Closed spring fully open safety valve A42Y

This valve is suitable for equipment and pipelines with unstable back pressure or toxic, corrosive media at working temperatures ≤ 200 ℃, as an overpressure protection device.

Product drawing

Product drawing.png

Product dimensions

model	Nominal Diameter	do	D	K	g	g1	b	f	f1	Z-ød	DN'	D1	K1	g3	g2	b1	f'	f1'	Z1-ød1	L	L1	≈H
A42H-16C/P/R KA42H-16C DA42H-16C/P	20	15	105	75	-	55	16	2	-	4-14	25	115	85	-	65	16	2	-	4-14	110	95	378
	25	16	115	85	-	65	16	2	-	4-14	32	140	100	-	78	18	2	-	4-18	110	95	378
	32	20	140	100	-	78	18	2	-	4-18	40	150	110	-	85	18	3	-	4-18	115	100	378
	40	25	150	110	-	85	18	3	-	4-18	50	165	125	-	100	20	3	-	4-18	120	110	406
	50	32	165	125	-	100	20	3	-	4-18	65	185	145	-	120	20	3	-	4-18	135	120	450
	65	40	185	145	-	120	20	3	-	4-18	80	200	160	-	135	20	3	-	8-18	160	140	520
	80	50	200	160	-	135	20	3	-	8-18	100	220	180	-	155	22	3	-	8-18	170	135	525
	100	65	220	180	-	155	22	3	-	8-18	125	250	210	-	185	22	3	-	8-18	195	175	690
	125	80	250	210	-	185	22	3	-	8-18	150	285	240	-	210	24	3	-	8-23	210	190	780
	150	100	285	240	-	210	24	3	-	8-23	175	310	270	-	240	26	3	-	8-23	255	230	838
	200	125	340	295	-	265	26	3	-	12-23	250	405	355	-	320	30	3	-	12-26	300	260	992
	250	150	405	355	-	320	30	3	-	12-26	300	460	410	-	375	30	4	-	12-26	350	320	1266
	300	220	460	410	-	375	30	4	-	12-26	400	580	525	-	485	36	4	-	16-30	370	350	1283
	350	250	520	470	-	435	34	4	-	16-26	500	715	650	-	608	44	4	-	20-34	500	450	1520
	400	280	580	525	-	485	36	4	-	16-30	500	715	650	-	608	44	4	-	20-34	500	450	1530
A42H-25C/P/R KA42H-25C DA42H-25P	20	15	105	75	-	55	16	2	-	4-14	25	115	85	-	65	16	2	-	4-14	110	95	378
	25	16	115	85	-	65	16	2	-	4-14	32	140	100	-	78	18	2	-	4-18	110	95	378
	32	20	140	100	-	78	18	2	-	4-18	40	150	110	-	85	18	3	-	4-18	115	100	378
	40	25	150	110	-	85	18	3	-	4-18	50	165	125	-	100	20	3	-	4-18	120	110	406
	50	32	165	125	-	100	20	3	-	4-18	65	185	145	-	120	20	3	-	4-18	135	120	450
	65	40	185	145	-	120	22	3	-	8-18	80	200	160	-	135	20	3	-	8-18	160	140	520
	80	50	200	160	-	135	22	3	-	8-18	100	220	180	-	155	22	3	-	8-18	170	135	525
	100	65	230	190	-	160	24	3	-	8-23	125	250	210	-	185	22	3	-	8-18	195	175	690
	125	80	270	220	-	188	28	3	-	8-26	150	285	240	-	210	24	3	-	8-23	210	190	780
	150	100	300	250	-	218	30	3	-	8-26	175	310	270	-	240	26	3	-	8-23	255	230	838
	200	125	360	310	-	278	34	3	-	12-26	250	405	355	-	320	30	3	-	12-26	300	260	992
	250	150	425	370	-	332	36	3	-	12-30	300	460	410	-	375	30	4	-	12-26	350	320	1266
	300	220	485	430	-	390	40	4	-	16-30	400	580	525	-	485	36	4	-	16-30	370	350	1283
A42H-40C/P/R KA42H-40C DA42H-40P	20	15	105	75	51	55	16	2	4	4-14	25	115	85	-	65	16	2	-	4-14	110	95	378
	25	16	115	85	58	65	16	2	4	4-14	32	140	100	-	78	18	2	-	4-18	110	95	378
	32	20	140	100	66	78	18	2	4	4-18	40	150	110	-	85	18	3	-	4-18	115	100	378
	40	25	150	110	76	85	18	3	4	4-18	50	165	125	-	100	20	3	-	4-18	120	110	406
	50	32	165	125	88	100	20	3	4	4-18	65	185	145	-	120	20	3	-	4-18	135	120	450
	65	40	185	145	110	120	22	3	4	8-18	80	200	160	-	135	20	3	-	8-18	160	140	520
	80	50	200	160	121	135	22	3	4	8-18	100	220	180	-	155	22	3	-	8-18	170	135	525
	100	65	235	190	150	160	24	3	4.5	8-23	125	250	210	-	185	22	3	-	8-18	195	175	690
	125	80	270	220	176	188	28	3	4.5	8-26	150	285	240	-	210	24	3	-	8-23	210	190	780
	150	100	300	250	204	218	30	3	4.5	8-26	175	310	270	-	240	26	3	-	8-23	255	230	838
	200	125	375	320	260	282	38	3	4.5	12-30	250	405	355	-	320	30	3	-	12-26	300	260	992
	250	150	450	385	313	345	42	3	4.5	12-34	300	460	410	-	375	30	4	-	12-26	350	320	1266
A42H-64 C/P/RDA42H-64P	20	10	125	90	51	68	22	2	4	4-18	25	115	85	58	65	16	2	4	4-14	96	85	264
	25	16	140	100	58	78	22	2	4	4-18	32	140	100	66	78	18	2	4	4-18	110	100	277
	32	20	155	110	66	82	24	2	4	4-23	40	150	110	76	85	18	3	4	4-18	130	110	289
	40	25	170	125	76	95	24	3	4	4-23	50	165	125	88	100	20	3	4	4-18	130	120	319
	50	32	180	135	88	105	26	3	4	4-23	65	185	145	110	120	222	3	4	8-18	135	130	389
	65	40	205	160	110	130	28	3	4	8-23	80	200	160	121	135	22	3	4	8-18	175	160	493
	80	50	215	170	121	140	30	3	4	8-23	100	235	190	150	160	24	3	4.5	8-23	175	160	483
	100	65	250	200	150	168	32	3	4.5	8-26	125	270	220	176	188	28	3	4.5	8-25	195	195	613
	150	100	345	280	204	240	38	3	4.5	8-34	200	375	320	260	282	38	3	4.5	12-30	280	265	894
A42H-100 C/P/R DA42H-100P	20	10	125	90	51	68	22	2	4	4-18	25	115	85	58	65	16	2	4	4-14	96	85	264
	25	16	140	100	58	78	24	2	4	4-18	32	140	100	66	78	18	2	4	4-18	110	100	277
	32	20	155	110	66	82	24	2	4	4-23	40	150	110	76	85	18	3	4	4-18	130	110	289
	40	25	170	125	76	95	26	3	4	4-23	50	165	125	8	100	20	3	4	4-18	130	120	319
	50	32	195	145	88	112	28	3	4	4-26	65	185	145	110	120	22	3	4	8-18	135	130	389
	65	32	220	170	110	138	32	3	4	8-26	80	200	160	121	135	22	3	4	8-18	175	160	493
	80	40	230	180	121	148	34	3	4	8-26	100	235	190	150	160	24	3	4.5	8-23	175	160	483
	100	50	265	210	150	172	38	3	4.5	8-30	125	270	220	176	188	28	3	4.5	8-25	195	195	613
	150	80	355	290	204	250	46	3	4.5	12-34	200	375	320	260	282	38	3	4.5	12-30	280	265	894

