Stainless Steel High Velocity Relief Valve

Stainless Steel High Velocity Relief Valve

1. Application

The stainless steel high-velocity relief valve generally used in the relief system of the oil tanker and chemical tanker according to the current regulations: IMO and IBC. 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 desk.

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). Adjustable outside opening and closing pressure without exhausting vapor gas.

(2). Full lifting and high flow capacity.

(3). Clearly visible vacuum disc operation.

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

7. Stainless Steel High Velocity Relief Valve in factory: