High Velocity Relief Valve
1. Application
The High Velocity Relief Valve is usually used in oil tanker and chemical tanker,it designs to provide automatic control of pressure differentials during liquid cargo ship loading,voyage,ballasting and de-ballasting without any manual operation.In addition,it provides auto-protection against fire and explosions on desk.
2. Materialvalve body:cast steel
valve seat:0Cr18Ni9, SUS304
flame screen:00Cr17Ni14Mo2, SUS316L
the materials mentioned before are basic materials, ship-owners can choose better materials, such as SUS304, SUS304L, SUS316L.
3. Nominal Size & Pressure
Diameter：DN50—DN250
Pressure:(1) oil tanker:-3.5Kpa—14Kpa; (2) chemical tanker:-3.5Kpa—20Kpa.
4. Features
(1). Meet new IMO & MED requirements for cargo vapor flammability - MESG 0.9 & 0.65 mm.
(2). Variable application for usable installation vent pipe length and flow capacity range.
(3). High quality and good service.
5. Specification(mm)
|
DN |
D2 |
D1 |
D |
L |
H |
Flange Hole |
|
|
1 |
50 |
90 |
110 |
140 |
255 |
485 |
4xφ14 |
|
2 |
65 |
110 |
130 |
160 |
255 |
485 |
4xφ14 |
|
3 |
80 |
128 |
150 |
190 |
285 |
535 |
4xφ18 |
|
4 |
100 |
148 |
170 |
210 |
285 |
565 |
4xφ18 |
|
5 |
125 |
178 |
200 |
240 |
380 |
665 |
8xφ18 |
|
6 |
150 |
202 |
225 |
265 |
385 |
710 |
8xφ18 |
|
7 |
200 |
268 |
295 |
340 |
455 |
850 |
8xφ18 |
|
8 |
250 |
320 |
350 |
395 |
460 |
860 |
12xφ22 |
7. High Velocity Relief Valve in factory
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