Glycerin-Filled Pressure Gauge – 0–10 Bar | UV Water Systems Oman

A pressure gauge does not seem like a sophisticated instrument — but the correct gauge correctly positioned is one of the most informative diagnostic tools in a water treatment system. Pressure measurements across filter housings reveal filter loading (rising differential pressure = loaded cartridge), across RO membrane elements reveal membrane fouling (rising differential pressure at constant flow = scaling or biofouling), and at pump discharge verify pump performance against design specifications. UV Water Systems in Muscat installs glycerin-filled pressure gauges at all critical measurement points in RO systems, softeners, filter systems, and UV installations across Oman. Glycerin filling is not optional for water treatment applications — the pumps and valves in RO and water treatment systems generate pressure pulsations that cause a dry-gauge needle to oscillate so rapidly that the reading is unreadable and the gauge mechanism fatigues and fails within weeks. The glycerin fill damps these oscillations, stabilises the needle, and dramatically extends gauge service life in pulsating service.

Reading Pressure Gauges for RO System Diagnostics

A technician who understands the four key pressure readings in an RO system can diagnose most faults without removing any components. Feed pressure (before pre-filters): normal at 2–5 bar. Pre-filter differential (feed minus post-pre-filter): normal at 0.1–0.3 bar; increasing to 0.8–1.0 bar indicates loaded cartridges requiring replacement. Pump discharge pressure: normally 10–15 bar for a residential 50 GPD system; low pressure indicates pump wear or inlet restriction. Concentrate pressure: normally 7–10 bar; high concentrate pressure with low permeate flow indicates a blocked concentrate valve or fouled membrane. UV Water Systems technicians use gauge readings as the first step in every RO system diagnostic visit — gauges cost far less than the time spent troubleshooting a system without pressure data.

Key Features and Benefits

Glycerin fill for pulsation damping: Glycerin (food-grade, clear) fills the gauge case, damping the needle oscillation caused by RO pump and dosing pump pressure pulsations — provides a stable, readable pressure indication in all water treatment pump service conditions encountered in Oman.
0–10 bar range for pre-treatment and RO applications: Covers the pressure range of RO pre-treatment systems (2–5 bar feed, 0–2 bar filter differential), softener service (2–5 bar), UV sterilizer inlet (2–6 bar), and post-pump pressure monitoring in residential and commercial RO systems across Oman.
Stainless steel Bourdon tube and movement: 316 SS Bourdon tube and internal movement for compatibility with chlorinated municipal water, RO concentrate (elevated TDS), and brine streams — no brass internal components that corrode in high-TDS or low-pH process water conditions.
63mm dial for clear reading: Standard 63mm diameter dial with clear scale markings in 0.2 bar increments — readable from 1 metre distance during routine operator rounds, without magnification or close inspection.
1/4-inch or 1/2-inch NPT/BSP bottom or back mount: Standard connection options for installation in both panel-mounted manifold blocks and direct pipe connection tees — UV Water Systems carries both connection configurations in stock for immediate availability at all installation types in Muscat.

Technical Specifications

Pressure range: 0–10 bar
Fill medium: Glycerin (food-grade)
Dial diameter: 63 mm
Wetted materials: 316 SS Bourdon tube
Connection: 1/4-inch or 1/2-inch NPT/BSP bottom or back
Accuracy: ±2.5% full scale (Class 2.5)

Applications Across Oman

Glycerin pressure gauges from UV Water Systems are installed in all RO systems, softeners, filter housings, pump skids, and UV sterilizer installations across Muscat. UV Water Systems stocks 0–10 bar and 0–20 bar glycerin gauges in 63mm and 100mm dial sizes for immediate supply to installation and service jobs in Oman — contact +968 9763 7786 to order.

Frequently Asked Questions

How do I read filter loading from a pressure gauge? Install one pressure gauge before and one after the filter housing (or read from gauges already installed if present). The difference between the two readings is the pressure drop across the filter. A new cartridge typically shows 0.1–0.2 bar differential at design flow. When differential rises to 0.7–1.0 bar, the cartridge is loaded and must be replaced to prevent flow restriction and possible cartridge bypass. This is the most reliable indicator of when to replace filter cartridges in Oman’s variable-turbidity water conditions.

Can I replace a leaking gauge myself on my RO system? Yes — gauge replacement is straightforward. Isolate the water supply, depressurise the line, use a wrench on the gauge body (not the dial) to unscrew from the tee or manifold, apply PTFE tape to the new gauge thread, and hand-tighten plus one full turn with a wrench. UV Water Systems supplies replacement gauges for all standard RO connection sizes — call +968 9763 7786 for same-day supply and installation in Muscat.

UV Water Systems is an ISO 9001:2015 certified water treatment company based in Muscat, Sultanate of Oman, with 14+ years of experience. We supply, install, and service water treatment solutions for residential, commercial, and industrial clients across Oman. Call +968 9763 7786 or visit www.uvwater.biz.

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Glycerin Pressure Gauge 0-10 Bar – UV Water Systems Oman