Implementation standard

Design and Manufacturing: GB 12238 (Midline)
Structure length: GB12221 (short series)
Flange size: JB78/JB79 (or as specified in the contract)
Pressure test: GB/T 13937
Mark: GB12220
Supply: GB/T 12252

Key size measurements

PN0.6MPa
Inside nominal diameter		Standard value							Reference
DN	NPS	L	D	D,	D2	f	b	Z-φd	Do	H	W(kg)
(mm)	(inch)	L	D	D,	D2	f	b	Z-φd	Do	H	W(kg)
40	1 1/2	33	130	100	80	3	16	4-φ14	160	140	2.5
50	2	43	140	110	90	3	16	4-φ14	200	145	3.5
65	2 1/2	46	160	130	110	3	16	4-φ14	250	155	4.5
80	3	46	185	150	125	3	18	4-φ18	250	165	6
100	4	52	205	170	145	3	18	4-φ18	250	180	7.5
125	5	56	235	200	175	3	20	8-φ18	300	203	11
150	6	56	260	225	200	3	20	8-φ18	300	225	16
200	8	60	315	280	255	3	22	8-φ18	200*	275	48
250	10	68	370	335	310	3	24	12-φ18	200*	315	60
300	12	78	435	395	362	4	24	12-φ23	240*	348	75
350	14	78	485	445	412	4	26	12-φ23	240*	415	82
400	16	102	535	495	462	4	28	16-φ23	280*	460	123
450	18	114	590	550	518	4	28	16-φ23	280*	500	150
500	20	127	640	600	568	4	30	16-φ23	320*	530	180
600	24	154	755	705	670	5	30	20-φ25	320*	610	225
700	28	165	860	810	775	5	32	24-φ25	360*	675	315
800	32	190	975	920	880	5	34	24-φ30	360*	805	385
900	36	203	1075	1020	980	5	36	24-φ30	380*	995	420
1000	40	216	1175	1120	1080	5	36	28-φ30	400*	1170	620
1200	48	254	1400	1340	1295	5	40	32-φ34	400*	1295	788

*Flange size D, D1, D2, Z-φd, f, b values are the standard flange size for butterfly valve connection. The size code in the schematic diagram is only part ofit.
Flange size: D,D1,D2,Z-φd,f,b"are standard parameter

product-282-75

product-373-285

product-285-269

D371 F4/F46/F/P type clamping worm gear transmission butterfly valve (midline)

Key size measurements

PN1.0MPa
Inside nominal diameter		Standard value							Reference value
DN(mm)	NPS(inch)	L	D	D1	D2	f	b	Z-Φd	Do	H	W(kg)
40	1 1/2	33	145	110	85	3	18	4-φ18	160	140	3
50	2	43	160	125	100	3	20	4-φ18	200	145	4
65	2 1/2	46	180	145	120	3	20	4-φ18	250	155	6
80	3	46	195	160	135	3	22	4/8-φ18	250	165	8
100	4	52	215	180	155	3	22	8-φ18	300	180	12
125	5	56	245	210	185	3	24	8-φ18	300	203	18
150	6	56	280	240	210	3	24	8-φ23	200*	225	28
200	8	60	335	295	265	3	26	8-φ23	200*	275	56
250	10	68	390	350	320	3	28	12-φ23	240*	315	72
300	12	78	440	400	368	4	28	12-φ23	240*	348	88
350	14	78	500	460	428	4	30	16-φ23	240*	415	120
400	16	102	565	515	482	4	32	16-φ25	280*	460	145
450	18	114	615	565	532	4	32	20-φ25	280*	500	165
500	20	127	670	620	585	4	34	20-φ25	320*	530	195
600	24	154	780	725	685	5	36	20-φ30	320*	610	268
700	28	165	895	840	800	5	40	24-φ30	360*	675	320
800	32	190	1010	950	905	5	44	24-φ34	360*	805	395
900	36	203	1110	1050	1005	5	46	28-φ34	380*	995	450
1000	40	216	1220	1160	1115	5	50	28-φ34	400*	1170	680
1200	48	254	1450	1380	1325	5	56	32-φ41	400*	1295	825

