Pressure Relief Valve: 150#, Full lift safety valve type, Flanged end, cast steel body
Pressure Relief Valve: 150#,
Full lift safety valve type,
Flanged end,
cast steel body,
manufactured to API 520 standard
PRVS FOR P305A/B
Ø Body Material: Carbon Steel
Ø Trim material: stainless steel
Ø Inlet rating and connection – 2”X150#
Ø Outlet rating and connection – 2”X150#
Ø Orifice area – F
Ø Operating pressure – 10Kg/cm2
Ø Set pressure – 15Kg/cm2
Ø Fluid – LUBE OIL
Ø Temperature: 45oC
Pressure Relief Valve, Body Material: Carbon Steel, Trim material: stainless steel
The valve instantly opens when the pressure in the pipeline exceeds the preset safe level, thus relieving excessive pressure from the pipeline. When the pressure returns to normal, the valve closes slowly, at an adjustable speed. The valves also can be used to sustain upstream pressure to a preset pressure value.
| Explanation of materials for main parts |
| NO. | Name of part | A21H-C/A21F KA21Y-C Materials | A21W-P/A21F-P KA21Y-P Materials | A21Y-R Materials |
| 1 | Union | 20 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 2 | Union nut | 35 | 2Cr13 | 1Cr18Ni9Ti |
| 3 | Nozzle | 35 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 4 | Body | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 5 | Disc | 2Cr13/2Cr13+PTFE | 1Cr18Ni9Ti/1Cr18nI9Ti+PTFE | 1Cr18Ni12Mo2Ti |
| 6 | Spring washer | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 7 | Spring | 50CrVA | 50CrVA Coated Teflon | 50CrVA Coated Teflon |
| 8 | Locking nut | Q235-A | 2Cr13 | 1Cr18Ni9Ti |
| 9 | Spring guide | 2Cr13 | 1Cr18Ni9Ti | 1Cr18Ni12Mo2Ti |
| 10 | Adjusting nut | Q235-A | 2Cr13 | 1Cr18Ni12Mo2Ti |
| | Sealing surface of material | "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body |
| Dimensions (mm) |
| Type | (DN) | do | d | Do | M | d1 | D1 | L | L1 | H |
| Nominal diameter |
| KA21Y-16C A21H-16C A21H-40 | 15 | 12 | 15 | 20 | M27 1.5 | G1/2" | 30 | 35 | 76 | 66 |
| A21W-16P A21W-40P KA21Y-16P | 20 | 16 | 20 | 25 | M33 1.5 | G3/4" | 34 | 40 | 87 | 68 |
| | 25 | 18 | 25 | 31 | M39 1.5 | G1" | 40 | 50 | 100 | 105 |
| A21Y-64 | 15 | 10 | 15 | 25 | M39 1.5 | G1" | 44 | 50 | 100 | 66 |
| A21Y-64P A21Y-100 | 20 | 10 | 20 | 31 | M39 1.5 | G1" | 44 | 50 | 100 | 68 |
| A21Y-100P | 25 | 12 | 25 | 31 | M39 1.5 | G1" | 44 | 50 | 100 | 105 |
| A21W-160 | 15 | 8 | 20 | / | M24 2 | G1" | 44 | 50 | 100 | 261 |
| /160P | 20 | 8 | 25 | / | M33 2 | G1" | 44 | 50 | 100 | 261 |
| | 25 | 8 | 28 | / | M36 2 | G1" | 44 | 50 | 100 | 285 |
| Explanation of materials for main parts |
| NO. | Name of part | A28H Materials | A28Y-P Materials | A28Y-R8 Materials |
| 1 | Body | HT200 | ZG1Cr18Ni9Ti | CF8M |
| 2 | Nozzle | 35 | ZG1Cr18Ni9Ti | CF8M |
| 3 | Adjusting ring | 2Cr13 | 1Cr18Ni9Ti | 316 |
| 4 | Disc | 2Cr13 | 1Cr18Ni9Ti | 316 |
| 5 | Spring | 50CrVA | 50CrVA Coated Teflon | 50CrVA Coated Teflon |
| 6 | Stem | 2Cr13 | 2Cr13 | 316 |
| 7 | Adjusting bolt | 45 | 2Cr13 | 316 |
| 8 | Cap | ZG200-400 | ZG200-400 | CF8M |
| | Sealing surface of material | D507 | Co |
| Depositing D507 | Depositing stellite |
| 10 | Adjusting nut | Q235-A | 2Cr13 | 1Cr18Ni12Mo2Ti |
| | Sealing surface of material | "Y" Co Depositing stellite, "H" D507 Depositing D507, "W" body |
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150# Full lift safety valve type Pressure Reducing Valves with Flanged end cast steel body Images
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