Practical Guide
Choosing & Setting Up WIWA Low-Pressure Pumps GX Correctly
This guide provides a hands-on approach to selecting the right WIWA Low-Pressure Pumps GX for paint, water, glue, or ISO materials, setting them up effectively (as guidelines), and operating them reliably in daily use – including workflow, troubleshooting, and maintenance.
Model Selection
Setup Guidelines
Troubleshooting
Maintenance
Tip: For viscous media, it's not just about pressure – but primarily about stable material flow and clean delivery.
Why GX Low-Pressure Pumps are so popular in daily operations
- Optimized material flow for easier cleaning and more stable supply.
- Service-friendly due to coarser threads – assembly/disassembly is much easier.
- Large material valves: even higher-viscosity media can be primed more easily.
- Spring-loaded packings: maintenance-friendly and designed for longevity.
- Interesting for ISO applications: closed system via an encapsulable release agent chamber (advantageous for ISO materials).
(Summary from brochure/product page – values and versions may vary depending on the variant.)
KPI #1
4.33–8.8 l/min
Max. output per 60 cycles (model dependent)
KPI #2
14.4–60.8 bar
Max. operating pressure (depending on model)
KPI #3
Maintenance Focus
Service-friendly design (threads/packings)
Product Overview: GX Models, Variants & Typical Uses
| Model (Example) | Output / 60 Cycles | Pressure Ratio | Max. Operating Pressure | Best Fit? |
|---|---|---|---|---|
| 72.03.7 Standard / ISO / Water / Glue |
4.33 l/min | 3.7:1 | 29.6 bar | Stable supply at moderate pressures, e.g., coating and conveying tasks with "smooth" pressure requirements. |
| 72.07.6 Standard / ISO / Water / Glue |
4.33 l/min | 7.6:1 | 60.8 bar | When you need more pressure reserve for the same volume (e.g., longer lines, higher resistance, more viscous media). |
| 146.01.8 Standard / ISO / Water / Glue (short/long) |
8.8 l/min | 1.8:1 | 14.4 bar | When you need higher throughput at low pressures (e.g., supply, circulation, media with lower pressure requirements). |
Quick Explanation: Standard / ISO / Water / Glue
- Standard: General version (short/long possible, depending on model).
- ISO: With closed packing/sealing concept and special seals – advantageous for isocyanate-containing media.
- Water: Stainless steel/special seals, partly with double pistons (designed for water-based media).
- Glue: For cold glue/glue supply (e.g., labeling/dowel applications).
Materials & Industries (Excerpt)
Typical media: sprayable lacquers/paints, water-based and solvent-based coatings, oils/greases, release agents, stains, adhesives/glues, plastisols, sealants, bitumen, epoxies, underbody protection, insulating/thick-film media, and other high-viscosity media (also ISO/isocyanates depending on the variant).
Practical Tip: "De-stress" viscosity before cranking up the pressure
If the material flow is sluggish (cold, high viscosity, long lines), a heated follower plate is often the cleaner solution:
It supports the delivery of high-viscosity media and can be designed for up to max. 85 °C (depending on model/equipment).
Result: less "jerking," stable throughput, often easier to clean – and you don't have to push the system unnecessarily high.
CTA: Find suitable GX models directly on Beschicht.com
Choose the variant suitable for your medium & application (stainless steel/short/long, ISO/Water/Glue). If unsure: better to check 1–2 key details (medium, viscosity, desired throughput, line length) – then the selection will be spot on.
Recommended Basic Settings (Derived guidelines)
The following points are guidelines because specific system parameters (line length, temperature, medium, viscosity, nozzles/users) vary greatly. Basic rule: never exceed the max. operating pressure of the selected model – and use only as much pressure as necessary.
| Parameter | Guideline | Why |
|---|---|---|
| Material Pressure Regulation | Select/set regulator so that the required working pressure range is covered (e.g., manual regulator 10–320 bar depending on version/part number). | Regulators limit the output pressure, help with fluctuating input pressures, and can compensate for pulsation from piston pumps – for more uniform material flow. |
| "Gentle" Start | Start with low compressed air/system power, prime material, then increase step-by-step until process is stable. | Prevents unnecessary shear, reduces risk of leakage/overpressure, and makes venting easier. |
| Temperature/Viscosity Lever | For viscous media, check heating options (follower plate/hose) – e.g., follower plate up to max. 85 °C (depending on equipment). | More stable flow, less cavitation/interruptions – often cleaner than "increasing pressure." |
Professional Workflow (5–7 Steps)
- Define Medium & Variant: Standard vs. ISO/Water/Glue matching the material (moisture sensitivity, water, cold glue, etc.).
