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QZF-89 All Weather Fire-retardant Breathing Valve

Product overview

Product model: QZF-89
Valve Diameter: DN50-300mm, NPS2"~12"
Nominal pressure: PN1.0MPa
Explosion-proof grade: BS 5501: IIA, IIB, IIC
Main material: carbon steel WCB, stainless steel 304, 316, aluminum alloy
Positive pressure valve disc material: stainless steel 304, 316, aluminum alloy
Negative pressure valve disc material: stainless steel 304, 316, PTFE
Flange standard: ANSI, API, ASME, can be JIS standard

QZF-89 All Weather Fire-retardant Breathing Valve product details

QZF-89 All Weather Fire-retardant Breathing Valve performance and features

QZF-89 All Weather Fire-retardant Breathing Valve produced and sold by Baigang valve group is installed on the fixed roof tank ventilation device, play a reduction of oil evaporation loss, control of tank pressure and prevent the introduction of the role of the outside flame. The valve has a large amount of ventilation, leakage, corrosion resistance and other characteristics, and electrostatic grounding line so that the valve and the tank to maintain equipotential. The valve has antifreeze properties, suitable for cold areas.


QZF-89 All Weather Fire-retardant Breathing Valve main technical parameters

Positive pressure

353 Pa (36 mmH2O), 980.7 Pa (100 mmH2O)

Negative pressure

294.2 Pa (36 mmH2O)


QZF-89 All Weather Fire-retardant Breathing Valve parts and components of the material

Body material

Carbon Steel WCB, Stainless Steel 304,316, Aluminum Alloy

Positive pressure valve disc material

Stainless steel 304,316, aluminum alloy

Negative pressure valve disc material

Stainless steel 304,316, PTFE PTFE

Ambient temperature ℃

-30 ~ 60


QZF-89 All Weather Fire-retardant Breathing Valve GB flange connection Dimensions: GB, JB

specification

Installation size (mm)

D1

D

L

H

Nd

DN50

Ø110

Ø140

362

360

4 × 14

DN80

Ø170

Ø185

513

445

4 × 18

DN100

Ø170

Ø205

513

445

4 × 16

DN150

Ø225

Ø260

640

610

8 × 18

DN200

Ø280

Ø315

770

700

8 × 18

DN250

Ø335

Ø370

918

828

12 × 18

DN300

Ø395

Ø435

1050

910

12 × 23


 
QZF-89 All Weather Fire-retardant Breathing Valve API flange connection size: ANSI, API, ASME for JIS standards

specification

Installation size (mm)

D1

D

L

H

Nd

2

120.5

152

362

360

4 × 14

3

152.5

190

513

445

4 × 18

4

190.5

229

513

445

4 × 16

6

241.5

254

640

610

8 × 18

8

298.5

343

770

700

8 × 18

10

362

406

918

828

12 × 18

12

483

432

1050

910

12 × 23



Reminder:

All text, data and pictures in this article are for reference only.To see more details of the QZF-89 All Weather Fire-retardant Breathing Valve performance parameters, structural dimension parameters, pricing, etc., or to request high quality printing samples, please Contact us.

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