Fm Safety Relief Valve Folder Vsr1n2colour Nov05

E N ISO 9001 Certificate : 041004422

Safety Relief Valve VSR1 - Steam and Non Poisoneous / Non Flammable Gases and Vapours VSR2 - Gases,Vapours and Liquids

Relyon us for safety

of your pressure vessel

Full Lift, Spring Loaded, Safety Relief Valve

Salient Features

Model VSR1 Open Bonnet Type Safety Relief Valves are designed for Steam Boiler Service to meet the requirements of the Indian Boiler Regulations. These valves are suitable for Saturated & Superheated steam; Non Poisonous and Non inflammable Gases and Vapours.

4 Valve nozzle and inlet flanges are integral and of forged material to ensure safe operation at the highest pressure conditions. 4 The valve can therefore be offered in Flanged condition to DIN/BS/BS standards without any problem. 4 Butt weld end connections at the valve inlet is possible. 4 Inlet / Outlet and valve body are deliberately oversized compared to the recommendations of API 526 to provide favourable flow characteristics and to keep flow velocities and dynamic pressure losses low. 4 Complete range of Safety Valves are type tested for capacity. 4 Stem is precisely guided by a Piston which slides in the guide bush 4 Piston and Guide Bush provide a large guiding area, which ensures concentric spindle loading and repeatability over extended period of time and numerous operations. 4 Precisely wound Spring made from Chrome Vanadium Steel is specially designed to eliminate eccentric loading and to provide full relieving capacity. 4 Atmospheric cooling of spring and self-compensating thermal design ensures consistent spring compression rate resulting in repeatability of operation at varying temperature conditions. 4 All internal parts are made from corrosion resistant authentic materials with balanced thermal expansion coefficients. 4 Provision of balanced Piston design eliminates the effects of backpressure and achieves low reseat pressure differences (blowdown). This ensures minimal steam wastage. 4 All valves are precisely set on pneumatic test bench and are tested for seat leakage as per API 527.

Model VSR2 is a Closed Bonnet type Valve specially designed for Poisonous and Inflammable Gases, Vapours and Liquids. These valves are available in 12 sizes as per API-526 Orifice sizes (EA-RA) and ANSI flanges covering set pressure ranging from 1.2 bar to 204 bar. A variety of materials are available to suit temperature range up to 550ºC.

NO. 1 2 3 4 5 6 7 8 9 9.1 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 28 29 30 31 32 33 34 35 36 37 38 40 41 42

NAME Nozzle Body Seat Zone Disc Guide Piston Guide Bush Stem Bonnet Bonnet Stud Bonnet Nut Spring Adjusting Screw Lock Nut Cap Adjusting Ring (for VSR) Cooling Spacer (SN 110) Cover Plug Ball Dowel Pin Split Ring Stop Bush Distance Bush Pressure Bush Spring Stop Spring Plate Gasket Lock Nut Split Pin Bush Fork Square Shaft Base Ring Packing Gland Lever Washer Nut Gasket Cap Screw Adjusting Ring Screw

MATERIAL * * X20CrMo171 SS 431 SS 410 Cast Steel SS 410 Carbon Steel A 193B7 A 1942H 50CrV4 IS:320HT2 C20 CS SS 304 A216WCB SS 304 C20 SS SS 9S 20 SS 410 C20 SS 410 A 216WCB C20 Rubber Asbestos SS C20 SS 410 MS C20 Sintered Iron P4 CuZn40A/F60 MS MS C20 Soft Iron C20 SS

29

13

12

32 31

28 11 25 8 10 7 24 23 22 21 20 9 9.1 16 6 5 18 19 4

3 2 1

VSR1

14 42 40,37 Drain G 1/4" only SKB A/B DN 40

VSR1 with adjusting ring

41

Material Specifications : OPEN BONNET Materials for Nozzle (*) Body (*) Temp. Range ºC

: Code 12 : A105 : A216WCB : upto 425

Code 13 A182F22 A217WC6 425 to 550

Code 16 A182 F304/316 A351 CF8 -195 to 300

CLOSED BONNET Code 22 Nozzle : A105 Body : A216WCB Temp. Range ºC : upto 425

Code 17 A182 F316 A216 WCB -60 to 400

Code 23 A182F22 A217WC6/WC9 425 to 550

Code 26 A182 F304/316 A351 CF8/CF8M -195 to 300

Code 27 A182 F316 A216 WCB -60 to 400

API 256 Orifice Code Letters, Smallest Flow Diameter (do) & (Ao) Designation

EA

FA

GA

HA

JA

KA

LA

MA

NA

PA

QA

RA

do mm

24.5

24.5

24.5

26.4

33.8

40.4

51.0

59.0

62.0

80.0

99.0

126.0

Ao mm2

471

471

471

547

897

1282

2043

2734

3019

5027

7699

12467

For inspection dismantling a free space X must remain above the valve.

