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         您现在的位置:东格阀门 - 产品中心 - API止回阀 销售部电话:021-51698368 销售部传真:021-69519067 业务手机:13918143058
         产品展示

      产品说明:

      API止回阀
      止回阀是能自动阻止流体倒流的阀门。止回阀的阀瓣在流体压力作用下开启,流体从进口侧流向出口侧。当进口侧压力低于出口侧时,阀瓣在流体压差、本身重力等因素作用下自动关闭以防止流体倒流。
      止回阀一般分为升降式、旋启式等几种类型。
      升降式止回阀的结构一般与截止阀相似,其阀瓣沿着通道中心线作升降运动,动作可靠,但流体阻力较大,适用于较小口径的场合。升降式止回阀可分为直通式和立式两种。直通式升降式止回阀一般只能安装在水平管路,而立式升降止回阀一般应安装在垂直管路。
      旋启式止回阀的阀瓣绕转轴作旋转运动。其流体阻力一般小于升降式止回阀,它适用于较大口径的场合。旋启式止回阀根据阀瓣的数目可分为单瓣旋启式、双瓣旋启式及多瓣旋启式三种。单瓣旋启式止回阀一般适用于中等口径的场合。大口径管路选用单瓣旋启式止回阀时,为减少水锤压力,最好采用能减小水锤压力的缓闭止回阀。双瓣旋启式止回阀适用于大中口径管路。对夹双瓣旋启式止回阀结构小、重量轻,是一种发展较快的止回阀;多瓣旋启式止回阀适用于大口径管道路。


      主要零件材料及性能规范

      阀体、阀盖、摇杆

      WCB

      CF8

      CF 8M

      WC6WC9

      阀瓣

      WCBCr13或硬质合金

      CF8堆硬质合金

      CF 8M 堆硬质合金

      WC6WC9堆硬质合金

      阀座

      25Cr13或硬质合金

      304堆硬质合金

      316堆硬质合金

      20Cr1MoV堆硬质合金

      垫片

      软铁、XB450

      聚四氟乙烯

      聚四氟乙烯

      不锈钢+耐酸石棉缠绕垫

      螺栓

      35CrMoA

      35CrMoA

      35CrMoA

      25Cr1Mo1V

      螺母

      45

      45

      45

      35CrMoA

      主要参数

      适用介质

      油品、水、蒸汽

      硝酸类

      醋酸类

      油品、水、蒸汽

      适用温度

      425

      200

      200

      550

       

       

      公称

      通径

      NPS(in)

      压力级Class

      主要结构尺寸(mm)

      阀体

      材料

      简要性能

      D

      L

      H

      ()

      适用介质

      SFH -41C 300C

      11/2"

      300

      156

      241

       

      WCB

      425

      水、油品、蒸气、等

      "

      2"

      "

      165

      267

       

      "

      "

      "

      "

      21/2"

      "

      190

      292

       

      "

      "

      "

      "

      3"

      "

      210

      318

       

      "

      "

      "

      "

      4"

      "

      254

      356

       

      "

      "

      "

      "

      5"

      "

      279

      400

       

      "

      "

      "

      "

      6"

      "

      318

      445

       

      "

      "

      "

      "

      8"

      "

      381

      533

       

      "

      "

      "

      "

      10"

      "

      445

      622

       

      "

      "

      "

      "

      12"

      "

      521

      711

       

      "

      "

      "

      "

      14"

      "

      584

      838

       

      "

      "

      "

      "

      16"

      "

      648

      864

       

      "

      "

      "

      "

      18'

      "

      711

      978

       

      "

      "

      "

      "

      20'

      "

      775

      1016

       

      "

      "

      "

      "

      24"

      "

      914

      1346

       

      "

      "

      "

      SFH -44C 150C

      11/2"

      150

      127

      165

      150

      WCB

      425

      水、油品、蒸气、等

      "

      2"

      "

      152

      203

      170

      "

      "

      "

      "

      21/2"

      "

      178

      216

      180

      "

      "

      "

      "

      3"

      "

      190

      241

      185

      "

      "

      "

      "

      4"

      "

      229

      292

      215

      "

      "

      "

      "

      5"

      "

      254

      330

      240

      "

      "

      "

      "

      6"

      "

      279

      356

      260

      "

      "

      "

      "

      8"

      "

      343

      495

      300

      "

      "

      "

      "

      10"

      "

      406

      622

      350

      "

      "

      "

      "

      12"

      "

      483

      699

      400

      "

      "

      "

      "

      14"

      "

      533

      787

      450

      "

      "

      "

      "

      16"

      "

      597

      864

      480

      "

      "

      "

      "

      18'

      "

      635

      978

      540

      "

      "

      "

      "

      20'

      "

      699

      978

      600

      "

      "

      "

      "

      24"

      "

      813

      1295

      680

      "

      "

      "

      SFH -44C 300C

      11/2"

      300

      156

      241

      160

      WCB

      425

      水、油品、蒸气、等

      "

      2"

      "

      165

      267

      170

      "

      "

      "

      "

      21/2"

      "

      190

      292

      185

      "

      "

      "

      "

      3"

      "

      210

      318

      215

      "

      "

      "

      "

      4"

      "

      254

      356

      235

      "

      "

      "

      "

      5"

      "

      279

      400

      270

      "

      "

      "

      "

      6"

      "

      318

      445

      300

      "

      "

      "

      "

      8"

      "

      381

      533

      340

      "

      "

      "

      "

      10"

      "

      445

      622

      350

      "

      "

      "

      "

      12"

      "

      521

      711

      420

      "

      "

      "

      "

      14"

      "

      584

      838

      480

      "

      "

      "

      "

      16"

      "

      648

      864

      520

      "

      "

      "

      "

      18'

      "

      711

      978

      600

      "

      "

      "

      "

      20'

      "

      775

      1016

      670

      "

      "

      "

      SFH -44C 300C

      24"

      300

      914

      1346

      750

      WCB

      425

      水、油品、蒸气、等

      SFH -44C 600C

      2"

      600

      165

      292

      175

      WCB

      425

      水、油品、蒸气、等

      "

      21/2"

      "

      190

      330

      200

      "

      "

      "

      "

      3"

      "

      210

      356

      230

      "

      "

      "

      "

      4"

      "

      254

      432

      295

      "

      "

      "

      "

      6"

      "

      318

      559

      360

      "

      "

      "

      "

      8"

      "

      381

      660

      400

      "

      "

      "

      "

      10"

      "

      445

      787

      460

      "

      "

      "

      "

      12"

      "

      520

      838

      520

      "

      "

      "

      "

      14"

      "

      585

      889

      560

      "

      "

      "

      "

      16"

      "

      650

      991

      650

      "

      "

      "

      "

      18'

      "

      710

      1092

      730

      "

      "

      "

      "

      20'

      "

      775

      1192

      800

      "

      "

      "

      "

      24"

      "

      915

      1397

      900

      "

      "

      "


      乐赢国际