Tag Archives: Gas Burner Valves

The purchase of low temperature valve and common issues

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Gas Burner Valves – China Manufacturer
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http://www.qus-gasvalve.com/key-Gas-Burner-Valves-36/

Cryogenic valves are the valves used in the low-temperature conditions, usually working temperature below -40 ℃ valve known as cryogenic valves. Cryogenic valves to the petrochemical, air separation, natural gas and other industries an important and indispensable equipment, one of the pros and cons of its quality determines whether security, economic, and continuous production. With the development of modern technology, the use of cryogenic valves more widely, increasing demand.

Temperature higher than -50 ° C, generally do not use the structure of long-necked ball valve temperature is below -50 ° C, neck length T according to the Shanghai the Vivendi Valve Co., Ltd. to design and calculation to determine the low temperature ball valve with output liquid cryogenic media such as ethylene, liquid oxygen, hydrogen, liquefied natural gas, liquefied petroleum products, not only inflammable, explosive, and when the temperature gasification, gasification, the volume expansion is hundreds of times.

Liquefied natural gas valve materials is very important, material failure will cause the shell and the sealing surface of the leak or endoleak; parts of the mechanical properties, strength and rigidity can not meet the requirements and even rupture. Lead to liquefied natural gas media leak caused an explosion. Therefore, in the process of development, design, development of liquefied natural gas valve, the material is the primary key. Body, bonnet and used: the LCB (-46 ° C) and LC3. (-101 ° C), CF8, (304) (-196 ° C).

Cryogenic valves require long-necked bonnet structure, its day is to reduce the heat in the outside world into the device; to ensure that the temperature of the stuffing box area above 0 ° C, so that the filler can work; prevent subcooling leaving due to the stuffing box section in the stuffing part of the stem and the valve cover frost or freeze of the Ministry of parts.

Long-necked bonnet design is the design of the neck length L, L refers to the distance to the bottom of the stuffing box to seal seat surface, and material thermal conductivity, coefficient of thermal conductivity of the area and the surface heat, cooling area, and other factors. calculation is more complicated, usually obtained by the experimental method.

Cryogenic valves, harsh working conditions, most of the working medium as flammable, explosive, strong penetration of substances, the minimum working temperature up to -269 ° C, maximum operating pressure up to 10MPa. Therefore, the low temperature valve design, manufacture, test, compared with the universal valve big difference.

Shanghai the Vivendi Valve Co., Ltd. has been to do everything we encounter a lot of guests on a misunderstanding of the cryogenic valves in the sales would have thought to write medium-length article. A lot of guests, directly put the valve material is low temperature steel cryogenic valves, In fact, it was just a low-temperature valve semi-finished products, because he did not after the low-temperature cryogenic processing can also be said that the low-temperature deep cryogenic treatment is a cryogenic valves the crowning touch, low temperature valve key is in the deep cold treatment, so as to ensure that the various parameters of the cryogenic valves meet the requirements, especially the coefficient of expansion, will not result in the use of a variety of valve stuck situation. Sometimes consider next the question of price, but also consider the quality of the valve. Cryogenic valves are special valves.

In fact, most of the low temperature valve are not low-temperature cryogenic treatment, the first cost will be expensive, where I can give you a rough calculation under, if the high cost of jacketed cryogenic equipment and cryogenic equipment is expensive, In addition to the necessary materials in liquid nitrogen cryogenic is bad storage media, as well as processing where a valve consumed liquid nitrogen and liquid nitrogen price is not cheap. I plant on the production of low-temperature valve by low-temperature processing, the rough parts in the cooling medium for several hours (2-8 hours) to release stress, to ensure that the low temperature properties of the material to ensure that the finishing size to anti-valve in the low-temperature conditions, due to temperature changes caused by deformation caused by leakage of cryogenic valves.

Cryogenic valves inquiry will be enough to pay attention to things now:

In order to allow the cryogenic valves to better meet the use requirements of the customer, if you need a cryogenic valves, please provide the specific parameters that you know so

A. The name of the cryogenic medium

Two. Cryogenic temperature of the medium

3. You need to customize their own so the length of the long neck of cryogenic valves, does not provide standards by Shanghai Vivendi Valve Co., Ltd. to.