- Select Model by Pressure/Flow: Match throughput (l/min) and required pressure reserve (bar) against max. operating pressure.
- Stabilize Container Setup: Choose follower plate/cover suitable for the container (O-ring vs. Lipseal). Goal: smooth suction and uniform flow.
- Plan Regulation/Monitoring: Use material pressure regulators so that the output pressure is not exceeded and the flow remains stable.
- Start Gently: Start low, vent, then increase gradually until the desired application is achieved stably at the user point.
- For Viscosity: Temperature over Pressure: Use heating options (follower plate/hose) before aggressively increasing pressure.
- Cleaning/Maintenance as Routine: Establish short cleaning and check points at the end of each shift.
Troubleshooting (4 Typical Problems → Actions)
1) Pulsation / Uneven Application
- Dimension and set material pressure regulator correctly – it helps limit pressure peaks and compensate for pulsation.
- Check lines/users for bottlenecks (filters, valves, couplings).
- Stabilize temperature/viscosity (for viscous media, check heating options).
2) Insufficient Throughput / "Drawing Air"
- Stabilize suction: Follower plate/cover matching the container, check seals; goal is constant product flow (avoid cavitation).
- Lower viscosity (heat) instead of just increasing pressure.
- Material valves/cleaning: Deposits and dried residues are classics.
3) ISO Material Reacts / Curing Issues
- Use ISO version (closed system/release agent chamber concept is advantageous here).
- Minimize moisture ingress: Container/lid sealed, short downtimes, clean processes.
- Disciplined adherence to maintenance/replacement intervals for seals.
4) Leakage / Poor Pressure Build-up
- Respect max. operating pressure of the model, then systematically seal (connections, seals, packings).
- Check assembly status: service-friendly threads help, but correct tightening/insertion is crucial.
- For abrasive/reactive media, choose suitable regulator/seal variants (diaphragm vs. piston depending on material).
Maintenance (5 Points That Really Matter)
- Cleaning as Standard Process: The optimized material flow supports cleanability – still, flush and keep clean consistently.
- Check Packings/Seals: Spring-loaded packings are robust, but wear monitoring prevents downtime.
- Maintain Material Pressure Regulator: Regulators stabilize the process and compensate for pulsation – clean condition = stable application.
- Check Suction/Container Technology: Keep follower plate/cover and seals tight to avoid cavitation and "drawing air."
- Operate Heating Options Safely: Observe temperature limits (e.g., follower plate up to max. 85 °C depending on version) and check wiring/regulators.
FAQ (Practical relevance)
Which GX pump is "better": 72.03.7 or 72.07.6?
Both deliver 4.33 l/min in the example; the difference is the pressure ratio and max. operating pressure. If you need more pressure reserve, the 72.07.6 is often the more suitable choice.
When should I take the 146.01.8 instead of the 72 models?
When you want higher throughput at lower pressures: the 146.01.8 is designed for 8.8 l/min at 1.8:1 (model dependent).
ISO Version: Do I really need to use it?
For isocyanate-containing/moisture-sensitive media, ISO is sensible because the seal/packing concept and the closed system (release agent chamber) are specifically designed for it.
What does a material pressure regulator actually provide?
It ensures that a set output pressure is not exceeded or that the working pressure is reached even if input pressure fluctuates – additionally, it can compensate for pulsation, keeping application quality stable.
Pressure problems with viscous material – what is the fastest lever?
Often: improve temperature/flow (e.g., heated follower plate/hose) instead of just increasing pressure. This reduces stress in the system and makes the process smoother.
Conclusion
WIWA Low-Pressure Pumps GX are a powerful solution when you need to convey material reliably and keep your supply stable – from paint to glue, from water to ISO. By correctly selecting the model (pressure/flow) and variant (Standard/ISO/Water/Glue), stabilizing with regulators, and optimizing temperature/suction for viscous media, you get a smooth process with high practical suitability.
Note: All values are summarized from manufacturer documents/product pages and may vary depending on configuration/version. If in doubt, check the nameplate/documentation of the specific version.
