D973HType a hard seal electric double clip butterfly valve series products, is a long life, energy-saving butterfly valve. Its structure adopts the three-dimensional core principle design, the valve seat adopts the multi-level structure of hard and soft sealing compatibility, with exquisite processing and advanced technology. This product is composed of valve body, butterfly plate, multi-level valve seat, valve rod, transmission mechanism and other main components. Therefore, it is widely used in metallurgy, electric power, petroleum, chemical industry, air, gas, combustible gas and water supply and drainage pipeline.

1. Powerful function: intelligent, adjustable and switch type.
2. Small size: its volume is only about 35% of that of similar products.
3. Easy to use: single phase power supply, simple wiring; unique ball shaped protruding structure, making observation more convenient; no oil, no spot check, waterproof and rust proof, installation at any angle.
4. The protection device has double limit, overheat protection and overload protection. The whole travel time is 15 seconds, 30 seconds, 45 seconds and 60 seconds. And with manual function.
5. Intelligent numerical control: the built-in module adopts advanced single-chip computer and intelligent control software to directly receive the standard signal (4-20mA DC / 1-5vdc) output from computer or industrial instruments to realize intelligent control and precise positioning of valve opening.
3810 series or Na series electronic angular travel actuator can be selected. PSQ series or dyr series can also be selected. 380VAC electric actuator is generally used for valves with diameter ≥ DN 200. Domestic brands such as Ruiji, Aotuoke, Yangzhou electric power, tianertong, Lanling, etc.; foreign brands include British rotok, French Bernard, Germany Ouma, Germany Sibos (Siemens), etc

Because the butterfly valve of this product adopts the three-dimensional eccentric design principle, the space movement track of the sealing surface is idealized, and there is no friction and interference between the sealing surfaces. In addition, the proper selection of sealing materials ensures the sealing performance, corrosion resistance, high temperature resistance and wear resistance of the butterfly valve. Its main characteristics are as follows:
1. Small opening torque, flexible and convenient, labor-saving and energy-saving.
2. The three-dimensional core structure makes the butterfly plate closer and tighter. Its sealing performance is reliable and no leakage is achieved.
3. High pressure resistance, corrosion resistance, wear resistance, long service life, etc.

D973HMain technical parameters of type a hard seal electric double clip butterfly valve

Nominal diameterDN（mm)	50～2000
Nominal pressurePN（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

D973HWorm gear drive, electric, pneumatic and hydraulic

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

D973HType a hard seal electric double clip butterfly valve adopts standard

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

D973HMain external connection dimensions of type a hard seal electric double clip butterfly valve(mm)

Nominal diameter(DN)	Main dimensions			Flange size and bolt specification
				1.0MPa		1.6MPa		2.5MPa
	L	H	H1	D1	4-Ф－M	D1	4-Ф－M	D1	4-Ф－M
50	43	530	112	125	Ф18	125	Ф18	125	Ф18
65	46	530	115	145	Ф18	145	Ф18	145	Ф18
80	49	565	120	160	Ф18	160	Ф18	160	Ф18
100	56	600	138	180	Ф18	180	Ф18	190	Ф23
125	64	640	164	210	Ф18	210	Ф18	220	Ф27
150	70	705	175	240	Ф23	240	Ф23	250	Ф27
200	71	775	208	295	M20	295	M20	310	M24
250	76	945	243	350	M20	355	M24	370	M27
300	83	1070	283	400	M20	410	M24	430	M27
350	92	1140	310	460	M20	470	M24	490	M30
400	102	1210	340	515	M24	525	M27	550	M33
450	114	1335	380	565	M24	585	M27	600	M33
500	127	1415	410	620	M24	650	M30	660	M33
600	154	1605	470	725	M27	770	M33	770	M36
700	165	1844	550	840	M27	840	M33	875	M39
800	190	2040	640	950	M30	950	M36	990	M45
900	203	2255	710	1050	M30	1050	M36	1090	M45
1000	216	2380	770	1160	M33	1170	M39	1210	M52
1200	254	2640	890	1380	M36	1390	M45	1420	M52

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.