4. Cryogenic valves of the material (which can be customized according to customer requirements)

5 Pressure cryogenic valves

6. The low temperature valve seal (soft seal or seal)

7. Connection (flange or welded)

8. Drive mode (manual, pneumatic, electric)

9. Delivery, etc.

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The history of the valve lathe

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Gas Safety Valves – China Manufacturer
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http://www.qus-gasvalve.com/key-Gas-Safety-Valve-64/

The valve manufacturing and processing, and lathe relations are inseparable, the valve of the development and updating of the lathe for a very long history: the ancient lathe by hand or foot through the rope so that the workpiece rotation, and hand-held tool cutting.

In 1797, the British mechanical inventor Maudslay created the modern use a screw drive turret lathe change gears in 1800, the pitch can change the feed rate and the processing thread.

1817, another Englishman Roberts uses a four pulley and the back wheel mechanism to change the spindle speed. In order to improve the degree of mechanization and automation, 1845, Fitch invention turret lathe; 1848, the United States and the back wheel lathe; 1873, the United States, Spencer made a single-axis automatic lathe, and soon he made three axis automatic lathe; the early 20th century by a separate motor-driven lathe with gearbox.

After the First World War, the rapid development of the arms, automobile and other machinery industry needs, a variety of efficient automatic lathes and specialized lathe. In order to improve the productivity of small quantities of the workpiece, the late 1940s, the lathe with hydraulic copying devices have been promoted at the same time, multi-tool lathes have also been developed. In the 1950s, developed with punch cards, the latch plate and the dial code disk such as process control lathe.

CNC technology in the 1960s for the lathe, have developed rapidly in the 1970s. The lathe is the main car turning the knife on the rotation of the workpiece processing machine. Also in the lathe with a drill, reamer, reamers, taps, dies and knurling tools for appropriate processing. The lathe is mainly used for the processing shaft, disk sets, and other rotary surface of the workpiece, is the most widely used in machinery manufacturing and repair facility of a class of machine.

Lathe in accordance with the purpose and function area is divided into various types. Lathe processing object and a wide range of spindle speeds and feed rates to the amount of adjustment, can the inner and outer surfaces of the workpiece, end and internal and external threads. This lathe operation manual workers, low productivity, suitable for single, small-batch production and repair shops. Turret lathes and rotary lathe turret can hold multiple tools or back to the round turret, a fixture of the workpiece by the workers in order to use different tools to complete a variety of processes suitable for mass production.

The automatic lathe according to certain procedures, auto-complete multi-process machining of small and medium-sized workpieces, automatically loading and unloading, repeated processing of a group of the same workpiece, applicable in a large number of mass production. Semi-automatic lathes have single-axis, multi-axis, horizontal and vertical of multi-tool. Uniaxial horizontal layout of the form similar to the ordinary lathe, but the two sets of turret mounted on the spindle around or up and down respectively, for processing plate, ring and shaft workpiece, its increase of three to five times more productive than the ordinary lathe.

Can be modeled on the shape and size of the sample or sample copy lathe, auto-complete workpiece machining cycle, applicable to more complex shape of the workpiece, small batch and mass production, productivity 10 to 15 times higher than the ordinary lathe. Multi-turret, multi-axis, reels, vertical type. Vertical lathe spindle vertical to the horizontal plane, the workpiece clamping the rotary table level of turret to move on beams or columns.

For processing large, heavy, difficult to install on the lathe, the workpiece is generally divided into single and double column two categories. Backing-off lathe while turning, turret periodically for radial reciprocating motion for forklift cutter, hob, etc. forming the tooth surface. Usually with relief grinding attachment, grinding tooth surface by a separate motor-driven wheel shovel. Specialized lathe is used for processing certain types of specific surface of the workpiece the lathe, lathe, such as crankshaft, camshaft lathe, the wheel lathe, axle lathes, roll lathes and ingot lathe and so on.

