gas oven safety valve problems made in china

This range will not fire up. I checked the igniter and it glows. I did not test it for resistance though. I assumed it was the gas control valve. I replaced that no problem. Still the burner will not fire up. Igniter, clock/control board, or thermostat? I saw no burned wires. Thinking it is a bad relay on the control board. The stove fires up no problem so new valve is ok, It has got to be with the input voltage for the valve solenoids inside control valve. Any help appreciated.

With the strengthening of China’s environmental awareness and the change of energy structure, China’s urban gas industry has made great progress. The types of gas have developed from simple coal system to multiple gas sources. In the late 1990s, the continuous development, construction and utilization of China’s natural gas resources have promoted the development of China’s urban natural gas into a new era.

The pressure of natural gas transmission and distribution is higher than that of man-made gas, so it is very important to store and transport natural gas safely in densely populated cities and towns. If the leakage and shutdown accidents caused by improper selection or poor quality of

In order to have enough “strength” and “rigidity” — “strength” means that the valve should be able to bear the Zui high pressure of gas transmission and distribution in the pipeline, and more importantly, it must have enough “rigidity”, that is, it can keep the valve from deformation even under various external forces of the underground pipe network, which can guarantee the sealing performance of the valve:

1. Reduce the structural height of the valve as much as possible (referring to the height from the center line of the valve flow section to the valve top) to reduce the buried pipe depth;

2. The top of the valve shall be equipped with a fully closed opening and closing indicator, so that the operator can see the status of the valve at any time, which is an important condition for safe operation;

4. Reliable sealing performance, cj3055-95 “test and inspection of urban gas valves” standard stipulates that: under 1.1 times of nominal rated service pressure, soft sealing valve is not allowed to have any perceived internal leakage, and under 1.1 times of nominal rated service pressure, hard sealing valve is allowed to have internal leakage less than 0.3dnmm3/s, which is relatively strict, such as: 500mm nominal diameter gas valve The internal leakage per minute shall not be more than 9 ml (the capacity of ordinary drinking cup is 200 ml) and the external leakage is not allowed;

5. The shell of the gas valve used in the underground pipe network shall be corrosion-resistant. It is recommended to use different shell materials according to the transmission medium and service pressure of the pipeline;

6. For the design of valve parts, the structure of less maintenance and no maintenance shall be considered, so as to reduce the workload of maintenance as much as possible, reduce the road closure due to valve maintenance and affect the traffic;

7. Most of the underground pipeline valves are manually opened and closed. It is required that the opening and closing torque of the valve is small, and the number of turns in the whole process should not be too many, and the air source can be cut off as soon as possible after the accident;

8. Various underground pipelines of urban roads in China are crowded and complex, so it is not suitable to excavate basement inspection wells, so direct buried valves are recommended.

1. For the transmission and distribution pipeline under medium pressure class B (0.2MPa), it is recommended to use gray cast iron valve, which has the advantages of good corrosion resistance and low price, so it is very suitable for underground pipeline;

2. For medium pressure class A (0.4MPa) or below, or even high pressure class B (0.8MPa), it is recommended to use ductile iron or cast steel for manufacturing, with emphasis on the selection of ductile iron. For example, compared with cast steel brand WCB, the mechanical property of the former is no less than that of the latter, while the corrosion resistance and casting process are better than that of the cast steel, and the price is also lower than that of the cast steel (generally about 70% of the cast steel). Therefore, the overall performance and price of the ductile iron valve are better than that of the cast steel valve. In the above pressure range, the ductile iron valve can be selected as much as possible, but especially Do not pay attention to the quality control of nodular cast iron;

3. In places with high-pressure class A (1.6Mpa) or higher, it is recommended to select cast steel valves, and WCB brand is generally used to manufacture valves below 4MPa;

PE ball valve has also come out. This series of ball valves can be directly buried and have good sealing performance. However, at present, the price of PE ball valve is relatively high, especially for ball valve larger than 100mm.

