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Pressure Relief Valve Series AK-33

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HIGH LIFT & HIGH CAPACITY, FULL NOZZLE CONSTRUCTION, DIRECT SPRING LOADED, METAL TO METAL SEAT, SIZE 1” TO 8” (‘D’ TO ‘T’ ORIFICE IN ACCORDANCE WITH API-526) FLANGED END ANSI 150# TO 2500# (TEMP.- 196ºC TO +530ºC SAFETY/PRESSURE RELIEF VALVE. SET PRESSURE RANGE 1 BAR TO 414 BAR

DESIGN FEATURE

  • Face to face dimension according to API 526
  • Adjusting and reaction rings
  • Screwed full nozzle
  • Flanges according to ANSI B 16.5
  • Sizing & selection of safety relief valve in accordance with API 520, Part-I (Using API-520 coefcient & API-526 effective discharge area)

CONSTRUCTION

       Body Materials
  • Carbon steel code 3336
  • Stainless steel code 3356
  • Cr Mo steel code 3366
  • Low temperature steel code 3376 Special materials included compliance to standard NACE MRO175

ACCESSORIES / OPTIONS

  • Face to face dimension according to API 526
  • Adjusting and reaction rings
  • Screwed full nozzle
  • Flanges according to ANSI B 16.5
  • Sizing & selection of safety relief valve in accordance with API 520, Part-I (Using API-520 coefcient & API-526 effective discharge area)

PART LIST

PRESSURE RELIEF VALVES FLANGED TYPE SERIES : AK – 33
PART LIST
PART LIST AK-3336 CARBON STEEL AK-3356 STAINLESS STEEL CORROSIVE SERVICE AK-3366 CR MO STEEL AK-3376 LOW TEMPERATURE
PART NO DESCRIPTION TEMP-29oC TO 427oC TEMP-196oC TO 530oC TEMP-29oC TO 538oC TEMP-30oC TO 345oC
01 Body A 216 GR WCB A 351 GR CF8M A 217 GR WC6 A 352 GR LCB
02 Bonnet A 216 GR WCB A 351 GR CF8M A 217 GR WC6 A 352 GR LCB
03 Cap A 216 GR WCB A 351 GR CF8M A 217 GR WC6 A 352 GR LCB
04(R) Nozzle SS-316 / CF8M SS-316 / CF8M SS-316 / CF8M SS-316 / CF8M
05(R) Disc SS-316 SS-316 SS-316 SS-316
06 Adj. Ring A 351 GR CF8M A 351 GR CF8M A 351 GR CF8M A 351 GR CF8M
07 Adj. Ring Pin SS-304 SS-304 SS-304 SS-304
08 Disc Holder / Piston SS -304/351 GR CF8 SS -304/351 GR CF8 SS -304/351 GR CF8 SS -304/351 GR CF8
 09 Guide SS-316/A 351 GR CF8M  SS-316/A 351 GR CF8M  SS-316/A 351 GR CF8M  SS-316/A 351 GR CF8M
 10 Ball  SS – 304  SS – 304  SS – 304  SS – 304
 11 Spindle  SS – 304  SS – 304  SS – 304  SS – 304
 12 Body – Bonnet Bolting Stud  A 193 GR B7  A 193 GR B8  A 193 GR B7  A 193 GR B7
 13 Body – Bonnet Bolting Nut  A 194 GR 2H  A 194 GR 8H  A 194 GR 2H  A 197 GR 2H
 15 (R)  Spring ACCORDING TO MEDIUM AND TEMPERATURE
 16  Spring Washer C. S. SS-304  SS-304  C. S.
 17  Adj. Screw  SS-304  SS-304  SS-304  SS-304
 18  Lock Nut  SS-304  SS-304  SS-304  SS-304
 19/20  Cap – Bonnet Fastener  CARBON STEEL  SS-304  CARBON STEEL  CARBON STEEL
 21  Set Screw Gasket  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER
 22  Guide Gasket  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER
 23 (R)  Cap Gasket  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER
 24  Drain Plug  SS-304  SS-304  SS-304  SS-304
 26  Cap Plug  C.S.  SS-304  C.S.  C.S.
 27 (R)  Plug Gasket  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER
 30  Test Gag  C.S.  SS-304  C.S.  C.S.
 41  Lever Assembly  A 479 410  A 479 304  A 479 410  A 479 410
 60 (R)  Bellow  SS-316 L  SS-316 L  SS-316 L  SS-316 L
 61 (R)  Bellow Gasket  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER  GRAPHOIL WITH SS FILLER
(R) : Recommended Spares Other materials on Request  Recommended Spring Materials

 COLD DIFFERENTIAL TEST PRESSURE (CDTP:)

  • Actual service conditions are different from the test conditions, to compensate this effect CDTP is specied for adjusting set pressure at test bench.
  • The CDTP for conventional valve with superimposed constant back pressure, CDTP = (Set pressure-Back pressure) (1+Temp Correction factor)
  • The temperature correction factor at reliving temp are (+67 to +120=1%) (+121 to 200 =+2%)  +201 to 351=3%) (+316 to 430′ =+4%) (+431′ to 450′ =+5%)
  • The spring design is suitable to modify the set pressure within ±10% of the original set pressure. For other modications, consult to work.
  Material  Temp Range (OC)
1. Carbon Steel (C.S. with Plating)
2. High Temp Alloy Steel (HTAS)
a. 50 CrV4 (Chrome Alloy)
b. Tungsten Alloy
c. Inconel
3. Low Temp Alloy Steel (SS)		 -59 to 232
-59 to 350
-59 to 538
-196 to 538
-196 to 260

