DMH pumps. Grundfos dosing pumps. ALDOS series. Models: DME, DMS, DMX, DMH Accurate dosing - all the time

DMH hydraulic piston diaphragm dosing pumps from 0.15 l/h to 2 x 1500 l/h with a pressure range of 200 to 4 bar

General information

The Grundfos DMH series of pumps are very robust, wear-resistant pumps for applications where dosing reliability and high pressure capability are required, such as technological lines production. The DMH 28x series has been specially developed for high pressure systems from 50 to 200 bar. This series is very versatile: it includes a wide range of flow rates and many dosing head sizes, materials and accessories. Customers around the world have enjoyed years of trouble-free operation with DMH pumps.

Accurate dosing - all the time

DMH pumps have a very high dosing accuracy and ensure perfect reproducibility of results. For DMH25x dosing flow pulsation is< ± 1.5 % в пределах диапазона управления 10-100 %, а отклонение от линейности составляет ± 2 % от limit value scales. For DMH28x dosing flow pulsation is< ± 1.0 % в пределах диапазона управления 10-100 %, а отклонение от линейности составляет ± 1 % от предельного значения шкалы.

Uniform dosing with low pulsation

The DMH series combines advanced drive technology and drive kinematics to provide uniform dosing with low pulsation without pressure surges. This means less stress on all system components such as tubing and valves and ensures longer intervals between cycles. Maintenance for the entire system.

Engines to suit your needs

For applications with special requirements For motors, the extensive DMH series offers high quality motors in 50Hz, 60Hz, 100Hz (with VFD), as well as explosion-proof or ATEX certified motors as required.

Perfectly matched material for body and wetted parts

Models in the DMH series feature a rugged, epoxy-coated die-cast aluminum housing to suit all applications ( gray cast iron if required in API 675). Investment and operating costs on spare parts remain low for many years: Wide selection materials for dosing heads, valves and accessories allows you to accurately select the desired degree of chemical resistance. All wetted parts must be resistant to the chemicals used. The membrane is made entirely of PTFE.

Safe and trouble-free operation

Consistently installed safety valve and system active protection diaphragms (AMS) protect the pump and the entire system from overpressure in case of blockage of the pressure pipeline. In addition, the deaeration valve on the pump ensures high functional safety of the pump, the plant and the entire process. Thanks to their aluminum casing and piston diaphragm technology, DMH pumps have a very long term services and long intervals between maintenance cycles.

Approvals and certificates

For operation in potentially explosive areas, we offer explosion-proof or ATEX certified motors and pumps. For petrochemical applications, we offer special versions of our DMH series metering pumps that are API 675 certified.

Flexibility in pump configuration and application

Several different product configurations are available to meet different requirements: Flexible flow control concept: manual or automatic adjustment of the piston stroke using an electric servomotor. Pumps equipped with double diaphragm with failure indication or special dosing heads with electric heating. The versatility of these pumps is ensured by the use of a one-piece PTFE dosing diaphragm. Wetted parts are available in various materials, which satisfy almost all dosing needs. Choose the best configuration for your specific application.

Ready for harsh environments

Power plants

Dosing of various chemical substances at all stages in the power plant:

For boiler feed water, cooling water and process water treatment (raw water treatment, chemicals for ion exchangers, make-up water treatment, decontamination Wastewater).
Dosing of ammonia, hydrazine, phosphates in systems high pressure(feed water for the boiler).

Petrochemical, oil and gas, oil refining industry

Dosing of chemicals in oil and gas production areas (other than borehole, platforms):

Dosing of chemicals for the treatment of cleaning and process water
Dosing of paraffin as a lubricant in oil pipelines
Dosing of inhibitors and anti-corrosion agents to protect oil pipelines
Dosing of additives and catalysts
Gas odorization for safety in case of leaks

Treatment of technical and drinking water

Unfavorable conditions (hot climate, desert, open installations)
Higher flow and pressure values

Explosive areas

ATEX Directive (94/9/EC), Group II, Category 2 (Zone 1/21) and
ATEX Directive (94/9/EC) Group II, Category 3 (Zone 2/22)

Dosing of flammable liquids

Dosing of ethyl or methanol in wastewater treatment
Purification of kerosene and gasoline in machine-building and airport areas
Dosing of ethyl and methyl alcohol
Dosing of food grade alcohol for disinfection when packaging meat and bread

Specifications

Feed: up to 1500 l/h
Pressure: up to 200 bar
Fluid temperature: -10 °C to +90 °C

Manufacturer

Short description

DMH pumps are hydraulic piston diaphragm dosing pumps from 0.15 l/h to 2 x 1500 l/h with a pressure range of 200 to 4 bar.

