SEKO Spring series piston dosing pump
SEKO Spring series piston dosing pumps
The Spring series is SEKO's piston dosing pump range, covering continuous dosing from low flow at high pressure to high flow at low pressure. The reciprocating piston design with hard ceramic or stainless steel valve balls suits long, uninterrupted operation where dosing accuracy matters.
Key features
- Flow range: 1.5–304 l/h
- Maximum pressure: 4–20 bar
- Wetted materials: PVC / PVDF / SS316L head, PTFE diaphragm, EPDM or FPM seals, ceramic or stainless steel valve balls
- Variable-frequency and explosion-proof motors available, manually adjustable stroke length
Typical applications: dosing in water and wastewater treatment, chemical process metering, food & beverage additive dosing.
Case Studies
Municipal Wastewater Treatment · SPRING — Application Case
Customer Profile
The typical setting in Municipal Wastewater Treatment is the inlet, biological and outlet stages of a municipal plant. The measuring point is SPRING; the focus is high-pressure plunger dosing with the SPRING range.
Key Difficulties
Conditions are high solids and corrosive fractions, with large diurnal flow swings and, on top of that, effluent parameters drift and probes foul with sludge and biofilm, which a standard configuration cannot handle for long. The design therefore starts with selected by pressure class, flow range and seal type.
Implementation
The scope ran through the plunger pump series: plunger-pump solution for high-pressure, low-flow duty. Technically it hinges on selected by pressure class, flow range and seal type, and on these requirements: stable compliance with Grade 1A discharge limits and online data reporting.
Customer Benefit
In practice this means well suited to high-pressure RO and boiler chemical dosing, which cut the workload on the site maintenance team.
Food & Beverage · SPRING — Application Case
Project Background
The project covers dosing, pasteurising, filling and CIP stages. The work centres on SPRING and the core task is high-pressure plunger dosing with the SPRING range.
Operating Challenges
The medium and duty are characterised by syrups, dairy and beverages that scale easily, under strict hygienic requirements, and frequent cleaning demands instruments that withstand hot CIP/SIP caustic cycles. So SPRING cannot be specified generically — it calls for selected by pressure class, flow range and seal type.
Solution
The Ainstru engineering team worked through the plunger pump series: plunger-pump solution for high-pressure, low-flow duty. The configuration involves selected by pressure class, flow range and seal type, with these requirements in view: food-safety and hygienic design per 3-A / EHEDG.
Results
Since start-up the system has run steadily; the practical result is well suited to high-pressure RO and boiler chemical dosing.
Chemical & Pharmaceutical · SPRING — Application Case
Project Overview
The site is reactors, metering vessels and finished-product tanks. The customer wanted SPRING properly configured on the existing plant, with the aim of high-pressure plunger dosing with the SPRING range.
Technical Challenges
What actually causes trouble is highly corrosive media with solvents and crystallisation, partly in explosive atmospheres, and corrosion plus Ex protection shortens instrument life and makes downtime costly. All of this means the SPRING configuration has to involve selected by pressure class, flow range and seal type.
Configuration
Supply and installation were organised through the plunger pump series: plunger-pump solution for high-pressure, low-flow duty. On site this meant selected by pressure class, flow range and seal type, checked line by line against: Ex certification and GMP traceability of records.
Performance
After commissioning the outcome is well suited to high-pressure RO and boiler chemical dosing, and the readings are now used for process tuning.
Power & Energy · SPRING — Application Case
Site Conditions
This is a Power & Energy customer whose plant is at boiler feedwater, turbine condensate and FGD/DeNOx systems. The main task was high-pressure plunger dosing with the SPRING range.
The Problem
The difficulty lies in high temperature and pressure with both steam and saline water; at the same time drift under high temperature and pressure, with very costly unplanned outages. Specification therefore means selected by pressure class, flow range and seal type.
What We Did
We took a plunger pump series approach — plunger-pump solution for high-pressure, low-flow duty. Delivery was built around selected by pressure class, flow range and seal type, with point-by-point checks on: compliance with power-industry codes and unit availability targets.
Operating Outcome
In service the system performs as intended — well suited to high-pressure RO and boiler chemical dosing, with routine maintenance falling noticeably.