产品介绍：
H44H-16C/H44H-25/H44H-40/H44H-64/H44H-100法兰旋启式止回阀又称单向阀或逆止阀，其作用是防止管路中的介质倒流。水泵吸水关的底阀也属于止回阀类。启闭件靠介质流动和力量自行开启或关闭，以防止介质倒流的阀门叫止回阀。止回阀属于自动阀类，主要用于介质单向流动的管道上，只允许介质向一个方向流动，以防止发生事故。止回阀按结构划分，可分为升降式止回阀、旋启式止回阀和蝶式止回阀三种。升降式止回阀可分为立式和卧式两种。旋启式止回阀分为单瓣式、双瓣式和多瓣式三种。蝶式止回阀为直通式、以上几种止回阀在连接形式上可分为螺纹连接、法兰连接和焊接三种。
主要零件材料：
零件名称材料牌名
阀体WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
阀盖WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
阀瓣WCBZGCr5MoZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti
销轴2Crl32Crl31Cr18Ni9Ti1Cr18Ni12MO2Ti
垫片石墨缠绕垫片石墨缠绕垫片聚四氟乙稀缠绕垫片聚四氟乙稀缠绕垫片
型号性能规范：
公称压力
PN（MPa）壳体材料
试验压力（Mpa）
WCBZGCr5Mo（C5）ZG1Cr18Ni9TiZG1Cr18Ni12Mo2Ti强度试验液体密封气体密封
1.6H44H-16CH44Y-16IH44W-16PH44W-16R2.41.8
2.5H44H-25H44Y-25IH44W-25PH44W-25R3.82.8
4.0H44H-40H44Y-40IH44W-40PH44W-40R6.04.4
6.4H44H-64H44Y-64IH44W-64PH44W-64R9.67.1
10.0H44H-100H44Y-100IH44W-100PH44W-100R15.011.0
适用温度-29-425℃
≤550℃
-40-200℃
-40-200℃
超出温度范围，请订货时注明
适用介质水蒸气、油品等水蒸气、油品等硝酸等醋酸等
连接尺寸和外形尺寸：
型号公称通径尺寸（mm）
LDD1D2D6bZ-фdD0H
H44H-16C4020014511085-
164-ф18160150
50230160125100-
164-ф18185160
65290180145120-
184-ф18215175
80310195160135-
208-ф18230180
100350215180155-
208-ф18260210
125400245210185-
228-ф18320235
150480280240210-
248-ф23350250
200550335295265-
2612-ф23420330
250650405355320-
3012-ф25480380
300750460410375-
3012-ф25520410
3508505204870435-
3416-ф25600490
H44H-254020014511085-
184-ф18160150
50230160125100-
204-ф18185160
65290180145120-
228-ф18215175
80310195160135-
228-ф18235185
100350230190160-
248-ф23270220
125400270220188-
288-ф25340248
150480300250218-
308-ф25375276
200550360310278-
3412-ф25435350
250650425370332-
3612-ф30515410
300750485430390-
406-ф30550430
350850550490448-
4416-ф34620466
H44H-40402001451108576184-ф18-
-
5023016012510088204-ф18185169
型号公称通径尺寸（mm）
LDD1D2D6bZ-фdD0H
H44H-4065290180145120110228-ф18215175
80310195160135121228-ф18235185
100350230190160150248-ф23270220
125400270220188126288-ф25340248
150480300250218204308-ф25375270
2005503751202822603812-ф30450342
2506504453853453134212-ф34525401
300750510450408364464-ф23550423
H44H-645030017513510588268-ф23200177
65340200160130110288-ф23225197
80380210170140121308-ф25250212
100430250200168150328-ф30315248
125500295240202176368-ф34365296
1505503402802402043812-ф34410330
2006504053453002604412-ф41480385
2507754704003523134816-ф41565445
300900530460412364504-ф25600474
H44H-1005030019514511288288-ф25220210
65340220170138110328-ф25240227
80380230180148121348-ф30260235
100430265210172150388-ф34330274
1255003102502101504212-ф34385307
1505503502902502044612-ф34425347
2006504303603122605412-ф41500402
2507755004303823136012-ф41565432