OEM 63mm Oil-Filled Bottom Mount Pressure Gauge – 1/4 BSP Brass | China Suppliers & Factory for Reliable Industrial Measurement Suppliers, Factory

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Introducing our high-quality semi-stainless steel bottom oil-filled pressure gauges, designed for exceptional performance in industrial settings. Manufactured with durable stainless steel housing (commonly 304 or 316), these mechanical pressure measuring instruments are filled with shock-absorbing fluids like silicone oil or glycerin. The pressure port located at the bottom of the gauge ensures easy installation and functionality. Our gauges combine corrosion resistance, vibration dampening, and innovative design, making them an ideal choice for stable and reliable pressure monitoring in challenging conditions across various industries.

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As leading suppliers in China, we recognize that semi-stainless steel bottom oil-filled pressure gauges are the classic practical warriors of industrial measurement. They offer a perfect balance between cost and performance while ensuring durability, especially in environments exposed to vibration, humidity, and corrosive elements. Count on our gauges for intuitive and reliable pressure readings, vital for maintaining the safe and efficient operation of your equipment. Trust our factory for quality you can depend on.

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Product Description

📋 Product Specifications
Case Stainless Steel
Size 60mm (2.5")
Ring (Cover) Stainless Steel
Window PC
Pointer Aluminum Alloy, Black Finished
Connection Brass
Connection Location Lower
Thread 1/4" BSP
Element (Bourdon Tube) Brass
Movement Brass
Dial Plate White Aluminum with Black Graduations
Core Characteristics and Advantages
💡 High Cost-Performance Ratio
Compared to fully "all-steel" gauges where all core components are stainless steel, this gauge offers a higher cost-performance ratio while still maintaining excellent corrosion resistance across demanding environments.
🛢️ Oil-Filled Design — Key Advantages
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Vibration & Shock Resistance Effectively buffers medium pressure pulsations and mechanical vibrations, preventing pointer jitter and ensuring stable, clear readings.
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Lubrication & Rust Prevention Lubricates transmission components, reduces wear, and isolates internal parts from air to prevent oxidation and corrosion.
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Moisture & Dust Protection Prevents condensation and dust from entering the gauge — ideal for humid and dusty operating environments.
Extended Service Life Significantly prolongs the instrument's lifespan under vibration and shock conditions compared to dry-type gauges.
🏭 Typical Application Fields
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Hydraulic & Pneumatic Systems Engineering machinery, injection molding machines, compressors, and more.
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Fluid Transport & Process Control Water pumps, petrochemical plants, water treatment facilities, and piping systems.
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Mechanical Equipment Air conditioning & refrigeration equipment, marine vessels, and diesel engines.
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Harsh Environments Measurement points subject to vibration, media pulsation, or outdoor moisture protection requirements.
Frequently Asked Questions
Q What is the advantage of a stainless steel case over a brass or carbon steel case?
A stainless steel case offers superior corrosion resistance, making it suitable for humid, outdoor, or mildly corrosive environments. It also provides a cleaner, more professional appearance and longer structural durability compared to standard brass or carbon steel housings.
Q Why is this gauge oil-filled, and what fluid is used inside?
The gauge is oil-filled (typically with glycerin or silicone oil) to dampen vibration and pressure pulsations, lubricate internal components, and protect against moisture and dust ingress. This makes it far more reliable and longer-lasting in dynamic or harsh operating conditions compared to dry-type gauges.
Q What does the 1/4" BSP thread connection mean, and is it compatible with NPT fittings?
BSP (British Standard Pipe) is a parallel or tapered thread standard widely used in Europe, Asia, and Australia. It is not directly interchangeable with NPT (National Pipe Taper) fittings used in North America. If your system uses NPT connections, an adapter will be required to ensure a proper seal.
Q Is this pressure gauge suitable for use with corrosive media such as acids or seawater?
The Bourdon tube and movement are made of brass, which offers moderate corrosion resistance but is not recommended for highly acidic, alkaline, or seawater media. For aggressive media, a diaphragm seal or a gauge with an all-stainless-steel wetted parts configuration would be more appropriate.
Q Can this gauge be installed in any orientation, or must it be mounted upright?
Because this is a lower-connection (bottom-entry) gauge, it is typically designed for panel or pipe mounting with the dial facing the operator. While it can function in various orientations, upright or face-forward mounting is recommended to maintain reading accuracy and prevent oil leakage over time.
Q How do I know when the pressure gauge needs to be replaced or recalibrated?
Signs that a gauge may need replacement or recalibration include persistent pointer jitter even in stable conditions, a pointer that does not return to zero when pressure is released, visible oil leakage from the case, a cracked or fogged window, or readings that are inconsistent with system expectations. Regular inspection intervals are recommended based on the severity of the operating environment.

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