What are the forms of seals for chemical pumps?

　　What are the forms of chemical pump seals

　　Chemical pump sealing equipment is divided into two key categories: a static seal, a dynamic seal.

　　Static seals generally have a gasket seal. o-ring seal. O-ring seals. External thread seals and other forms, for static seals, usually only two forms of gaskets and seals.

　　The key to the dynamic seal is fine packing seal. Skeleton seal. Skeleton Seal. Labyrinth seal. Spiral seal. Power seals and mechanical equipment seals, etc., for dynamic seals, chemical pumps rarely use packing seals to mechanical seals are mainly mechanical seals, mechanical seals and single-end face and double-end face, balanced and unbalanced type, balanced for high-pressure media sealing (usually refers to the pressure is greater than 1.0MPa), double-end face mechanical seals are mainly used for high temperature, easy to crystalize, viscosity, containing particles, as well as toxic volatile media, double-end face Mechanical seals should be injected into the sealing cavity with isolation fluid, the pressure of which is generally higher than the medium pressure 0.07~0.1MPa.

　　1.O-ring

　　Vulcanized rubber O-ring is common in pumps, due to its simple shape, so the production and manufacture is very easy, low cost, no matter how large the overall specifications of the O-ring, its profile size is not large (will be millimeters) so the weight is lighter, fewer consumables, the operation method is simple, easy to install, easy to dismantle and install, the more obvious advantage also lies in the O-ring has excellent sealing working ability, the scope of application is very wide, static sealing pressure Up to 100MPa or more, dynamic seal up to 30Mpa. can be used -60 ~ 200 ℃ temperature, can be considered a variety of media use regulations. Thus, it has been more widely used in the development of water pumps.

　　2. Sealing gasket

　　Gasket is a centrifugal pump static seal of the basic components, the application range is very wide. Chemical pump conveying medium mainly according to the conveying medium. Temperature. Working pressure and corrosion and other factors.

　　3. Frame seal

　　The utility model simple structure, small specifications, low cost, easy maintenance, resistance torque is small, both to avoid media leakage, but also to avoid the outside world of dust and other harmful substances invasion, and a certain degree of compensation for the crushing point of the ability to work, but not pressure, so it is generally used for low-pressure chemical pumps.

　　4. External thread sealing

　　General chemical pumps use two methods, one is the external thread connection gasket seal, one is the external thread plus filling seal, both use a small diameter flange connection sealing place. Electric diaphragm pump with external threads connected to the gasket sealing seal is a gasket, and the external threads only play a role in pressurization.

　　5. Labyrinth seal

　　Program design is effective, well-produced and well-processed, the installation is intact. Higher speed, the labyrinth seal is actually very good. But in the specific application, so the chemical pump but there are many leaks, so in the chemical pump seal is rarely seen.

　　Recommended reading: several types of chemical pumps

　　6. Seal packing

　　The utility model is to have expansion and resilience of the filling material into the ferrule joint, the use of radial clamping force of the screw cap into the axial sealing force, so as to play a sealing role. This kind of sealing method is called packing seal, and this kind of filling material is called sealing packing. Because the packing seal structure form simple, easy to disassemble and replace. Excellent quality. Mixed speed ratio. Large working pressure. Wide range of media, widely used in the development of chemical pumps.

　　7.Drive seal

　　By operation, the chemical pump vice centrifugal impeller caused by the tension balances the main centrifugal impeller pressure pressure liquid level, and then complete the seal. Parking, the deputy centrifugal impeller failure, so you need another configuration of parking sealing equipment to deal with parking may cause chemical pump leakage. Simple structure, simple structure centrifugal impeller seal . Long service life, can be randomized to complete the operation of the chemical pump, and therefore often used in the chemical pump to transport pumps containing residual media.

　　8. Seal mechanical equipment

　　Currently the chemical pump field is more commonly used sealing method is mechanical equipment seals, it has a small amount of leakage, long service life and other advantages, so today's society mechanical equipment seals are the most important shaft sealing method of this type of equipment. Machinery and equipment seals, also known as bore seals, is by a small number of a pair of vertically divided by the inner bore of the rotating shaft, in the liquid pressure and compensate for the elasticity of the organization (or magnetic) under the action of the maintenance of the fit group of relative sliding produced by the prevention of liquid leakage of the equipment.

　　Chemical pump seal materials

　　Chemical pump static seal material is generally used fluoroelastomer, special circumstances before the use of PTFE material; mechanical seal dynamic and static ring material configuration is more critical, not carbide to carbide is the best, the price is high on the one hand, there is no hardness difference between the two is not reasonable, so it is best to differentiate according to the characteristics of the medium.