Your Professional Gas Valve Manufacturer!
Zhejiang Bozheng Copper Co., Ltd. is located in the "the valve capital of China"-Yuhuan (a city by the East China Sea in the Yangtze River Delta economic circle). Founded in 1998, the company is a comprehensive enterprise integrating research and development, design, manufacturing, sales and service. After decades of exploration and development, "Bozheng" has become a high-quality brand in the domestic valve industry.
Quality Control
We inspect their corrosion resistance and mechanical properties with other equipment. Throughout the production process, we strictly control the processing accuracy and surface quality of our products.
Patent Certifications
Rich Experience in Valve Industry; ISO9001 Quality Management System Certification.
Efficient Production
From initially producing over 1,000 products per day to now exceeding 5,000 products per day, with an average of one product completed every 15 seconds.
Wide Range of Applications
Our products are widely used in construction, plumbing, gas, chemical, petroleum, electric power and many other industries.
What is a Gas Valve?
The gas valve is the temperature and gas control found on a natural gas water heater or a LP water heater. This valve is responsible for opening and closing the incoming gas to the water heater based on the temperature setting. Gas valves play a crucial role in controlling fuel flow to gas-powered appliances, ensuring safe and efficient operation.
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Brass Y-type Gas Valve With Inner Teeth And Three ForksOur Brass Y-Type Gas Valve is designed with precision engineering to ensure optimal gas flow control. The Y-type configuration allows for efficient gas distribution and minimal pressure loss, makingread more -
![External Butterfly Handle Gas Valve]()
External Butterfly Handle Gas ValveOur External Butterfly Handle Gas Valve features a uniquely designed butterfly handle that allows for smooth and precise control over gas flow. The ergonomic handle design ensures easy operation andread more
Importance of Gas Valves in Gas Systems
Gas valves are critical in ensuring the safety and efficiency of gas systems. The following are some of the reasons why gas valves are vital in gas systems:
Versatility
Gas valves can be used in a variety of applications, from home heating systems to industrial processes, making them a versatile and valuable component in various industries.
Durability
Gas valves are typically made of durable materials that can withstand high temperatures and pressures, ensuring long-lasting performance and reliability.
Easy installation and maintenance
Gas valves are relatively easy to install and maintain, making them a convenient and cost-effective solution for controlling gas flow in different settings.
Safety
Safety is one of the primary reasons why gas valves are essential in gas systems. Gas valves cut off the flow of gas in case of emergency, preventing gas leaks and potential explosions. For instance, the emergency shut-off valve is designed to quickly shut down the gas flow when a gas leak is detected.
Efficiency
Gas valves help to maintain the pressure in the gas system, which is vital for the efficient functioning of gas-fired appliances. Low or high pressure can cause faults or inefficiencies in gas appliances. For instance, low pressure can cause gas appliances to produce insufficient heat, while high pressure can damage the appliances.
Regulation of Gas Flow
Gas valves are used to manage the flow of gas in the gas system. They allow for precise regulation of the gas flow, ensuring that the right amount of gas is supplied to the appliances. In turn, this leads to optimal performance, energy efficiency, and cost savings.
The gas valve’s thermal well senses the temperature of the water inside the water heater. If the temperature of the water is below the desired temperature setting indicated by the dial on the gas control valve, the gas valve will open the gas supply line, feeding gas into the burner chamber via the burner tube (aka burner manifold tube) so that the burner will be lit/remain lit by the pilot assembly’s ignitor. During this process, the pilot assembly and thermal well send electric signals to the gas valve to ensure that the unit is operating safely, and to tell the gas valve when to stop allowing gas into the burner assembly.
Materials of Construction
Gas valves are made from metallic elements such as:
- Aluminum offers good electrical and thermal conductivity, high reflectivity, and resistance to oxidation.
- Copper is ductile and malleable and one of the best conductors of heat and electricity. Both brass and bronze are copper alloys.
- Brass provides good bearing properties and low magnetic permeability.
- Sintered bronze can be impregnated with materials such as oil and graphite.
- Steel is a commercial iron that differs from cast iron both in terms of its malleability and lower carbon content.
- Ductile iron provides the machinability and corrosion resistance of cast iron while providing additional strength and toughness.
- Stainless steel is chemical and corrosion resistant and can have relatively high pressure ratings.
Gas valves can also be constructed of a variety of plastics, including:
- Acetal polymers are semi-crystalline and offer excellent inherent lubricity, fatigue resistance, and chemical resistance.
- Polyvinyl chloride (PVC) is a widely used material with good flexibility, smooth surface, and nontoxic properties.
- Chlorinated polyvinyl chloride (CPC), a higher grade plastic used in water distribution systems, is suitable for high temperatures.
- Polytetrafluoroethylene (PTFE) is an insoluble compound that exhibits a high degree of chemical resistance and a low coefficient of friction.
- Polypropylene (PP) is similar to PTFE, but can be used in exposed applications because of its resistance to ultraviolet (UV) light, weathering, and ozone.
- Polyvinylidene fluoride (PVDF) is a fluoropolymer with better strength and lower creep than similar materials.
Types of Gas Valves and How They Are Used
There are several types of gas valves because of the different environments in which they are used. Below is a breakdown of seven kinds commonly used in the oil and gas industry.
1. Gate Valves
The gate valve may be the most commonly used in the industry. It uses a gate system to open or close a pipeline entirely. This is an excellent choice if the flow rate needs to be controlled and maintained. When the actuator completely opens the valve, the channel is unobstructed, allowing even slurry fluids like crude oil to flow easier. While it is not an ideal candidate if throttling is required in an application, there is not a noticeable pressure drop when this valve is used.
2. Globe Valves
When pressure control is necessary, the globe valve is frequently chosen. It is also often used for open and close operations. The valve plug sits vertically raised and lowered by the actuator as needed. They tend to create a more significant pressure drop than other valve types because of the S-shaped passageway within them. They are a good choice for flow regulation and throttling functions.
3. Check Valves
Gas refineries find check valves extremely helpful as the device opens under pressure and does not allow backflow of fluid or material. Because of the restricted backflow, cross-contamination of the product is prevented. That is, different materials can use the same pipeline. There is no need for an actuator as required in other valve types. However, it does need precise installation to ensure the response to fluid pressure occurs as required.
4. Plug Valves
The plug valve comprises a plug-shaped disc with a horizontal passageway bored through it. When the linear valve is open, fluid will move through the hole. Turning the actuator 90 degrees from the open position blocks any flow through the pipeline. This valve is not suggested for throttling functions but is ideal for unrefined oil products as found in biogas production.
5. Ball Valves
Ball valves are rotary valves that give pipelines fast shut-offs where tight sealing is often required. They are best suited for operation under fully open or fully closed positions as they do not offer reasonable regulation control or throttle functions. This type of valve comes in many different styles, which provides options within the industry. For example, a floating ball valve works better in low-to-medium pressure pipelines, and trunnion ball valves can handle high-pressure conditions. These are easy to repair, offer solid sealing, and provide quick shut-offs.
6. Butterfly Valves
These valves are simple in their construction, are lightweight, and compact. They use a disc-type element held by a rod to regulate flow. They can handle high-pressure pipelines and allow easy flow of materials. When they are closed, they shut tightly. Often, these are used in pipes with large diameters and where a gate valve is not applicable.
7. Slam-shut Valves
These valves provide additional safety of equipment either upstream or downstream from them. This type of valve may be found immediately before a regulator and is designed to remain open until a significant pressure change is detected. It then immediately shuts off the flow and must be reopened manually. They are sometimes referred to as relief and safety valves and are vital to the oil and gas industry in avoiding accidents and injury.
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