The Grundfos DMH series of pumps are very robust, wear resistant pumps for applications where dosing reliability and high pressure capability are required, such as in production lines.

The DMH 28x series has been specially developed for high pressure systems from 50 to 200 bar. This series is very versatile: it includes a wide range of flow rates and many dosing head sizes, materials and accessories. Customers around the world have appreciated the reliability and reliability of DMH pumps for many years.

Areas of use

Heat generating equipment. Dosing of various chemicals at all stages in the power plant:

For boiler feed water treatment of cooling water and process water (raw water treatment, chemicals for ion exchangers, make-up water treatment, waste water disinfection).
Dosing of ammonia, hydrazine, phosphates in high pressure systems (boiler feed water).

Petrochemical, oil and gas, oil refining industry. Dosing of chemicals in oil and gas production areas (other than borehole, platforms):

Dosing of chemicals for the treatment of washing and process water.
Dosing of paraffin as a lubricant in oil pipelines.
Dosing of inhibitors and anti-corrosion agents to protect oil pipelines.
Dosing of additives and catalysts.
Gas odorization to ensure safety in case of leaks.

Treatment of technical and drinking water

Unfavorable conditions (hot climate, desert, open installations).
Higher flow and pressure values.

Explosive areas

ATEX Directive (94/9/EC), Group II, Category 2 (Zone 1/21).
ATEX Directive (94/9/EC), Group II, Category 3 (Zone 2/22).

Dosing of flammable liquids

Dosing of ethyl or methyl alcohol in wastewater treatment.
Purification of kerosene and gasoline in machine-building and airport areas.
Dosing of ethyl and methyl alcohol.
Dosing food grade alcohol for disinfection when packaging meat and bread.

Specifications

Feed: up to 1500 l/h.
Pressure: up to 200 bar.
Fluid temperature: -10°C to +90°C.

Key Features

Accurate dosing - all the time

DMH pumps have a very high dosing accuracy and ensure perfect reproducibility of results. For DMH25x dosing flow pulsation is< ±1.5 % в пределах диапазона управления 10-100 %, а отклонение от линейности составляет ± 2 % от предельного значения шкалы. Для DMH28x пульсация потока дозирования составляет < ± 1.0 % в пределах диапазона управления 10-100 %, а отклонение от линейности составляет ± 1 % от предельного значения шкалы.

Uniform dosing with low pulsation

The DMH series combines advanced drive technology and drive kinematics to provide uniform dosing with low pulsation without pressure surges. This means less stress on all system components such as pipes and valves and ensures longer maintenance intervals for the entire system.

Engines to suit your needs

For applications with special motor requirements, the extensive DMH series offers high quality motors in 50Hz, 60Hz, 100Hz (with VFD) as well as explosion-proof or ATEX certified motors as required.

Perfectly matched material for body and wetted parts

Models in the DMH series have a rugged epoxy coated cast aluminum body to suit all applications (grey cast iron if required in API 675). Investment and operating costs for spare parts remain low for many years: A wide range of materials for dosing heads, valves and accessories allows you to precisely match the desired degree of chemical resistance. All wetted parts must be resistant to the chemicals used. The membrane is made entirely of PTFE.

Safe and trouble-free operation

An in-line relief valve and Active Diaphragm Protection System (AMS) protect the pump and the entire system from overpressure in the event of a blockage in the pressure line. In addition, the deaeration valve on the pump ensures high functional safety of the pump, the plant and the entire process. Thanks to the aluminum casing and piston diaphragm technology, DMH pumps have a very long service life and long service intervals.

Permits and certificates

For operation in potentially explosive areas, Grundfos offers motors and pumps classified as explosion-proof or ATEX certified. For petrochemical applications, we offer special versions of our DMH series metering pumps that are API 675 certified.

