锻钢立式止回阀

产品说明：

       H42H锻钢立式止回阀主要作用是防止介质倒流，是一种依靠介质压力开启和关闭的自动阀门。主要适用于城市、工业及高层建筑给水、排水管网上。由于对夹式止回阀的结构长度比一般法兰式止回阀短，对有安装空间限制的场所比较适用。对夹式止回阀具有结构长度短，体积小重量轻，阀瓣关闭快速，水锤压力小，流道通畅，流体阻力小，水平管道或垂直管道均可使用，安装方便，动作灵敏,密封性能好，阀瓣行程短、关阀冲击力小，简单紧凑、造型美观，使用寿命长、稳定性高，防止介质倒流，自动控制等优点。

产品用途：

       对夹式止回阀适用于公称压力PN1.0MPa～42.0MPa、Class150～2500；公称通径DN15～1200mm、NPS1/2～48；工作温度196～540℃的各种管路上，用于防止介质倒流。通过选用不同的材质，可适用于水、 蒸汽，油品、硝酸、醋酸、强氧化性介质用尿素等多种介质。

主要外形尺寸：

锻钢立式止回阀

锻钢立式止回阀是指阀体采用锻造成型（Forged Body），且设计为垂直方向安装的止回阀。其核心功能是自动允许流体自下向上流动，并依靠阀瓣自重和介质回流力快速关闭，严格防止介质反向倒流，是石油、化工、电力等行业高压、高温管路上的关键安全设备。

该阀门因其阀体为锻钢材质，具有更高的机械强度和承压能力，通常符合ASME B16.34等标准的高压力等级要求（如Class 800, Class 1500, Class 2500）。其“立式”特性要求必须垂直安装于水平管道上，确保阀瓣能依靠重力自动复位关闭。内部结构通常为升降式（Lift Type），阀瓣沿阀体通道轴线做垂直上下运动，密封稳定，流阻较小。

锻钢立式止回阀主要特点：

高强度与高承压： 锻钢阀体晶粒致密，机械性能远优于铸钢，能承受超高压、高温及压力波动。

锻钢立式止回阀垂直安装： 必须让阀瓣轴线与水平面垂直，以确保阀瓣能稳定自重回落，实现快速关闭。

锻钢立式止回阀密封性能好： 金属密封面通常进行硬化处理（如堆焊司太立合金），在高压差下仍能严密密封。

锻钢立式止回阀流道顺畅与低流阻： 直通式流道，流线型设计，压力损失小。

安全稳定： 无外部操纵机构，自动启闭，是防止介质逆流的关键自动安全装置。

锻钢立式止回阀耐高温： 全金属结构，无可非金属密封件，适用于高温工况。

锻钢立式止回阀典型应用：

石油天然气开采：井口装置、高压采油树。

锻钢立式止回阀炼油与化工：加氢装置、高压反应器出口、高压换热器进出口。

锻钢立式止回阀能源电力：电站锅炉给水系统、高压蒸汽系统。

高压注水系统：油田注水泵出口。

各类苛刻工况下的高压、超高压管道。

Product Overview of Forged Steel Vertical Lift Check Valves

Product Overview:

A Forged Steel Vertical Lift Check Valve refers to a check valve with a forged body that is designed for vertical installation. Its core function is to automatically allow fluid to flow  bottom to top  rely on the disc's weight  reverse flow force to close quickly, strictly preventing reverse flow of media. It is a critical safety device in high-pressure  high-temperature pipelines in industries such as oil, chemical,  power.

The forged steel body provides higher mechanical strength  pressure-bearing capacity, typically meeting the requirements of high-pressure classes (e.g., Class 800, Class 1500, Class 2500) per standards like ASME B16.34. Its "vertical" characteristic mandates that it must be installed vertically on a horizontal pipeline to ensure the disc can reset  close automatically by gravity. The internal design is usually the lift type,  the disc moves vertically along the axis of the valve body passage, providing reliable sealing  relatively low flow resistance.

Key Features:

High Strength & Pressure Capacity: The forged steel body has a dense grain structure  superior mechanical properties compared to cast steel, capable of withstanding ultra-high pressure, high temperature,  pressure fluctuations.

Vertical Installation: Must be installed with the disc axis perpendicular to the horizontal plane to ensure the disc can reliably return by gravity for quick closing.

Excellent Sealing Performance: The metal sealing surfaces are often hardened (e.g., Stellite overlay), ensuring tight sealing even under high pressure differentials.

Smooth Flow Path & Low Resistance: Straight-through flow path with a streamlined design results in low pressure drop.

Safe & Reliable: No external actuation mechanism, operates automatically, serving as a key automatic safety device to prevent media backflow.

High-Temperature Resistance: All-metal construction with no non-metallic seals, suitable for high-temperature services.

Typical Applications:

Oil & Gas Production: Wellhead equipment, high-pressure Christmas trees.

Refining & Chemical: Hydrogenation units, outlets of high-pressure reactors, inlets/outlets of high-pressure heat exchangers.

Power Generation: Boiler feedwater systems  high-pressure steam systems in power plants.

High-Pressure Water Injection Systems: Outlet of oilfield water injection pumps.

High-pressure  ultra-high-pressure pipelines in various severe service conditions.

关键术语翻译 (Key Terminology Translation):

锻钢立式止回阀: Forged Steel Vertical Lift Check Valve

锻造成型: Forged Body

垂直安装: Vertical Installation

升降式: Lift Type

阀瓣: Disc ( Lift Disc)

自重: Weight / Gravity

流阻: Flow Resistance

压力等级: Pressure Class

司太立合金: Stellite

苛刻工况: Severe Service

超高压: Ultra-High Pressure

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