Spring Loaded Low Lift Type Safety Valve

Model
A 41 H/A 47 H/A 61 H

Spring loaded low lift type safety valve applications

A 41 H is to be used in equipments or pipelines of air, petroleum, water and other mediums with operation temperature no higher than 300℃, while A41Y 16/25/40P is to be used in equipments and pipelines of corrosive medium with operation tem-premature no higher than 200℃. A47H is to be used in equipments and pipelines of steam, air, water and other mediums with temper-nature no higher than 350℃. When the pressure in equipment or pipeline exceeds allowed value, the valve will open automatically and fully discharge, then close again when the pressure lowered to the regulated value so as to ensure the safe operation of the equipment or pipeline.
This valve is to be used in equipments and pipelines of air, petroleum, water or other mediums with operation temperature no higher than 300℃, while A47H is to be used in equipments and pipelines of steam, When the pressure in equipment or pipeline exceeds allowed value, the valve will open automatically and fully discharge, then close again when the pressure lowered to the regulated value soaps to ensure the safe operation of the equipment or pipeline.
A61H/Y-160, A61H/Y-320 is to be used as over-pressure protection device in equipments and pipelines of mediums like air, am-mania, petroleum and other mediums with operation temperature no higher than 200℃, while A61Y-160P, A61Y-320P is to be used as a in equipments or pipelines of corrosive gas or liquid with temperature no higher than 200℃.

Spring Loaded Low Lift Type Safety Valve brief figure of structure

Spring loaded low lift type safety valve dimensions (mm)Top of page

Nominaldiameter DN(mm)	Dimensions (mm)
	d0	L	L1	DN’
25	20	100	85	25
32	25	115	100	32
40	32	120	110	40
50	40	135	120	50
65	50	140	130	65
80	65	160	135	80
100	80	170	160	100
125	100	190	190	125
150	125	205	195	150
200	150	240	245	200

Nominal diameter DN(mm)	Dimensions (mm)
	d0	L	L1	DN’
25	20	100	100	25
32	25	115	105	32
40	32	135	120	40
50	40	160	130	50
65	50	175	160	65
80	65	175	160	80
100	80	190	180	100
150	100	220	210	150

Nominal Pressure PN (MPa)	Nominal Diameter DN (mm)	Dimensions (mm)
		d0	D	D1	D2	L	L1	H
16	10	6	17	14	12	95	120	78
	15	8	22	18	16	100	130	85
	20	10	28	22	20	115	135	135
	25	12	35	26	24	120	140	142
32	10	6	22	14	12	95	120	80
	15	8	25	17	15	100	130	90
	20	10	30	22	20	115	135	140
	25	12	38	26	24	120	140	148

Spring loaded low lift type safety valve materials for main partsTop of page

No.	Name of part	A41H-C/KA41Y-C Materials	A41Y-P/KA41Y-P Materials	A41Y-R/KA41Y-R Materials
1	Body	WCB	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
2	Nozzle	ZG2Cr13/1Cr18Ni9Ti	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
3	Adjusting ring	ZG2Cr13/1Cr18Ni9Ti	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
4	Disc	2Cr13/1Cr18Ni9Ti	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
5	Guide sleeve	ZG2Cr13/1Cr18Ni9Ti	ZG1Cr18Ni9Ti	ZG1Cr18Ni12Mo2Ti
6	Bonnet	ZG230-450	ZG230-450	ZG230-450
7	Spring	50CrVA	Coated Teflon	Coated Teflon
8	Stem	2Cr13	2Cr13	1Cr18Ni12Mo2Ti
9	Adjusting bolt	45	2Cr13	2Cr13
10	Cap	ZG200-400	ZG200-400	ZG200-400
Sealing surface of material		D507	Depositing satellite

Note: K----sulfur resistant safety valve.

No.	Name of part	A47H  A41Y-160  A41Y-320 Materials	A41Y-160P  A41Y-320P Materials	A41Y-160R  A41Y-320R Materials
1	Flange	35/35CRMoA	2Cr13	1Cr18Ni9Ti
2	Nozzle	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
3	Body	35/40	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
4	Disc	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
5	Guide sleeve	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
6	Bonnet	50CrVA	Coated Teflon	Coated Teflon
7	Spring	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
8	Stem	ZG230-450	1Cr18Ni9Ti	1Cr18Ni9Ti
9	Adjusting bolt	45	2Cr13	2Cr13
10	Cap	ZG200-400	1Cr18Ni9Ti	1Cr18Ni9Ti
Sealing surface of seat and disc		Depositing satellite

Spring loaded low lift type safety valve ralated productsTop of page

• Spring Loaded Low Lift Type Safety Valve
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• Closed Spring Loaded Full Bore Type-High Pressure Safety Valve
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