D943HThe electric hard seal butterfly valve PN10 ～ PN25 is based on the introduction of foreign advanced technology. It adopts precision J-shaped elastic sealing ring and three eccentric multi-level metal hard sealing structure. It is widely used in the industrial pipelines of gold treatment, electric power, petrochemical, water supply and drainage and municipal construction with medium temperature less than 425 ℃ for regulating flow and carrying off fluid. The valve adopts three eccentric structure. The valve seat and disc sealing surface are made of different hardness and stainless steel. It has good corrosion resistance and long service life. The valve has two-way sealing function. The product meets the national GB / T13927-92 valve pressure test standard.

1. The valve adopts three eccentric sealing structure, the valve seat and butterfly plate almost have no wear, with the sealing function of more and more tight.
2. The seal ring is made of stainless steel, which has the double advantages of metal hard seal and elastic seal. It has excellent sealing performance, corrosion resistance and long service life under low and high temperature conditions.
3. The sealing surface of disc plate is made of hardfacing cobalt base cemented carbide, which is wear resistant and has long service life
4. Large size butterfly plate adopts quilting frame structure with high strength, large flow area and small flow resistance.
5. The valve has two-way sealing function. It is not limited by the flow direction of medium or affected by the space position. It can be installed in any direction.
6. The driving device can be installed in multiple positions (90 ° or 180 ° rotation), which is convenient for users.

D943HMain technical parameters of electric hard seal butterfly valve PN10 ～ PN25

Nominal diameterDN（mm)	50～2000
Nominal pharmacologyPN（Mpa)	0.6	1.0	1.6	2.5
Sealing test(Mpa)	0.66	1.1	1.76	2.75
strength test(Mpa)	0.9	1.5	2.4	3.75
Applicable temperature	Carbon steel: - 29 ℃～ 425 ℃, stainless steel: - 40 ℃～ 650 ℃
Applicable media	Water, air, natural gas, oil and weak corrosive fluid
Leakage rate	In accordance with GB / T13927-92
Driving mode	Worm gear drive, electric, pneumatic and hydraulic

D943HMaterials of main parts and components of electric hard seal butterfly valve PN10 ～ PN25

Part name	Material Science
valve body	WCB、Alloy steel, stainless steel、QT450-10
Disc	WCB、Alloy steel, stainless steel、QT450-10
Valve shaft	2Cr13Stainless steel, alloy steel
seal ring	Stainless steel ring
filler	Flexible graphite

 

D943HStandard for electric hard seal butterfly valve PN10 ～ PN25

Manufacturing standards	JB/T 8527-97
Flange standard	GB9113-2000
Structural length standard	GB12221-89
Inspection standard	GB/T 13927-92

D943HMain external connection dimensions of electric hard seal butterfly valve PN10 ～ PN25（mm)

Nominal diameter(DN)	Main dimensions			Flange size and bolt specification
				1.0MPa			1.6MPa			2.5MPa
	L	H1	H	D	D1	n-Фd	D	D1	n-Фd	D	D1	n-Фd
50	108	530	112	165	125	4-18	165	125	4-18	165	125	4-18
65	112	530	115	185	145	4-18	185	145	4-18	185	145	8-18
80	114	565	120	200	160	4-18	200	160	8-18	200	160	8-18
100	127	600	138	220	180	8-18	220	180	8-18	235	190	8-22
125	140	640	164	250	210	8-18	250	210	8-18	270	220	8-26
150	140	705	175	285	240	8-22	285	240	8-22	300	250	8-26
200	152	775	200	340	295	8-22	340	295	12-22	360	310	12-26
250	165	945	243	395	350	12-22	405	355	12-26	425	370	12-30
300	178	1070	250	445	400	12-22	460	410	12-26	485	430	16-30
350	190	1140	280	505	460	16-22	520	470	12-26	555	490	16-33
400	216	1210	305	565	515	16-26	580	525	16-26	620	550	16-36
450	222	1335	350	615	565	20-26	640	585	16-30	670	600	20-36
500	229	1415	380	670	620	20-26	715	650	20-30	730	660	20-36
600	267	1605	445	780	725	20-30	840	770	20-33	845	770	20-39
700	292	1844	480	895	840	24-30	910	840	24-36	960	875	24-42
800	318	2040	530	1015	950	24-33	1025	950	24-39	1085	990	24-48
900	330	2255	580	1115	1050	28-33	1125	1050	28-39	1185	1090	28-48
1000	410	2380	650	1230	1160	28-36	1255	1170	28-42	1320	1210	28-56
1200	470	2640	760	1455	1380	32-39	1485	1390	32-48	1530	1420	32-56
1400	530	2886	850	1675	1590	36-42	1685	1590	36-48	1755	1640	36-62
1600	600	3156	1030	1915	1820	40-48	1930	1820	40-56	1975	1860	40-62
1800	670	3421	1230	2115	2020	44-48	2130	2020	44-56	2195	2070	44-70
2000	760	3685	1350	2325	2230	48-48	2345	2230	48-62	2425	2300	48-70

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.