JIS Stop-Check Valve
manufacturer: Shanghai MeiYan Yi Pump & Valve Co., Ltd.
Eml: sales@1bengfa.com
Tel: +86 (21) 5640 2009
Mob: +86 138 1691 3072（WeChat Same Account）
product drawing
JIS Stop-Check Valve
Overview
JIS Check Valves are automatic valves strictly designed, manufactured, and tested in accordance with the Japanese Industrial Standards (JIS). They are primarily used to prevent backflow of media in pipelines. The valve bodies are typically made of cast iron, cast steel, or stainless steel, with structural types including swing, lift, and dual-plate designs. Their operating principle relies on the kinetic energy of forward-flowing media to open the disc. When the media flow stops or reverses, the disc automatically closes under the force of its own weight, spring action, or reverse media pressure. These valves fully comply with standards such as JIS B2003 in terms of dimensions, pressure ratings, flange connections, and material requirements. They are specifically designed for use in marine applications, Japanese industrial equipment, Japan-related engineering projects, and supporting export projects, ensuring full compatibility and high reliability with JIS-compliant piping systems.
Features
1. Strict JIS Compliance: The entire process of design, manufacturing, and inspection follows JIS standards (such as JIS B2003, JIS B2071, etc.), ensuring seamless compatibility with JIS piping systems in terms of dimensions, pressure ratings, and flange connections (JIS B2220).
2. Reliable Sealing and Automatic Operation: Utilizes precisely matched disc and seat sealing pairs to ensure quick and tight closure. Swing-type designs offer low pressure drop, while lift-type designs provide superior sealing performance, effectively preventing backflow of various media.
3. Versatile Structural Adaptability: Available in swing-type (suitable for horizontal or vertical installation), lift-type (horizontal installation), and wafer-type dual-plate designs to accommodate different installation spaces, media characteristics, and pressure requirements.
4. Safe, Durable, and Easy Maintenance: Robust construction withstands certain water hammer impacts. Key components are wear-resistant and corrosion-resistant, allowing easy inspection or replacement of internal parts such as discs and seals during maintenance.
5. Standardized and Interchangeable: Strict adherence to JIS standards ensures excellent interchangeability, facilitating procurement, installation, and spare parts replacement within JIS-compliant systems—particularly ideal for Japanese-funded projects and equipment integration.
Dimensions & constructral diagram
JIS Stop-Check Valve constructral diagram
Material of main parts
| NO. | Name | Material |
|---|---|---|
| 1 | Body | WCB, Stainless Steel |
| 2 | Disc | WCB, Stainless Steel |
| 3 | Stem | WCB, Stainless Steel |
| 4 | Packing | PTFE |
Performance Specification
| Item | Value | Unit |
|---|---|---|
| Nominal Pressure | 10K/20K | Mpa |
| Shell Test Pressure | 2.4/6 | Mpa |
| Seal Test Pressure | 1.76/4.4 | Mpa |
| Suitable Temperature | ≤425 | ℃ |
Specification and dimensions
| NPS | 50A | 65A | 80A | 100A | 125A | 150A | 200A | 250A | 300A |
|---|---|---|---|---|---|---|---|---|---|
| L (mm) | 203 | 216 | 241 | 292 | 330 | 356 | 495 | 622 | 698 |
| H (mm) | 112 | 130 | 147 | 177 | 189 | 209 | 257 | 296 | 343 |
