Liquid Filled Water Pressure Gauge
Accuracy level: ±1.6%
Case diameter: 40/50/60/100mm
Case Material: 304 stainless steel
Movement material: brass
Measurement range: 0.6-5Mpa
Product Overview
The Liquid Filled Water Pressure Gauge is an anti-vibration stainless steel instrument designed for accurate pressure monitoring in water treatment and industrial systems.
Filled with damping liquid (glycerin or silicone oil), it effectively absorbs pulsation and mechanical vibration-ideal for RO plants, booster pumps, and chemical dosing systems.
Available in multiple sizes (Y40/Y50/Y60/Y100) and pressure ranges (0.6–3.0 MPa), this gauge ensures stable readings even in harsh environments with moisture, chemical exposure, or mechanical shock.
Product Variants & Specifications
| Model | Outer Diameter | Pressure Range (MPa) | Connection Type | Mounting Style | Thread Standard | Material | Accuracy | Fill Type |
|---|---|---|---|---|---|---|---|---|
| Y40 | 40 mm | 0.6 / 1.0 | Threaded | Radial | 1/4" NPT | 304 SS | ±1.6% | Glycerin |
| Y50 | 50 mm | 0.6 / 1.6 / 2.5 | Threaded / Quick | Axial / Radial | 1/4" NPT | 304 SS | ±1.6% | Glycerin |
| Y60 | 60 mm | 1.0 / 1.6 / 2.5 | Threaded / Quick | Axial / Radial | 1/4" NPT | 304 SS | ±1.6% | Glycerin |
| Y100 | 100 mm | 1.6 / 2.5 / 3.0 | Threaded | Radial | 1/4" NPT | 304 SS | ±1.6% | Glycerin |
Why Liquid-Filled Gauges Perform Better Compared with Ordinary Dry Gauges
| Feature | Our Liquid-Filled Gauge | Ordinary Dry Gauge | Benefit |
|---|---|---|---|
| Anti-Vibration | Yes (internal damping oil) | No | Steady needle under RO pump vibration |
| Material | 304 SS case | Iron/plastic | Rust-free in wet & chemical environments |
| Accuracy | ±1.6% | ±2.5% | Reliable readings prevent overpressure |
| Durability | 3× longer life | Short service life | Lower maintenance cost |
| Protection Level | IP65 | None | Water & dust resistant |
Structural Principle
The gauge includes a Bourdon tube, gear transmission mechanism, and indicator system.
When pressurized water or gas enters the Bourdon tube, it expands slightly; the resulting mechanical movement drives the needle to display real-time pressure.
The liquid filling dampens vibration, stabilizing the needle and protecting internal components.
Installation Types
Radial Mount (Bottom Connection): For control panels or vertical installations on RO skids.
Axial Mount (Back Connection): For direct pipeline or pump connection.
Quick Connector Version: Enables tool-free replacement and pressure testing during maintenance.
Typical Pressure Ranges & Applications
| Pressure Range (MPa) | Common Use | Recommended Model |
|---|---|---|
| 0–0.6 | RO inlet / outlet monitoring | Y50 / Y60 |
| 0–1.0 | UF or softener systems | Y60 |
| 0–1.6 | Industrial pump lines | Y60 / Y100 |
| 0–2.5 | Chemical dosing systems | Y100 |
| 0–3.0 | High-pressure RO / boiler feed | Y100 |
Where It's Used
- RO & UF Systems: Protect membranes from pressure spikes.
- Water Softener Units: Track resin backwash pressure.
- Industrial Pumps: Monitor flow and prevent overload.
- Desalination & Brackish Water Systems: Maintain stable inlet pressure.
- Hydraulic & Pneumatic Equipment: Reliable in high-vibration environments.
FAQ
Q1: Why use a liquid-filled gauge instead of a dry one?
A: The damping oil absorbs vibration and pulsation, ensuring stable readings and preventing needle fatigue-ideal for systems with fluctuating pressure such as RO pumps.
Q2: Which size (Y40–Y100) should I choose?
A:
- Y40/Y50 – Compact systems, portable RO units
- Y60 – Standard RO or UF skids
- Y100 – Industrial lines or high-visibility installations
Q3: Can it handle corrosive liquids?
A: Yes, the 304 stainless steel shell and brass or SS internals resist corrosion. For strong acids or alkalis, 316L stainless version is available.
Q4: When should I replace the gauge?
A: Replace if:
- The needle doesn't return to zero
- There's visible oil leakage
- Reading differs from calibration reference
- Recommended calibration: every 12 months.
Q5: Is customization available?
A: Yes. You can specify pressure range, connection type (quick or thread), and dial logo for OEM projects.
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