In the 1980s, China’s gas is mainly made of artificial coal. There are more impurities and “gas glue” in the artificial coal gas. The traditional single ram wedge type sluice valve can not meet the needs of the gas working condition more and more. This kind of valve generally has the problems of “not tightly closed” and the valve rod is blocked. The gas oil sealed plug valve solves the problems of not tightly closed and the valve rod is blocked. Its main technical features: hard sealing structure is adopted to make it have the function of scraping rubber; the sealing surface does not contact with gas impurities, there is no valve rod in the cavity, and there is no problem of valve rod seizing; the sealing grease and O-ring that are specially developed to resist the erosion of gas medium improve the performance of plug valve.

With the development of gas industry and the establishment of gas plants, special gas valves with large or even extra large nominal diameter are needed. The problem of artificial gas formation is solved one by one by using parallel double gate valve for gas, and the diameter of Zui is 1600mm.

1. In the process of opening and closing, the parallel double gate valve can scrape off the “gas glue” on the sealing surface, which solves the big problem that the gas impurities adhere to the sealing surface and affect the valve sealing;

V. the valve body adopts the specially designed “squirrel cage frame stiffener” to reduce the overall weight of the valve and enhance the strength and rigidity of the shell;

7. The gate valve of this series is equipped with a fully closed opening and closing indicator, so that the operator can clearly understand the status of the valve.

Compared with the above valves, butterfly valves are lighter, larger in diameter and lower in price. In the early 1980s, some gas companies once used butterfly valves. After about ten years of use, it is generally considered that the effect is not good.

1. The isolation width of the sealing pair of butterfly valve is too narrow, which is easy to cause the valve disc to close excessively or not in place, affecting the sealing;

3. Because the middle part of the seal fitting is rubber or polytetrafluoroethylene, it is easy to be damaged or fall off during gas flushing, and the service life is short. It is proved that butterfly valve is not suitable for gas pipeline except for special position.

Flat gate valve is a general valve which has been used in gas pipeline in recent years. Its flow resistance is small when the valve is full bore, and the seal on both sides is formed by pressing PTFE or rubber O-ring on the gate. This kind of valve can’t be completely closed or fully opened without gas in the middle cavity, which is not convenient for users to judge whether the valve is closed tightly in emergency repair. If the valve is to be completely closed without gas in the middle cavity, the opening and closing torque will increase rapidly; some factories Home made reducer, such as DN200 caliber, with an inner diameter of only 150 mm. Users should pay special attention to it. Therefore, the flat gate valve is suitable for the occasion of lower pressure level system and smaller nominal diameter.

Elastic seal gas gate valve is different from flat gate valve. The features of the valve are similar to the elastic seat structure of the fixed ball valve. The sealing seat rings on both sides of the ram are of the elastic floating structure. The sealing faces are always close together during the opening and closing process, and can compensate the wear of the sealing pair, which is suitable for the occasion of high pressure system. When the valve is fully open and fully closed, there is no gas in the valve cavity, even if the remaining gas in the valve cavity is released There is still no pressure in the cavity, so users can safely construct the pipeline downstream of the valve, which greatly reduces the working time for gas stop preparation before construction.

There are two connection forms of elastic seal gas gate valve: flange type and welding type. Flange type is the traditional connection way. The welding type can directly weld the valve and the pipeline, saving the pipe laying cost; the two kinds of valves can be directly buried, avoiding unnecessary inspection wells, and bringing convenience to the construction.

When the elastic seal gas gate valve is fully opened, it looks like a section of pipeline with the same diameter of the pipeline, with minimal flow resistance; all sealing surfaces are hidden and do not contact with the medium. For the artificial coal to gas, the “gas glue” cannot adhere to the sealing surface, and for the natural gas, the dust and gravel can not wash the parts.