PN1.6MPa
Inside nominal diameter		Standard value							Reference value
DN(mm)	NPS(inch)	L	D	D1	D2	f	b	Z-φd	Do	H	W(kg)
40	1 1/2	33	145	110	85	3	18	4-φ18	200	145	4
50	2	43	160	125	100	3	20	4-φ18	200	150	5
65	2 1/2	46	180	145	120	3	20	4-φ18	250	160	7
80	3	46	195	160	135	3	22	8-φ18	250	170	10
100	4	52	215	180	155	3	24	8-φ18	300	185	14
125	5	56	245	210	185	3	26	8-φ18	300	210	22
150	6	56	280	240	210	3	28	8-φ18	200*	230	32
200	8	60	335	295	265	3	30	12-φ23	240*	285	66
250	10	68	405	355	320	3	32	12-φ25	240*	325	80
300	12	78	460	410	375	4	34	12-φ25	280*	360	94
350	14	78	520	470	435	4	38	16-φ25	280*	430	125
400	16	102	580	525	485	4	40	16-φ30	320*	475	150
450	18	114	640	585	545	4	44	20-φ30	320*	525	172
500	20	127	705	650	608	4	46	20-φ34	320*	565	225
600	24	154	840	770	718	5	54	20-φ41	360*	620	290
700	28	165	910	840	788	5	54	24-Φ41	360*	686	330
800	32	190	1020	950	898	5	54	24-φ41	380*	815	425
900	36	203	1120	1050	998	5	54	28-Φ41	400*	1010	495
1000	40	216	1255	1170	1110	5	60	28-φ48	400*	1185	710

The flange dimensions D, D1, D2, Z-φd, f, and b represent the standard flange sizes for butterfly valve connections. The dimension symbols in the schematic diagram are only a subset of these. For flange dimensions PN1.0MPa and DN80, the number of threaded holes is Z=4 for JB78 and Z=8 for other standards.

Implementation Standard

Design and Manufacturing: GB 12238 (Midline)
Structure length: GB 12221 (short-long series)
Flange size: JB78/JB79 (or as specified in the contract)

product-341-268

Butterfly Valve with Flange Connection and Worm Gear Transmission (Central Line)

Pressure test: GB/T 13937
Mark: GB12220
Supply: GB/T 12252

Key size measurements

PN0.6MPa
Inside nominal diameter		Standard value							Reference value
DN(mm)	NPS(inch)	L	D	D1	D2	f	b	Z-φd	DO	H	W(kg)
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	395	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	1900
1200	48	630	1400	1340	1295	5	40	32-φ34	400*	1170	2110

PN1.0MPa
Inside nominal diameter		Standard value							Reference value
DN(mm)	NPS(inch)	L	D	D1	D2	f	b	Z-φd	DO	H	W(kg)
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	13
80	3	114	195	160	135	3	22	4/8-φ18	250	170	14
100	4	127	215	180	155	3	22	8-φ18	300	180	16
125	5	140	245	210	185	3	24	8-φ18	300	275	18
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	670	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	24-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
1200	48	630	1450	1380	1325	5	56	32-φ41	400*	1200	2150

For flange dimensions PN1.0MPa and DN80, the number of threaded holes is Z=4 when JB78 is applied, and Z=8 for other standards.
When flange to PN1.0MPa/DN80/JB78 screw hole Z=4,to other parameter Z=8

PN1.6MPa
Inside nominal diameter		Standard value							Reference value
DN(mm)	NPS(inch)	L	D	D1	D2	f	b	Z-φd	DO	H	W(Kg)
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	13
80	3	114	195	160	135	3	22	8-φ18	260	170	14
100	4	127	215	180	155	3	24	8-φ18	300	180	16
125	5	140	245	210	185	3	26	8-φ18	300	275	18
150	6	140	280	240	210	3	28	8-φ23	200*	295	42
200	8	152	335	295	265	3	30	12-φ23	200*	320	78
250	10	250	405	355	320	3	32	12-φ25	240*	385	120
300	12	270	460	410	375	4	34	12-φ25	240*	390	145
350	14	290	520	470	435	4	38	16-φ25	240*	460	202
400	16	310	580	525	485	4	40	16-φ30	280*	510	235
450	18	330	640	585	545	4	44	20-φ30	280*	540	368
500	20	350	705	650	608	4	46	20-φ34	320*	570	420
600	24	390	840	770	718	5	54	20-φ41	320*	660	750
700	28	430	910	840	788	5	54	24-φ41	360*	710	1028
800	32	470	1020	950	898	5	54	24-φ41	380*	780	1690
900	36	510	1120	1050	998	5	54	28-φ41	400*	885	1815
1000	40	550	1255	1170	1110	5	60	28-φ48	500*	990	2050