Stainless steel discharge valve installation and maintenance

1, the discharge valve should be stored in a ventilated and dry warehouse as a whole, non-stacking or open storage, the valve diameter at both ends of the board to be blocked. 2, according to the media performance and life, should always check the top of the valve body PTFE ring and orifice Department of PTFE sheet. If found to be damaged should be replaced and re-used. 3, before installation should pay attention to the various departments of the screw force balance, lifting (activities) is flexible. 4, unfolding the discharge valve to be carefully checked before installation of the valve, and clear the valve internal transport, storage damage caused during the process. 5, when the material is blocked, you can use the metal rod or hard tools to clear, pay attention to the use of metal rods or hard tools do not damage the disc and seal contact surface. 6, discharge valve should try to avoid the alternating use of acid-base medium (except in the reaction medium), so as not to shorten the life. 7, the next show-style discharge valve should be installed in the absence of severe vibration and impact of the place, and the use of the valve without damage to the site. 8, if the valve surface is found to be damaged immediately, you can use special materials to repair the affected area, or commissioned by the production units.

The transparency of the Plastic Injection transparent shell matrix resin itself has a great influence on the transparency of PP plastic products. In order to improve PP transparency, a small amount of polyacrylate resin with good transparency and compatibility can be added.
(1) the inorganic nucleating agent mainly consists of ultra-fine talc powder and SiO2, and also includes calcium carbonate, mica powder, inorganic pigments and fillers, etc., which is cheap in price and rich in source, but has certain influence on the gloss and transparency of the products.

(2) organic nucleating agent organic nucleating agent is a kind of organics with low relative molecular weight, represented by sorbitol and its derivatives. It has good compatibility with matrix resin and can significantly improve product transparency and surface gloss.

(3) in the case of sorbitol, when the amount of nucleating agent exceeds 0.3%, the effect of transparency improvement is not obvious, and even decreases. However, when the dosage is less than 0.2%, the nucleation quantity is insufficient and the transparency is not increased enough. It can be seen that the amount of nucleating agent should be between 0.2-0.3%. Therefore, suitable nucleating agent content can better improve the transparency of PP.

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