D973HThe electric hard seal butterfly valve PN10 ~ PN16 is a multi-layer metal three eccentric hard seal structure, which adopts a U-shaped stainless steel sealing ring. The precise elastic sealing ring contacts with the polished butterfly plate in three-dimensional eccentric way. The electric hard seal butterfly valve solves the problem that the sealing surface of the traditional eccentric butterfly valve is still in sliding contact friction at the moment of opening and closing 0 ° to 10 ° and realizes the effect that the sealing surface of the butterfly plate is separated at the moment of opening and the sealing effect is that the contact is closed, so as to prolong the service life and improve the sealing performance. Therefore, electric hard seal butterfly valve is widely used in metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage pipeline with medium temperature ≤ 550 ℃. Zui excellent device for regulating flow and cutting off fluid with electric hard seal butterfly valve.

1. The butterfly valve has the advantages of simple structure, compact structure, light weight, easy installation and disassembly, and convenient maintenance.
2. The butterfly valve adopts stainless steel "U" type sealing ring, which has certain elasticity. No matter in high temperature or low temperature, it has excellent sealing performance with butterfly plate.
3. After strict calculation of the three-dimensional eccentricity of the butterfly valve, the U-shaped seal ring has almost no friction with the butterfly plate, and has a long service life, and has the function of closing more tightly.
4. The sealing surface of butterfly plate is made of hardfacing cobalt base cemented carbide, which is wear-resistant and has long service life.
5. The butterfly valve has a unique structure, and the "on-off" can be completed only by turning the valve stem 90 degrees. The operation is flexible, convenient, labor-saving, not affected by the medium pressure, and the sealing performance is reliable.
6. It can resist high temperature, low temperature and corrosion.

D973HMain performance specification of electric hard seal butterfly valve PN10 ～ PN16

Nominal diameterDN（mm）		50-1200
Nominal pressurePN（MPa)		1.0		1.6
公称压力PS（MPa)	strength test	1.5		2.4
	Sealing test	1.1		1.76
Material / material code		C	P	R
Main parts	valve body	WCB	ZG1Cr18Ni9Ti	ZG0Cr18Ni12Mo2Ti
	Disc	WCB	ZG1Cr18Ni9Ti	ZG0Cr18Ni12Mo2Ti
	Stem	2Cr13	1Cr18Ni9Ti	0Cr18Ni12Mo2Ti
	seal ring	PTFE stainless steel
	filler	Teflon flexible graphite
Applicable conditions	Applicable media	Water, steam and oil	Nitric acid	Acetic acid
	Applicable temperature	-40℃～200℃(beyond the temperature range; please indicate when ordering)

D973HMain external connection dimensions of electric hard seal butterfly valve PN10 ～ PN16（mm)

Nominal diameterDN(mm)	尺寸(mm)
	L	D	D1	H	H0	Z-Φd
50	43	165	125	82	260	4-18
65	46	185	145	95	280	8-18
80	49	200	160	108	355	8-18
100	56	220	190	125	390	8-23
125	64	250	220	138	490	8-25
150	70	285	250	198	630	8-25
200	71	340	310	236	690	12-25
250	76	405	370	276	830	12-30
300	83	460	430	308	930	16-30
350	92	520	490	340	1010	16-34
400	102	580	550	374	1070	16-34
450	114	640	600	384	1140	20-34
500	127	715	660	448	1200	20-41
600	154	840	770	490	1340	20-41
700	165	910	875	542	1600	24-48
800	190	1025	990	607	1780	24-48
900	203	1125	1090	665	1920	28-54
1000	216	1255	1210	731	1960	28-58
1200	254	1485	1420	842	2360	32-58

 

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. Please refer to the manual for electric 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.