Seko PS1D025C21H4000 - Motor-Driven pump Spring, 50 l/hod, 20 bar, SS316/FPM, 0.25 kW, 230 V
PS1D025C21H4000
SEKO Spring PS1D025C21H4000 is a motor-driven plunger dosing pump with spring return, designed for precise chemical dosing at low to medium flow rates and higher backpressures.
This version uses a Ø25 mm plunger and a 15 mm stroke. The flow of 50 l/h at 20 bar applies to this order code. Flow adjustment: manual, 0–100% of stroke length.
★Key benefits
⚗Typical applications
Configuration of this version
For motor-driven Spring PS1 pumps, the mechanism, plunger hydraulics, head material, motor and control method must be distinguished. The configuration below applies to code PS1D025C21H4000.
Technical specifications
Performance and mechanism
| Maximum flow rate | 50 l/h |
| Maximum operating pressure | 20 bar |
| Plunger diameter | 25 mm |
| Nominal stroke length | 15 mm |
| Stroke rate | 116 strokes/min |
| Gear ratio | 12:1 |
| Flow adjustment | manual, 0–100% of stroke length |
| Suction connection | BSPF 3/8" |
| Discharge connection | BSPF 3/8" |
Construction and motor
| Manufacturer / series | SEKO / Spring PS1 |
| Product code | PS1D025C21H4000 |
| HS / CN code | 841350 / 84135040 |
| Dosing head body | SS316L |
| Valve balls | SS316L |
| Plunger / seats | SS316L / SS316L |
| Seals | FPM |
| Motor | 0.25 kW · 4p · 1ph |
| Power supply | 230 V AC · 50 Hz |
| Motor protection rating | IP55 |
| Reference weight | approx. 10 kg – reference standard 3-phase version |
| Packing dimensions | 435 × 295 × 520 mm – reference standard 3-phase version |
Hydraulic family D025 – rated operating points
Both D025 variants use a Ø25 mm plunger and a 15 mm stroke. The points apply to the SS316L / FPM configuration. The current variant C is highlighted in blue.
Hydraulic variants D025
Mechanism D025
Hydraulic family D025 uses a Ø25 mm plunger and a 15 mm stroke.
| Variant | Strokes/min | Flow rate | Pressure |
|---|---|---|---|
| A | 58 | 25 l/h | 20 bar |
| C | 116 | 50 l/h | 20 bar |
Materials and chemical resistance
Compatibility must always be checked for the specific chemical, concentration and operating temperature.
Check chemical resistanceStandard Spring PS1 range overview
Standard PS1 hydraulic sizes with a 15 mm stroke. The current family D025 is highlighted in blue.
| Hydraulics | Plunger | Stroke | Flow A / C | Max. pressure SS316 / PVC | Standard motor |
|---|---|---|---|---|---|
| D006 | 6 mm | 15 mm | 1.5 / 3 l/h | 20 / 10 bar | 0.18 kW |
| D011 | 11 mm | 15 mm | 5 / 10 l/h | 20 / 10 bar | 0.18 kW |
| D017 | 17 mm | 15 mm | 11 / 22 l/h | 20 / 10 bar | 0.18 kW |
| D025 | 25 mm | 15 mm | 25 / 50 l/h | 20 / 10 bar | 0.18 kW |
| D030 | 30 mm | 15 mm | 35 / 70 l/h | 20 / 10 bar | 0.25 kW |
| D038 | 38 mm | 15 mm | 55 / 110 l/h | 17 / 10 bar | 0.25 kW |
| D048 | 48 mm | 15 mm | 85 / 170 l/h | 10 / 10 bar | 0.25 kW |
| D054 | 54 mm | 15 mm | 110 / 220 l/h | 8 / 8 bar | 0.25 kW |
| D064 | 64 mm | 15 mm | 152 / 304 l/h | 6 / 4 bar | 0.25 kW |
Spare parts for PS1D025C21H4000
Hydraulic and mechanical service parts matching the configuration D025C · plunger Ø25 mm · stroke 15 mm · 116 strokes/min · SS316L / FPM.
Suitable accessories for PS1D025C21H4000
Accessories for 50 l/h, 20 bar hydraulics, 3/8" connections and SS316L / FPM materials. Wetted materials, settings and connection sizes must suit the installation.
For an operating pressure of 20 bar, we will select a safety valve and dampener with the appropriate pressure rating and wetted materials for the medium.
SEKO Spring PS1 ordering code
The Spring PS1 order code has ten fields. The configuration of this pump is highlighted in blue.
| Field 1 · Pump type | |
|---|---|
| P | Plunger pump |
| Field 2 · Mechanism | |
|---|---|
| S1 | Spring return |
| Field 3 · Stroke length | |
|---|---|
| D | 15 mm |
| Field 4 · Plunger diameter | |
|---|---|
| 006 | Ø6 mm |
| 011 | Ø11 mm |
| 017 | Ø17 mm |
| 025 | Ø25 mm |
| 030 | Ø30 mm |
| 038 | Ø38 mm |
| 048 | Ø48 mm |
| 054 | Ø54 mm |
| 064 | Ø64 mm |
| Field 5 · Stroke rate / gear ratio | |
|---|---|
| A | 58/min · 24:1 |
| C | 116/min · 12:1 |
| Field 6 · Dosing head | |
|---|---|
| 21 | SS316L / SS316L / FPM |
| 24 | SS316L / SS316L / EPDM |
| 31 | PVC / ceramic / PTFE / FPM |
| 34 | PVC / ceramic / PTFE / EPDM |
| Field 7 · Motor | |
|---|---|
| S0 | Without motor |
| A4 | 0.18 kW · 3ph · 230–400 V AC · 63-B14 |
| B4 | 0.25 kW · 3ph · 230–400 V AC · 71-B14 |
| H4 | 0.25 kW · 1ph · 230 V AC · 71-B14 |
| I4 | 0.37 kW · 1ph · 230 V AC · 71-B14 |
| C0 | 0.40 kW · 12 V DC |
| AE | 0.18 kW · 3ph · Elektra · 63-B14 |
| BE | 0.25 kW · 3ph · Elektra · 71-B14 |
| CE | 0.37 kW · 3ph · Elektra · 71-B14 |
| Field 8 · Stroke adjustment | |
|---|---|
| 0 | Manual adjustment knob |
| L | Automatic · linear actuator AKTUA |
| Field 9 · Customisation | |
|---|---|
| 0 | Standard |
| H | High pressure |
| Field 10 · Options | |
|---|---|
| 0 | Standard |
| 2 | For S0: motor adapter |
| E | Forced motor cooling; fan 230 V AC |
| N | Elektra · Wi-Fi |
| Délka zdvihu | 15 mm |
| Kategorie | Čerpadla |
| Krytí | IP55 |
| Max. Průtok | 50 l/h |
| Max. Teplota | 90 °C |
| Max. Výtlak | 20 bar |
| Píst | SS316 |
| Hlava | SS316 |
| Motor | 0.25 kW |
| Napětí | 230 V |
| O-kroužek | FPM |
| Průměr pístu | 25 mm |
| Připojení | 3/8" G F |
| Sedla | SS316 |
| Typ | Membránové |
| Ventily | SS316 |
| Výrobce | SEKO S.p.A. |
| Zdvih / min | 116 |
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