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Valve Sizing & Selection Guide

This document is a technical data sheet for four pressure safety valves (PSVs) with the following specifications: 1. The PSVs will relieve a gas/vapor at 2832 kg/hr each from a system with a set pressure of 10.5 kg/cm2. 2. Each PSV will be made of various stainless steel and alloy parts to withstand a maximum operating pressure of 90% set pressure and relieving temperature of 218.6°C. 3. Calculations show the required orifice area for one PSV is 5.065 cm2, with an expected maximum flow capacity of 4367.79 kg/hr and cracking pressure of 10.8 kg/

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168 views1 page

Valve Sizing & Selection Guide

This document is a technical data sheet for four pressure safety valves (PSVs) with the following specifications: 1. The PSVs will relieve a gas/vapor at 2832 kg/hr each from a system with a set pressure of 10.5 kg/cm2. 2. Each PSV will be made of various stainless steel and alloy parts to withstand a maximum operating pressure of 90% set pressure and relieving temperature of 218.6°C. 3. Calculations show the required orifice area for one PSV is 5.065 cm2, with an expected maximum flow capacity of 4367.79 kg/hr and cracking pressure of 10.8 kg/

Uploaded by

L KISHORE REDDY
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
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Download as DOCX, PDF, TXT or read online on Scribd
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--Audco Group--

Sizing, Selection & Technical Data Sheet


Customer Name : Universal Valves Date of Calculation : 07/01/19.
Tag Number : PSV-1202A/B/C/D Offer No. :
Item Number : Revision : 0
Qty. Required : 4 No. of Valves to Meet Capacity :

Service Conditions : Valve Design :


1. Fluid : Hydrocarbon Valve : Pressure Safety Valve (PSV)
2. Fluid State : GAS/ VAPOUR Valve Type : Conventional
3. Capacity per Valve : 2832 Kg/hr Nozzle Type : Full Nozzle & Full Lift
4. Molecular Weight : 28.95 Seat Type : Metal To Metal
5. Specific Gravity : 0.999 Seat Tightness : API-527
6. Set Pressure : 10.5 Kg/cm2 g Bonnet Type : Closed
7. Relieving Temp. : 218.6 ºC Cap Type : Bolted
8. Mechanical/ Design Temp. : 234 ºC
9. Superimposed Back Pressure : 0 Kg/cm2 g(Constant)
10. Built-up Back Pressure : 0 Kg/cm2 g
11. Allowable Over Pressure : 21 %
12. Compressibility Factor : 1.00 Materials :
13. Ratio of Specific Heats : 1.40
14. Max.Operating pressure : 90% of set pressure Body : A216 Gr WCB
Bonnet : A216 Gr WCB
Cap : A216 Gr WCB
Spring : CrV-Zinc Plated
Gasket : Graphoil With SS Filler
Nozzle SS-316/CF 8M
Basis of Selection :
Disc SS-316
Code : API 520/API 526 Guide SS-316
Basis of Selection : Exterior Fire Stud A193-B7
Nut A194-2H

Equation :
Accessories :
45. Test Gag

W : Required Flow = 2832 Kg/hr


T : Relieving Temp. = 491.75 K
Z : Compressibility Factor =1
C : Coeff. determined from Cp/Cv = 356.1
Kd : Effective coeff. of discharge = 0.975
P1 : Upstream Relieving Pressure = 1347.26 Kpaa
Kb : Correction due to back pressure =1 Dimensions (Indicative) :
Kc : Combination Correction Fact.- RD = 1 46. A : 130 mm
M : Molecular Weight = 28.95 47. B : 124 mm
A : Calculated Orifice Area = 328.374mm2 48. H : 540 mm
Weight(aprox.) : 35 Kg
End Connection : Flanged
Size : Spring code : Z6E43E103
Spring Range : 9 to 12 Kg/cm2
17. Calculated Orifice Area : 3.284 Cm2
18. Selected Orifice Area-Effec. : 5.065 Cm2
19. Orifice Designation(Letter) : H
20. Maximum Flow Capacity : 4367.79Kg/hr
21. CDTP : 10.8 Kg/Cm2(G)
22. Reaction Force : 61.43 DaN Other Tests and compliance:
23. Noise at30 m :(API 521) 108.101 dBa

Connections:
Inlet : 1.5'' ANSI 300#
Inlet Finish : RF Serreted
Outlet : 3'' ANSI 150#
Outlet Finish : RF Serreted

Notes:

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