In a word, the elastic sealing gas gate valve is suitable for gas pipeline, especially for underground gas pipeline. From the situation of foreign investigation, many countries use the elastic flat gate valve on the natural gas pipeline. Compared with the nominal diameter elastic flat gate valve and the ball valve, they have the function of fire prevention, and the price is about 30% lower than the ball valve, so the use effect is the same. The disadvantage of Trz series elastic seal gas gate valve is that its structure height is large, and it has 4 nominal diameters. Because it is buried underground, the height above the central axis of the pipeline is the same as that of the common gate valve, and its disadvantage is not obvious, mainly that the height of the lower half is larger than that of the common gate valve, and the buried depth is larger during construction, but generally does not affect the pipeline laying;

The emergency cut-off valve for pressure regulator is an important safety protection device in gas transmission and distribution system. The emergency cut-off valve is to install the emergency trip mechanism on the upper or side position of the stop valve. It is also connected with the regulator body as a whole, and with the filter as a whole. Its function is to shut down the air source in an emergency after the regulator fails, causing overpressure or loss of pressure, so as to ensure safety. The large use of natural gas in the city has improved the pressure level system of the pipe network. The failure of the pressure regulator will bring disastrous consequences to the city. The domestic gas industry has paid more and more attention to this. The products selected in China have not formed a certain trend. Imported, joint venture and domestic products are hard to distinguish between the good and the bad, so the selection should be cautious. RAQ series gas emergency shut-off valve is connected with the filter as a whole, with novel and compact structure and high sensitivity. It can quickly cut off the gas source of the pressure regulator at the set overpressure (300 mm / H2O) and pressure loss (180 mm / H2O) to ensure the safety of users;

In case of gas leakage or other disasters of gas boiler, gas air conditioner and gas equipment, the emergency shut-off valve shall cut off the gas source quickly to prevent the expansion of the disaster. At present, the gas emergency shut-off valve has not been popularized in China. With the strengthening of environmental protection awareness and safety awareness, as well as the development of gas industry, the gas emergency shut-off valve will certainly get people’s attention. The gas emergency shut-off valve is a valve to ensure safety. It is connected with the automatic monitoring equipment to execute the valve closing instruction. Therefore, the gas emergency shut-off valves are all electric valves. According to the existing data, there are two types of such valves, one is solenoid valve, the other is electric valve. Due to the high requirements of gas emergency shut-off valve, such as fast speed, sealing, small flow resistance, caliber specification, etc., the existing solenoid valve and electric valve have certain defects, which can not meet all the requirements. These valves are analyzed one by one as follows:

I. At present, most of the solenoid valves are imported. The speed of the solenoid valve is fast, but the flow resistance is large. The flow resistance Zui in the stop valve is large, the pressure loss is large, and the caliber is small. It is difficult to manufacture the large caliber solenoid valve. Generally, it can only be below DN150, and the price is expensive. If the large caliber solenoid valve is equipped to meet the requirements of the diameter, the technical and economic ratio index is poor. Some solenoid valves are opened by electromagnetic field. Once the power is lost, the valve will be closed even if the power is lost instantaneously, which is not in line with the actual working condition. Uncoupling solenoid valve, energized uncoupling and closing valve, has high sensitivity and fast speed, because with DC low voltage, a little interference or power supply “shaking” will cause misoperation, affecting normal life and production;

2. Electric butterfly valve, with low price, is easy to be made into large caliber, and its opening and closing speed is faster than that of gate valve, and slower than that of solenoid valve; the flow anion is smaller than that of solenoid valve, and larger than that of gate valve; its sealing performance is worse than that of solenoid valve and gate valve, and because of the small sealing isolation width, the rapid opening and closing speed impact is easy to cause insufficient or excessive opening and closing;

3. Electric gate valve, with higher price, small flow resistance and good sealing performance, but its speed is too slow to meet the requirements of emergency cut-off;

4. The ball valve has small flow resistance and good sealing performance. However, the opening and closing speed of domestic or imported electric ball valve in the market is generally within 15-30 seconds, which can not meet the fast requirements. The user’s requirements for the opening and closing speed of emergency shut-off valve are generally within 10 seconds. The electric ball valve has many advantages. It can become an ideal emergency shut-off valve only by improving the opening and closing speed.