CODIFICATION NUMBERING SYSTEM

PRESSURE RELIEF VALVES FLANGED TYPE SERIES : AK – 33
CODIFICATION NUMBERING SYSTEM

SIZES

114PRESSURE RELIEF VALVES FLANGED TYPE SERIES : AK – 33
SIZES
 ORIFICE  FLANGES ANSI RF * MAX SET
PRESSURE AT
38o C
(BAR-g)		 DIMENSIONS APPROX
WEIGHT
(KG)
 API – 526 ND in.
Inlet x Outlet		  CLASS ANSI ±3
A
mm		 ±3
B
mm		 ±3
E
mm		 ±10
H
mm
 DESIGNATION EFFECTIVE AREA
(cm2 )
Sq In		 INLET OUTLET
 D (0.71)
0.11		  1″ x 2″ 150 150 19.6 105 114 32.5 420 18
300 150 19.6 105 114 32.5 420 18
300 150 51 105 114 32.5 420 18
600 150 102 105 114 32.5 420 18
 1.5″ x 2″ 900 300 153 105 140 40.5 512 30
1500 300 255 105 140 40.5 512 30
 1.5″ x 3″ 2500 300 414 140 178 60 640 42
 E (1.26)
0.196		  1″ x 2″ 150 150 19.6 105 114 32.5 420 18
300 150 19.6 105 114 32.5 420 18
300 150 51 105 114 32.5 420 18
600 150 102 105 114 32.5 420 18
 1.5″ x 2″ 900 300 153 105 140 40.5 512 30
1500 300 255 105 140 40.5 512 30
 1.5″ x 3″ 2500 300 414 140 178 60 640 42
 F (1.98)
0.307		  1″ x 2″ 150 150 19.6 124 121 34 530 30
300 150 19.6 124 121 34 530 30
300 150 51 124 152 38 530 36
600 150 102 124 152 38 530 36
 1.5″ x 3″ 900 300 153 124 165 47 554 48
1500 300 255 124 165 47 554 48
2500 300 345 140 178 60 640 60
 G (3.24)
0.503		 1.5″ x 3″ 150 150 19.6 124 121 34 540 30
300 150 19.6 124 121 34 540 30
300 150 51 124 152 38 540 36
600 150 102 124 152 38 540 36
900 300 153 124 165 47 650 42
 2″ x 3″ 1500 300 255 156 171 64 740 78
2500 300 255 156 171 64 740 84
H (5.06)
0.785		 1.5″ x 3″ 150 150 19.6 130 124 36 540 35
300 150 19.6 130 124 36 540 35
2″ x 3″ 300 150 51 130 124 36 540 35
600 150 102 155 162 42 700 48
900 150 153 155 162 63 730 78
1500 300 190 155 162 63 730 82
J (8.3)
1.287		 2″ x 3″ 150 150 19.6 137 124 36 559 35
300 150 19.6 137 124 36 559 35
3″ x 4″ 300 150 51 184 143 47 725 58
600 150 102 184 181 49 750 98
900 150 153 184 181 53 970 132
1500 300 186 184 181 67 771 145
K (11.86)
1.838		 3″ x 4″ 150 150 19.6 156 162 43.5 700 78
300 150 19.6 156 162 43.5 700 78
300 150 51 156 162 43.5 700 78
600 150 102 184 181 53 970 130
3″ x 6″ 900 150 153 198 216 54 1160 156
1500 300 153 198 216 67 1160 210
L (18.41)
2.853		 3″ x 4″ 150 150 19.6 156 165 43.5 700 78
300 150 19.6 156 165 43.5 700 78
4″ x 6″ 300 150 51 179 181 44 990 130
600 150 69 179 203 52.5 1000 180
900 150 103 197 222 61 1160 210
1500 150 103 197 222 71 1160 222
M (23.2)
3.6		 4″ x 6″ 150 150 19.6 178 184 44 990 108
300 150 19.6 178 184 44 990 130
300 150 51 178 184 44 990 130
600 150 76 178 203 52.5 1000 180
900 150 76 197 222 61 1160 210
N (28)
4.34		 4″ x 6″ 150 150 19.6 197 210 46 1010 90
300 150 19.6 197 210 46 1010 130
300 150 51 197 210 46 1010 130
600 150 69 197 222 61 1010 205
900 150 69 197 222 61 1010 210
P (41.2)
6.38		 4″ x 6″ 150 150 19.6 181 229 46 1000 136
300 150 19.6 181 229 46 1000 132
300 150 36 225 254 46.5 1060 180
600 150 69 225 254 60 1200 264
900 150 69 225 254 60 1200 270
Q (103)
16		 6″ x 8″ 150 150 11.5 240 241 43.5 1100 192
300 150 11.5 240 241 54 1120 264
300 150 21 240 241 54 1120 264
600 150 42 240 241 67.5 1133 288
R (103)
16		 6″ x 8″ 150 150 7 240 241 43.5 1100 198
300 150 7 240 241 54 1120 270
6″ x 10″ 300 150 16 240 241 54 1205 282
600 150 21 240 241 63 1205 306
T (168)
26.00		 8″ x 10″ 150 150 4.5 276 279 47 1346 408
300 150 8 276 279 60 1400 436
300 150 21 276 279 60 1400 426