Taixing Hongyuan Machinery Co., Ltd.

China Manufacturer with main products: CNC Pipe Threading Lathe, Drill Pipe Hardbanding Machine, CNC Spiral Milling Machine, Pressure Vacuum Valve, Vertical Oil-Free Vacuum Pump,...

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Home  >Products Catalog > Pressure vacuum valve (high velocity relief valve) > Marine Fire Protection Valve / Pressure Vacuum Valve

Marine Fire Protection Valve / Pressure Vacuum Valve

FOB Price: 900 - 3000 USD/Set
Min.Order Quantity: 1 Set
Supply Ability: 500 Set/Sets per Month
Shipping: any port
Payment Terms: L/C, T/T
Update Time: 2/24/2017
In Stock
Export Markets: North America, South America, Eastern Europe, Southeast Asia, Africa, Oceania, Mid East, Eastern Asia, Western Europe
Place of Origin: Jiangsu in China
Packaging Details: wooden cases

Quick Details

  • Brand Name: TJ
  • Model Number: DF50-DF250
  • Material: Casting
  • Standard or Nonstandard: Standard

Specifications

High-velocity relief valve (pressure vacuum valve) is the controlled venting system which is necessary for oil tanker and chemical .Tanker. The series of DF-type P/V valve is a new generation production without vibration and anti-collision...The pressure/vacuum valve is installed on the vent pipe of oil tanker and chemicals tanker. It is the only entry and exit for liquid cargo tank. 1. When loading the liquid cargo or ballasting, the pressure valve in the high velocity relief will open, then jet out combustible liquid cargo vapour/air-mixture in liquid cargo tank with the rate of more than 30m/s, and dilute in the air so that it will never drop on the deck. 2. When unloading the liquid cargo, the vacuum valve in the high velocity relief valve will open, then supply air to cabin safely so as to avoid the cabin is over-vacuumed. 3. When the tank navigate on sea, the high velocity valve can automatically adjust the pressure oscillation in the cabin which caused by temperature changes. The experiment of pressure/vacuum valve for cargo ships is done in the lab that is approved by the state organs. It is ratified by China Classification Society and some other classification societies through the following tests according to the above standards: 1. Fire Resistant Test 2. Re-burning Test 3. Frozen Test 4. Corrosion Resistant Test 5. Flowing Test

FEATURES and BENEFITS

1. Reliable operations reduces vapor losses
2. Suaitable and compact design ensures long-term maintenance free life cycle
3. Meet new IMO & MED requirements for cargo vapor flammability - MESG 0.65 mm
4. Non-oscillating performance
5. Full lifting and high flow capacity
6. Variable application for usable installation vent pipe length and flow capacity range
7. No peak pressure over opening pressure
8. No need inside maintenance
9. Available outside inspection, cleaning and maintenance without disassembling
10. Adjustable outside opening and closing pressure without exhausting vapor gas

Main performance parameter

Model

Opening pressure

(kPa)

Rated working pressure

(kPa)

Flow rate

(m3/h)

Outlet air flow velocity of pressure valve(m/s)

Pressure valve

Vacuum valve

Pressure valve

Vacuum valve

Air removal cover

Pressure valve

Vacuum valve

Air removal cover

DF50

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

350

350

250

30

DF65

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

350

350

250

30

DF80

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

600

500

400

30

DF100

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

800

600

400

30

DF125

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

1000

800

600

30

DF150

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

2500

2200

900

30

DF200

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

3000

3000

1200

30

DF250

14.0-21.0

-3.5~-7.0

21.0

-7.0

2.0

3500

3500

1200

30

Remarks:

1.The high-velocity relief valves with different specification have the same diameter and performance parameter;

2.The opening pressure of the vacuum valves are -3.5kpa; the opening pressure of the pressure valves on the oil tank is 14kpa,on the chemical tank is 20kpa.The opening pressure of the pressure may be different, but the differences of opening pressure and flow range if the pressure valves have the same diameter.


Main Partsof the DF-ISO high velocity relief valve

Serial No.

Parts

Quantity

Material

Remarks

1

P-valve base

1

ZG200-400

Cast 20#

2

Water nozzle

1

0Cr18Ni9

SUS304

3

P-valve seat

1

0Cr18Ni9

SUS304

4

P-valve disc

1

0Cr18Ni9

SUS304

5

Matching block

1

0Cr18Ni9

SUS304

6

P-valve body (A) (B)

1

ZG200-400

Cast 20#

7

Conducting machine

1

0Cr18Ni9

SUS304

8

Handle

1

0Cr18Ni9

SUS304

9

V-valve body

1

ZG200-400

Cast 20#

10

Matching block

1

0Cr18Ni9

SUS304

11

V-valve disc

1

0Cr18Ni9

SUS304

12

V-valve seat

1

0Cr18Ni9

SUS304

13

Flame screen

2

00Cr17Ni14Mo2

SUS304

14

Flame screen gland

1

ZG200-400

Cast 20#

15

Nameplate

1

0Cr18Ni9

SUS304

16

Climbing pole

1

0Cr18Ni9

SUS304

17

Gas-freeing cover or V-valve cover

1

ZG200-400

Cast 20#

Remarks : The materials mentioned before are basic materials , ship-owners can choose better materials , Such as SUS304,SUS304L ,SUS316L .

The dimension parameter of the DF-ISO high velocity relief valve

Serial No.

DN

D2

D1

D

L

H

Assembly hole

8

250

320

350

395

460

860

12x22

7

200

268

295

340

455

850

8x18

6

150

202

225

265

385

710

8x18

5

125

178

200

240

380

665

8x18

4

100

148

170

210

285

565

4x18

3

80

128

150

190

285

535

4x18

2

65

110

130

160

255

485

4x14

1

50

90

110

140

255

485

4x14

Remarkss: flange executive standards: GB2501-89, DN50-DN150,nominal pressure is 0.6MPa; DN200, DN250,nominal pressure is 1.6MPa(is equal to ISO2084-1975, ISO2441-1975).

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