Valve manufacturing company
Regulating valve

Regulating valve

ZFQ-1 all weather explosion-proof fire resistant breathing valve

ZFQ-1 all weather explosion-proof fire resistant breathing valve

Introduction: ZFQ-1 explosion-proof fire-proof breathing valve produced by our company is a relatively new product in China. It is a new product with flame arrester and breathing valve. Its new structure is the first in China. It is a necessary safety equipment for petrochemical storage tank. Its biggest advantages are good fire resistance, stable suction performance, simple structure, light weight and convenient maintenance. The product is suitable for storage of class a oil with flash point lower than 28 ℃ and class B oil with flash point lower than 60 ℃, such as gasoline, kerosene, diesel oil, crude oil, toluene, ethanol, aromatics, sulfur and other media tanks. It works normally in the temperature environment of -35 ℃ -60 ℃.

  • Item NO.:

  • Lead Time:

  • Product Orgin:

  • Brand:

  • Shipping Port:

  • Payment:

  • Color:

  • MOQ:

Products Details
1. The product has reasonable structure, beautiful appearance, shell: cast iron, cast steel, stainless steel, cast aluminum alloy, good corrosion resistance.
2. The valve disc and seal ring are made of polytetrafluoroethylene, with good low temperature resistance and antifreeze performance. The resistance layer core is made of stainless steel, with strong corrosion resistance, fire resistance, explosion resistance and other technical performance, which has outstanding advantages.
3. The valve is a ventilation and fire resistance device installed on the fixed roof tank, which can reduce the evaporation loss of storage materials and control the pressure effect of the tank. Its function allows flammable and explosive gases to pass through and has the effect of preventing suffocation on the flame.
4. The valve has the characteristics of large ventilation, small leakage, corrosion resistance and good antifreeze.
5. It can automatically adjust the pressure difference between inside and outside the tank.

6. The fire resisting layer is easy to repair, clean and install. It is unnecessary to dismantle the breathing valve during inspection.


1. The low temperature resistance and antifreeze performance are qualified, and the pressure disc, vacuum valve disc and sealing ring are free of deformation after operating at - 42 ℃ for 2 hours, which fully meets the design requirements.
2. It can be operated continuously for 72 hours at 36 ℃ for 10000 times. The contact surfaces of pressure valve disc, vacuum valve disc and guide rod have no signs of wear and bruise, and the guide rod is sensitive to rise and fall without jamming.
3. The results show that the explosion resistance is qualified, and the fire resistance is successful in 13 consecutive explosion resistance tests.
4. The fire resistance is qualified.

Specification and dimension table:

Installation dimension
D D1 L H H1 n-Ø
DN50  Ø140 Ø110 Ø170 299 157 4-Ø14
DN80 Ø185 Ø150 Ø235 340 178 4-Ø18
DN100 Ø205 Ø170 Ø265 376 185 4-Ø18
DN150 Ø260 Ø225 Ø240 457 210 8-Ø18
DN200 Ø315 Ø280 Ø280 600 243 8-Ø18
DN250 Ø370 Ø335 Ø450 690 283 12-Ø18
Note: the connecting flange meets the requirements of jb78-59 "cast iron flange".

Product structure chart:

Maintenance and repair:
In order to ensure that the performance of the new all-weather explosion-proof breathing valve can be fully used, the breathing valve and fire resistance layer should be inspected within half a year.
1. Check whether the action of pressure valve disc and vacuum valve disc is sensitive, and whether the contact surface of guide rod and valve seal ring is damaged.
2. When re installing the pressure valve disc, make sure that the contact surface is tight and the guide rod rises and falls sensitively.
3. When a new breathing valve is used, the shockproof material of the valve disc must be removed.
4. Check whether the core of fire retardant layer is blocked, deformed, corroded, etc.
5. Check that the blocked fire retardant layer core should be cleaned to ensure that each hole on the core is unblocked, and the deformed and corroded fire retardant layer should be replaced in time.
6. When re installing the core of fire retardant layer, it should be ensured that the combination is tight without air leakage.

Packing & Delivery : 

Packing Details:all by seaworthy plywood case and packed strongly by packing belt as below
Delivery Details:Generally it is 5-10 days if the goods are in stock. or15-30 days if the goods are OEM or not
enough subject to the order quantity. But anyway, normally, we are able to make sure the delivery will not exceed 45days.

Send A Message

If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.

