The valve flange seal connection between the contact parts according to the design requirements placed gasket, relying on the bolt to produce pre-tightening force to achieve a sufficient pressure, to prevent media leakage to the outside. Gasket materials and structures are: rubber gasket, asbestos rubber gasket, graphite gasket, stainless steel and graphite wound gasket, corrugated pipe and metal gasket. Gasket seal is a mandatory seal. Common flange leaks are the following species: a. Interface leaks - leaks between the seal and the face of the flange. The main reason: the gasket preload is not enough ----- Treatment: Appropriate to increase the preload; Flange sealing surface does not match the requirements of roughness - Remedy: Flange surface is uneven or horizontal scratches - Remedy: Rework; cold and hot deformation and mechanical vibration, etc. --- Remedy: improve the environment or material selection; flange connection bolt deformation elongation ---- treatment: materials and can not exceed the allowable torque; seal Long-term use of gasket plastic deformation - Treatment: replacement; gasket aging, cracking and deterioration --- Treatment: replacement. b. Penetration Leakage - - The media creates a leak through the gasket material gap under pressure. The main reason: with the gasket material; media pressure; media temperature; gasket aging, cracking and deterioration. c. Leakage - Leakage due to over-compression of the gasket due to mounting quality or insufficient seal pressure. Main reasons: the installation of gasket bias, the local seal than the lack of pressure or preload is too large, loss of resilience; flange connection bolts elastic uneven; two flange concentricity (centerline offset) skew ; Gasket selection wrong or not according to working conditions, the correct selection of gasket material and type; interface leakage and damage leakage will significantly increase over time, the leakage of leakage and the relationship between the time is not obvious. (If reproduced, please indicate source)
Chrome Yellow
chrome yellow has high bright yellow pigment, and high hiding powder, well tinting strength, heat-resistance,etc advantages, non-toxic, etc.
Usage:
1. Used in kinds of paints, including water-soluble paint for outside and inside wall, and oil paint including kinds of first coat and face coat such as epoxy, alkyd, amine etc.
2. Used in coloration for construction materials, i.e. mosaic brick, levigation level ground, concrete production, brick for pavement, colorful tiles and man-made marble, etc.
3. Used in coloration for colorful paper.
4. Used in surface coloration for rubber production, and strengthen the abrasion resistance of rubber filling.
5. Used in coloration for plastics, which is harder to fade.
6. Used in detecting the damage degree of machine by its magnetism.
Chrome Yellow,Chrome Yellow Pigment,Chrome Yellow Color,Middle Chrome Yellow
Yucheng Jinhe Industrial Co.,Ltd , https://www.hncarbonblack.com