Joint lathe is mainly used for turning, but attach some special parts and accessories, but also boring, milling, drilling, plug, grinding and other processing, with the characteristics of more than one machine can \"apply to construction vehicles, ships or mobile repair work on the repair station.

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Valve testing test equipment in China dominate the market by resolution

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Range Top Burner Valve – China Manufacturer
Thank you for inquiry my Range Top Burner Valve, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com
http://www.qus-gasvalve.com/key-Range-Top-Burner-Valve-21/

 Valve test bench of the valve test test equipment and international production of power is still pregnant with great potential for development. Abroad a lot we can learn from. The central concept of scientific development, a new road to industrialization, conservation-minded society, we need to be reflected in our actual work.
    Look, outstanding international valve testing machine whether it is an annual output value or the quality is much higher than the domestic, which indicates that the two questions, First, the valve test pressure test test equipment is still in the "inward looking", the second is The valve hydraulic test bench is still a relatively broad market. However, how to enter the marketplace is worth pondering.

    To work hard on the word "excellent". Excellent, mainly referring to the quality of the brand is the brand name. Its meaning is very wide, runs through the whole process of the mechanical valve product technology, process technology and organizational technology throughout the parts of the mechanical valve, equipment and processing of various processes throughout the valve mechanical product assembly, commissioning until the user full range of site installation, commissioning and service work, the whole process, all-weather. Mechanical valve products to really do the "excellent".

    To the "strong" character aspects to work on. From industry, varieties, production analysis, China has formed a relatively complete variety and a certain number of valve testing machinery producing countries. However, in essence, not a production of power in the high-quality, advanced technical and economic benefits. On the existing basis, regardless of industry, enterprise, whether it is whole host of production or parts production; all efforts should go to the "strong" direction.

    "Make a fuss. Information technology, mechatronics, to reflect the modern, digital PLC control automation management embodied in the product. Information technology has a progressive approach to become a reality. Through the realization of ", reflecting the level of product technology and enterprise management level.

    "Brains. Regardless of the "excellent", "", "" need to implement to achieve, no talent is not enough. The talent the Xingguo this base enriching the people, the source of development, technological innovation, economic development, social development, the explorers practice. Well-off cause, talent, and valve hydraulic test machinery industry also rely on people. To train and retain qualified personnel to enable them to business opportunities, working platform, the development of space. The whole industry and businesses have felt the shortage of talent, the possibility of organizing the implementation of the combination of research, scientific research and development institutions of education and production practice is closely integrated, targeted research and teaching, research and teaching projects through production become productive. You can also open up the human resources, including domestic and foreign human resources, the use of domestic human resources is the main.

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Hangzhou valve products in April 2011 the export situation outlined

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Range Top Burner Valve – China Manufacturer
Thank you for inquiry my Range Top Burner Valve, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com
http://www.qus-gasvalve.com/key-Range-Top-Burner-Valve-21/

Zhejiang Province is the largest province of the valve outlet, in April this year, the exports of the valves of the Hangzhou region showing a significant increase in total exports of 107 approved, the value of $ 4,431,000, the value increased by 70.7 percent compared with last year. Open up foreign markets to help export enterprises in Hangzhou, Hangzhou, Inspection and Quarantine strictly to strengthen the shell, sealing performance testing, connect the control of dimensional accuracy and other key points.
At the same time by more than initiatives to increase the valve business of helping to guide enterprises to establish a series of mechanisms from raw material to finished product testing to help enterprises to upgrade innovation, strengthening the training of enterprise personnel, and continuously improve product quality and management level , Hangzhou valve out of the country.

