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Safety relief valve

Spring Loaded Steam Safety Relief Valve

Spring Loaded Steam Safety Relief Valve is used in power plant boilers,pressure containers and temperature reducing devices and other facilities.It serves to prevent pressure from exceeding max. allowed value and ensure the safety of the device during working.Steam Safety Valve sizing and selection acc.to API 520(ASME secⅧ),designed acc.to API 526,test acc.to API 527(ASME PTC 25),flange acc.to ASME B16.5. This valve’s type include A48C Open Bonnet Plain Lever Safety Valve,A48Y High Temperature and High Pressure With Radiator Safety Valve,High Performance Steam Safety Valve which meets the requirement of ASME secⅠ,High Temperature High Pressure Welded Safety Valve.

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Description

Spring Loaded Steam Safety Relief Valve is used in power plant boilers,pressure containers and temperature reducing devices and other facilities.It serves to prevent pressure from exceeding max. allowed value and ensure the safety of the device during working.Steam Safety Valve sizing and selection acc.to API 520(ASME secⅧ),designed acc.to API 526,test acc.to API 527(ASME PTC 25),flange acc.to ASME B16.5. This valve’s type include A48C Open Bonnet Plain Lever Safety Valve,A48Y High Temperature and High Pressure With Radiator Safety Valve,High Performance Steam Safety Valve which meets the requirement of ASME secⅠ,High Temperature High Pressure Welded Safety Valve.


Features:  
Open Bonnet ,with radiator              
Safety Valves/pressure safety valves, angle type
Low/Full lift safety valve for high temperture and high pressure condition 
metal to metal seated,with lever, 
Inlet: Flanged connection acc.to ASME,DIN,JIS,BS etc.
Outlet: Flanged connection acc.to ASME,DIN,JIS,BS etc.


Applications:
Spring Loaded Steam Safety Relief  Valve is applicable as the pressure protecting device in the equipment or pipelines for steam, air,etc.,  which the working medium is ≤350℃.


Standards Compliance:
Design and Manufacture:API RP 520
Face to Face(end to end):API 526
Test and Inspection:API 527


Model/Types:
1.spring loaded low lift open bonnet safety relief valve with lever(A47)
2.spring loaded Full lift open bonnet safety relief valve with lever(A48)

In order to offer a quotation,we need specifications as following:
1.Flange Connection standard
2.Pressure Rating
3.Size
4.Set Pressure
5.Material for Body&Trim (Material for inside parts).
6.Medium
7.Working Temperature


Main property specification

Nominal Pressure PN(Class) 150 300 600
Body strength Ps(Mpa) 3.0 7.5 15
Set pressure Pk(Mpa) 0.1-2 1.6-5 3.2-10
Seal pressure Pm(Mpa) 90%Pk
Reseation pressure Ph(Mpa) ≥90%Pk
Relieving Pressure Pp(Mpa) ≤1.03Pk
Lift height H(mm) ≥1/4 d0
Appropriate temp.
≤350℃
Appropriate Medium Steam

Code of throat diameter

Code

Diameter

Code

Diameter

D

10

L

50

E

13

M

55

F

16

N

60

G

20.5

P

72

H

26

Q

96

J

33

R

115

K

40

T

148

Spring Loaded Steam Safety Relief Valve Materials list

No

Name of part

Materials 

1

Body

WCB

CF8

CF8M

2

Nozzle

2Cr13/ 304

CF8

CF8M

3

Adjusting Ring

2Cr13/ 304

304

316

4

Disc

2Cr13/ 304

304

316

5

Guide sleeve

2Cr13/ 304

304

316

6

Bonnet

WCB

CF8

CF8M

7

Spring

50CrVA

50CrVA coated teflon

50CrVA coated teflon

8

Stem

2Cr13

304

316

9

Adjusting bolt

45

2Cr13

2Cr13

10

Cap

ZG200-400

ZG200-400

ZG200-400

Sealing surface of material "H" depositing D507,  "Y" depositing stellite

Drawing For Example:

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