Technical difficulties of gas safety burner valve

     Dual blade superhard relatively common seal gas safety burner valve seal gas safety burner valve, Aluminum safety gas valve is suitable for high temperature, high pressure, high erosion and corrosion and other working conditions, the following technical difficulties in the design and manufacturing process.

     (1) Sealing pressure seal in the design of high pressure than when you should be appropriate to the requirements of high dimensional chain between the parts and improve the surface roughness.

     (2) the sphere surface with high hardness, high hardness and self-cleaning function of particles of various operating conditions, the gas safety burner valve opening of the process Gas Grill Control Valve will be particles adhere to the surface of a sphere, the sphere surface hardness requirements of the gas safety burner valve is closed when the state is higher than the hardness of the particles conditions , but also to "self-cleaning" function, otherwise damage the surface of the sphere, it will affect the sealing performance of the gas safety burner valve between the seat and the ball.

     (3) casting and forging more gas brass safety valve difficult to use a temperature higher than 600 ℃, castings and forgings prone to cracks, casting and forging process very demanding.

     (4) sealing surfaces are processed with a hard ball superhard material or surface hardening treatment, universal tool can not be processed, which can be processed even if the machining accuracy can not meet the requirements, but also requires processing apparatus has sufficient strength, and therefore to select the appropriate tool is very important.

The features of gas burner valve

     Dual blade superhard seal gas Burner Valves according to operating conditions required for high temperature, high pressure, corrosive and other media containing particles. The new structure has many seal gas burner valve operating torque, good sealing performance characteristics.

     (1) long-term high temperature can work at a high temperature above 600 ℃, the most suitable for high temperature operating conditions.

     (2) high pressure gas burner valve to work long-term rating at 25MPa pressure conditions.

     (3) corrosion to meet the special requirements of sulfuric acid, hydrochloric acid, nitric acid, acetic acid, and salt (sea), and other conditions of corrosive media.

     (4) wear can meet a variety of gas oven safety valve, mining and metallurgy, paper, coal chemicals, abrasive and polycrystalline silicon / silicone industry harsh, harsh working conditions in the wear resistance of special media.

Burner valve Works

     Pneumatic means, or other means for driving the upper end of the stem, the output torque transmitted to the ball Bbq Gas Valve, cause it to rotate 90 °, the sphere flow path coinciding with the center line of the burner valve flow path, a double doctor blade superhard seal burner valve opening action is completed, whereas the vertical, so that complete closure of the burner valve action, closed clockwise or counterclockwise turn. When the ambient temperature, the high-titanium spring preload sulfur-free flexible graphite sealing Gas Burner Safety Valve surface expansion; high temperature, high sulfur-free flexible graphite titanium expansion itself, a seal between the Gas Top Burner Valve and the burner valve seat. Ball seat and seal sealing surface at low pressure, by spring preload makes sealing surface; at high pressures, so that under the action of the spring preload and media pressure, both sealing surface.

Structural features of gas safety burner valve

     Metal sealing ball floating ball and fixed ball two structures, pole superhard sealing Gas safety burner valve from the main and auxiliary Gas safety burner valve, ball, seat, seat ring, seat support ring, the support sleeve, under the support shaft, bearings, brass aluminum safety gas taps sliding bearings and other components and the Gas safety burner valve stem. The overall use of two fixed dome design, the stem of coat type, dust and spray structure, packing compression plate structure using spring preload pressure ratio compression provides structure, spheres, hardened Gas safety burner valve seat sealing surface, the Gas safety burner valve aNTI media sedimentary structure, advanced Gas safety burner valve seat polyethylene years of pilot operated safety valve manufacturing experience and innovation double blade and a compression spring or disc spring dust protection design, a blade in the seat sealing surface, another scraper at the top of the seat. The difference between small-caliber ball floating ball gas cooker safety valve stem with a fixed formula for downloading anti-ejection structure, as well as innovative structural freely rotating ball rolling.

