D971XThe electric soft seal butterfly valve PN10 ~ PN25 is a kind of pneumatic valve which uses the round butterfly plate which rotates with the valve stem to open and close. The pneumatic valve is mainly used as a block valve, and can also be designed to have the function of regulating or segment valve and regulating. At present, butterfly valve is more and more used in low-pressure large and medium-sized pipes. The butterfly plate of the electric soft seal butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical channel of butterfly valve body, the disc-shaped butterfly plate rotates around the axis, the rotation angle is between 0 ° and 90 ° and the valve is fully open when it is rotated to 90 °.

 

1. The electric soft seal butterfly valve adopts three eccentric structure, which has the sealing function of closing more tightly, and the sealing performance is reliable.
2. Stainless steel and NBR oil resistant rubber are used as sealing materials, which have long service life.
3. The rubber seal ring can be located on the valve body or butterfly plate. It can be used in different media for users to choose.
4. The butterfly plate adopts frame structure with high strength, large flow area and small flow resistance.
5. It can be used in different media as long as the sealing material of sealing valve seat is replaced.
6. The valve has the function of two-way sealing. It is not controlled by the flow direction of medium or affected by the space position. It can be installed in any direction.
7. The valve has unique structure, flexible operation, labor saving and convenience.

D971XMaterials of main parts of electric soft seal butterfly valve PN10 ～ PN25

Part name	Material Science
valve body	Nodular cast steel, cast steel, alloy steel, stainless steel
Disc	Gray cast iron, nodular cast steel, cast steel, stainless steel and special materials
seal ring	All kinds of rubber, polytetrafluoroethylene
	2Cr13、stainless steel
filler	O-ring, flexible graphite

D971XMain external connection dimensions of electric soft seal butterfly valve PN10 ～ PN25（mm)

Nominal diameter(DN)	Main dimensions				Flange size
	L	L1	H	H1	1.0MPa			1.6MPa			2.5MPa
					D	D1	n-Фd	D	D1	n-Фd	D	D1	n-Фd
50	108	43	63	530	165	125	4-18	165	125	4-18	165	125	4-18
65	112	46	70	530	185	145	4-18	185	145	4-18	185	145	8-18
80	114	46	83	565	200	160	4-18	200	160	8-18	200	160	8-18
100	127	52	105	600	220	180	8-18	220	180	8-18	235	190	8-22
125	140	56	115	640	250	210	8-18	250	210	8-18	270	220	8-26
150	140	56	137	705	285	240	8-22	285	240	8-22	300	250	8-26
200	152	60	164	775	340	295	8-22	340	295	12-22	360	310	12-26
250	165	68	206	945	395	350	12-22	405	355	12-26	425	370	12-30
300	178	78	230	1070	445	400	12-22	460	410	12-26	485	430	16-30
350	190	78	248	1140	505	460	16-22	520	470	12-26	555	490	16-33
400	216	102	289	1210	565	515	16-26	580	525	16-26	620	550	16-36
450	222	114	320	1335	615	565	20-26	640	585	16-30	670	600	20-36
500	229	127	342	1415	670	620	20-26	715	650	20-30	730	660	20-36
600	267	154	413	1605	780	725	20-30	840	770	20-33	845	770	20-39
700	430	165	478	1844	895	840	24-30	910	840	24-36	960	875	24-42
800	470	190	525	2040	1015	950	24-33	1025	950	24-39	1085	990	24-48
900	510	203	585	2255	1115	1050	28-33	1125	1050	28-39	1185	1090	28-48
1000	550	216	640	2380	1230	1160	28-36	1255	1170	28-42	1320	1210	28-56
1200	630	254	755	2640	1455	1380	32-39	1485	1390	32-48	1530	1420	32-56

1. Before installation, check whether the specification, pressure, temperature and corrosion resistance of butterfly valve meet the use requirements. Check whether the parts are damaged or loose.
2. The butterfly valve can be installed on the pipeline at any angle and should be closed; when welding the pipe flange, the valve sealing port should be blocked with a plate to prevent particles and sundries from damaging the sealing surface. After welding, take down the valve, clean the valve sealing surface and pipe cavity, and then install the fixed valve.
3. Please pay attention to the pressure bearing direction when the valve is closed.
4. Before installation, the sealing surface (sealing surface at both ends, sealing surface of butterfly plate and sealing surface of valve seat) shall be thoroughly cleaned to remove dust and dirt.
5. Before installation, the butterfly valve should be air tested, and the opening and closing position should be flexible, and the opening and closing position should be consistent with the position indicated by the pointer.
6. Manual operation, clockwise is off, counter clockwise is on, pointer indication is in place, it is not allowed to open and close the valve with additional force.
7. During the pressure test of the valve, it is not allowed to use single flange for installation and pressure test, but double flange installation and pressure test must be adopted. The test pressure shall comply with GB / T13927-92.
8. The bolts shall be tightened symmetrically and alternately instead of separately.
9. The limit screw has been adjusted before delivery, so it is not allowed to adjust it easily. If the configuration of driving device is electric or pneumatic, please refer to the manual of supporting drive device.
10. When the electric butterfly valve leaves the factory, the opening and closing stroke of the control mechanism has been adjusted. In order to prevent the wrong direction when the power supply is connected, the user should first manually open it to the half open position before connecting the power for the first time, and then press the inching switch to check that the direction of the indicator wheel is consistent with the opening direction of the valve.
11. If the valve is found to be open and closed abnormally, the cause shall be found out for repair and elimination, so as to prevent the valve from being damaged due to opening and closing by means of applying force.