Model: d343x diameter (DN): 50 ~ 400 (mm) pressure (PN): 0.6 ~ 1.6 (MPA) product price: telephone date: 12-04-24 browse: 231 times

D343x flange double eccentric soft seal butterfly valve pn6 ～ PN16 is suitable for temperature ≤ 120 ℃ and nominal pressure ≤ 1.6Mpa. It is widely used in water supply and drainage and gas pipeline of food, medicine, chemical industry, petroleum, electric power, light textile, papermaking, etc.

D343X Connection dimensions of pn6 ～ PN16 flange double eccentric soft seal butterfly valve(mm)
Nominal diameter		Structural length	Structural length				Connection size
							0.6MPa				1.0MPa				1.6MPa
mm	Inch	L	H	H0	A	B	D	D1	D2	n-d	D	D1	D2	n-d	D	D1	D2	n-d
50	2	108	82.5	338	180	65	140	110	88	4-14	165	125	99	4-18	165	125	99	4-18
65	2 1/2	112	92.5	358	180	65	160	130	108	4-14	185	145	118	4-18	185	145	118	4-18
80	3	114	100	413	245	70	190	150	124	4-18	200	160	132	8-18	200	160	132	8-18
100	4	127	110	428	240	72	210	170	144	4-18	220	180	156	8-18	220	180	156	8-18
125	5	140	125	444	240	72	240	200	174	8-18	250	210	184	8-18	250	210	184	8-18
150	6	140	142.5	553	350	93	265	225	199	8-18	285	240	211	8-22	285	240	211	8-22
200	8	152	170	678	350	93	320	280	254	8-18	340	295	266	8-22	340	295	266	12-22
250	10	165	197.5	742	550	350	375	335	309	12-18	395	350	319	12-22	405	355	319	12-26
300	12	178	222.5	803	600	350	440	395	363	12-22	445	400	370	12-22	460	410	370	12-26
350	14	190	252.5	866	600	350	490	445	416	12-22	505	460	429	16-22	520	470	429	16-26
400	16	216	282.5	940	600	350	540	495	463	16-22	656	515	480	16-26	580	525	480	16-30

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.

 

1. Before leaving the factory, the products are inspected to be qualified according to the provisions of the standards (GB / T13927-92, JB / t9092-1999), and the commissioning of the actuator is completed. In order to ensure the use effect of the product, do not adjust the firmware and positioning device at will.
2. The following work should be done before valve installation
Check whether the pipe flange is consistent with the valve connection size, tighten the nuts evenly during installation, and put the flange sealing gasket symmetrically.
Carefully check whether the working condition is consistent with the working pressure, working temperature and corrosion resistance of the product;
Check whether there is dirt attached to the valve passage and opening and closing parts. If there is dirt, clean it, and the sealing surface shall not be damaged;
Check whether all parts of the valve are tight or intact;
The valve is bi-directional sealed, 90 ° rotating, 0 ° fully closed and 90 ° fully open. Observe whether the opening and closing position of the valve is consistent with this. And check whether there is jamming phenomenon.