Sinopec Shanghai Valve Manufzcturing Co.,LTD.

Description Material Performance Product Size Specifications

A42Y spring full open closed safety valve suitable for equipment and piping work temperature are less than 300 air, petroleum gas and liquid medium. As overpressure protection device. When the equipment and pipeline internal pressure exceeds the limit from the noise, the valve automatically opens, then the whole amount of emissions, when the pressure is reduced to the specified value, the valve automatically closes to ensure the safe operation of equipment and piping.
Note: parameters are for reference only, or are not full. Valve can be used in accordance with the requirements of different pressure, material, diameter, drive, etc.. Specific please contact or online advisory contact.

NO.	Part name	A42Y-160 A42Y-320 Material Science	A42Y-160P A42Y-320P Material Science	A42Y-160R A42Y-320R Material Science
1	flange	35/35CrMoA	2Cr13	1Cr18Ni12Mo2Ti
2	valve seat	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
3	valve body	40	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
4	Adjusting ring	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
5	Valve	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
6	Back kick	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
7	Guide sleeve	2Cr13	1Cr18Ni9Ti	1Cr18Ni12Mo2Ti
8	Valve cover	ZG230-450	ZG230-450	ZG230-450
9	The stem	2Cr13	1Cr18Ni9Ti	1Cr18Ni9Ti
10	Spring	50CrVA	50CrVACoated fluorine plastics	50CrVACoated fluorine plastics
11	Adjusting screw	45	2Cr13	2Cr13
12	Valve cap	ZG200-400	ZG200-400	ZG200-400
	Sealing surface material	Surfacing Co based cemented carbide

1, spring full swing safety valve has a simple structure, good sealing performance, open pressure accurately, large discharge capacity, back seat pressure is small, easy to adjust and so on.
2, the nozzle type seat: the seat for a cut of the nozzle seat that reaches the speed of sound at the outlet of the steam flowing through the valve, discharge coefficient, surfacing Stellite seating, erosion abrasion resistance, long service life.
3, thermo elastic disc valve: valve design for the thermal elastic structure, the use of its micro deformation in the medium pressure, improve the sealing ability to overcome the pressure of the safety valve near the pressure under the pressure of the former discharge phenomenon. Valve sealing surface using advanced laser quenching technology, improve the hardness, wear resistance, resistance to resistance.
4, adjusting nut: by adjusting the adjusting nut, adjust the spring compression, so that the valve can be very convenient, very quickly to obtain accurate setting pressure.
5, back pressure adjustment sleeve: adjusting the valve back pressure of the auxiliary mechanism, through the adjustment of the back pressure adjustment, can get the appropriate back seat pressure. Up time, so that the valve back pressure to reduce. Down time, so that the valve back pressure to improve.

Nominal pressure PN（MPa）	Nominal diameter DN（mm）	size（mm）																		weight（kg）
		do	d	D	D1	M	D2	B	Z-Φd	DN	D	D1	M	D2	b	Z-Φd	L	L1	H
16 （Single flange）	15	7	16	95	60	M-24×2	18	20	3-18	-	36	-	M-33×2	-	-	-	45	80	105	4
	20	10	19	95	60	M-33×2	22	20	3-18	-	48	-	M-33×2	-	-	-	45	80	105	4.5
	25	12	23	105	68	M-33×2	28	20	3-18	-	48	-	M-33×2	-	-	-	45	80	105	5.2
16	15	8	15	95	60	M-24×2	18	20	3-18	32	115	-	M-42×2	37	22	4-18	95	100	259	7.8
	20	10	23	98	60	M-24×2	20	20	3-18	40	165	-	M-52×2	47	28	6-26	110	115	266	11.5
	25	12	23	105	68	M-33×2	28	20	3-18	40	165	-	M-52×2	47	28	6-26	110	115	266	12.5
	32	15	25	115	80	M-42×2	37	22	4-18	50	165	115	M-64×3	59	32	6-26	130	1450	335	21.3
	40	20	39	165	115	M-52×2	47	28	6-26	65	200	145	M-80×3	74	40	6-29	150	170	390	35.3
	50	25	48	165	115	M-64×3	59	32	6-26	80	225	170	M-100×3	94	50	6-33	190	210	393	48
32	15	8	17	105	68	M-33×2	29	20	3-18	32	115	80	M-42×2	37	22	4-18	95	100	259	8.1
	20	10	23	105	68	M-33×2	29	20	3-18	40	165	115	M-52×2	47	28	6-26	110	115	266	12
	25	12	23	115	80	M-42×2	36	22	4-18	40	165	115	M-52×2	47	28	6-26	110	115	266	13
	32	14	30	135	95	M-48×2	41	25	4-22	50	165	115	M-64×3	59	32	6-26	130	140	335	22.2
	40	16	38	165	115	M-64×3	57	32	6-26	65	200	145	M-80×3	70	40	6-29	150	170	390	37
	50	20	48	200	145	M-80×3	70	40	6-29	80	225	170	M-100×3	94	50	6-33	190	210	393	55

1, spring full open and close type high pressure safety valve must be installed vertically, and the best installed directly in the container or pipe joints. Joint diameter should not be less than the safety valve inlet diameter.
2, the export of safety valve must be fitted with appropriate expansion joints, in order to prevent the thermal expansion of the exhaust pipe to the safety valve should not be brought about by the thermal stress. Inner diameter of the discharge pipe should be larger than the outlet diameter of the valve, the length is as short as possible to avoid turning. The discharge tube and the expansion joint shall not be on the safety valve and shall be fixed to the building. The center line of the discharge tube and the center line of the valve body is as short as possible. For each safety valve should be installed separately discharge tube.
3, muffler outlet should have enough area to prevent the impact of back pressure on the valve discharge capacity.

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