapeseed or recycled oils, solvents and highly viscous liquid rubbers in the manufacture of rubber compounds.

Pressure range

40 bar

Temperature range

Ambient +5 °C / + 40 °C, media +20 °C / +90 °C

Engine

Ambient +5 °C / + 40 °C, media +20 °C / +90 °C

Viscosities

Up to 7000 mPas

Materials

Media-specific

Advantages for the industry

Rubber & Tire

As recognized process experts, we know every step of the rubber and tire industry in detail. Our well-thought-out solutions provide you with measurable advantages across the entire value chain, including the recycling of end-of-life tires.

Go to rubber & tire industry

Need more details? Our contact person will be happy to assist you

Stefan Weißenrieder

ZSD Global Market Sales Rubber

stefan.weissenrieder@zeppelin.com +49 7541 202 1522

Related products

HPP hydraulic power pack

Available for one, four, or eight dosing cylinders. It is connected to each metering cylinder via a ring line and supplies it with hydraulic oil.

Liquid Container Station Closed/Open LCC/LCO

Designed for storage, dosing, and heating of liquids such as oils, silanes, HMMM, binders, and solvents. These are made available to downstream systems or components via a dedicated pump. As a subsystem of the LDS, the container station supplies either an intermediate station (via a branch line) or a dosing cylinder (via a ring line with liquid return to the container station). The container stations are available as an open version (LCO) or as an enclosed closed version (LCC).

Pressure retention unit PRU

Available in two sizes (DN25 and DN50) and two material options (carbon steel and stainless steel). The PRU is installed in the LDS ring line, enabling product conditioning in the following modules: oil recycling, LCC, LCO, or LIT. The key benefit of the PRU: The PRU maintains a high-pressure level in the ring line during a dosing cycle. This ensures the product is fed into the dosing cylinder at high pressure, preventing the cylinder from pulling a vacuum. As a result: This prevents cavitation and inaccuracies during dosing and reduces air bubbles in the product.

Liquid intermediate tank LIT

Can be installed in addition to an external oil storage system with ring line or used as an intermediate buffer tank at the mixer line. This setup requires only a low‑pressure ring line for feeding the intermediate tanks. The tanks have a volume of 320 liters and are set up in groups of two or three for non‑pressurized operation. Control is handled via the decentralized periphery. The tanks are equipped with level indicators, tank heating, and a media-specific pump, as well as an oil drip tray with overflow protection. A density meter can be added as an option for optimized heating control.

Oil recycling system

For collecting, filtering, and reconditioning used MES lubricating oils from several mixer lines (master and final batch). After processing the oil can be reused either as lubricant or as a raw material for rubber compound production.

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