Acidproof alkali pump seal what kind, what is action?

Resistance to acid and alkali water pump is commonly used in the chemical industry water pump, because of the particularity of transmission medium, the leakage to avoid unnecessary trouble, the selection of sealing ring is key, there are many kinds of the types of sealing ring material, different types of seal effect is also different, common seal is sealing ring, also known as oil seal, have the effect of isolated oil, prevent oil overflow or through. Commonly used in the hydraulic oil seal and the following types: dust ring, piston rod sealing ring, sealing ring buffer, guiding support ring, the end cover sealing ring and piston ring. One, the end cover sealing ring end cover sealing ring used in oil cylinder end cover seal between the cylinder wall, is a kind of static seal, used to prevent the hydraulic oil from the end cover and the clearance leakage of cylinder wall. Are usually made of nitrile rubber o-ring and support ring ( Retaining ring) Composition. Second, the piston ring piston sealing ring is used to isolate the two hydraulic cylinder chamber, is a main hydraulic cylinder seals. Usually a two-piece, outer ring made from ptfe or nylon, inner ring made of nitrile rubber. Also there are many variants, including using coated with teflon bronze, and so on. On the monoculture oil cylinder, polyurethane (pu) U have a cup. Three, shield shield is installed on the outer edge of the hydraulic cylinder end cover, to prevent external contaminants into the cylinder, can be divided into the card into the type according to installation and pressure into the type. 1, the basic form of card into the type shield card into the dustproof ring is the most common type, as the name implies, dustproof grooves in the ring card on the inner wall of the end cover, for less harsh environmental conditions. Card into the type of shield material for polyurethane, usually structure has many variants, such as H and K type section for lips structure, but plus ca change. 2, pressure into the type shield used in rigid, under the condition of heavy load, not card in the groove, but pu materials with a layer of metal to increase its strength, pressure into the hydraulic cylinder end cover. Pressure in shield also has a variety of forms, also single lip and lips. Four, cushion sealing ring seal as auxiliary piston rod sealing ring, for protect the piston rod in the system pressure increases suddenly. There are three common types of buffer sealing ring. Type A is made of polyurethane sheet sealing ring. Type B and C for the two type, used to prevent seal extrusion, allows the seal to withstand higher pressure. Guiding support ring guiding support ring is installed on the hydraulic cylinder cover and piston, used to support the piston rod and the piston, guide the piston to do rectilinear motion, prevent metal to metal contact. Materials such as plastic and coated with teflon bronze. Five, the piston rod sealing ring piston rod sealing ring is also known as U cup, is the main piston rod seals, installed on the inside of the hydraulic cylinder end cover, role is to prevent the hydraulic oil leakage. Piston rod sealing ring by nitrile rubber, polyurethane or in some cases, the need and support ring ( Also called collar) Used together, support ring used to prevent seal extrusion pressure. The piston rod sealing ring has many variations.
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