Overview

The JIS standard stop valve is a cast steel stop valve strictly designed and manufactured in accordance with Japanese Industrial Standards (JIS). It uses a handwheel or an electric device to drive the stem and disc in a vertical lifting motion along the centerline of the seat, achieving reliable opening and closing of the medium in the pipeline. The core of its design lies in the valve body, which is precision-cast using SCPH series carbon steel, SCS series stainless steel, or special alloys as specified in JIS G5151. This results in a compact structure, good rigidity, and reliable sealing. The valve seat sealing surface typically features a flat or conical design, with stainless steel or hard alloy overlay welding. Through precision grinding, a reliable metal-to-metal seal is achieved. The valve uses a flanged connection conforming to JIS B2220, fastened directly to the pipeline system flanges with bolts, offering high connection strength, reliable sealing, and convenient assembly and disassembly. The handwheel drives the stem, converting rotational force into the linear motion of the disc for smooth and reliable opening and closing control. This valve is specifically designed for pipeline systems handling steam, oil, water, and mildly corrosive media at operating temperatures ≤425°C. It is widely used in industrial pipelines requiring fluid shut-off or connection, such as in petrochemical, power generation, metallurgy, heating, and water supply & drainage industries. It is particularly suitable for JIS standard pipeline conditions with nominal pressures of 10K~20K and diameters DN50~DN300.

JIS Standard Stop Valve Product Image

Features

1、Strict Compliance with JIS Standards, Adapted for the Japanese Market: The product is designed and manufactured in strict accordance with relevant Japanese Industrial Standards, including JIS B2001 (Valve Terminology), JIS B2002 (General Requirements for Valve Materials and Construction), and JIS B2071 (Inspection Standards for Steel Valves). It is fully compatible with the industrial markets of Japan and Southeast Asia that adopt the JIS standard system.

2、Reliable Materials for Diverse Operating Conditions: The body material utilizes SCPH series carbon steel castings (e.g., SCPH1, SCPH2) and SCS series stainless steel castings (e.g., SCS13, SCS14) as specified in JIS G5151. Selection depends on the specific medium, allowing for widespread use in pipelines carrying steam, oil, water, and mildly corrosive media.

3、Excellent Sealing and Reliable Shut-off: The sealing surfaces of the disc and seat feature a flat or conical design. They are overlaid with stainless steel or hard alloy and precision ground/lapped to achieve a reliable metal-to-metal seal. During opening and closing, there is no relative sliding motion on the sealing surfaces, resulting in minimal wear, long service life, and positive pipeline shut-off.

4、Smooth Flow Path, Low Flow Resistance: The body is manufactured using forging or precision casting processes with a well-designed internal flow path, ensuring smooth media passage. Although its face-to-face dimension is slightly longer than angle-type stop valves, it still offers good flow capacity and relatively low pressure loss compared to other stop valve types.

5、Connection Compliant with JIS Flange Standards: It utilizes a flanged connection with flange dimensions conforming to JIS B2220 standards (e.g., pressure ratings 5K, 10K, 16K, 20K). Connection is made directly to pipeline flanges using bolts, ensuring reliable sealing and easy installation/dismantling. It is widely used in various industrial pipeline systems employing JIS flanges.

6、Flexible Operation and Wide Application: Depending on service conditions, it can be equipped with manual (handwheel), spur gear, or electric actuators for local or remote control. Suitable for steam, oil, water, and mildly corrosive media at operating temperatures ≤425°C, it is extensively applied in industrial fields such as petrochemicals, power generation, metallurgy, heating, and water supply & drainage.