Qzf-89 All-Day Fire and Explosion-Proof Breathing Valve

• Media: Water
• Standard: Water Vapour Oil
• Certification: CCC, RoHS, ISO, CE
• Temperature: High Temperature
• Connection: Flange
• Valve Seat: Double-Seat
• Model NO.: QZF-89
• Structure: Piston
• Material: Cast Iron
• Transport Package: Wooden Box
• Specification: DN15-DN800
• Trademark: XC
• Origin: China
• HS Code: 8421219990
• Production Capacity: 9999

Product Description

QZF-89 all-day fire and explosion-proof breathing valve Performance and characteristics:

The ventilation device installed on the fixed roof tank plays the role of reducing the evaporation loss of oil products, controlling the pressure of the storage tank and preventing the introduction of external flame. The all-day fireproof and explosion-proof breathing valve has the characteristics of large ventilation volume, small leakage, corrosion resistance, etc., and has an electrostatic grounding line, so that the valve and the tank to maintain equal potential. The all-weather fireproof and explosion-proof breathing valve has antifreeze performance and is suitable for cold areas.

Breathing valve model: QZF-89	Nominal diameter of breathing valve: 50MM-300MM	Breathing valve operating pressure: 0.6MPA-1.6MPA
Breathing valve connection mode: flange connection	Breathing valve form: automatic	The main function of the breathing valve: to prevent the pipeline from producing negative pressure
Breathing valve use medium: kerosene, diesel, a stupid	Breather valve material: cast steel stainless steel	Breathing valve standard: mechanical standard or customized non-standard

QZF-89 all-day fire and explosion-proof breathing valve main technical parameters:

Positive pressure	353Pa (36mmH2O), 980.7Pa(100mmH2O)
Negative pressure	294.2 Pa (36 mmh2o)

QZF-89 all-day fire and explosion-proof breathing valve parts Materials:

Valve 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, tetrafluoroPTFE
Ambient temperature ºC	- 30 ~ 60

QZF-89 all-day fire and explosion-proof breathing valve national standard flange connection dimensions:

GB, JB

Specs	Mounting dimensions (mm)
	D1	D	L	H	N-d
DN50	Ø 110	Ø 140	362	360	4 x 14
DN80	Ø 170	Ø 185	513	445	4 x 18
DN100	Ø 170	Ø 205	513	445	4 x 16
DN150	Ø 225	Ø 260	640	610	8 x 18
DN200	Ø 280	Ø 315	770	seven hundred	8 x 18
DN250	Ø 335	Ø 370	918	828	12 x 18
DN300	Ø 395	Ø 435	1050	910	12 x 23

QZF-89 all-weather fire and explosion-proof breathing valve American standard flange connection size:

ANSI, API, ASME available to JIS standards

Specifications	Mounting dimensions (mm)
	D1	D	L	H	N-d
2. ""	120.5	152	362	360	4 x 14
3"	152.5	190	513	445	4 x 18
4"	190.5	229	513	445	4 x 16
6"	241.5	254	640	610	8 x 18
8"	298.5	343	770	seven hundred	8 x 18
10"	362	406	918	828	12 x 18
12"	483	432	1050	910	12 x 23