The emergency cut-off electric ball valve integrates the advantages of the ball valve, with the opening and closing speed of 3.75 seconds, which fills in the gaps at home and abroad. In addition, it has the function of anti-static and fire prevention in the structure design. The electrical equipment can be connected with the gas leakage alarm, disaster control equipment, fan and other auxiliary equipment. The overall design conforms to the price of dbj08-65-97 technical code for urban natural gas pipeline engineering It is much lower than similar imported products. Once it came out, it was accepted by gas users and received high praise.

The compressor of gas storage and distribution station often needs to be equipped with check valve to prevent gas from flowing back into the compressor. The water check valve has been eliminated in the gas industry. The main disadvantage of the general gas check valve is that the valve plate vibrates with the reciprocating motion of the compressor, which makes a great noise when colliding with the valve body and easily damages the valve plate. The second is poor sealing.

The gas valve plays an important role in the gas industry, and the Ministry of construction attaches great importance to the normative construction of the gas valve. The industry standards of the gas valve include CJ3005-1992 general technical requirements for grey cast iron valves for urban gas, CJ3055-1995 test and inspection for valves for urban gas, CJ3056-1995 general technical regulations for ductile iron and cast steel valves for urban gas In June 2002, it also passed the industry standard of domestic manual gas valve. The formulation and promulgation of these standards standardize the valve industry, promote the progress and development of gas valves, and promote the development of gas industry; provide a reference for the research, production and use units; improve the understanding of the difference between gas valves and general valves, and ensure the safety margin of gas valves; they are welcomed by the gas industry.

1. The underground pipe network is made of medium pressure class B and below, and it is recommended to use direct buried gray cast iron parallel double gate valve;

2. The underground pipe network is of medium pressure class A and below, and it is recommended to use directly buried parallel double gate valve or elastic flat gate valve;

3. For underground pipe network under high pressure class B or under high pressure class A, it is recommended to use directly buried elastic flat gate valve and fixed ball gas ball valve;

5. For storage and distribution station or ground equipment with pressure below 0.4MPa and larger than DN500 caliber, gate valve shall be used as far as possible to reduce the price.

6. In the pressure regulator or pressure regulating station, parallel double gate valve is recommended for low pressure level (below 0.4MPa), and floating type gas ball valve can be used for gas ball valve. If the pressure level system is lower than 1.6Mpa, fixed type gas ball valve and elastic flat gate valve can be used.

7. In the pressure regulating box, if the butterfly valve must be selected due to the limited space conditions, the multi eccentric butterfly valve shall be selected, and the sealing material shall be polytetrafluoroethylene or hard seal, and it must be adjusted to the closed position accurately during commissioning.

China’s gas industry, especially the rapid development and popularization of natural gas, has driven the progress and development of gas valve manufacturing industry. With the introduction of West to east gas transmission, offshore natural gas, and Russian gas sources, new gas valves will come out to meet the needs of gas users.

(Yaang Pipe Industry is a leading manufacturer and supplier of nickel alloy and stainless steel products, including Super Duplex Stainless Steel Flanges, Stainless Steel Flanges, Stainless Steel Pipe Fittings, Stainless Steel Pipe. Yaang products are widely used in Shipbuilding, Nuclear power, Marine engineering, Petroleum, Chemical, Mining, Sewage treatment, Natural gas and Pressure vessels and other industries.)

The gas valve on your boiler controls the flow of gas to the pilot light and burner. When you demand heat or hot water, the boiler works like this: The PCB first detects the fan is operational, ready to expel dangerous flue gases via the flue.

In the open position (gas is flowing) the handle (lever) will be parallel with the pipe, when it is closed (gas not flowing) the handle (lever) will be perpendicular to the pipe. This should make it easy for you to tell if the gas is on, or off.

A thermocouple is a device made of two different metals which creates a small electrical charge when heated at one end by the gas pilot. This small charge causes an electromagnet inside the gas valve to open and allow gas to flow to the main burners.

