产品说明：

       H42W立式止回阀正常处于关闭状态，由于管线中进口端介质的压力作用，而克服弹簧阻力使阀门开启。当进口端介质压力低于出口端时，弹簧将阀芯推向阀座而使阀门关闭，阻止介质逆流，故起止回作用。 
       本阀门由于采用弹簧支撑阀芯，故采用立式安装或卧式装均可。

       产品名称：旋启式止回阀,升降式止回阀
       产品型号：H44，H41
       连接方式：螺纹 卡套 焊接 法兰 
       压力等级：1.0MPa~ 16.0MPa
       产品规格：DN10 ~ 350mm
       产品材质：WCB碳钢,不锈钢，铬钼钢等等
       适用温度：≤425 ℃
       适用介质：水、石油、天然气等

主要外形尺寸和连接尺寸：

H42W立式止回阀

H42W立式止回阀是一种法兰连接的升降立式止回阀。它属于自动阀门，其作用是防止管道中的介质倒流，确保介质向一个方向流动，以避免发生事故。该产品严格按GB12235标准设计制造，阀瓣沿着中心定位作升降运动。它广泛应用于石油、化工、制药、电力行业等各种工况的管路上。

H42W立式止回阀主要特点

· 结构紧凑：具有结构简单，零部件少，重量轻等特点。

· 动作稳定：衬套采用耐磨性能好、摩擦系数小的特殊材料制作，动作灵活可信，密封性能优良。

· 安装便利：主要用于垂直管道安装。用于立式安装时，通常可不设弹簧，利用阀瓣自身的重量及流体回流的压力起止回作用。

H42W立式止回阀主要技术参数

主要性能规范

下表汇总了该阀门的主要性能规范：

型号 Model 公称压力 Nominal Pressure PN(MPa) 试验压力 Test Pressure Ps (MPa) 适用温度 Applicable Temp. (℃) 适用介质 Applicable Media

  壳体 Shell Test 密封 Seal Test

H42W-16C 1.6 2.4 1.76 ≤425

H42W-16P 1.6 2.4 1.76 ≤200

H42W-25P 2.5 3.75 2.75 ≤200

H42W-25R 2.5 3.75 2.75 ≤200

H42W-40P 4.0 6.0 4.4 ≤200

H42W-40R 4.0 6.0 4.4 ≤200

H42Y-40 4.0 6.0 4.4 ≤425

H42W立式止回阀主要零件材料

下表为主要零件材质信息：

零件名称 Part Name H42W-16C H42W-16P / 25P / 40P H42W-25R / 40R H42Y-40

阀体、阀瓣 Body, Disc 碳钢 Carbon Steel 铬镍钛不锈钢 Stainless Steel (Cr-Ni-Ti) 铬镍钼钛不锈钢 Stainless Steel (Cr-Ni-Mo-Ti) 碳钢 Carbon Steel

导向阀 Guide 碳钢 Carbon Steel 铬镍钛不锈钢 Stainless Steel (Cr-Ni-Ti) 铬镍钼钛不锈钢 Stainless Steel (Cr-Ni-Mo-Ti) 碳钢 Carbon Steel

H42W立式止回阀密封面 Sealing Surface 碳钢 Carbon Steel 铬镍钛不锈钢 Stainless Steel (Cr-Ni-Ti) 铬镍钼钛不锈钢 Stainless Steel (Cr-Ni-Mo-Ti) 堆焊硬质合金 Hard-faced Alloy

H42W立式止回阀主要外形连接尺寸

以下是部分常见通径的尺寸参考（单位：mm）：

公称通径 Nominal Diameter DN L D D1 D2 b f Z-Φd

25 115 115 85 65 16 2 4-Φ14

32 120 135 100 78 18 3 4-Φ18

40 130 145 110 85 18 3 4-Φ18

50 140 160 125 100 20 3 4-Φ18

65 160 180 145 120 22 3 8-Φ18

80 185 195 160 135 22 3 8-Φ18

100 210 230 190 160 24 3 8-Φ23

125 250 270 220 168 28 3 8-Φ25

150 300 300 250 218 30 3 8-Φ25

200 380 360 310 278 34 3 12-Φ25

Product Overview: H42W Vertical Lift Check Valve

Product Definition & Application

The H42W Vertical Lift Check Valve is aflanged vertical lift check valve . It is an automatic valve designed to prevent the backflow of medium in pipeline systems, ensuring one-way flow to avoid accidents . This product is strictly designed manufactured according to the GB12235 standard , with the disc moving up down along the central guide . It is widely used in pipelines across industries such as petroleum, chemical, pharmaceutical, power generation .

Key Features

· Compact Structure: It features a simple structure, few parts, light weight .

· Reliable Operation: The bushing is made of special material with good wear resistance a low friction coefficient, ensuring flexible reliable operation excellent sealing performance .

· Easy Installation: It is primarily designed for installation in vertical pipelines . When installed vertically, it generally operates without a spring, relying on the weight of the disc itself the pressure of the reverse fluid to perform the check function .

Main Technical Parameters

Main Performance Specifications

The table below summarizes the main performance specifications:

Model Nominal Pressure PN(MPa) Test Pressure Ps (MPa) Applicable Temp. (℃) Applicable Media

  Shell Test Seal Test

H42W-16C 1.6 2.4 1.76 ≤425

H42W-16P 1.6 2.4 1.76 ≤200

H42W-25P 2.5 3.75 2.75 ≤200

H42W-25R 2.5 3.75 2.75 ≤200

H42W-40P 4.0 6.0 4.4 ≤200

H42W-40R 4.0 6.0 4.4 ≤200

H42Y-40 4.0 6.0 4.4 ≤425

Main Part Materials

The following table provides information on the main part materials:

Part Name H42W-16C H42W-16P / 25P / 40P H42W-25R / 40R H42Y-40

Body, Disc Carbon Steel Stainless Steel (Cr-Ni-Ti) Stainless Steel (Cr-Ni-Mo-Ti) Carbon Steel

Guide Carbon Steel Stainless Steel (Cr-Ni-Ti) Stainless Steel (Cr-Ni-Mo-Ti) Carbon Steel

Sealing Surface Carbon Steel Stainless Steel (Cr-Ni-Ti) Stainless Steel (Cr-Ni-Mo-Ti) Hard-faced Alloy

Main Face-to-Face & Connection Dimensions

The following are dimensions for some common nominal diameters(Unit: mm) :

Nominal Diameter DN L D D1 D2 b f Z-Φd

25 115 115 85 65 16 2 4-Φ14

32 120 135 100 78 18 3 4-Φ18

40 130 145 110 85 18 3 4-Φ18

50 140 160 125 100 20 3 4-Φ18

65 160 180 145 120 22 3 8-Φ18

80 185 195 160 135 22 3 8-Φ18

100 210 230 190 160 24 3 8-Φ23

125 250 270 220 168 28 3 8-Φ25

150 300 300 250 218 30 3 8-Φ25

200 380 360 310 278 34 3 12-Φ25

Note: Specific dimensions may vary by manufacturer. Please refer to official drawings catalogs for precise information.