Pneumatic actuators and instrumentation control gas burner valve performance comparison

     Meter-off Range Top Burner Valve with remote operation, the Gas Burner Valve off quickly and so on, but the meter Gas Burner Valve cylinder larger, higher installation space requirements, while the high investment, the Gas Burner Valve needs to DCS to operate, require laying of cables, purchase barriers and DCS card parts and other system resources; control Gas Burner Valve failure rate is higher, will be affected by loss of power Gas Burner Valve, solenoid Gas Burner Valve failure, DCS barrier and cards, and many other factors of failure, causing the Gas Burner Valve to malfunction. Author's PTA plant in pot root zone PX tank Gas Burner Valve transformation process, have encountered since the normal discharge Gas Burner Valve solenoid energized, causing the Gas Burner Valve to close and cause the device parking situation.

     Pneumatic actuators installed smaller, cost only half of the same caliber instrument control Gas Burner Safety Valve. Pneumatic actuator gas source driver switches are required, after each selection on or off, the Gas Burner Valve is on hold after the action in place, not because of external factors interference caused the sudden closure of the Gas Burner Valve, to avoid production fluctuations. Pneumatic actuators can also be required, with explosion-proof solenoid Gas Burner Valves and back to the hearing, DCS remote access control Gas Burner Valves, Gas Burner Valve echo divided into two type switch and 4 ~ 20mA analog continuous Gas Burner Valve type. Equipped with a Gas Burner Valve controller can achieve 4 ~ 20mA analog input adjustment control.

How to determine the quality of the gas safety burner valve

Reference to judge good or bad Gas safety burner valve: the Gas safety burner valve is in compliance with the provisions of the materials used (the transmission medium, the work environment); exterior is smooth (paint, shell, plate identification); parts are complete (greasing mouth, outfall, exhaust pressure port, within a one-way Gas Burner Safety Valve, plugs, flat pressure bypass Gas safety burner valve, automatic greasing machine); accessories installation location is easy to maintain construction and commissioning; operation is easy (and actuator output torque match the size and location of the hand wheel); whether the function can achieve long-term functioning.

     As an engineering technician, you must understand and master the equipment in contact with the work, to understand the Range Dual Safety Valves principles, to understand the structure, to understand the maintenance and operation of the equipment, can perform their own work positions. Pipeline related equipment range, ball belongs to the key equipment in these devices, require managers must be familiar with the relevant technology, constantly sum up in their work to improve the technical level, to contribute to the cause of the gas Burner Valves pipeline.

Ball burner valve common fault

The burner valve is most likely to reveal the problems, leakage problem of ball burner valve for a variety of reasons: the burner valve body dirt exists is the main reason for the gas Burner Valve seat leakage. These contaminants can not only be sand, scale, metal exfoliation, welding residue and corrosive products, may also be a tool, welding, wooden or plastic products. Grease, seal fat or compressor oil can make the hard rubber material, such as polymer degradation and decomposition. The decomposition products with other pollutants like, due to the burner valve seat sealing surface separation, thereby causing the burner valve seat leakage. Cause the seat leakage reasons and the ball Gas Burner Safety Valve sealing and sealing seat contact surface scratches. The sealing surface of a small scratch for long time may finally led to the erosion of large leakage. Corrosion will cause depression or rupture of the sealing surface, and eventually lead to burner valve seat leakage. Sealing surface damage is probably caused by pipe cleaner before the impurities.
The sealing seat jammed. The sealing seat should be 0.003 inches of lateral movement, if the seal seat spring is not working properly, may cause the burner valve seal bad, even if the grease can not seal. Seat O - ring seal leakage, sealing grease injection may. Corrosion (oxide), grease can reduce the oxidation of probability, cleaning liquid can be softening hardening material. The burner valve switch is not in place, the ball burner valve by rotating around the center line of the body to turn 90 degrees. Ball burner valve in the closure of the channel is exposed in the pipeline before only 2 degrees to 3 degrees. burner valve neck track ball Burner Valves guide rod (stemguides) deviation is also one of the reasons causing the burner valve switch is not in place.