DDI 150/4-AR-SS/T/SS-31B4B4F

  • Digital Dosing Pump
  • 0.19-150 lph, 4 bar
  • St Steel/PTFE/St Steel
  • 110-230/1/50-60
  • 800:1 turndown

The DDI series is firmly established on the dosing pump market with its combination of innovative drive technology and integrated microelectronics. Users appreciate how they can simply enter the required dosing rate in litres per hour and let the DDI handle the rest.

Flow monitor checks for malfunctions (optional)

The unique flow monitor detects any dosing errors on both the suction and pressure sides and immediately emits an error message if anything is wrong. It can also check for excess pressure: Just enter the maximum counter pressure allowed (in bar) and leave everything to the DDI. If the pressure is exceeded, the pump stops.

Double diaphragm for optimum process reliability

Some processes must never be interrupted – not even in the event of a diaphragm rupture. The DDI is equipped with a double diaphragm system. If the diaphragm fails, the DDI will continue dosing thanks to the protective diaphragm.

Diaphragm leak detection (optional)

If the pump is supplied with diaphragm leak detection, a differential pressure sensor will send an error signal as notification to replace the diaphragm.

Turndown ratio of 1:800

The DDI 222 has a turndown ratio ten times better than that of conventional equipment. This allows us to create a complete pump series with just one motor, one gearing system, and two pump head sizes. You get the precision you want every time – and need only a minimum of spare parts and storage capacity.

Compact design

DDI pumps are smaller and quieter than conventional pumps in their class, making them easy to install anywhere. Order your DDI with the control and display interface on the side or front as you wish.

Full stroke length every time

The DDI series use a full stroke length every time – a feature unique to Grundfos Alldos dosing pumps. Each stroke is carefully timed to bring you even concentrations in the system and optimum priming throughout the entire operating range.

Brushless DC motor

The drive solution used in the DDI series ensures very smooth, continuous dosing even as it keeps energy consumption at a record low.

Anti-cavitation function

The “slow mode” settings systematically reduce the suction stroke so that difficult, viscous media are dosed with smooth precision. When set at 60% of the maximum dosing rate, the DDI can dose media with a viscosity of up to 1,000 [mPa s] at 40%, it will handle extremely viscous media up to 2600 [mPa s]. You no longer need external dilution or treatment systems, but can dose chemicals directly and with no waste.

Fieldbus communication available

The DDI is also available with a PROFIBUS DP interface.

Switch-mode power supply

DDI pumps can be used worldwide within the range of 100-240 VAC, 50/60 Hz.

Manual control

In manual control mode, set the flow rate in the display.

Pulse control

For each pulse received at the contact input of the pump (for example from a water meter with reed contact output), the pump doses the set quantity. The memory can store a maximum of 65,000 pulses for later processing.

Analog control

The dosed quantity is proportional to the current input signal of 0-20 mA or 4-20 mA.

Batch mode

In batch mode, a defined batch quantity is dosed with a defined flow. The dosing of a batch can be triggered manually and by pulse.

Timer batch

The set batch quantity is dosed with a preset interval.

Slow mode

In slow mode, the pumps slow down the suction stroke. This reduces cavitation when dosing viscous media. Slow mode can be activated in any operating mode.

Additional information

Weight1 kg
Dynamic Visibility - Custom Condition: syntax error, unexpected '}', expecting ';'

Give WES A Call

General Enquiries

We use cookies to ensure that we give you the best experience on our website. By clicking Accept, you consent to store on your device all technologies described in our Privacy Policy.

Les Bunce

Hire Business Manager

Les Bunce is Hire Business Manager. He leads the WES Hire Business responsible for managing the supply of our Temporary Chemical Dosing hire fleet on both a planned and emergency basis. Les has over 25 years’ experience in the hire industry and fully understands our customers’ hire requirements.

Patrick Fisher

Projects Director

Patrick Fisher is Projects Director. He leads the business stream responsible for project management, design, engineering, manufacture and delivery of “Capital project” chemical dosing systems. A degree qualified engineer with over 10 years’ experience working in fluid delivery solutions to the water, general industrial, petrochemical, and food & beverage industries.

Bob Cook

Senior Proposals Manager

Bob Cook is Senior Proposals Manager. After completing a traditional engineering apprenticeship at the Royal Aircraft Establishment, Bob was one of the original partners who started the business in 1986. Bob now applies his considerable experience to developing proposals & solutions to meet customer requirements, as well as providing technical support & passing on knowledge & expertise to colleagues across the wider WES business.

Ian Price

Dosing Products Business Manager

Ian Price is WES Dosing Products Business Manager, leading the business stream responsible for delivering a wide range of standardised chemical dosing packages, ad-hoc dosing needs and ‘off the shelf’ dosing products & solutions. A mechanical engineer with over 20 years’ experience in fluid handling solutions into the water, petrochemical, pharmaceutical and food & beverage markets.

Jamie Cole

Operations Director

Jamie Cole is Operations Director. Jamie joined the business in 2018 bringing career long experience in a variety of operational roles – including service delivery to the property and utilities sectors. Jamie is responsible for the management of all operational activities of the business including the repair, maintenance & refurbishment business stream, and our site installation and workshop manufacturing teams. Jamie also forms part of the senior management team of WES.

Graham Ward

Business Development Director

Graham Ward is Sales and Marketing Director. His extensive experience includes a number of senior roles working for various SMEs and large organisations in the water, power generation, petrochemical, marine and food & beverage industries. As a qualified marine engineer, Graham has established his career in Sales and Business Development and is responsible for the business development, marketing and sales of systems, products and services across WES.

Carl Millington

Non-Exec Director

Carl joined WES as Non-Exec chairman following an appointment via the Business Growth Service to assist the business with growth strategy. A highly experienced Business Mentor, Coach, Managing Director & Non-Exec Chairman, having led product, manufacturing, contracting and service provider businesses for nearly 30 years. A strong track record of market, sales and profit growth within a diverse range of sectors.

Core competencies include business growth strategies, board & business leadership, strategic planning, sales & marketing management, P&L & balance sheet management, acquisitions, divestments, outsourcing, TUPE transfer, mentoring & coaching.

Kevin Wheeler

Managing Director

Kevin Wheeler is Managing Director. Kevin trained as an Engineer at the Royal Aircraft Establishment and joined the business in 1989. Kevin now leads the Board of Directors setting strategy and defining priorities to meet the business objectives & growth aspirations whilst adding experience to technical issues where required.