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GRK series vertical hanging cover manhole
GSP-Series Sewage Hole
GTG series transparent holes
GRK series manhole
Breather manhole (flame retardant)
GFQ-2 all-weather breather valve
ZFQ-1 explosion-proof flame retardant breather valve
Large chamber flame retardant breather valve
HXF4 with exhaled connection flame retardant breathing valve
HXF2 with dual connecting pipe flame retardant breather valve
HXF7 with connecting pipe flame retardant single exhaust valve
Teflon lining with double pipe flame arresting breather valve
PTFE lined flame retardant single exhaust valve with connecting pipe
HXF2 type flame retardant breather valve with double connecting pipe
QZF-89 all-weather fire breather valve
HXF5 type flame arresting single exhaust valve
HXF-V Single Exhalation Valve
QZF-2000 all-weather fire breather valve
JAV type insulated jacket breather valve
Pilot Operated Breather Valve

What is the breather valve?

Breather valve refers to a type of valve that not only ensures the isolation of storage tank space from the atmosphere within a certain pressure range, but also allows for communication with the atmosphere (breather) when the pressure exceeds or falls below this range. Its function is to prevent damage to the storage tank due to overpressure or vacuum, while reducing the evaporation loss of the storage liquid. Setting up a breather valve can not only reduce gas emissions inside the tank, thereby reducing atmospheric pollution, but also prevent damage to the storage tank due to overpressure or instability caused by vacuum, playing a certain promoting role in safety and environmental protection.

The breather valve mainly consists of a valve seat, a valve cover, a protective cover, and two sets of opening and closing devices controlled by vacuum and pressure. The opening and closing device includes valve disc, guide rod, spring, spring seat, and sealing ring, etc. When the pressure inside the tank reaches the rated positive exhalation pressure, the pressure valve disc opens and the vapor inside the tank is discharged; When the vacuum degree inside the tank reaches the rated suction negative pressure, the vacuum valve disc opens and air enters.

What is the flame arrester?

A flame arrester is a safety device used to prevent the spread of flames from flammable gases and flammable liquid vapors. A device generally installed in pipelines transporting combustible gases or ventilated tanks to prevent the spread of flames (detonation or detonation) from passing through, consisting of a flame arrester core, flame arrester housing, and accessories.

Flame arresters are also commonly used in pipelines that transport flammable gases. If flammable gas is ignited, the gas flame will spread to the entire pipeline network. To prevent this danger from occurring, flame arresters should also be used. Flame arresters can also be used on pipelines with open flame equipment to prevent flashback accidents. But it cannot prevent the open flame combustion of flammable gases and liquids.

Introduction of Luofu Valve Group

Luofu Valve Group Co., Ltd. was established on April 11, 2005, with a registered capital of 110.88 million yuan. It is a large leading valve enterprise and has successively become a member of the resource market of Sinopec Material and Equipment Company, a first-class material supplier of PetroChina (member of Energy No.1 Network), a network supplier of CNOOC, a first-class network member of Shenhua Group, a qualified supplier of China Chemical Group, and a qualified supplier of Wison Engineering (China) Co., Ltd. And in November 2013, it was approved by the American Society of Mechanical Engineers (ASME) and obtained ASME "UV" certification. Over the years, we have provided various American standard series safety valve products with reliable quality and reasonable prices for domestic industries such as petroleum, petrochemical, coal chemical, and power, which have received high praise from users. At the same time, Luofu Valve Group has established good cooperative relationships with relevant units such as Sinopec Luoyang Petrochemical Engineering Company, PetroChina East China Survey and Design Institute, China Tianchen Engineering Co., Ltd., China Chengda Engineering Company, Hualu Engineering Technology Co., Ltd., Donghua Engineering Technology Co., Ltd., Daqing Petrochemical Design Institute, Shengli Oilfield Design Institute, Fushun Petrochemical Design Institute, and has signed strategic cooperation framework agreements with PetroChina, Sinopec, and subsidiary units of CNOOC for refining projects and ethylene projects.

Why choose us?

Luofu Valve Group Co., Ltd., formerly known as Luofu Boiler Parts Factory, was established in 1984. This is the first safety valve manufacturer in China to obtain a special equipment manufacturing license, and also the earliest enterprise to obtain the qualification certification for breather valve manufacturing.

In addition to producing various types of breather valves according to national standards, we also produce American standard breather valves. We can also customize various non-standard breather valves for customers.

Luofu Valve Group Co., Ltd. is a high-end breather valve manufacturer and supplier in China, with strong strength and first-class technology. The product quality strictly follows the ISO9001 standard, with timely delivery and guaranteed after-sales service. As long as you have a demand for breather valves, we can provide you with high-quality products and services.