Flexibility in pump configuration and application

Several different product configurations are available to meet different requirements: Flexible flow control concept: manual or automatic adjustment of the piston stroke using an electric servomotor. Double diaphragm pumps with failure indication or special electrically heated dosing heads. The versatility of these pumps is ensured by the use of a one-piece PTFE dosing diaphragm. Wetted parts are available in a variety of materials to suit virtually all dosing needs. Choose the best configuration for your specific application.

Advantages

High pressure dosing up to 200 bar.
Very accurate dosing.
One piece PTFE diaphragm as standard.

Order

The DME series pumps are diaphragm pumps with built-in ventilation valve, suction and delivery ball valves. The pumps are supplied with an electrical cable and plug.

The unique motor and microprocessor control ensure accurate dosing with low pulsations even when working with highly viscous and gassy liquids.

Electronically controlled stepper motor pump type DME provides optimal mode travel speed control. The duration of each suction stroke is constant, and the duration of each discharge stroke varies according to the set capacity value, as a result of which, under any operating conditions, the optimum speed of the diaphragm movement is maintained.
This has the following advantages:

The capacity control range for pumps (60−940 l/h) is 1:800
The capacity control range for pumps (0−48 l/h) is 1:1000.
Uniform and constant metered supply of the reagent ensures the optimal ratio of the mixture components at the injection point.
Pressure peaks are significantly reduced, which prevents the occurrence of mechanical stresses in the diaphragm, pipes, joints and other components and parts that are subject to wear during dosing and can cause leaks.
Suction and pressure pipes of great length have a lesser effect on dosing accuracy.
The process of dispensing very viscous and gas-containing liquids is facilitated. In any operating mode, the optimum dosing curve is obtained, as shown in the diagram below.

Powerful variable speed motors with a regulation depth of 1:1000/1:800 and various options management, including:
Pulse control;
Pulse control in the "batch" mode;
Management based on the built-in timer;
Analog control 0/4-20 mA;
Control by level sensor;
Fieldbus communication module (Genibus, Profibus).
guarantee that seven sizes of DME pumps cover the range from 0.002 to 940 liters per hour at pressures up to 18 bar. Switching power supply provides stable operation and accurate dosing regardless of power supply conditions (100-240 V, 50-60 Hz).

Grundfos DMS pumps

DMS series pumps are diaphragm pumps with built-in vent valve, suction and discharge ball valves. The pumps are supplied with an electrical cable and plug.

A synchronous motor with DMS electronic pump control offers almost the same benefits as DME pumps. The value of the speed of the suction and discharge strokes remains constant, while the stroke frequency changes according to the set capacity value.
The sinusoidal nature of the diaphragm movement provides the following advantages:
The pump always runs at full stroke, regardless of the set value.
performance while maintaining optimum dosing accuracy, initial priming and suction.
The capacity control range for pumps of each size is 1:100.
Reducing pressure peaks, which prevents the occurrence of mechanical stresses in the diaphragm, pipes, joints and other components and parts that are subject to wear during dosing and can cause leaks.
The process of dosing of very viscous and gas-containing liquids is facilitated. In any operating mode, an optimal dosing characteristic is ensured.

DMS pump range with synchronous motor and a regulation depth of 1:100 (includes four pump sizes with two control options) covers the range from 0.02 to 12 liters per hour.
− DMS-A version has pulse, analogue 4-20 mA and level sensor input;
− The DMS-B version does not have inputs for external signals.
− The DMS-D version does not have inputs for external signals and is not equipped with a control panel.

Grundfos DMH pumps

Grundfos DMH are piston diaphragm dosing pumps with capacities from 2.2 to 2x1150 l/h.

The Grundfos DMH range is a range of rugged, reliable pumps used when dosing with a sufficiently large operating range at high pressure is required. The DMH pump provides accuracy within ±1% of the calculated flow rate, so when choosing pumps to perform complex tasks and automatic integration into the process, DMH pumps are preferred. Worth paying Special attention durability of these pumps: our customers around the world report that DMH pumps have been running for years without failure.

Pumps are available in a wide variety of configurations to suit virtually any application. For example, you can choose either an electric or a pneumatic servomotor (option: with frequency converter). You can choose electrically heated dosing heads or equip pumps with double diaphragms with a diaphragm rupture indicator. If you are in doubt about the correctness of your choice, contact
contact our consultants and they will help you choose the right pump configuration.

