Pressure gauge - radial, D 50, 0 - 6 bar

Product detailed description

This radial pressure gauge is commonly used in residential and commercial buildings to monitor pressure levels in central heating, domestic hot and cold water systems, and pump circuits. Installers typically mount it near circulation pumps, expansion vessels or boiler systems to ensure stable and safe operation. In these environments, accurate pressure readings help detect leaks, blockages or pump inefficiencies early.

The compact 50 mm dial allows for easy reading in tight spaces, while the 0–6 bar range covers standard operating pressures for most low-pressure hydraulic systems. The gauge is suitable for applications involving non-corrosive liquids such as water-based heating fluids and potable water supplies. Its mechanical design ensures reliable performance under normal ambient conditions found in technical rooms and utility areas.

Technical parameters

Diameter	50 mm
Weight	0.065 kg
Code	MR50006BB
Brand	IVAR

The 50 mm diameter ensures sufficient readability for periodic checks while remaining compatible with standard mounting panels. The 0–6 bar measurement range is appropriate for most closed-loop heating and domestic water systems. The 1/4 inch male thread provides secure connection to standard pipe fittings and valves. These parameters should be verified against the system’s hydraulic design to confirm suitability for the intended application.Installation and connection To install the gauge, first turn off the system and close the isolation valve upstream of the fitting point. Clean the threads of the pipe or valve to remove debris and apply a sealing compound or PTFE tape to the male 1/4 inch thread. Insert the gauge until it seats fully and tighten gently using a spanner. Avoid over-tightening to prevent damage to the glass face or internal components. Common mistakes include incorrect orientation—this gauge is designed for horizontal mounting—and failure to isolate the circuit during installation. After installation, slowly open the isolation valve to allow pressure to build up gradually and check for leaks around the connection. Always verify the zero point of the gauge when the system is depressurised.Compatibility and accessories This pressure gauge is compatible with standard 1/4 inch threaded valves, pipe unions and shut-off devices used in heating and plumbing systems. For larger installations or custom requirements, the 80 mm version is available upon request. No additional accessories are required unless specified by local regulations or system design criteria. Ensure the system medium is compatible with the gauge’s materials before installation.

Technical background for designers

The gauge operates based on a Bourdon tube mechanism, where internal pressure causes the tube to deform and move a pointer across the scale. The case and stem are typically made of brass or stainless steel, depending on the model, which offers resistance to corrosion and wear. The glass face is usually made of tempered safety glass to prevent shattering in the event of impact. Proper positioning within the system is critical to avoid exposure to excessive vibration or thermal fluctuations that could affect accuracy or longevity. For integration into control systems, the gauge serves as a visual reference rather than a signal-generating component. Designers should consider the location of access points and visibility for routine inspections. The operating life depends on the frequency of pressure surges and the quality of installation—secure mounting and regular checks can extend service life.

Service and operation

Periodic visual inspections are recommended to check for signs of physical damage, such as cracks in the glass or bent pointer. The gauge should be tested for accuracy using a certified reference instrument if part of a safety-critical system. No scheduled calibration intervals are specified in the brief; however, any noticeable deviation from expected readings requires immediate verification by a qualified technician. During operation, ensure the system pressure does not exceed the maximum limit of 6 bar. Sudden pressure spikes or frequent cycling can degrade the internal mechanism over time. If the gauge fails to return to zero after depressurisation, it indicates potential internal damage and the unit should be replaced.

Frequently asked questions

Can this gauge be mounted vertically?
No, the radial design is intended for horizontal mounting to ensure proper function and readability.

Is the gauge suitable for steam systems?
No, the brief does not specify steam compatibility; it is intended for liquid-based systems only.

What sealant should be used on the 1/4 inch thread?
A PTFE-based sealing tape or compound suitable for copper or brass threads is recommended.

Can the pressure range be adjusted after installation?
No, the 0–6 bar range is fixed and cannot be modified post-production.