Gv. internal - external, 5/4" FM

Product detailed description

This ball valve is commonly used in domestic and industrial water systems, including supply lines, irrigation, and drainage networks. Installers often fit these valves at branch points or isolation points in copper, plastic, or steel piping systems. The valve allows for quick shut-off and reliable sealing, making it suitable for applications where frequent operation is not required. It is particularly useful in systems where space constraints require an internal lever on one side and an external lever on the other. The nickel-plated brass body provides corrosion resistance and compatibility with potable water systems.

The design supports both internal and external lever operation, enabling access from either side of the pipe. This makes it ideal for installations where one side of the pipe is inaccessible or where a compact footprint is needed. The valve is not intended for aggressive media such as acids or solvents. It is recommended for use in heating, ventilation, and plumbing systems where non-corrosive liquids and gases are transported.

Technical parameters

Material	Nickel-plated brass CW617N, ATEST certified for potable water
Operating temperature	-20 °C
Nominal pressure	PN 25
Weight	0.516 kg
Code	8364R007
Brand	IVAR

The nominal pressure rating of PN25 indicates that the valve is suitable for systems operating at up to 25 bar. The operating temperature range from -20 °C to +120 °C ensures functionality in both cold and hot water applications. The material, nickel-plated brass CW617N, is certified for potable water use under ATEST standards. These parameters are essential for selecting the correct valve for a specific system, ensuring compatibility with pressure levels and environmental conditions.

Installation and connection

This valve connects via internal and external female metric threads (FM) of 5/4 inch. Before installation, verify that the thread type matches the adjacent fittings and that the pipe is clean and free of debris. Use a suitable thread sealant or PTFE tape to ensure a leak-free connection. Ensure the valve is aligned with the pipe axis to prevent stress on the body during operation. Avoid applying force to the lever when closing or opening the valve, as this can damage the internal components. A common mistake is misalignment of the lever position, which can lead to restricted flow or improper sealing. Always follow the manufacturer’s instructions regarding minimum clearance from welding points (at least 20 cm) and avoid exposing the valve to temperatures exceeding 185 °C during installation or operation.

Compatibility and accessories

This valve is compatible with standard water and air systems using copper, plastic, or steel piping. It can be combined with pipe fittings, unions, and lever extensions where additional leverage is required. For complete system integration, ensure that the adjacent fittings are also rated for PN25 and the same temperature range. No special accessories are required for standard installation, though lever extensions or protective covers may be added in exposed environments.

Technical background for designers

The valve operates on a ball-and-seat principle, where a rotating ball controls the flow of media through the pipeline. The specially shaped ball with surface recesses reduces contact area with the seat, preventing sediment and debris from interfering with the sealing surface. The nickel-plated brass body resists corrosion and maintains structural integrity over time. The ATEST certification confirms suitability for potable water. System designers should consider the valve’s PN25 rating and temperature limits when integrating into larger networks. Proper alignment and support of the pipe are critical to avoid mechanical stress on the valve body. The design prevents disassembly of the body, ensuring long-term reliability and reducing the risk of leaks or failures due to tampering.

Service and operation

The valve is designed for maintenance-free operation. However, it is recommended to cycle the valve fully once every six months in water systems to remove any accumulated deposits from the ball surface. The body is permanently bonded and sealed, and any attempt to disassemble, repair, or reuse the valve after damage will void its integrity. In the event of damage (excluding lever or handle replacement), the entire unit must be replaced. Regular visual inspections for leaks or physical damage are advised. Avoid using excessive force when operating the lever, as this can cause premature wear or failure of internal components.

Frequently asked questions

Can this valve be used in a hot water system?
Yes, it is suitable for hot water applications up to +120 °C, provided the system pressure does not exceed PN25.

Is it possible to replace the lever or handle separately?
Yes, the lever can be replaced independently if damaged, but the body itself cannot be disassembled or repaired.

Can this valve be used in a compressed air system?
Yes, it is suitable for non-aggressive media such as air and inert gases within the specified pressure and temperature ranges.

What should be done if the valve becomes stiff during operation?
If stiffness occurs, it is likely due to sediment buildup. Cycle the valve fully in both directions to clear the ball. If the issue persists, the valve should be replaced.