WAFER J9 - stainless steel disc; EPDM - DN 25; L=33mm BRA.J9.120

Product detailed description

Wafer-style shut-off valves like the WAFER J9 model are commonly used in heating, ventilation and water supply systems in residential and commercial buildings. These valves are installed between flanges in pipelines to allow or block the flow of media such as water or compressed air. They are often found in HVAC systems, domestic hot and cold water circuits, and industrial water distribution. The compact design and flange connection make them ideal for tight spaces and retrofitting in existing systems where flanged connections are already in place.

When installing such valves, it is essential to ensure that the flange faces are clean and parallel to prevent leakage. The valve must be aligned with the pipeline axis to avoid stress on the body or sealing components. The WAFER J9 is not suitable for steam or oily media due to the EPDM sealing material, which can degrade under such conditions.

Technical parameters

Material	body - ductile cast iron GJS 400-15
Nominal diameter	DN 25
Nominal pressure	PN 16/PN10
Weight	1.65 kg
Code	J9.120.025
Brand	IVAR

The valve's technical parameters are critical for correct sizing and system integration. The nominal diameter of DN 25 defines the flow capacity and compatibility with other components in the system. The pressure rating of PN 16/PN10 indicates the maximum allowable working pressure, which is essential for ensuring the valve can handle the system's operating conditions without failure. The body material, ductile cast iron GJS 400-15, provides sufficient strength and resistance to mechanical stress in typical heating and water applications.Installation and connection The WAFER J9 is installed between two flanges using a bolted connection. The nominal diameter of DN 25 corresponds to the flange size, and the valve must be aligned with the flange bolt holes. The body is designed to fit between PN 16, PN 10 or PN 6 flanges as per EN 1092-1 standards. During installation, it is important to ensure that the flange faces are free from debris and that the valve is not forced into position, which could damage the sealing components. A common mistake is misalignment of the valve body, which can cause uneven stress on the sealing disc and lead to premature failure. The operating temperature range of -10°C to +120°C must also be considered to ensure the EPDM sealing material remains effective.Compatibility and accessories The WAFER J9 is compatible with standard PN 16, PN 10 and PN 6 flanged connections. It is typically used in conjunction with other flanged components such as pumps, heat exchangers and expansion vessels. No additional accessories are required for standard installation, but it is important to verify that the flanges and bolts used are compatible with the valve's pressure and temperature ratings. The valve is not suitable for use with steam or oily media due to the EPDM sealing material, which is incompatible with hydrocarbons and oils.Technical background for designers The WAFER J9 operates as a shut-off valve by rotating the disc to either allow or block the flow of media. The stainless steel disc provides durability and resistance to corrosion, while the EPDM sealing material ensures a tight seal against the valve seat. The body material, ductile cast iron GJS 400-15, offers high tensile strength and impact resistance, making it suitable for use in heating and water systems. The valve is designed to integrate into systems operating within the temperature range of -10°C to +120°C. The service life and efficiency of the valve depend on the quality of the installation, the alignment of the flanges, and the compatibility of the media with the sealing material.Service and operation The WAFER J9 requires minimal maintenance due to its simple design and robust materials. Regular checks should be performed to ensure that the flange bolts are tightened to the correct torque and that there is no leakage around the sealing area. If the valve is used in a system with fluctuating pressure or temperature, it is important to monitor the condition of the EPDM sealing material for signs of degradation. No specific service intervals are provided, but the valve should be inspected during routine system maintenance.Frequently asked questions

Can the WAFER J9 be connected to PN 6 flanges?
Yes, the valve is compatible with PN 6 flanges according to EN 1092-1 standards, provided the flange faces are clean and parallel.

Is the EPDM sealing material suitable for use with hot water?
Yes, the EPDM material is suitable for temperatures up to +120°C, making it appropriate for hot water and heating applications.

Can the WAFER J9 be used in steam systems?
No, the valve is not suitable for steam or media containing oils or hydrocarbons, as the EPDM sealing material can degrade under these conditions.

What is the maximum operating pressure of the WAFER J9?
The valve has a pressure rating of PN 16, meaning it can handle a maximum working pressure of 16 bar under normal operating conditions.