H1

15 H

Set screw with VSR Drain

Accessories SN 110 A Cooling Spacer is recommended between body and bonnet for temperatures greater than 400ºC Height 'H' increases by 'H1'

S2 S1

API 526 - Seat Designation and ANSI Flange connections Inlet Inch DN

Seat Code

Outlet Inch DN

Pressure Group

1

EA

1 1/2

EA

1 1/2

FA

2 2 2 2 2 2 2 2 2 1/2 2 1/2 2 1/2 2 1/2 3 3 3 3 3 4 4 4 4 4 4 4 4 6 6 6 6 6 6 6 6 6 6 6 6 6 6 8 8 8 8 8

I II II III I I II III I I II III I I II II III I II II III I II II III I II III I II II III I II II III I II III I II III I II

1 1/2

GA

1 1/2 2

HA HA

2 1/2

3

JA

KA

4

LA

4

MA

4

NA

4

PA

6

QA

6

RA

Set Pressure Kg./cm2 Min Max 1.2 46 46 127 1.2 0.5 46 127 1.2 0.6 32 91 1.2 1.2 32 32 92 1.2 23 23 64 1.2 20 20 57 2 16 41 1.3 12.7 12.7 36.3 1.3 12.7 12.7 36.3 1 9 26 0.8 8 20.4 0.7 6.4

46 127 127 204 20 46 127 204 20 32 91 143 20 32 92 92 143 23 64 64 102 20 57 57 92 16 41 92 12.7 36.3 36.3 72.5 12.7 36.3 36.3 70.4 9 26 72 8 20.4 42.2 6.4 16

Centre-to-face dimensions for class mm S1 Outlet S2 Outlet 150 300 150 300 600 900 114 105 105 114 105 105 105 121 152 152 121 152 152 152 124 124 124 162 142 142 171 171 136 136 136 181 181 181 181 184 184 20.3 222 209 209 209 222 228 229 254 241 241 241 241 241

124

124 124 124

124

124 124 124

130

130 130 130

152

162 136 136 156

156 156

178 178

180 180 180 178 178

197 197

197 197

181 181

181 181 225 240 240 240

240 240 240 240

240

Dimension Dimension H H1 1500 105 105

124 124 124

124

124 124 124

156 156 156 156 156 184 190

178 178 197 197 197 225 240 240

305 305 305 305 305 305 305 355 330 330 355 457 305 305 355 355 457 406 406 406 457 406 406 406 533 559 711 711 584 737 737 737 584 737 737 737 991 1067 1067 991 1067 1067 1016 1018

Min. 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 50 70 70 70 70 70 70 70 70 70 70 70 110 110 110 110 110 110 110 110

Weight

Dimension X

kgs 10 10 10 17 10 10 10 17 22 22 22 30 30 30 48 48 65 31 31 49 72 39 54 54 78 59 80 98 91 111 111 141 91 111 111 141 157 167 196 208 216 248 257 268

mm. 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 305 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660 660

Ordering Information

Example for Valve Codification VSR1 150 - 1 1/2 FA - 2 -I - 12 - 110

l

Type Of Valve

l l

Inlet nominal pressure PN l

Inlet nominal size DN API Seat code letter

l l

Outlet nominal size DN Pressure group

l

l

Material specification Standard Accessories

SN-104

Operating Medium and State of Medium (gaseous or liquid) Molecular Weight (gas) / Density (liquid) Set, Design and Operating Pressure (Kg/cm2 , bar) Operating Temperature; ºC Capacity; Kg/hr. Material specifications Inlet / Outlet Size (Applicable for replacement requirements) Applicable accessories

SN-123

SN-124 O-Ring Disc 4

Disc 4 Body Seat 3

Body Seat 3 Cap with Test Gag

Seating for Liquids

Elastic Seat Seal

Accessories Balanced Piston SN 144 Forbes Marshall Safety Relief Valve VSR1/VSR2 can be fitted with a Balanced Piston, SN 144, which makes the valve independent of back pressure. The discharge pipes of Drum and Superheater Safety Relief Valve and the Start Up pipe can therefore be connected to a common silencer. Valves with Balanced Piston work in the same way as those with Bellows. The outer diameter of the Balanced Piston corresponds to the average Seat diameter of the valve. The gap between the outer diameter of the Piston and the inner diameter of the related bore in the Cover is sealed by a Gasket which seals effect of atmospheric backpressure. Closing pressure differences of 5% & lower can be obtained with SN 144 accessory. Model VSR1/VSR2 can be provided with Special Seat for Liquids (SN123) and Elastic Seat Seal (SN 124) for leak tightness on gas service. Valves are also available with Test Gag (SN104) as an optional accessory. Valves can be offered with Inlet Flange connections as per DIN, JIS, BS standard and with Butt Weld End Connection. Steam Jacketing and Silencers also offered on Request.

Subject to change without notice

Forbes Marshall Pvt. Ltd. A-34/35, MIDC, Industrial Estate, 'H' Block, Pimpri, Pune - 411 018. India. Tel.: 91(0)20 - 27442020 Fax: 91(0)20 - 27442040 E-mail: [email protected], [email protected] Branches: Ahmedabad, Alibag, Bangalore, Chennai, Chandigarh, Coimbatore, Delhi, Hyderabad, Jamshedpur, Kolkata, Mumbai, Nagpur, Navi Mumbai, Surat, Vadodara, Visakhapatanam Area Representaives: Bhopal, Indore, Madurai, Pondicherry Website : www.forbesmarshall.com

Rev 0 /06/2005