SJ400X流量控制阀

 

一、结构及用途 Structure and purpose

      该阀是采用高精度先导式控制流量，适用于控制流量和压力管路，保持预定流量不变，将过大流量限制在一个预定值，并将上游高压适当减低，即使主阀上游的压力变化也不会影响下游的流量，该阀一改常规节流阀及使用孔扳或纯机械地减少流域面积的原理，利用相关导阀，最大限度地减少能量在节流过程中的损失，该阀控制灵敏、安全可靠、调试简单、使用寿命长。

This valve uses a high accuracy pilot operated flow control and is suitable for flow and pressure pipeline control to keep the preset flow unchanged.1imit an extra-big flow at a preset value and properly lower the high pressure on the upstream．the flow at the downstream will not be affected even if the pres-sure of the main valve at the upstream varies.1t changes the principle for a throttle valve to reduce the basin area purely mechanically or by way of using orifices and utilizes the related pilot valve to reduce the energy loss during throttling to the utmost extent and features sensitive control,safety,reliability,easy debugging and long duration.

四、主要外形及连接尺寸 Schematic diagram of installation

公称通径 DN(mm)		20	25	32	40	50	65	80	100	125	150	200	250	300	350	400	450	500
L		180	180	180	203	203	216	241	292	330	356	495	622	698	787	914	978	978
PN10	D	105	115	135	145	160	180	195	215	245	280	335	390	440	500	565	615	670
	D1	75	85	100	110	125	145	160	180	210	240	295	350	400	460	515	565	620
PN16	D	105	115	135	145	160	180	195	215	245	280	335	405	460	520	580	640	705
	D1	75	85	100	110	125	145	160	180	210	240	295	355	410	470	525	585	650
PN25	D	105	110	135	145	160	180	195	230	270	300	360	425	485	550	610	660	730
	D1	75	85	100	110	125	145	160	190	220	250	310	370	430	490	550	600	660
H		342	342	342	395	395	405	430	510	560	585	675	730	760	840	910	1030	1135
H1		247	247	247	278	278	298	313	350	365	420	450	470	490	526	570	610	665

注：安装示意图中弹性座封闸阀或蝶阀任选，建议≥DN350选蝶阀。

Note：Either elastic seat ring sealed gate valve or butterfly valve can be selected in the schematic diagram of installation.Recomended to select the butterfly valve in case of≥DN350