The situation of the domestic footwear industry is severe. The safety shoe company creates a brand for development.

The increase in people’s awareness of safety has prompted industrial companies to pay more and more attention to the issue of safe operations in production. According to European regulations, employers must provide employees with safety protection to ensure that employees work in a safe environment, and safety shoes are an important part of them. Safety shoes are high-tech and high-value-added footwear products. The production process requires high requirements for raw materials, auxiliary materials, chemical materials, and mechanical equipment. At present, many domestic shoe-making enterprises with a certain scale and grade have turned their sights on Safety shoes This market was previously occupied by developed countries.

After 20 years of rapid development, China's footwear industry is experiencing the most severe period of hardship. “Internationally, trade protection measures such as anti-dumping are frequent and international economic and trade conditions are deteriorating. Domestic and enterprises are facing RMB appreciation, rising labor costs, and rising raw material prices. The superposition of these factors makes China’s footwear industry breathless. Come,” said Xu Yong, vice president of the China Light Industry Federation.

Many domestic safety shoe companies have already felt the pain. Dongguan Huajian Group is the world's largest manufacturer of medium-to-high-end leather women's shoes. The world’s top 50 mid-to-high-end women's shoes have 15 brands of women's shoes. Under the severe situation, this shoe boss did not feel relieved. According to Huajian Footwear's export of a pair of ordinary shoes equivalent to US dollars, from 2006 to 2008, raw and auxiliary materials rose from US$10.05 to US$10.85, labor costs rose from US$2.23 to US$3.3, and utilities and transportation costs rose from US$0.18. By 0.23 U.S. dollars, although the total cost of office supplies, etc., was reduced by 0.32 U.S. dollars, the unit price for export gradually increased from 15 U.S. dollars to 16.2 U.S. dollars, but the gross profit of the company on a pair of shoes still dropped from 1.1 U.S. dollars to 0.7 U.S. dollars.

Many domestic safety shoe companies face the dilemma of falling profits and reduced orders. At the same time, however, it is even less optimistic that deep-level problems and conflicts in the industrial structure also affect and restrict the development of domestic shoe enterprises. The production enterprises are small and the industry has excess production capacity; export growth is mainly based on quantity, and the overall profit rate is low; the export market is too concentrated and can easily cause trade frictions; the domestic market is not standardized and the marketing methods are backward, etc. Upgraded pass.

New technologies and new materials help companies win the market

The changing safety footwear market is infiltrating the young labor force. These younger employees had only known to wear Nike and Reeboks shoes during their growth period. “When it enters the labor force and is asked to put on steel-clad boots, it will choose more sports shoes with steel baotou or sneakers with steel baotou rather than the old-fashioned 6-inch work boots.” Mark Morgan, director of footwear design at Wolverine in Rockford, Anju, said.

In fact, safety shoe suppliers say that younger, more populist buyers are promoting the importance of well-known brands in the market. More familiar brands, such as Cat, Harley-Davidson, and Skechers, are emerging in the work shoe market and use their brand recognition to help win a large group of young customers who are influenced by peer preferences or strongly influenced by lifestyle.

Thanks to the use of new technologies and materials, the safety shoes produced are much lighter than in the past. Sebes of Lehigh said that in many cases the weight of shoes has dropped by about 50%. Although it is often thought that work shoes are heavier due to the use of steel heads, he points out that the steel heads weigh only 1/8 oz. He said that the reason for the lighter boots is the change in the insole and the outsole. The use of synthetic materials in various types of shock-absorbing shoe inner soles and midsole materials and outsoles, and the use of more mesh materials and other lighter materials on the shoe uppers are more comfortable for shoes and lighter in weight. To the effect.

While more traditional safety shoes may have advantages in terms of durability, newer footwear also has its own advantages. "The old style work boots need to be worn for a long time and they are comfortable to wear," said Morgan. "And now, when you buy work boots, you're extremely comfortable when you wear them, and you don't need a long break-in." With increasingly fierce competition, the traditional industry market has become saturated. Product prices are also increasingly transparent. Manufacturers under the pressure of market competition, in pursuit of production profits, many times the use of human experience in the production quality process monitoring, and artificially neglected in the process of production quality testing requirements of the machine, resulting in a lot of people can not judge the quality of human experience Test items are often unqualified during testing, such as the adhesion test between the shoe upper and the sole and the adhesion test between the composite bottom layers, which are prone to fake stickers or dead glue. Quality stability and compliance are often not guaranteed.

Not only that, most of the manufacturers purchase materials, they are accustomed to relocate the collocations of sellers, resulting in the purchase of collocation materials often have congenital quality defects, resulting in unsatisfactory test results. In addition, when some manufacturers purchase materials, in order to reduce production costs, it is often preferred to purchase new materials or alternative materials, artificially neglect the stability and quality factors, resulting in fluctuating test results, such as the use of new PU leather upper instead of leather uppers , The adhesion test between shoe uppers and shoe soles is often unqualified. In such an unfavorable situation, shoe enterprises should achieve dual upgrades of management and technology, and design high-quality, more value-added safety shoes.

