Description
“Ji” Japsin Instrumentation Economical Glycerin-Filled Pressure Gauge – 0 to 100 MPa, 4-Inch Dial, Bottom Entry
The “Ji” Japsin Instrumentation Economical Glycerin-Filled Pressure Gauge is designed for high-pressure monitoring in industrial machinery, hydraulic systems, pressure testing equipment, manufacturing plants, and other compatible process applications. With a measuring range of 0 to 100 MPa (14400 PSI), this instrument is intended for applications that require pressure indication across a high-pressure operating range.
Featuring a large 4-inch (100 mm) dial, the gauge provides a clear analog display for routine pressure monitoring. Its glycerin-filled construction helps dampen pointer fluctuations caused by mechanical vibration and pressure pulsation, making readings easier to observe in suitable operating environments. The liquid filling also lubricates the internal movement, helping support smoother operation of the pointer mechanism.
The instrument is manufactured with a stainless steel case and stainless steel wetted parts, offering a durable construction for compatible industrial conditions. It features a case crimping-type design, direct-mounting bottom-entry configuration, and a 1/2-inch BSP male threaded connection. These specifications make it a practical option for equipment manufacturers, maintenance teams, industrial buyers, and process operators looking for a mechanical pressure indication instrument for high-pressure applications.
Key Features and Benefits
1. High-Pressure Measurement up to 100 MPa
The gauge is designed to measure positive pressure from 0 to 100 MPa, equivalent to approximately 14400 PSI. This wide measuring range makes it suitable for compatible high-pressure systems where accurate local pressure indication is required.
Selecting the correct pressure range is important for instrument readability and service life. The expected operating pressure, pressure fluctuations, and possible pressure spikes should be considered before selecting the gauge. Always ensure that the instrument is suitable for the maximum pressure conditions of the application.
2. Glycerin-Filled Construction
The glycerin-filled design helps reduce pointer oscillations caused by mechanical vibration and pressure pulsation. This is particularly useful in installations involving pumps, hydraulic equipment, compressors, and machinery where vibration may affect the readability of a conventional dry gauge.
The liquid filling also provides lubrication to the internal moving components, helping reduce friction and supporting smoother pointer movement. The suitability of glycerin filling depends on the ambient temperature and operating conditions, which should be checked against the manufacturer’s recommendations.
3. Dual-Scale Pressure Display
The instrument features a dual-scale dial with pressure readings in MPa and PSI. Its primary range is 0 to 100 MPa, with an additional scale of up to 14,400 PSI as specified.
The dual-scale arrangement helps operators read pressure in different measurement units without needing to perform manual conversions. This is convenient in industrial environments where machinery specifications, technical documents, and maintenance procedures may use different pressure units.
4. Large 4-Inch (100 mm) Dial
The 4-inch (100 mm) dial provides a larger viewing area for pressure indication. It is useful in industrial installations where operators need to observe readings from a practical distance during equipment operation, inspection, and maintenance.
The analog pointer display allows users to monitor pressure conditions directly without requiring an external electrical display or power supply.
5. Stainless Steel Case
The gauge features a stainless steel case with crimping-type construction. The case houses the internal measuring mechanism and glycerin filling, providing an enclosure for the instrument components.
Stainless steel is widely used in industrial instrumentation due to its durability and suitability for many general industrial environments. The actual suitability of the case depends on exposure to moisture, chemicals, corrosive conditions, and other environmental factors.
6. Stainless Steel Wetted Parts
The wetted parts are manufactured from stainless steel and come into contact with the process medium. Stainless steel construction is commonly selected for industrial pressure instruments where mechanical durability and corrosion resistance are important.
Material compatibility should always be checked against the process fluid, its concentration, temperature, and operating conditions. For demanding applications, confirm the exact stainless steel grade and chemical compatibility with the manufacturer before installation.
7. Direct Mounting with Bottom Entry
The gauge features a direct-mounting bottom-entry arrangement. The pressure connection extends from the bottom of the dial, allowing the instrument to be installed directly onto a compatible process fitting, pipeline connection, or equipment port.
This configuration is commonly used in hydraulic assemblies, pressure systems, and industrial machinery where the gauge is mounted directly at the pressure measurement point. Ensure that the installation provides adequate visibility and mechanical support.
8. 1/2-Inch BSP Male Connection
The instrument is equipped with a 1/2-inch BSP male threaded connection for installation in compatible pressure lines and fittings. Before installation, verify the thread standard, size, and mating connection.
Correct thread matching and appropriate sealing practices are essential for reducing leakage risks and supporting safe operation, particularly in high-pressure applications.
Working Principle of a Glycerin-Filled Pressure Gauge
The pressure gauge generally uses a Bourdon tube as its pressure-sensing element. When high-pressure fluid enters the instrument through the bottom connection, the Bourdon tube responds to the applied pressure by changing its shape. This movement is transferred through a mechanical linkage and gear mechanism to the pointer, which indicates the corresponding pressure value on the dial.
The glycerin filling helps dampen mechanical movement and pointer oscillations caused by vibration and pressure pulsation. It also lubricates the internal mechanism. As a mechanical instrument, the gauge does not require an external electrical power supply for pressure indication.
Industrial Applications
The “Ji” Japsin Instrumentation Economical Glycerin-Filled Pressure Gauge can be considered for various compatible high-pressure applications, including:
- Hydraulic systems: Monitoring pressure in compatible hydraulic equipment and circuits.
- High-pressure pumps: Observing operating pressure in suitable pumping systems.
- Pressure testing equipment: Providing local pressure indication during compatible testing operations.
- Industrial machinery: Monitoring pressure in high-pressure mechanical assemblies.
- Manufacturing plants: Supporting pressure monitoring during industrial production processes.
- Hydraulic power packs: Checking pressure conditions at suitable measurement points.
- General engineering: Pressure indication in compatible high-pressure equipment and systems.
The instrument must be selected according to the process medium, operating pressure, temperature, vibration level, and connection requirements.
Installation and Maintenance Recommendations
Before installation, verify that the pressure range and maximum allowable pressure are suitable for the application. High-pressure systems require particular attention to connection compatibility, pressure spikes, and safe installation practices.
Mount the gauge in a position where the dial is clearly visible and the bottom-entry connection can be installed without placing excessive mechanical stress on the instrument. Confirm that the 1/2-inch BSP male connection matches the mating fitting. Use appropriate high-pressure-rated fittings and sealing methods.
Avoid applying excessive tightening force to the case. Inspect the gauge periodically for visible damage, leakage, pointer irregularities, and changes in the glycerin filling. Follow the manufacturer’s recommendations for operating limits, inspection, and calibration.
Why Choose “Ji” Japsin Instrumentation?
Japsin Instrumentation supplies industrial pressure and temperature measurement instruments for process monitoring applications. The “Ji” Economical Glycerin-Filled Pressure Gauge combines a high-pressure measuring range, dual-scale display, large 4-inch dial, stainless steel construction, and glycerin-filled design.
Its direct-mounting bottom-entry arrangement makes it suitable for compatible high-pressure equipment and installations where local pressure indication is required. The glycerin filling helps improve pointer stability in applications subject to vibration and pressure pulsation.
Choose the “Ji” Japsin Instrumentation Economical Glycerin-Filled Pressure Gauge for practical mechanical pressure monitoring in suitable high-pressure industrial systems.
Japsin Instrumentation – Since 1974
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