Related Products
Stainless steel self operated pressure regulating valve
V230 self operated pressure regulating valve

Summary: The direct acting self operated pressure (differential pressure) regulating valve (V230 self operated pressure regulating valve) is composed of valve body,valve seat,valve core and other parts.It is an energy-saving product that can automatically adjust the pressure only by the pressure change of the regulated medium without external energy.It can be used for pressure control of non corrosive (maximum temperature 350 ℃) liquid,gas,steam and other media It is widely used in petroleum,chemical industry,metallurgy,light industry and other industrial sectors as well as urban heating and heating system.

Pneumatic film cut-off valve
ZMBP Pneumatic film cut-off valve

ZMBQ pneumatic film cutting valve adopts top guide structure, with multi spring actuator.It has the advantages of compact structure, light weight, sensitive action, S-streamline fluid channel, small pressure drop loss, large valve capacity, convenient disassembly and assembly, etc.

Stainless steel pneumatic diaphragm three way on off valve
Pneumatic diaphragm three-way on/off control valve

Overview of ZX pneumatic diaphragm three way control valve: ZX new series pneumatic diaphragm three-way control valve adopts cylindrical thin-wall window valve core guide,which is different from the bushing guide of plunger valve core.Equipped with multi spring actuator.ZX type pneumatic diaphragm control valve has the advantages of simple structure,light weight,small volume and convenient disassembly.Widely used in accurate control of gas,liquid and other media,process parameters such as pressure,flow,temperature,liquid level to maintain a given value.The utility model is suitable for the occasions where one fluid flows out in two paths through the three-way valve or two fluids are combined into one fluid through the three-way valve. This series of products have two kinds of three-way confluence (ZXQ) and three-way shunt (ZXX). The nominal pressure rating is 1.6, 4.0 and 6.4Mpa, and the diameter range of valve body is DN25-200. The applicable fluid temperature ranges from - 60℃ to + 450℃.The leakage standard is grade IV.There are two kinds of flow characteristics:straight line and parabola.

Three-way regulating valve
ZAZX Electric three way regulating valve

ZAZXE electric three-way regulating valve (sub) flow control valve using cylindrical thin-walled window spool guide.

Small flow regulating valve
Stainless steel explosion proof small flow regulating valve

Small flow control valve is a special control valve for the control of small flow, can control the flow of all kinds of gas, liquid, steam, KV value up to 0.005.Therefore, it can be used in many occasions where accurate control of small flow rate is needed, such as laboratory test equipment, or industrial equipment in mass production, to control the small flow rate of chemicals, dyes, flavors and other additives.

Cast steel angle regulating valve
Pneumatic general Angle regulating valve

HAA ordinary Angle valve is a top guide structure of the regulating valve.The valve body structure is close together, the pressure drop loss is small, the flow is large, the adjustable range is wide, the flow characteristic accuracy is high, the dynamic stability is good, the valve core guides the area to be large, the vibration resistance is good.

Pneumatic piston eccentric rotary valve
ZSRF type pneumatic piston eccentric rotary valve

Eccentric rotary valve is also called CAM deflection valve.

Carbon steel self-contained pressure regulating valve
ZZYP-16B self operated pressure regulating valve

Product introduction: ZZY type self operated pressure regulating valve does not need additional energy. It uses the self energy of the regulated medium and the power source to introduce the actuator to control the position of the valve core, and changes the pressure difference and flow at both ends to stabilize the pressure in front of (or behind) the valve. It has the advantages of sensitive action, good sealing, low power of pressure set point wave and so on. It is widely used in the automatic control of pressure reduction and pressure stabilization of gas, liquid and steam medium.

Cast iron pneumatic double seat control valve
ZXN pneumatic double seat control valve

Product introduction: ZXN new series pneumatic diaphragm double seat control valve adopts double guide structure and multi spring actuator. It has the advantages of compact structure, light weight, sensitive action, large valve capacity, accurate flow characteristics and convenient disassembly. Widely used in accurate control of gas, liquid, steam and other media, process parameters such as pressure, flow, temperature, liquid level to maintain a given value.

Copyright © 2021 Tonglu Yongxin Valve Co.,Ltd.All Rights Reserved. Powered by

IPv6 network supported

IPv6 network supported


Send A Message

Send A Message

    If you are interested in our valves and want to know more details,please leave a message here,we will reply you as soon as we can.