Verifying the integrity of every meter of seam in installed geomembrane to certify the watertightness of a dam, landfill, or leaching cell under environmental standards requires a needle pressure gauge with a metal body, clear dial reading, and robust construction for continuous field use. This needle pressure gauge —also called an air pressure tester, weld channel tester, or air pressure gauge tester— is manufactured by KORWINS with a metal body, stainless steel needle, and ergonomic wooden handle, designed for geomembrane installation contractors, hydraulic works supervisors, and environmental quality control technicians.
Key benefits
- Industrial-grade metal body: robust construction sized for continuous field use, ambient humidity, quarry dust, and rough handling in sanitary landfills and mining, without losing calibration accuracy.
- Precision stainless steel insertion needle: tip sized to penetrate cleanly into the air channel of the dual weld without compromising the material structure, a critical condition for non-destructive seam testing.
- Clear, accurate dial reading: visible scale that allows pressure monitoring throughout the test cycle and immediate detection of any pressure drop indicative of a leak, an auditable condition for project certification.
- Ergonomic wooden handle: comfortable, firm grip that facilitates the manual force needed for needle insertion and handling during continuous testing cycles on long seams.
- Connection hose with quick coupling: high visibility and direct connection to portable air pumps or manual compressors, a condition for autonomous field operation without complex pneumatic equipment.
Typical applications and uses
- Quality control during geomembrane installation: verifying watertightness meter by meter on dual-seam welds.
- Environmental auditing of sanitary landfills and leaching cells under ISO 14001 or equivalent certification.
- Verification of waterproofing in dams, reservoirs, artificial lakes, and large-format agricultural water storage.
- Inspection of mining projects with leaching cells and chemical containment using structural HDPE or LLDPE.
Quality and durability
An economical field pressure gauge fails on two fronts: the initial calibration loses reliability after a few months of use (which produces false readings that invalidate later audits) and the insertion needle is made of low-grade steel that bends or rusts (which ruins the test on the first intensive use). KORWINS works with a calibrated metal body and a stainless steel needle, which separates a quality-control tester certifiable for auditing from a basic pressure gauge that certifies nothing.
What exactly is this pressure gauge for, and how does it relate to welding?
Non-destructive verification of the integrity of geomembrane seams welded with hot wedge double-track welding. The process: the wedge leaves an air channel between the two fusion lines. The gauge needle is inserted into this channel, the opposite end is sealed, and air is injected at the pressure specified by the project standard (typically between 1.5 and 2.5 bar). Monitoring over several minutes detects any pressure drop indicating a point leak in the seam. An auditable condition that hot air or extrusion welding does not allow direct verification in the same way.
Is it compatible with any geomembrane thickness?
Yes for the typical work-site thicknesses: from thin geomembranes (1 mm PVC or LLDPE in agricultural reservoirs) to thick (2.5 mm HDPE in mining and sanitary landfills). The needle is sized to penetrate the air channel of the double track regardless of the material thickness. The essential condition: the seam must actually be a double-track seam with a central channel; a single seam without a channel does not allow testing with this equipment. To verify extrusion seams (filler bead), other techniques such as vacuum box or spark testing are used.
What maintenance does the needle need to keep precision?
Basic but indispensable maintenance for auditing. Cleaning after each test to remove molten polyethylene residue or sealant from the channel that may clog the air-outlet hole. Periodic verification that the hose connection keeps a hermetic seal (a leak at the coupling invalidates the test by producing a false pressure drop). Tip protection when not in use (case or cap) to prevent bending and oxidation. Dial calibration every 6-12 months with a certified standard, since contractual audit tests require a current calibrated instrument.
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| General | |
|---|---|
| Pump type | Manual with support base |
| Indicator type | Analog pressure gauges |
| Resistencias y rendimiento | |
| Test time | 5 minutes |
| Riego y caudal | |
| Working pressure | 0.2 - 0.3 MPa (29.0 - 43.5 psi) |
| Machine: Width | 18.0 cm (7.09 in) |
|---|---|
| Machine: Height | 90.0 cm (35.43 in) |
| Machine: Depth | 10.0 cm (3.94 in) |
| Machine: Weight | 3.0 kg |
Official KORWINS warranty
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Confirmado el defecto: sustitución o devolución del valor pagado.
What's not covered
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