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Chinese valve industry s future high tech trends and direction of investment

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Gas Burner Valves – China Manufacturer
Thank you for inquiry my Gas Burner Valves, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com
http://www.qus-gasvalve.com/key-Gas-Burner-Valves-36/

With the continuous development of science and technology is also the control valve products in China market to the high-tech, strong corrosion resistance, high-parameter, strong corrosion resistance, high life direction. According to the analysis of domestic and international valve technology and domestic and international valve market demand analysis, developed various industries in recent years high-tech trends and direction of investment in industrial valves and valve industry, as follows:

(1) nuclear power valves

Nuclear power than conventional large-scale thermal power station with the valve with the valve, its technical characteristics and requirements to be high. Valves generally a gate valve, cut-off valve, check valve, butterfly valve, safety valve, main steam isolation valves, ball valves, pneumatic control valve diaphragm control valve, pressure reducing valves and control valves, etc.; representative valve the highest technical parameters: the largest the caliber DN1200mm (core, three butterfly valves), DN800mm 2 (nuclear main steam isolation valve), DN350mm (core, a main circuit gate); maximum pressure: about 1500 lbs level; highest temperature: about 350 ° C; media: the coolant (the diboride water). Production of nuclear grade valve product requirements: usually nuclear industry standards EJ, the United States the ASME, the IEEE standard and the French pressurized water reactor nuclear island machinery and equipment design and construction rules of RCC-M and so on.

The specific type of nuclear power development in valve parameters are as follows:

Of ⑴ nuclear use cut-off valve:

Cut-off valve for auxiliary piping. The valve is usually three structures, the packed-type globe valve, electric control valve bellows-type globe valves and metal diaphragm globe valve. The valve medium to medium parameters (temperature, pressure) of water and steam; nominal diameter: DN10 ~ 150mm.

⑵ no stuffing box of the valve:

a hydraulically driven gate valve. The valve with its own pressure water pushes the piston to open or close the valve nominal diameter: DN350, 400mm; working pressure: PN17.5MPa; operating temperature: 315 ℃.

b Hermetic electric valve. The valve should be a special screen closed motor, planetary reduction gear through immersion in the work so that the gate for opening and closing movement. The valve nominal diameter: DN100 ~ 800mm; working pressure: PN2.5 ~ 45.0MPa; operating temperature: 200 ~ 500 ℃.

Note: The above two the stuffing gate advantages: no packing seal to avoid leakage points, while reducing energy consumption. Disadvantages: complex structure, a higher cost.

⑶ nuclear power with the Butterfly:

For the cooling system and containment of the butterfly valve in the transportation system of the air medium. The valve is usually three structures, that is coaxial direct-attached rubber lined butterfly valve, eccentric metal sealing butterfly valve, double acting (butterfly plate to disengage the sealing surface rotation before reversal) of the metal sealing butterfly valve. The valve of nominal diameter: DN ≤ 2500mm; Working pressure: PN <4.0MPa; operating temperature: 100 ~ 150 ℃. In addition, for the air duct system quick closing butterfly valve Nominal Diameter: DN400 ~ 1200mm as the direction of development.

⑷ nuclear power with a detector for pilot safety valve:

For the nuclear island systems with pilot safety valve of the detector. Shanghai valve with pilot safety valve, the detector can be sensitive to the relationship between pressure and spring force balance, to change the position to control the release of the principle of media contacts and charge, from the structure to avoid jamming. The valve is acting with spring preload and bellows sealed valve flap structure can ensure a reliable seal. The valve nominal diameter: DN600mm; working pressure: PN1.265MPa,.

⑸ nuclear power with a check valve isolation valve:

2 oil, natural gas wellhead valve

Parallel oil, natural gas wellhead valve is mainly in line with the U.S. API6A standard single gate or double plate, deflector or deflector of forged steel gate valve, slurry valve, self-regulating valve angle throttle valves, oil field parallel control valve, oilfield special straight-through check valve, water \\\\ special polymer parallel gate valve, clamp parallel gate valve, pilot safety valve and check valve.

Oil, natural gas wellhead valve of the nominal level API2000psi 3000psi, 5000psi, 10000psi, 15000psi, 20,000 psi; public nominal diameter DN46 ~ 228mm (113/16in ~ 9in); temperature grades K (-60 ~ 182 ℃ ,), L (-42 ~ 182 ℃), P (-29 ~ 182 ° C), R (room temperature), S (-18 to 166 ° C), T (-18 to 182 ° C), U (-18 to 121 ° C ), V (2 ~ 121 ℃); material requirements for the AA, BB, the CC, and DD, EE, FF, HH; material performance requirements according to 36K, 45K, 60K, 75K; product technical requirements according to PSL1 (product specification Level 1) , PSL2 (product specification grade 2), PSL3 (product norms Level 3), PSL4 (product specification Level 4).