In the sales process, there are certain problems between the safety shoe company and the consumers. This also involves the problems of good faith and the interests. How to balance the contradiction between the two sides and achieve a win-win outcome, which requires companies to timely feedback and processing of product quality issues and consumer opinions. Solve the problems found in a timely manner. At the same time continue to improve product quality and meet consumer demand. To build a good brand image requires not only stable product quality and advanced production technology, but also good after-sales service is essential. The bargaining power and influence of a successful brand for a company's products are often unmatched by any tangible assets. Creating a brand, nurturing a brand, and strengthening technology research and development are the main means for safety shoe companies to compete in the next round of market competition.

Check Valves

A ball check valve is a check valve in which the closing member, the movable part to block the flow, is a spherical ball. In some ball check Valves, the ball is spring-loaded to help keep it shut. For those designs without a spring, reverse flow is required to move the ball toward the seat and create a seal. The interior surface of the main seats of ball check valves are more or less conically-tapered to guide the ball into the seat and form a positive seal when stopping reverse flow.

Ball check valves are often very small, simple, and cheap. They are commonly used in liquid or gel minipump dispenser spigots, spray devices, some rubber bulbs for pumping air, etc., manual air pumps and some other pumps, and refillable dispensing syringes. Although the balls are most often made of metal, they can be made of other materials, or in some specialized cases out of artificial ruby. High pressure HPLC pumps and similar applications commonly use small inlet and outlet ball check valves with both balls and seats made of artificial ruby, for both hardness and chemical resistance. After prolonged use, such check valves can eventually wear out or the seat can develop a crack, requiring replacement. Therefore, such valves are made to be replaceable, sometimes placed in a small plastic body tightly-fitted inside a metal fitting which can withstand high pressure and which is screwed into the pump head.

There are similar check valves where the disc is not a ball, but some other shape, such as a poppet energized by a spring. Ball check valves should not be confused with Ball Valves, which is a different type of valve in which a ball acts as a controllable rotor to stop or direct flow.

A diaphragm check valve uses a flexing rubber diaphragm positioned to create a normally-closed valve. Pressure on the upstream side must be greater than the pressure on the downstream side by a certain amount, known as the pressure differential, for the check valve to open allowing flow. Once positive pressure stops, the diaphragm automatically flexes back to its original closed position.

A swing check valve or tilting disc check valve is check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle. Although swing check valves can come in various sizes, large check valves are often swing check valves. The flapper valve in a flush-toilet mechanism is an example of this type of valve. Tank pressure holding it closed is overcome by manual lift of the flapper. It then remains open until the tank Drains and the flapper falls due to gravity. Another variation of this mechanism is the clapper valve, used in applications such firefighting and fire life safety systems. A hinged gate only remains open in the inflowing direction. The clapper valve often also has a spring that keeps the gate shut when there is no forward pressure. Another example is the backwater valve (for sanitary drainage system) that protects against flooding caused by return flow of sewage waters. Such risk occurs most often in sanitary drainage systems connected to combined sewerage systems and in rainwater drainage systems. It may be caused by intense rainfall, thaw or flood.

A stop-check valve is a check valve with override control to stop flow regardless of flow direction or pressure. In addition to closing in response to backflow or insufficient forward pressure (normal check-valve behavior), it can also be deliberately shut by an external mechanism, thereby preventing any flow regardless of forward pressure.

A lift-check valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. When the pressure is no longer higher, gravity or higher downstream pressure will cause the disc to lower onto its seat, shutting the valve to stop reverse flow.

An in-line check valve is a check valve similar to the lift check valve. However, this valve generally has a spring that will 'lift' when there is pressure on the upstream side of the valve. The pressure needed on the upstream side of the valve to overcome the spring tension is called the 'cracking pressure'. When the pressure going through the valve goes below the cracking pressure, the spring will close the valve to prevent back-flow in the process.

A duckbill valve is a check valve in which flow proceeds through a soft tube that protrudes into the downstream side. Back-pressure collapses this tube, cutting off flow.

A pneumatic non-return valve.

Multiple check valves can be connected in series. For example, a double check valve is often used as a backflow prevention device to keep potentially contaminated water from siphoning back into municipal water supply lines. There are also double ball check valves in which there are two ball/seat combinations sequentially in the same body to ensure positive leak-tight shutoff when blocking reverse flow; and piston check valves, wafer check valves, and ball-and-cone check valves.

Check Valves, Water Check Valves, Brass Check Valves, Sanitary Check Valves

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