How to distinguish single gate and double gate valve

Gate valve plate Several forms of gate valve according to the structure of the gate is divided into two types of wedge and parallel. Wedge gate has three kinds of structure: Single gate structure (Figure 1) is relatively simple, but the wedge angle machining accuracy requirements are high, prone to clamping, abrasion phenomenon; double gate (Figure 2a) Wedge angle less demanding, the gate wedge is not easy to die, but the structure is more complex; elastic gate (Figure 2b) combines the advantages of single and double gate, to avoid their shortcomings, and thus more widely used. Its structural feature is the presence of an annular groove in the periphery of the gate, so that the gate has the appropriate flexibility. Parallel gate valve is usually double gate structure (Figure 2c); special purpose gate valve, such as long-distance oil transmission, gas pipeline with large-diameter gate valve for cleaning and the need for a single gate structure. How to distinguish between single-gate and dual-gate valve valve models can distinguish, such as: Z41Y-16, DN150 is a single gate flange valve, nominal diameter 150, the sealing surface material is carbide. The Z42-16, DN150 is a double gate valve, the other parameters are exactly the same. Judging from the appearance of crude judgment, double gate valve seal protruding part is greater than a single gate. How to distinguish single-gate and double-gate valve Single-gate valve is the most common, the price is lower, the technology is mature, reliable sealing Keywords: gate valve

Graphite Powder soft, dark gray; greasy feeling, can contaminate the paper. Hardness of 1 to 2, along the vertical direction with the increase in the hardness of the hardness can be increased to 3 to 5. Specific gravity of 1.9 to 2.3. In the isolated oxygen conditions, the melting point of more than 3000 ℃, is one of the most resistant minerals. At room temperature, the chemical properties of Graphite powder is relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; materials with high temperature conductive properties, do refractory materials, conductive materials, wear-resistant lubricating materials.

Graphite powder is widely used, according to its different use, we can be divided into the following categories of graphite powder

1. Scale graphite powder

Flake Graphite powder is the most widely used, but also processed into other graphite powder of the original material, scaly graphite powder specifications from 32 to -12000 mesh range, scaly graphite powder toughness is good, with good thermal conductivity and corrosion resistance, can be used as refractory Materials, wear-resistant lubricating materials, conductive materials, casting, Fansha, die and high temperature metallurgical materials

2. colloidal graphite powder

Colloidal graphite is formed by the average dispersion of graphite particles below 2u meters in an organic solvent. Colloidal graphite is a viscous suspension of black filaments. Colloidal graphite powder with high quality natural flake graphite performance, in high temperature conditions with special oxidation resistance, self-lubricating and plasticity, at the same time with good conductivity, thermal conductivity and adhesion, mainly used in sealing, metallurgical stripping and other industries

3. Ultrafine graphite powder

Ultrafine graphite powder specifications are generally between 8000 mesh -10000 mesh, mainly used in powder metallurgy release agent, the production of graphite crucible, the battery anode and make conductive materials additives

4, nano-graphite powder

Nano-graphite powder main specifications for the D30 50 100 400 nm, nano-graphite powder process is more complex, low production rate, so relatively high prices, mainly used in anti-corrosion coatings, lubricants additives, grease additives, precision graphite seal And other industries, in addition, nano-graphite powder in scientific research institutions also has a high application value

5, High Purity Graphite powder

 

Graphite Powder

Graphite Powder,Nano-Graphite Powder,Graphite Carbon,Carbon Brush For Graphite Powder

Fengcheng Ruixing Carbon Products Co., Ltd , https://www.lnfcrxts.com