Petroleum, natural gas long-distance pipeline valves

Oil, natural gas long-distance pipeline valves, mainly in line with the the API6D standards in the United States a single gate or double plate, deflector or deflector plate gate valve; forged or cast steel style, upload or welding fixed ball; oil seal or pressure balanced plug valves; Swing or butterfly valve, through the ball valve; pigging valve.

The valve of the nominal level for the CL150 (PN2.0MPa), CL300 (PN5.0MPa), CL400 (PN6.4MPa), CL600 (PN10.0MPa), CL900 (PN15.0MPa), CL1500 (PN25.0MPa), CL2500 (PN42.0MPa); nominal diameter of DN50 ~ 1500mm (2in to 60in); fire resistance test the technical requirements of ISO10497; valve pressure test according to ISO5208.

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shut-off valve effect

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Range Top Burner Valve – China Manufacturer
Thank you for inquiry my Range Top Burner Valve, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com
http://www.qus-gasvalve.com/key-Range-Top-Burner-Valve-21/

The role of shut-off valve:
    Shut-off valve (Cut off valve), also known as emergency shut-off valve, by definition, to cut off the flow of emergency when the

safety valve, shut-off valve are: hydraulic pneumatic emergency shut-off valve emergency shut-off valve ammonia gas emergency

shut-off valve emergency shut-off valve.

    Off valve with safety valve lift check valve to prevent the media back structure and the principles of internal structure with low

melting point (fusible) of the plug. The outside temperature ≥ 80C (fusible gold) melt, blocked airway pressure relief. Quickly shut off

valve to protect the tank system\\ s security.

    Shut-off valve designed for liquid ammonia, ammonia, gas piping or equipment design. The use of PTFE packing, sealing, reliable,

absolute material leakage. Sealing Teflon or nylon material using material on the valve body, with soft sealing, sealing reliable. With

explosion-proof solenoid valves, air vacuum filters, signal feedback switch to remote control valves for the production of work to

improve the safe, convenient, fast and efficient.

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alert – door to door scam gas valve

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Gas Grill Valves – China Manufacturer
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http://www.qus-gasvalve.com/key-Gas-Grill-Control-Valve-62/

    In the gas tank to install a valve, it will not leak to ensure their safety? New Year period, the two claimed to be commissioned by

the staff of gas street, big sell to the public this "safety valve." Reporter yesterday from the gas company in Shijiazhuang City,

confirmed that the company has never had to sell to the public safety valve, the majority of users to guard against fraud.

    According to a district west Leung introduced the afternoon of January 3, at home, suddenly a man and a woman, the other gas

equipment companies claiming to be the staff, the company and the city gas company signed an agreement, uniform for users to

install gas the safety valve. "They said that only a general gas valve, not enough to guarantee safety, the safety valve is installed, you

can ensure that the gas does not leak so safe." Leung told reporters, usually the mother alone at home cooking and more , listening

to the other side of this valve introduces high security, so they move the heart to spend 108 yuan installation of a "safety valve."

    However, after installation the valve formal invoice issued by the other party has not only provided a receipt and then left. Leung

soon found that receipt of the seal is not "gas company", but at a certain gas distribution equipment, and seals also appeared on the

actually spelling, including "burning" not a word is the word next to the fire. "If it is a regular official seal, may be spelling it how?" Ms

Leung then go out to recover quickly, but the other had not disappeared. Leung later learned from the neighbors, each other and

there is no "house to house" of publicity, but only a few households selected for each building door to door. For the so-called "safety

valve" is safe or not, Ms Leung did not mind the end: "After all, gas is not a joke, if installed, there are security risks and inferior

products, may be how to do ah?"

    At the same time, who lives in a high column, Ms. Lu district to call the newspaper, said that during the holiday season was the

name of the gas company to install the safety valve of the district, many residents to buy this valve.

