Closed spring fully open slow closing safety valve AH42F

Overview of AH42F type leakage reflux valve for liquefied petroleum gas stainless steel fully open pressure relief valve

The AH42F type relief reflux valve is suitable for the liquid phase return pipeline produced by liquefied petroleum gas tank pumps. When the pressure in the equipment and pipeline exceeds the allowable value, the valve automatically opens and then discharges the full amount. When the pressure drops to the specified value, the valve automatically closes to ensure the normal operation of the equipment.

AH42F type leakage reflux valve for liquefied petroleum gas, stainless steel, fully open pressure relief valve, applicable scope

This relief valve is suitable for urban construction, chemical, metallurgical, petroleum, pharmaceutical, food, beverage, and environmental protection.

Product drawing

Product drawing.png

Product dimensions

model	path	do	D	K	g	g1	b	f	f1	Z-?d	DN'	D1	K1	g2	b1	f'	Z1-?d1	L	L1	≈H
AH42F-16C	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
AH42F-25	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
AH42F-40	20	15	105	25	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

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	AH42F-C A42F-C material
1	valve seat	20Cr13
2	valve body	WCB
3	Adjustment Circle	20Cr13
4	Recoil plate	20Cr13
5	valve disc	20Cr13+PTFE
6	guide bushing	20Cr13
7	valve cover	25#
8	spring	50CrVA
9	valve stem	20Cr13
10	adjusting screw	45#
11	valve cap	ZG200-400

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