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。
H64对焊旋启式止回阀主要零件材料及性能规范
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主 要 零 部 件
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阀体、阀盖、摇杆
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WCB
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CF8
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CF8M
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WC6、WC9
|
|
阀瓣
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WCB堆Cr13或硬质合金
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CF8堆硬质合金
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CF8M堆硬质合金
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WC6、WC9堆硬质合金
|
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阀座
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25堆Cr13或硬质合金
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304堆硬质合金
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316堆硬质合金
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20Cr1MoV堆硬质合金
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|
垫片
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软铁、XB450
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聚四氟乙烯
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聚四氟乙烯
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不锈钢+耐酸石棉缠绕垫
|
|
螺栓
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35CrMoA
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35CrMoA
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35CrMoA
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25Cr1Mo1V
|
|
螺母
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45
|
45
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45
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35CrMoA
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|
主要参数
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适用介质
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油品、水、蒸汽
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硝酸类
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醋酸类
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油品、水、蒸汽
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|
适用温度
℃
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≤425
|
≤200
|
≤200
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≤550
|
|
型号
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公称
通径
NPS(in)
|
压力级
Class
|
主要结构尺寸(mm)
|
阀体
材料
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性能规范
|
|
D
|
D1
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L
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L1
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H
|
适用温度(℃)
|
适用介质
|
|
H64H-64C150C
|
2"
|
150
|
|
|
203
|
|
170
|
WCB
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≤425
|
水、油品、蒸气等
|
|
"
|
3"
|
"
|
|
|
241
|
|
185
|
"
|
"
|
"
|
|
"
|
4"
|
"
|
|
|
292
|
|
215
|
"
|
"
|
"
|
|
"
|
6"
|
"
|
|
|
356
|
|
260
|
"
|
"
|
"
|
|
"
|
8"
|
"
|
|
|
495
|
|
300
|
"
|
"
|
"
|
|
"
|
10"
|
"
|
|
|
622
|
|
350
|
"
|
"
|
"
|
|
"
|
12"
|
"
|
|
|
699
|
|
400
|
"
|
"
|
"
|
|
"
|
14"
|
"
|
|
|
787
|
|
450
|
"
|
"
|
"
|
|
"
|
16"
|
"
|
|
|
864
|
|
480
|
"
|
"
|
"
|
|
"
|
18"
|
"
|
|
|
978
|
|
540
|
"
|
"
|
"
|
|
"
|
20"
|
"
|
|
|
978
|
|
600
|
"
|
"
|
"
|
|
"
|
24"
|
"
|
|
|
1295
|
|
680
|
"
|
"
|
"
|
|
H64H -64C300C
|
2"
|
300
|
|
|
267
|
|
170
|
WCB
|
≤425
|
水、油品、蒸气等
|
|
"
|
3"
|
"
|
|
|
318
|
|
215
|
"
|
"
|
"
|
|
"
|
4"
|
"
|
|
|
356
|
|
235
|
"
|
"
|
"
|
|
"
|
6"
|
"
|
|
|
445
|
|
300
|
"
|
"
|
"
|
|
"
|
8"
|
"
|
|
|
533
|
|
340
|
"
|
"
|
"
|
|
"
|
10"
|
"
|
|
|
622
|
|
350
|
"
|
"
|
"
|
|
"
|
12"
|
"
|
|
|
711
|
|
420
|
"
|
"
|
"
|
|
"
|
14"
|
"
|
|
|
838
|
|
480
|
"
|
"
|
"
|
|
"
|
16"
|
"
|
|
|
864
|
|
520
|
"
|
"
|
"
|
|
"
|
18"
|
"
|
|
|
978
|
|
600
|
"
|
"
|
"
|
|
"
|
20"
|
"
|
|
|
1016
|
|
670
|
"
|
"
|
"
|
|
"
|
24"
|
"
|
|
|
1346
|
|
750
|
"
|
"
|
"
|
|
H64H -64C600C
|
2"
|
600
|
|
|
292
|
|
175
|
WCB
|
≤425
|
水、油品、蒸气
|
|
"
|
3"
|
"
|
|
|
356
|
|
230
|
"
|
"
|
"
|
|
"
|
4"
|
"
|
|
|
432
|
|
295
|
"
|
"
|
"
|
|
"
|
6"
|
"
|
|
|
559
|
|
360
|
"
|
"
|
"
|
|
"
|
8"
|
"
|
|
|
660
|
|
400
|
"
|
"
|
"
|
|
"
|
10"
|
"
|
|
|
787
|
|
460
|
"
|
"
|
"
|
|
"
|
12"
|
"
|
|
|
838
|
|
520
|
"
|
"
|
"
|
|
"
|
14"
|
"
|
|
|
889
|
|
560
|
"
|
"
|
"
|
|
"
|
16"
|
"
|
|
|
991
|
|
650
|
"
|
"
|
"
|
|
"
|
18"
|
"
|
|
|
1092
|
|
730
|
"
|
"
|
"
|
|
"
|
20"
|
"
|
|
|
1194
|
|
800
|
"
|
"
|
"
|
|
"
|
24"
|
"
|
|
|
1397
|
|
900
|
"
|
"
|
"
|
本公司其它相关止回阀产品系列：
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H41X/W-16P不锈钢消声止回阀 H76H/W对夹双瓣式蝶型止回阀
300X缓闭止回阀 H42X底阀 H12W-16T黄铜丝口止回阀
H12W-16P/R不锈钢内螺纹止回阀 H41W型不锈钢升降式止回阀
H61Y型高压升降式止回阀 H72H对夹式高压止回阀
H42H/W不锈钢法兰立式止回阀 HQ45X型微阻球形止回阀
H11H/H61H锻钢止回阀.锻不锈钢止回阀 HC41T消声止回阀(铁壳铜芯)
H44H/W旋启式止回阀 HQ41X球形止回阀(无磨损球形止回阀)
H42T型(DRVZ)静音止回阀 H74H对夹旋启式止回阀
SH74Ⅰ型对夹薄型止回阀 H41H/W升降式止回阀
HH47X/HH48X/HH49X微阻缓闭蝶型消声止回阀 H42H/W立式止回阀
HH44X微阻缓闭止回阀 H71H/W对夹升降式止回阀
SH74H-Ⅱ型薄型止回阀 H76X对夹蝶型旋启式止回阀
H41X/W全铜消声止回阀 HC44X-10-1橡胶瓣止回阀
SH71W-16T对夹升降式止回阀(全铜) H47X蝶式缓冲止回阀
H12W内螺纹止回阀(丝口立式止回阀) DRVZ型立式静音止回阀
H14H内螺纹旋启式止回阀 H76Y对夹式双蝶板止回阀
H76H对夹式止回阀 HQ41X滑道滚球式止回阀
CVWR对夹式静音止回阀 HQ44X微阻球形止回阀
DHH44X微阻缓闭消声止回阀 CVKR静音式止回阀
HH48X微阻缓闭蝶式止回阀 XL—T(F·S)鸭嘴形柔性止回阀
大象阀门公司订货须知：
一、①H64对焊旋启式止回阀产品名称与型号②H64对焊旋启式止回阀口径③是否带附件以便我们的为您正确选型。
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