A JIS non-rising stem gate valve is a type of gate valve that is designed in accordance with the Japanese Industrial Standards (JIS). The non-rising stem feature refers to the valve stem's design, where the stem does not move up or down as the valve is opened or closed.

Here are some key features and considerations regarding JIS non-rising stem gate valves:

1. Design: JIS non-rising stem gate valves have a compact design, making them suitable for applications with limited space. The non-rising stem design ensures that the valve's height remains constant, regardless of the valve's position (open or closed), which can be advantageous in certain installations.

2. Stem-Seat Connection: The stem of a non-rising stem gate valve is connected directly to the gate or disc that controls the flow. As the valve is opened or closed, the gate or disc moves perpendicular to the flow direction, allowing for effective flow control.

3. Flange End Connection: JIS non-rising stem gate valves typically have flanged ends, which allow for easy installation and connection to pipes or other equipment. The flanges are designed according to the JIS standards, ensuring compatibility with other JIS-compliant components.

4. Pressure and Temperature Rating: JIS non-rising stem gate valves come in various pressure and temperature ratings, allowing for selection based on the specific application requirements. It is important to ensure that the chosen valve can withstand the expected pressure and temperature conditions.

5. Applications: These gate valves are commonly used in industries such as water treatment, wastewater management, chemical plants, and general industrial applications where reliable flow control is needed.