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A42Y spring full open safety valve

A42Y spring full open safety valve

Product introduction: A42Y spring full open closed safety valve: A42Y spring full open closed safety valve is suitable for equipment and pipelines with working temperature ≤ 300 ℃ air, petroleum gas, liquid and other media. Stainless steel spring full open closed safety valve is suitable for equipment and pipeline with corrosive medium working temperature ≤ 200 ℃ as overpressure protection device.The connecting flange standard of spring full open safety valve is in accordance with JB/T-94 Series 1. 4 MPa according to JB/T-94 Series 2.

  • Item NO.:

    XUVAL77-41
  • Lead Time:

    45Days
  • Product Orgin:

    CHINA
  • Brand:

    XUVAL
  • Shipping Port:

    Shanghai
  • Payment:

    100%TT
  • Color:

    Blue
  • MOQ:

    10
Products Details

A42Y spring full open safety valve

Working principle of spring type full open safety valve:

Safety valve is a safety device to prevent pressure equipment and vessels from bursting due to pressure rise or pressure inside the vessel exceeding the limit. Safety valve is a safety device widely used in pressure vessel, boiler, pressure pipeline and other pressure systems to ensure the safe operation of pressure system. When the pressure of the vessel exceeds the design requirements, the safety valve will open automatically to discharge the gas and reduce the overpressure in the vessel to prevent the vessel or pipeline from being damaged. When the pressure in the container drops to the normal operating pressure, it will automatically close to avoid the waste and production interruption caused by the overpressure of the container. The safety valve is mainly composed of seat, disc (spool) and loading mechanism. Some seats are integral with the valve body, and some are assembled with the valve body, which is connected with the equipment. The disc is often attached with a stem, which fastens on the seat. Above the valve disc is the loading mechanism, the size of the load can be adjusted. When the pressure in the equipment is within a certain working pressure range, the force of the internal medium acting on the valve disc is less than the force added on the valve by the loading mechanism. The difference between the two constitutes the sealing force between the valve disc and the valve seat, so that the valve disc presses the valve seat tightly and the medium of the equipment cannot be discharged. When the pressure in the equipment exceeds the specified working pressure and reaches the opening pressure of the safety valve, the force exerted by the internal medium on the alarm valve is greater than the force exerted by the loading mechanism, so the valve disc leaves the valve seat and the safety valve opens. The medium in the equipment is discharged through the valve seat. If the displacement of the safety valve is greater than the safety relief capacity of the equipment, the pressure in the equipment gradually decreases, And after a short time of exhaust, the pressure will drop back to the normal working pressure. At this time, the force exerted by the internal pressure on the valve disc is less than that exerted by the loading mechanism, and the valve disc presses the valve seat tightly. The medium stops discharging, and the equipment continues to operate under normal working pressure. Therefore, the safety valve is closed or opened by itself through the fluctuation of the medium force on the valve disc and the force of the loading mechanism, so as to prevent the equipment from overpressure.


Full lift safety valve model: A42Y
Full lift safety valve nominal diameter: 20mm-400mm
Service pressure of full lift safety valve: 1.6Mpa 10.0MPa
Connection mode of full lift safety valve: flange connection
Full open safety valve type: spring type
Main function of full open safety valve: pressure relief and protection
Full open safety valve using medium: liquid, gas
Full open safety valve material: cast steel, stainless steel, molybdenum stee
Full open safety valve standard: standard of Ministry of machinery or customized non-standard


Materials of main parts of spring full open safety valve:

NO Part name
AH42F-C  A42F-C
1 Seat 2Cr13
2 Body WCB
3 Adjusting ring
2Cr13
4 Recoil plate
2Cr13
5 Disc 2Cr13+PTFE
6 Guide sleeve
2Cr13
7 Cover ZG230-450
8 Spring 50CrVA
9 Stem 2Cr13
10 Adjusting screw
45
11 Valve cap
ZG200-400


Overall dimension and connection dimension of spring full open safety valve:



Model
Nominal diameter
DO D K g g1 b f f1  Z-∅d DN D1 K1 g2 b1 f Z1-∅d L L1 ≈H

A42H-16C

A42F-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

A42H-25

A42F-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

A42H-40

A42F-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 - 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



Packing & Delivery : 

Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below
Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not
enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.




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