SEKO Kompact DPT200NHH0000 | Digital Proportional Chemical Dosing Pump

Fixed chemical dosing can lead to underfeed during peak flow and unnecessary chemical consumption when process demand falls. The SEKO Kompact DPT200NHH0000 Digital Proportional Dosing Pump solves this by allowing chemical feed to follow an external analogue 0/4–20 mA signal or digital pulse signal from equipment such as a water meter or process controller.

The hydraulic 200 version provides 5 L/h at 8 bar or 3 L/h at 10 bar, and dosing can be adjusted manually or automatically from 0 to 100%. Its digital interface adds weekly timer programming, ppm dosing, batch dosing, statistics, password protection and remote ON/OFF capability. The NHH construction combines PVDF, PTFE and FKM-B wetted components, making it particularly useful for proportional dosing of acids, ferric chloride and sodium bisulfite. SEKO confirms DPT supports both analogue and digital proportional control.

Proportional Dosing Pump Selection Guide

Choose DPT200NHH0000 when the chemical dose must vary automatically with water flow, PLC output or another external process signal. It is more suitable than AML, where changing process demand makes a fixed manual percentage inefficient.

The FKM-B configuration is a strong choice for hydrochloric acid, phosphoric acid, ferric chloride and sodium bisulfite. Antiscalant dosing is also a common proportional application, but because antiscalants are proprietary mixtures, check compatibility against the product SDS. Sodium hypochlorite requires concentration and temperature verification before use with the fluoroelastomer seal configuration.

Market Relevance

DPT200NHH0000 suits Pakistan’s RO plants, municipal water systems, cooling towers, industrial treatment skids, and process lines where chemical demand changes with water flow. Typical duties include flow-paced antiscalant, acid, coagulant and dechlorination dosing. Kamadi Pakistan offers SEKO DPT pumps for buyers requiring automated chemical-feed control rather than fixed manual dosing.

Key Features

• Proportional control from 0/4–20 mA or digital pulse signals
  
• Manual or automatic 0–100% dosing adjustment
  
• Weekly timer, ppm and batch-dosing functions
  
• Digital 2 × 8-character backlit display
  
• Password, statistics, low-level alarm and remote ON/OFF functions
  

Technical Specifications

• Model: DPT200NHH0000
  
• Pump Type: Digital proportional solenoid dosing pump
  
• Flow / Pressure: 5 L/h at 8 bar; 3 L/h at 10 bar
  
• Maximum Frequency: 160 strokes/min
  
• Control Inputs: 0/4–20 mA and digital pulse
  
• Power Supply: 100–240 VAC, 50/60 Hz
  
• Liquid End: PVDF
  
• Diaphragm: PTFE
  
• Seals: FKM-B
  
• Installation Kit: PVDF
  

Applications

• Flow-paced RO antiscalant dosing
  
• Acid dosing proportional to process demand
  
• Ferric chloride coagulant dosing
  
• Sodium bisulfite dechlorination
  
• Automated industrial chemical injection
  

Professional Tip: For flow-proportional dosing, calculate the required chemical dose per cubic metre first and then configure the water-meter pulse or 4–20 mA scaling accordingly; correct signal scaling is as important as selecting the pump capacity.