缓闭式止回阀 300X

产品详情

产品简介：

缓闭式止回阀一般分为隔膜阀和活塞阀两大类，本公司生产的缓闭式止回阀口径在DN500mm以下者采用隔膜型，口径在DN600mm以上者采用活塞型，两者之动作原理类似。缓闭式止回阀具有开启和关闭速度调控和逆止功能，阀门安装能有效控制水泵在启动与停止转动时会自动调节到***开启和关闭的速度。广泛适用于工业给水、高层建筑由水泵直接给水系统中，有效减少水锤及水击现象产生，达到安全关闭效果。Products Introduction:Dashpot check valves are usually divided into diaphragm valves and piston valves two categories, the caliber of the  company’s production bellows DN500 using diaphragm type, and DN600 more in the use of piston type, whichever is the principle of similar moves. Dashpot check valve has the function of opening or cutting the speed control and pawl, it can control the water pump availably when the water pump is opening and stopping, the valve will regulate the speed of opening or closing automatically to the best state. It is widely used in the system whose water is supplied by the water pump, such as the industrial water supply、tall building water supply, effectively reduce the times of the water hammer and water beat, up to the safely effect of the closure. 主要零部件材质：Material of Main Parts:

序号Sequence Number	部件名称Part Name	材质Material
1	阀体Body	灰铸铁Cast Iron
2	轴套Busing	不锈钢Stainless Steel
3	阀座Seat	青铜Bronze
5	密封Seal	EPDM
6	阀板Disc	灰铸铁Cast Iron
7	垫片Flake	EPDM with Nylon
9	螺母Bonnet	灰铸铁Cast Iron
10	弹簧Spring	不锈钢Stainless Steel
11	转轴Stem	不锈钢Stainless Steel

              主要性能参数Main Performance Parameters:隔膜式：DN20-500活塞式：DN600-800

公称压力Nominal Pressure PN（MPa）	1.0	1.6	2.5
法兰连接标准Flange Design Standard	GB/T 17241.6-1998		GB/T9113.1-2000
壳体试验压力Shell Testing Pressure（MPa）	1.5	2.4	3.75
密封试验压力Sealing Testing Pressure（MPa）	1.1	1.76	2.75
***入口压力Max Pressure of Entrance（MPa）	1.0	1.6	2.5
***动作压力Min Pressure of Motion（MPa）	≥0.07
工作温度Working Temperature	0℃~80℃
适用介质Suitable Mediums	水Water

 主要外形尺寸和连接尺寸：Outline Dimensions & Connection Dimensions: 

公称通径Nominal DiameterDN (mm)	L	A	A1	H	H1	F
20	180	282	200	172	106	116
25	180	282	200	172	106	116
32	180	282	200	172	106	116
40	240	320	210	265	210	170
50	240	320	210	265	210	170
65	250	330	215	310	215	180
80	285	350	220	350	245	210
100	360	410	230	460	305	275
125	400	420	245	520	365	310
150	455	430	260	570	415	355
200	585	440	280	695	510	460
250	650	450	300	780	560	500
300	800	460	320	905	658	580
350	860	470	340	1025	696	650
400	960	480	360	1080	735	715
450	970	530	395	1030	610	780
500	1075	580	420	1135	665	830
600	1230	600	445	1270	725	920
700	1650	730	495	1460	865	980
800	1750	830	530	1640	925	1050