Discussion on the quality level of valve products

★ Valve product quality level domestic:

Although the domestic valve industry carried out the work of adopting international standards and joint design and joint development in the mid-1980s, and most of the products have adopted international standards and foreign advanced standards, due to the implementation gap, the current domestic valve products The quality level is still below the requirements of international standards. Mainly manifested in:

(1) The wall thickness of the blank is out of tolerance;

(2) The surface roughness of the casting is of poor quality;

(3) Poor casting size accuracy;

(4) The leakage phenomenon inside and outside the general valve is serious, and even some valves can not guarantee the reliable work during the inspection period;

(5) The variety of driving devices is small, the specifications are incomplete, and the reliability is poor, which cannot meet the needs of large-scale complete sets of equipment.

foreign:

The quality of foreign valve products can generally meet the requirements of API, JIS, BS and other standards, and the inherent quality of the casting blank is high, the precision is high, and it can be processed by special machine without refining, the appearance is beautiful, the casting is clear, and the sealing performance is good. Fillers and gaskets are available in a variety of sizes to meet different operating conditions. The automatic control valve performance parameters are stable, fully guaranteeing no leakage during use and accurate adjustment accuracy. The service life of universal valves can reach 1~2 maintenance periods or even longer.

★ Valve product price Valve product is a product with very low profit margin. Although the market price of valves has risen and lowered every year, the overall situation is relatively stable. The product prices of various enterprises basically follow the reference price of the valve industry compiled by China General Valve Industry Association. Due to fierce competition in the valve industry market, some manufacturers still implement the 1996 price to win users.

There are no industry-guided prices for new products and small batches of non-standard products, which are priced by the company itself. Only by developing high-tech products of high grades and producing small batches of non-standard products can we set high prices and be competitive.

In addition, state-owned, private, and collective enterprises paying extra attention to price, among which collective enterprises are concerned about the rise and fall of prices, followed by state-owned enterprises. Relatively speaking, joint ventures and foreign-invested companies do not put prices first when purchasing valves (these companies pay more attention to quality).

★ Valve product usage valve user industry is wide, can be divided into petroleum, petrochemical, chemical, electric power, water conservancy, metallurgy, urban construction, machinery, coal, food and other (of which, users of machinery and chemical industry care about valve market zui They also have higher requirements for valves.) In the current market, users use Zui Duo, Zui popular valve varieties for ball valves, globe valves, gate valves, safety valves; followed by butterfly valves and regulating valves; third check valve; fourth for pressure reducing valves, sewage valves and steam The trap; the fifth is the shut-off valve and the diaphragm valve; the sixth is the plug valve, the plunger valve and other valves. The amount of ball valve, globe valve, gate valve, safety valve and rear level valve is quite different, and its total output accounts for 63.6% of the output of various valves (in terms of production units per ton).

In the types of valves applied, there are many types of valves used in machinery, metallurgy, petrochemical, chemical, urban construction and other industries. Especially in the machinery industry, all kinds of valves are basically used. In addition to the machinery industry, safety valves are mainly used in chemical industry; butterfly valves are mainly used in petrochemicals and metallurgy; diaphragm valves are mainly used in metallurgy, electric power and chemical industry; check valves are mainly used in metallurgy, chemical and petrochemical; Chemicals; shut-off valves are mainly used in metallurgy, petrochemical, chemical and electric power; sewage valves are mainly used in petrochemicals and chemicals; ball valves are mainly used in petroleum, chemical and metallurgy; gate valves are mainly used in chemical, electric power and urban construction; regulating valves are mainly used in chemical industry. Metallurgy, electricity and food; plunger valves are mainly used in petrochemical and metallurgy; plug valves are mainly used in chemical and metallurgy; pressure reducing valves are mainly used in petrochemical, chemical and metallurgy; steam traps are mainly used in chemical and petrochemical industries.

As a general-purpose component, valves are widely used in various industries, but there are three main purposes for each industry:

1. Routine inspection is required;

2. New project support;

3. Emergency reserves.

Through the investigation and analysis of the valve market, in the next few years, the overall trend of valve demand is an upward trend, and the demand for valves with a large amount of products is growing steadily. Among them, several valves with large demand are: ball valve (15.5%), globe valve (12.9%), safety valve (12.5%), gate valve (12.5%), butterfly valve (10.6%), regulating valve (8.0%). ) and check valve (6.1%). These types of valves accounted for 46.7% of the varieties, and their demand reached 78%.

★ Valve product after-sales service in today's valve market, although valve quality and price are the first two factors considered by most companies (79.8% of users put quality first, and 5.8% of users put price first). However, after-sales service of valve products, as a key link in marketing management, has been widely used in many industries. The valve industry is no exception. Although it is still not perfect, the customer has requested this factor.

After-sales service methods include “three guarantees”, free installation, technical guidance and regular return visits. State-owned and private enterprises Zui hope that after-sales service includes the content of the "three guarantees" commitment; private enterprises and joint ventures zui hope that after-sales service can be installed free of charge; collective, private and foreign-funded enterprises hope that after-sales service can provide technical guidance; state-owned and joint ventures I hope that after-sales service can return to visit regularly

Since the “Three Guarantees” commitment, regular return visits and technical guidance are the after-sales service methods that are favored by most industries (free installation is not required for many companies), valve manufacturers should focus on providing high-quality after-sales service methods to meet users' needs. The demand for after-sales service.

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