D371F4 Type pn6 ～ PN10 double clip type fluorine lined worm gear butterfly valve pn6 ～ PN10 is suitable for the transportation of liquid and gas (including steam) in various types of industrial pipelines, especially in the use of severe corrosive media, such as sulfuric acid, hydrofluoric acid, phosphoric acid, chlorine, strong alkali, aqua regia and other strong corrosive media.

D371F4-6、D371F4-10 Connection dimension of F-type butterfly valve with fluorine lining

DN （mm）	NPS (inch)	L	D	D1	D2	F	B	N-ΦD	W	D0	H	WT(kg)
		PN0.6MPa
40	1 1/2	106	130	100	80	3	16	4-Φ14	160		140	10
50	2	108	140	110	90	3	16	4-Φ14	200		160	12
65	2 1/2	112	160	130	110	3	16	4-Φ14	250		160	13
80	3	114	185	150	125	3	18	4-Φ18	250		170	14
100	4	127	205	170	145	3	18	4-Φ18	300		180	16
125	5	140	235	200	175	3	20	8-Φ18	300		275	18
150	6	140	260	225	200	3	20	8-Φ18		200	295	38
200	8	152	315	280	255	3	22	8-Φ18		200	320	74
250	10	250	370	335	310	3	24	12-Φ18		240	385	105
300	12	270	435	375	362	4	24	12-Φ23		240	390	142
350	14	290	485	445	412	4	26	12-Φ23		240	460	179
400	16	310	535	495	462	4	28	16-Φ23		280	510	220
450	18	330	590	550	518	4	28	16-Φ23		280	540	268
500	20	350	640	600	568	4	30	16-Φ23		320	570	378
600	24	390	755	705	670	5	30	20-Φ25		320	660	608
700	28	430	860	810	775	5	32	24-Φ25		360	710	1050
800	32	470	975	920	880	5	34	24-Φ30		360	780	1320
900	36	510	1075	1020	980	5	36	24-Φ30		380	885	1795
1000	40	550	1175	1120	1080	5	36	28-Φ30		400	990
PN1.0MPa
40	1 1/2	106	145	110	85	3	18	4-Φ18	160		140	10
50	2	108	160	125	100	3	20	4-Φ18	200		160	12
65	2 1/2	112	180	145	120	3	20	4-Φ18	250		165	14
80	3	114	195	160	135	3	22	4-Φ18	250		170	16
100	4	127	215	180	155	3	22	8-Φ18	300		180	18
125	5	140	245	210	185	3	24	8-Φ18	300		275	20
150	6	140	280	240	210	3	24	8-Φ23		200	295	38
200	8	152	335	295	265	3	26	8-Φ23		200	320	74
250	10	250	390	350	320	3	28	12-Φ23		240	385	105
300	12	270	440	400	368	4	28	12-Φ23		240	390	142
350	14	290	500	460	428	4	30	16-Φ23		240	460	179
400	16	310	565	515	482	4	32	16-Φ25		280	510	220
450	18	330	615	565	532	4	32	20-Φ25		280	540	268
500	20	350	380	620	585	4	34	20-Φ25		320	570	378
600	24	390	780	725	685	5	36	20-Φ30		320	660	608
700	28	430	895	840	800	5	40	20-Φ30		360	710	1050
800	32	470	1010	950	905	5	44	24-Φ34		360	780	1320
900	36	510	1110	1050	1005	5	46	28-Φ34		380	885	1795
1000	40	550	1220	1160	1115	5	50	28-Φ34		400	990	1900

 

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.