A gas control valve can be found on any appliance that utilizes gas. These valves are vital for the operation and safety of any gas appliance. The valve does exactly what it sounds like, it controls the amount of gas flowing to create a steady flow without allowing any gas to leak.

Product Gas Air Compressor Safety Valve Thermocouple Valves Gas Air Compressor Safety Valve Thermocouple Valves Picture Model HC-2025 HC-2026 Branding OEM/ODM Meterial Brass Technology Forged,Cutting by Numerically controlled lathe Surface treatment: Plated or pickling. Application Use for plumbing, sanitary ware, machine part and so on. Size 1/8" 1/4’ 3/8" 1/2" 3/4" 1" 1/8" 1/4’ 3/8" 1/2" 3/4" 1"

Answer: No, this is not possible due to the gas being controlled by the gas safety valve. You need the igniter to be working properly before gas is allowed out of the gas safety valve.

The igniter is a small round or rectangular (flat oven igniter and the round oven igniter) device located near the burner and is wired in series with the gas safety valve. When the igniter is cold, it has a lot of resistance, meaning it gets most of the electricity in the circuit. As the igniter heats up, its resistance drops allowing the heat to pass to the bi-metal strip in the gas safety valve, which then allows gas to be released to the burner assembly. The gas then gets ignited by the glow-bar igniter. The igniter glows the whole time the burner is on, keeping the gas safety valve open. The thermostat senses when the desired temperature is reached, and cuts off electricity to the gas safety valve and igniter.

Appliance medic has an help line on “Gas Oven Glow bar Igniters” along with and some helpful tips if you plan on making this repair yourself. He also offers some helpful suggestions on the two different types of igniters: the flat oven igniter and the round oven igniter and how to tell which shape your gas oven takes.

Appliance medic also offers a helpful support on How Gas Ovens Work which might help you troubleshoot any problems.Examples of a Flat Oven Igniter and a Round Oven Igniter for your gas oven:Flat Oven Igniter Part NumberFlat oven igniter that is commonly used on viking gas stoves and ranges

A60 safety valve is adopted in the European type range. The flameout protection device uses the principle of magnetic attraction of the solenoid valve to ensure that the gas is automatically closed when the flame goes out unexpectedly. Widely used in Europe, Australia, Middle East, Southeast Asia and China market.

A variety of installation ways, the application is more flexibleWe can adjust and tailor-made the specifications according to the structure and functions of the cooker manufacturer. A60 safety valve has a variety of installation methods, including SPIGOT, SADDLE MOUNT, U MOUNT and FLANGE.

The A60 safety valve with CSA, CE and Australian certification meets the highest standards of air tightness, durability and working pressure and temperature in the commercial appliances industry. Cooker"s manufacturers can sell the same model to multiple markets for saving development and design costs.

The body of clamping design of on-off valve A18-X1X can be assembled with a general wrench, which is fast and convenient for assembly. Stainless steel flexible tube are produced from CSA certified raw materials with durable and reliable quality.

Manifolds and gas valves pre-assembly service to save the assembly cost of cooker"s manufacturers and increasing their production capacity. All of Alpha Brass Control"s products are high accurate and 100% air-tight tested.

Indeed, and I should thank you, Susan/dirtybloomers/Maddy Reynolds for your old post which I used to identify a substitute part when it came time to replace my NXR"s oven ignitor last spring. FWIW, when I took a copy of your old post and my old ignitor in to the local Sundberg, they had no trouble finding a less expensive duplicate while also cross-referencing substitutes

HVtech, when I dashed off my little comment, I did not realize it could be read that broadly. I was focusing on cross-referencing from OEM parts to the much less-expensive generic replacements which is what I thought the OP was looking for. Duro support does have its problems, but I did not mean to suggest

countervailing point for the NXR -- for some of us, at least --- is that the NXRs are simple enough for DIYing. As with any gas stove, some things will need periodic replacing just as a car or truck needs new spark plugs or headlamp bulbs every once in a while. So far, it seems things that will need replacing are things that can be replaced with