D363HOn the basis of introducing foreign advanced technology, the intrepid hard seal butterfly valve PN10 ～ PN40 is the industrial opening valve. It adopts the precise J-shaped elastic sealing ring and three eccentric multi-level metal hard sealing structure. It is widely used in the industrial pipelines such as metallurgy, electric power, petrochemical, water supply and drainage, municipal construction and other industrial pipelines with medium temperature ≤ 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 bidirectional sealing function. The product meets the national GB / T13927-92 valve pressure test standard.

D363HMain technical parameters of hard seal butterfly valve PN10 ～ PN40

Nominal diameterDN（mm)	DN（100～1200）mm、in4～48
Nominal pressurePN（Mpa)	Strength test (1.5 × PN) sealing test(1.1×PN)
Applicable temperature	Carbon steel: - 29 ℃～ 425 ℃ stainless steel：-40℃～650℃
Applicable media	Water, steam, hot water, oil
Driving mode	Worm gear drive, electric, pneumatic and hydraulic
Pressure rating	ANSI 150Lb class / PN25
Welding standards	GB12224、ANSI B16、25、DIN2559

1. The triple eccentric butterfly valve can be regarded as the top process valve. This design makes the valve an ideal hard seal butterfly valve with bubble seal in high temperature, high pressure and fire protection applications.
2. Because of the welding structure, the valve and the pipe plane achieve permanent zero leakage.
3. This valve has no flange, which brings great convenience and beauty to pipeline and thermal insulation wrapping.

D363HMaterials of main parts and components of fierce hard seal butterfly valve PN10 ～ PN40

Part name	Material Science
valve body	Carbon steel, stainless steel, chromium aluminum steel
Disc	Carbon steel, alloy steel, stainless steel
valve seat	3 stainless steel, cobalt based cemented carbide
axle sleeve	stainless steel
Stem	Stainless steel, special materials
filler	Flexible graphite

D363HMain connection dimensions of butt type hard seal butterfly valve PN10 ～ PN40(mm)

Nominal diameter		Main dimensions			Nominal diameter		Main dimensions
in	DN(mm)	L	H1	H	in	DN(mm)	L	H1	H
4	100	190	270	370	18	450	330	535	820
5	125	200	295	390	20	500	350	560	900
6	150	210	308	416	24	600	390	630	980
8	200	230	370	530	28	700	430	670	1100
10	250	250	450	580	32	800	470	800	1300
12	300	270	465	630	36	900	510	850	1370
14	350	290	475	595	40	1000	550	880	1480
16	400	310	505	755	48	1200	630	1000	1690

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.