High Velocity Relief Valve

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.

valve 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)

Serial No.	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

6. IACS Certificate: ABS, BV, CCS, RINA, LR.

7. High Velocity Relief Valve in factory