High Velocity Relief Valve with gas freeing cover

High Velocity Relief Valve with gas freeing cover

1. Application

High velocity relief valve with gas freeing cover has been widely used in oil and chemical tanker ventilation systems. Its function is to ensure the safety of cargo tank structure and prevent overpressure or pressure loss; And control the fire, the danger of explosion and the safe discharge of the toxic cargo steam.

2. Material

valve body: cast steel
valve seat: stainless steel 0Cr18Ni9  SUS304
flame screen: stainless steel 00Cr17Ni14Mo2  SUS316L

We can according to customer demand for customized the material.

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). Meet new IMO & MED requirements for cargo vapor flammability - MESG 0.9 & 0.65 mm.

(3). Variable application for usable installation vent pipe length and flow capacity range.

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: BV, RINA, LR,ABS, CCS.

7. The product in factory