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該閥用于水泵出口控制水泵的實際工作揚程 ,以限制水泵的工作流量,限制水泵電機(jī)負(fù)載,使水泵在較高效率狀態(tài)下工作,防止水泵電機(jī)在低揚程、大流量、低效率時發(fā)生過載現(xiàn)象，防止超額定電流燒壞水泵電機(jī)現(xiàn)象發(fā)生，同時起到一定節(jié)能效果。安裝、維護(hù)、調(diào)試、檢查方便，使用壽命長，同時具有緩閉清聲止回閥功能。

This valve is used at a water pump＇s outlet to control the real working head of the pump so as to limit the working flow and the motor＇s load of it，make the pump working in a higher efficiency, prevent the motor from being overloaded in case if a low head，a big flow or a low efficiency and from being burnt due to an extra-rated cu r rent，with a certain energy saving effect Easy installation，maintenance，adjustment and check，long duration and of the function to be a slowly closed silencing check valve.

主要外形及連接尺寸 Schematic diagram of installation

公稱通徑 DN(mm)		20	25	32	40	50	65	80	100	125	150	200	250	300	350	400	450	500	600	700	800
L		180	180	180	203	203	216	241	292	330	356	495	622	698	787	914	978	978	1295	1448	1956
PN10	D	105	115	135	145	160	180	195	215	245	280	335	390	440	500	565	615	670	780	895	1010
PN10	D1	75	85	100	110	125	145	160	180	210	240	295	350	400	460	515	565	620	725	840	950
PN16	D	105	115	135	145	160	180	195	215	245	280	335	405	460	520	580	640	705	840	910	1020
PN16	D1	75	85	100	110	125	145	160	180	210	240	295	355	410	470	525	585	650	770	840	950
PN25	D	105	110	135	145	160	180	195	230	270	300	360	425	485	550	610	660	730	840	955	1070
PN25	D1	75	85	100	110	125	145	160	190	220	250	310	370	480	490	550	600	660	770	875	990
H		172	172	172	265	265	310	350	460	520	570	695	780	905	1025	1080	1030	1135	1270	1460	1640
H1		106	106	106	210	210	215	245	305	365	415	510	560	658	696	735	610	665	725	865	925

注：安裝示意圖中彈性座封閘閥或蝶閥任選，建議≥ DN350選蝶閥。
Note:Either elastic seat ring sealed gate valve or butterfly valve car be selected in the schematic diagram of installation.Recommended to select the butterfly valve un case of ≥ DN350

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