Marine Cast Steel High Velocity Relief Valve
1. Application
Marine cast steel high velocity relief valve is generally used in the relief system of the oil tanker and chemical tanker. The purpose of the high velocity valve is to provide automatic control of pressure differentials during liquid cargo ship loading, voyage, ballasting and de-ballasting without any manual operation, also, it provides auto-protection against fire and explosions on deck.
2. Material
valve body: cast steel
valve seat: stainless steel 0Cr18Ni9 SUS304
flame screen: stainless steel 00Cr17Ni14Mo2 SU316L
remarks: 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 to 14Kpa; (2) chemical tanker: -3.5Kpa to 20Kpa.
4. Features:
(1). No peak pressure over opening pressure.
(2). Full lifting and high flow capacity.
(3). High quality.
5. Specification(mm)
|
DN |
D2 |
D1 |
D |
L |
H |
Flange Hole |
|
250 |
320 |
350 |
395 |
460 |
860 |
12 x φ22 |
|
200 |
268 |
295 |
340 |
455 |
850 |
8 x φ18 |
|
150 |
202 |
225 |
265 |
385 |
710 |
8 x φ18 |
|
125 |
178 |
200 |
240 |
380 |
665 |
8 x φ18 |
|
100 |
148 |
170 |
210 |
285 |
565 |
4 x φ18 |
|
80 |
128 |
150 |
190 |
285 |
535 |
4 x φ18 |
|
65 |
110 |
130 |
160 |
255 |
485 |
4 x φ14 |
|
50 |
90 |
110 |
140 |
255 |
485 |
4 x φ14 |
6. IACS Certificate: ABS, BV, CCS, LR, RINA
7. Marine Cast Steel High Velocity Relief Valve in factory:
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