Grundfos DMX pumps

Grundfos DMX - Diaphragm dosing pumps from 4 to 2x765 l/h.

Grundfos DMX is a range of high quality diaphragm pumps for a wide range of applications such as water treatment, wastewater treatment (sludge/contaminant removal) and the pulp and paper industry.

The pumps of this series are characterized by versatility, which is expressed in a wide operating range, the ability to choose the size of the dosing head, material and accessories.

If you find it difficult to determine the required DMX configuration, please contact us - we will find the right solution for you.

The benefits offered by the Grundfos DMX pump range have been highly appreciated all over the world. DMX pumps are an example of how versatile dosing can be combined with minimal maintenance thanks to the tight diaphragm design of the pumps.
and high quality motors. The redesigned Grundfos DMX pumps, now included in the Grundfos Dosing pump range, are still reliable.

DMH hydraulic piston diaphragm dosing pumps from 0.15 l/h to 2 x 1500 l/h with a pressure range of 200 to 4 bar

General information

The Grundfos DMH series of pumps are very robust, wear resistant pumps for applications where dosing reliability and high pressure capability are required, such as in production lines. The DMH 28x series has been specially developed for high pressure systems from 50 to 200 bar. This series is very versatile: it includes a wide range of flow rates and many dosing head sizes, materials and accessories. Customers around the world have enjoyed years of trouble-free operation with DMH pumps.

Accurate dosing - all the time

DMH pumps have a very high dosing accuracy and ensure perfect reproducibility of results. For DMH25x dosing flow pulsation is< ± 1.5 % в пределах диапазона управления 10-100 %, а отклонение от линейности составляет ± 2 % от предельного значения шкалы. Для DMH28x пульсация потока дозирования составляет < ± 1.0 % в пределах диапазона управления 10-100 %, а отклонение от линейности составляет ± 1 % от предельного значения шкалы.

Uniform dosing with low pulsation

The DMH series combines advanced drive technology and drive kinematics to provide uniform dosing with low pulsation without pressure surges. This means less stress on all system components such as pipes and valves and ensures longer maintenance intervals for the entire system.

Engines to suit your needs

For applications with special motor requirements, the extensive DMH series offers high quality motors in 50Hz, 60Hz, 100Hz (with VFD) as well as explosion-proof or ATEX certified motors as required.

Perfectly matched material for body and wetted parts

Safe and trouble-free operation

Approvals and certificates

Flexibility in pump configuration and application

Several different product configurations are available to meet different requirements: Flexible flow control concept: manual or automatic adjustment of the piston stroke using an electric servomotor. Double diaphragm pumps with failure indication or special electrically heated dosing heads. The versatility of these pumps is ensured by the use of a one-piece PTFE dosing diaphragm. Wetted parts are available in a variety of materials to suit virtually all dosing needs. Choose the best configuration for your specific application.

Ready for harsh environments

Power plants

Dosing of various chemicals at all stages in the power plant:

For boiler feed water treatment of cooling water and process water (raw water treatment, chemicals for ion exchangers, make-up water treatment, waste water disinfection).
Dosing of ammonia, hydrazine, phosphates in high pressure systems (boiler feed water).

Petrochemical, oil and gas, oil refining industry

Dosing of chemicals in oil and gas production areas (other than borehole, platforms):

Dosing of chemicals for the treatment of cleaning and process water
Dosing of paraffin as a lubricant in oil pipelines
Dosing of inhibitors and anti-corrosion agents to protect oil pipelines
Dosing of additives and catalysts
Gas odorization for safety in case of leaks

Treatment of technical and drinking water

Unfavorable conditions (hot climate, desert, open installations)
Higher flow and pressure values

Explosive areas

ATEX Directive (94/9/EC), Group II, Category 2 (Zone 1/21) and
ATEX Directive (94/9/EC) Group II, Category 3 (Zone 2/22)

Dosing of flammable liquids

Dosing of ethyl or methanol in wastewater treatment
Purification of kerosene and gasoline in machine-building and airport areas
Dosing of ethyl and methyl alcohol
Dosing of food grade alcohol for disinfection when packaging meat and bread

Specifications

Feed: up to 1500 l/h
Pressure: up to 200 bar
Fluid temperature: -10°C to +90°C