Technical Documentation

1.execution standard：GB/T 12243-2021

2.Structural length standard：GB/T12221-2005

3.Flange Standard：GB/T9113.1-2000

4.Test Standard：GB/T13927-2022

Product Parts List

serial number	name	A42H-C/KA42H-Cmaterial	A42H-P/KA42H-Pmaterial	A42H-Rmaterial	DA42H-Pmaterial
1	valve seat	20Cr13/304	304	CF8M	304
2	valve body	WCB	CF8	CF8M	LCB/304
3	Adjustment Circle	20Cr13/304	304	316	304
4	Recoil plate	20Cr13/304	304	316	304
5	valve disc	20Cr13/304	304	316	304
6	guide bushing	20Cr13/304	304	316	304
7	valve cover	25#	25#	25#	CF8
8	spring	50CrVA	50CrVACovering fluoroplastic	50CrVACovering fluoroplastic	50CrVA
9	valve stem	20Cr13	304	304/316	304
10	adjusting screw	45#	20Cr13	20Cr13	20Cr13
11	valve cap	ZG200-400	ZG200-400	ZG200-400	25#
12	Sealing surface material	Welding Co based Hard Alloy

Prev：Closed spring fully open safety valve A42F

Next：Open type wrench spring micro opening safety valve A47H

Related Information