结构特点
a compact forged body for automatic backflow protection on high-integrity lines

最终尺寸、材质、压力等级及随附文件以确认的配置为准。
止回阀 / LIANGGU
Forged Steel High Pressure Check Valve
采用紧凑锻造阀体,为高可靠性管路提供自动防倒流功能。 项目询价时,请提供口径、压力等级、材质、阀座及密封形式、连接方式和数量。最终适用性以审核确认的技术规格为准。
产品详情
a compact forged body for automatic backflow protection on high-integrity lines
forward differential pressure opens the closure element; falling or reversing flow returns it toward the seat; closing behavior depends on line velocity, orientation, inertia, spring force, and the system transient; verify trim grades and end connection
refinery high-pressure branches, steam services, chemical injection, and power-plant auxiliaries
forging and trim grades, end connection, cracking pressure, closure type, NDE scope, and traceability
规格审查
厂家列出的选项仍须根据所选结构和使用工况确认,并非适用于所有配置的固定规格。
| 尺寸/DN 或 NPS | 特定于项目 - 包含在您的 RFQ 中 |
|---|---|
| 压力等级 | 特定于项目 - 包含在您的 RFQ 中 |
| 常见可选材质 | 厂家列示选项Forged carbon, low-temperature, stainless, or alloy steel grades selected from the pressure-temperature envelope, corrosion review, and required heat treatment |
| 端部连接形式及标准 | 厂家列示选项Butt-welded, socket-welded, threaded, or flanged ends only within the selected product design and piping-class scope |
| 驱动方式及附件 | 厂家列示选项Self-acting check function; any assisted-closure or damping system must be confirmed for the selected design and project duty. |
| 设计标准 | 厂家列示选项API 602 or API 594 may apply depending on size and construction; pipeline designs may instead invoke API 6D or ISO 14313 within scope |
| 交货时间和文件 | 在书面报价中确认 |
所列材质为常见选项,并非全部可选范围。请提供所需牌号及使用工况,以便评估适用性、制造可行性和供应情况。
目录信息支持查询。批准的技术文件定义了最终供货。