Description

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Designed for severe industrial environments, our Liquid Filled Lubrication Pressure Gauge dampens severe vibration and pulsation to ensure stable, highly accurate pressure readings, extending service life across hydraulic, pneumatic, and process applications.

Technical Specifications

Technical Parameter	Specification Range & Options
Dial Sizes	40mm, 50mm, 63mm, 75mm, 100mm, 150mm
Pressure Ranges	Vacuum, Compound, 0-1 bar up to 0-1000 bar (psi/kPa equivalents)
Accuracy Class	±1.0% to ±1.6% Full Scale (Depending on dial size)
Filling Liquid	Standard Glycerin (99.5%) or Optional Silicone Oil
Connection Threads	1/8", 1/4", 3/8", 1/2" (NPT, BSP, BSPT, M-threads)
Wetted Materials	Brass, Copper Alloy, or Full Stainless Steel (SS304 / SS316)
Ingress Protection	IP65 / IP67 Weatherproof rating
Operating Temperature	-20°C to +60°C (Glycerin), -40°C to +100°C (Silicone)

Key Features

Vibration Resistance: Internal dampening fluid effectively eliminates pointer flutter caused by engine or pump vibrations.

Pulsation Dampening: Shields internal gears and Bourdon tubes against rapid pressure spikes and fluid hammer.

Corrosion Protection: Sealed stainless steel casing prevents internal moisture ingress and external chemical attack.

Extended Operational Life: Continuous lubrication of internal movement parts significantly reduces mechanical wear.

Applications

Hydraulic Systems: Presses, power units, and mobile machinery experiencing high-frequency pressure surges.

Pumps & Compressors: Reciprocating air compressors and water booster pump skids.

Process Industry: Chemical processing plants, petrochemical refining, and pulp/paper mills.

Marine & Offshore: Saltwater environments requiring robust corrosion and vibration defenses.

Pressure Range

Vacuum & Compound: -76 cmHg to 0, and compound ranges (-1 to 15 bar) for suction lines and tanks.

Low Pressure: 0–1 bar up to 0–10 bar for water treatment and low-pressure fluid lines.

Medium to High Pressure: 0–100 bar, 0–400 bar, up to 0–1000 bar for high-pressure hydraulics, injection molding, and heavy industrial testing benches.

Dial Size

40mm / 50mm: Compact installations, hydraulic rescue tools, and tight panel spaces.

63mm / 75mm: The industry standard for mobile equipment, pneumatic panels, and pump skids.

100mm / 150mm: Large process plants, remote reading pipelines, and applications requiring high visual accuracy.

OEM / ODM Customization

Custom Dials: Print your company logo, custom color zones, dual scales (psi/bar, MPa), and unique part numbers directly onto the aluminum dial face.

Thread & Case Modifications: Custom thread lengths, special metric/Whitworth threads, and custom laser-etched stainless steel cases.

Custom Packaging: Individual branded boxes, barcoded labels, and bulk export palletization designed for streamlined warehouse stocking.

Standards & Certifications

Design Compliance: Manufactured strictly in accordance with EN 837-1 and ASME B40.100 international standards.

Ingress Protection: Certified IP65 and IP67 dustproof and waterproof ratings.

Quality Assurances: CE marked and RoHS compliant, ensuring legal trade and safe deployment across North American and European industrial markets.

FAQ

Q: What is a liquid filled pressure gauge?

A: It is a pressure-measuring instrument whose internal case is filled with a viscous fluid-typically glycerin or silicone oil-designed to dampen mechanical vibration and protect internal mechanisms.

Q: Why use glycerin in a pressure gauge?

A: Glycerin provides high-viscosity dampening that stops pointer jitter caused by engine vibration or pump pulsation, while simultaneously lubricating gears to prevent premature wear.

Q: Glycerin filled vs silicone filled: which one should I choose?

A: Choose glycerin for standard indoor or mild outdoor machinery operating between -20°C and 60°C. Choose silicone for extreme low/high temperatures (-40°C to 100°C) or outdoor applications prone to freezing and fogging.

Q: Can liquid filled pressure gauges be used on hydraulic systems?

A: Yes, they are ideal for hydraulic power units and presses because they absorb the severe pressure spikes and fluid hammer common in hydraulic circuits.

Q: Why is there a rubber plug on top of the gauge casing?

A: The rubber filling plug acts as a pressure-equalizing vent. During shipping or thermal expansion, it relieves internal casing pressure. Cutting or puncturing the tip prior to operation is required for proper atmospheric equalization.

Q: Do liquid filled gauges leak over time?

A: High-quality gauges utilize heavy-duty o-rings and tight crimped or bayonet bezels. When operated within recommended temperature limits, they remain completely leak-free for years.

Q: What accuracy classes do you offer?

A: Our industrial liquid filled gauges are manufactured to strict international standards, typically offering Class 1.0 (±1% full scale) or Class 1.6 (±1.6% full scale) accuracy.

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Liquid Filled Lubrication Pressure Gauge