Butterfly Valve Series

• Cast Iron Butterfly Valves
• Ductile Iron Butterfly Valves
• Stainless Steel Butterfly Valves
• Triple Offset Butterfly Valves
• AWWA C504 Butterfly Valves
• Large Diameter Butterfly Valves
• Sanitary Butterfly Valves
• Flanged Butterfly Valves
• Lug Butterfly Valves
• Wafer Butterfly Valves
• High Vacuum Butterfly Valves

Product drawing»

Structural drawing»

Electric Speed Control Butterfly Valve

product drawing

The introduction and features of product

As a new generation of speed control butterfly valve, the design of DV942X / H Electric Speed Control Valve has changed the traditional mode of relying on mechanical transmission to complete the disc switches speed change. According to the action features of different position of disc, it carries out a new design from the electric drive control. This series of butterfly valves change the input current frequency of electrical device, and then adjust the rotational speed and output torque, to reach the speed of controling disc switches, and to achieve the two stages shut down of disc quick off and slow off or slow open, quick open two stages. It has the same function with the hydraulic control butterfly valve. DV942X / H Electric speed control butterfly valve is used in the pump outlet position of water, seawater medium pipelines, as a cut-off valve with features of check valve. It is designed to prevent and reduce the media back in the piping system and water hammer impact, and protect the pipeline, especially for the reliable power supply situation of power plants, water plants, etc. The main features are: 1, electric hoist, with functions of an arbitrary speed, check and globe. Easy to operate, safe and reliable. 2, the valve can achieve a continuous actions of slow open, quick open or fast off, slow off, and effectively prevent the back flow of the pump outlet and water hammer. 3, energy-saving drive, which is same with the ordinary butterfly valve, can achieve quick off segment of high-speed and small torque, slow-off segment of low speed and large torque function. 4, When installed in the pump outlet, this valve has a common function of check valve and gate valve, so can one valve on behalf of two valves. And it is also saving installation space and cost of pipelines. 5, flow resistance is small. The flow resistance coefficient of full open does not exceed 0.3, so you can save energy and reduce pipeline operating costs. 6, when an accident happened or a power outage, you can manually control the valve open and close.

Dimensions & constructral diagram

The materials of main parts and standard

part name	materials	remarks
body,disc,gland	HT200, HT250, QT450-10
shaft,pin	2Cr13
body sealing ring	1Cr18Ni9Ti, 2Cr13
disc sealing ring	NBR, 1Cr18Ni9Ti
bearing	SF-1, SF-2	self-lubricating
packing	NBR
design and manufacture：GB12238 flange connection dimensions：GB2555-2526-8 face to face dimensions：GB12221 pressure test：GB/T13927

Main technical parameter

nominal pressure（MPa）			0.25	0.6	1.0
nominal diameter（mm）			1000～2400	800～2400	500～1600
test pressure（MPa）	intensity test		0.375	0.9	1.5
	sealing test		0.275	0.66	1.1
applicable medium			water,seawater
suitable temperature		≤80℃
installation		Vertical, horizontal

The main external and connection dimensions

PN	DN	L	A	H1	H2	DO	B1	B2	B3	B4
0.25MPa	1000	410		817	1303	400	225	709	303	770
	1200	470	1200	812	1529	400	225	709	303	760
	1400	530	1400	1012	1692	400	225	728	303	760
	1600	600	1600	1145	1885	400	275	843	385	778
	1800	670	1800	1315	1824	400	275	879	385	792
	2000	760	2000	1670	2095	400	275	969	450	856
	2200	840	2200	1739	2487	400	430	1103	540	995
	2400	910	2400	1699	2595	400	430	1103	540	995

Note: it can produce DN250-3000(GB12221-89) long series according to customers’ requirements,from DN1200-3000 with bottom foot must be marked.

The main external and connection dimensions

PN	DN	L	A	H1	H2	DO	B1	B2	B3	B4
0.6MPa	800	318		677	1190	500	175	583	230	683
	900	330		745	1245	400	225	709	303	770
	1000	410		817	1303	400	225	709	303	760
	1200	470	1200	912	1529	400	225	728	303	760
	1400	530	1400	1041	1692	400	275	843	385	778
	1600	600	1600	1145	1885	400	275	879	385	792
	1800	670	1800	1346	1924	400	275	969	450	856
	2000	760	2000	1670	2095	400	430	1103	540	995
	2200	840	2200	1739	2487	400	430	1103	540	995
	2400	910	2400	1850	2595	400	430	1103	540	995
1.0 MPa	500	229		548	943	500	145	533	162	610
	600	267		583	985	500	175	583	230	683
	700	292		612	1075	500	175	583	230	683
	800	318		677	1190	400	225	709	303	770
	900	330		745	1245	400	225	709	303	760
	1000	410		817	1303	400	225	728	303	760
	1200	470	1200	948	1529	400	275	843	385	778
	1400	530	1400	1158	1692	400	275	879	385	792
	1600	600	1600	1285	1885	400	275	969	450	856

Note: it can produce DN250-3000(GB12221-89) long series according to customers’ requirements,from DN1200-3000 with bottom foot must be marked.

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