WAFER J9 - Nickel Cast Iron Disc; EPDM - DN 80; L=46mm BRA.J9.100

Product detailed description

This wafer-type butterfly valve is commonly used in heating, ventilation, air conditioning (HVAC) systems, and water distribution networks. Installers and technicians encounter these valves in applications where compact size and reliable sealing are required. The design allows for quick shut-off and is typically installed between flanged connections in pipelines carrying heated or chilled water. The valve is particularly suited for systems that require moderate pressure resistance and temperature stability over a wide range.

The WAFER J9 model is ideal for medium-pressure environments and is often found in residential and commercial buildings, industrial facilities, and infrastructure projects. It is frequently used in closed-loop systems, such as those found in underfloor heating, domestic hot water circuits, and central heating systems. The valve’s low profile makes it suitable for tight spaces and retrofitting into existing piping systems.

Technical parameters

Material	Body - Cast iron GJS 400-15
Nominal Diameter	DN 80
Nominal Pressure	PN 16/ PN 10
Weight	3.1 kg
Code	J9.100.080
Brand	IVAR

The valve is rated for a maximum pressure of 16 bar and operates within a temperature range of -10°C to +120°C. The body material is grey iron (GJS 400-15), which provides good mechanical strength and corrosion resistance in non-aggressive media. The sealing disc is made of nickel-plated cast iron, and the sealing material is EPDM, suitable for water and air applications. These parameters are critical for selecting the correct valve size and ensuring compatibility with the system’s operating conditions.

Installation and connection

The WAFER J9 is installed between two flanged pipe sections. It requires standard flange connections according to EN 1092 standards for PN 16, PN 10, or PN 6. The valve must be mounted in a horizontal or vertical position, ensuring that the flow direction does not interfere with the sealing performance. The operating lever should be aligned for easy access during operation. During installation, ensure that the flanges are clean and free of debris to prevent misalignment and leakage. Check that the bolt holes align correctly and that the bolts are tightened evenly. A common mistake is over-tightening, which can damage the EPDM sealing material and lead to early failure. Always verify the valve’s position in the system to avoid stress on the body caused by thermal expansion or pipe movement.

Compatibility and accessories

This valve is compatible with standard flanged pipe systems using PN 16, PN 10, or PN 6 flanges. It is intended for use with water, air, and non-corrosive fluids. No additional accessories are required for basic operation, but an actuator may be added for remote control. Ensure that the system’s media is compatible with EPDM sealing material—avoid use with oils, hydrocarbons, or solvents.

Technical background for designers

The WAFER J9 operates via a rotating disc that either fully opens or closes the flow path. The disc is positioned centrally and rotates on a shaft to control fluid passage. The EPDM sealing material ensures a tight closure when the valve is in the closed position. The body material, grey iron, offers good mechanical properties and is suitable for long-term use in non-aggressive environments. The valve integrates into the system through standard flanged connections, and its compact design reduces space requirements compared to other types of valves. The service life and efficiency depend on proper installation, regular inspection, and avoiding exposure to incompatible media. The temperature range and pressure rating are key factors in determining the valve’s suitability for a specific application.

Service and operation

Routine checks should include visual inspection for signs of wear, corrosion, or leakage around the flange connections. Ensure that the operating lever moves freely and that the valve opens and closes without resistance. If the system contains suspended particles, consider installing a filter upstream to prevent abrasive damage to the sealing surface. No scheduled maintenance intervals are specified in the technical documentation. However, if the valve is used in a system with frequent cycling or high particulate content, more frequent inspections may be necessary. In case of suspected internal damage or reduced sealing performance, disassembly and inspection are recommended.

Frequently asked questions

Can the WAFER J9 be used with steam?
No, the valve is not suitable for steam applications due to the limitations of the EPDM sealing material and the body’s temperature rating.

Is the WAFER J9 compatible with hydrocarbon-based liquids?
No, the EPDM sealing material is not resistant to hydrocarbons or oil-based media, which can cause swelling and degradation of the seal.

What is the maximum allowable temperature for the WAFER J9?
The valve is rated for continuous operation up to +120°C and down to -10°C, as specified in the technical data.

Can the WAFER J9 be used in a vertical installation?
Yes, the valve can be installed vertically provided that the flow direction and system conditions do not cause excessive stress on the body or sealing components.