    Afterward, the reporter repeatedly on the receipt by the other side of the phone trying to contact, but the phone number still

can not connect. Yesterday morning this reporter consulted the Shijiazhuang city gas companies. The company s staff, the company

has never been any unit or individual agreement, nor who will be commissioned to sell products door, so Ms Leung, who is certainly

not encountered gas company s regular staff or cooperative units.

    In addition, the staff told reporters that are equipped with pressure relief valve on the gas tank, when the user each time the

ventilation valve for professional staff will check, remind the user needs to be replaced: "the price of a valve about three $ 40, was

not in the hundred or more. "staff, the case against Leung and others, they can go to the ventilation station for a professional

installation of a new" safety valve "for checks, according to choose whether to remove .

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door salesman selling bad gas valve

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Gas Burner Valves – China Manufacturer
Thank you for inquiry my Gas Burner Valves, Tel: 086-0574-86196509, E-mail: chairman@nbqianshou.com
http://www.qus-gasvalve.com/key-Gas-Burner-Valves-36/

    \"To the residents by door check valve is leaking gas to sell inferior products, this approach is wrong.\" Recently, the Council

Pengjiang sand wei successfully resolved a complaint stand this kind of consumer disputes.

\"That day at noon, a claim that is Pengjiang Service employees of a gas man came to my house, that is to help check the gas valve to

see if there is leakage, he applied to the trachea with a detergent mouth examination, see the bubbles take out, said to me, a gas

leak valve, after which he gave me back into the value of a new gas valve $ 60 The man claimed the quality of the gas valve is

absolutely no problem. \"who lives in Xinhui District south corner Road Yip said that last year at 12:00 on October 22 in her home

around the scene.

\"There was a very big house gas smell …\" December 25, Yip returned home and found the house filled with a strong gas smell, she

then usually buy gas to the gas station reporting. Soon, the gas station to send instructors onsite inspection gas valve, the master

told Yip, she is a bad gas valve. The master put the original gas valve, gas smell immediately disappeared.

\"On the day around 17:30, I gave Pengjiang service department called to say that gas, because they change the gas valve leak, so I

request a return. A man answered the phone was answered, the data of goods sold has entered the computer database can not be

returned. \"After several phone calls with the gas service department after unsuccessful negotiations, Yip Pengjiang Council to stop

the sand wei complaints complaints.

Sand wei station staff in the complaint after receiving complaints about immediately to verify the situation between the two sides

confirmed that the situation reflected in the basic Yip true. Under the mediation of the staff, the gas service department finally

agreed to refund the $ 60 payment Yip, and on product quality problems Miss Xiang Ye apology.

Sand wei station staff to remind the public complaints, the general sales personnel to sell goods door is difficult to guarantee the

quality of the public if you want to buy gas bottles related accessories, it is best to major shopping malls and specialty stores, the

quality of these large stores of goods more secure.

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Classification and characteristics of trap

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Bbq Gas Valves – China Manufacturer
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http://www.qus-gasvalve.com/key-Bbq-Gas-Valves-61/

Steam trap is used for network and equipment, can automatically discharge condensate, air and other non-condensing gas, and blocking water vapor leak valve.
     Works according to the different steam traps, steam traps can be turned into Beijing De Taike the following three types:
     Machine type: rely on liquid condensate within the steam trap height changes and health action, including:
     Float: float a closed hollow sphere
     Exposure up Float: Float to open up the bucket 010-59430603
     Exposure down to float: float down the barrel for the opening
     Thermostatic type: changes depend on the temperature of liquid movement, including:
     Bimetal: Original as sensitive bimetal
     Steam Pressure: sensitive bellows or cartridge for the original, filled with volatile liquid inside
     Thermodynamic model: thermodynamic properties of liquid rely on changes in the action. http://www.dtyco.net
     Disc: Since the same pressure, liquid and gas flow rate is different from that produced by a different dynamic and static pressure, driven disc valve action
     Pulse: the temperature of the condensate due to the different poles thread through the orifice plate, orifice plate sitting between the two poles of different-shaped pressure driven valve action.

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