Category
Solenoid Valve Supplier
inquiry@ato.com.cnSolenoid Valve Seal Materials
Solenoid valve refers to the valve with closed cavity, through holes in
different positions. Each hole is connected with different tubing. A
piston is in the middle of cavity, two electromagnets on both sides of
piston. The magnet coil on which side is energized and the valve body
will be attracted to that side. Different oil drain holes is opened or
closed by controlling the movement of the valve body. In this way, the
mechanical motion is controlled by turning the current on and off of the
electromagnet in the solenoid valve.
The solenoid valve is widely used in the pipeline of automatic system. The material of solenoid valves should be selected according to the medium characteristics, pressure and temperature in different working conditions. Then let us analyze how to select the material and sealing material of solenoid valve body combined with the use temperature of the medium.
Solenoid valve body materials
Under normal temperature, without corrosive fluid and under the general pressure of 0.8MPa, the solenoid valve body is chosen from cast iron, cast steel, cast copper, aluminum alloy, plastic and other materials. The solenoid valve body adopts cast steel, cast copper, copper aluminum alloy and stainless steel without corrosive fluid and under the general pressure from 0.8 to 5MPa at normal temperature. Stainless steel is selected for solenoid valves without corrosive fluid and above 5MPa pressure at room temperature.
Solenoid valve seal materials
1. Nitrile -butadiene rubber (NBR)
NBR is mainly produced by low temperature emulsion polymerization, which has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. Its shortcomings are poor low temperature resistance, poor ozone resistance, poor electrical performance and slightly low elasticity.
In addition, it has good water resistance, air tightness and strong adhesion properties. Nitrile-butadiene rubber (NBR) has excellent oil resistance, which is second only to polysulfide rubber and fluorine rubber. But it is not resistant to ozone and aromatic, halogenated hydrocarbon, ketone and ester solvents, so it is not suitable for insulating materials.
As an essential elastic material, it is widely used in the manufacture of various oil-resistant rubber products, oil-resistant gaskets, gaskets, sleeves, soft packaging, soft rubber hoses, printing and dyeing cots, cable rubber materials, etc., in the automotive, aviation, petroleum, copying and other industries. ATO solenoid valves mainly adopts NBR as seal materials.
NBR is mainly used to produce oil-resistant products, such as oil-resistant tubing, tape, rubber diaphragm and large oil bladders, etc. It is often used in the production of various oil-resistant molded products, such as o-rings, oil seals, leather bowls, diaphragms, valves, bellows, etc., and also used to make rubber sheets and wear -resistant parts.
2. Ethylene-Propylene-Diene Monomer (EPDM)
EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. The main characteristic of EPDM is its superior resistance to oxidation, ozone and erosion. As EPDM belongs to the polyolefin family, it has excellent vulcanization properties. EPDM has the lowest proportion of all rubber. It can absorb a large number of fillers and oils and has little effect on its properties. Therefore, low-cost rubber compounds can be produced. This EPDM is used as the seal material of steam solenoid valve.
3. Fluororubber (FKM)
Fluororubber is superior to silicone rubber in high temperature, and has good chemical resistance, resistance to most oils and solvents (except ketones and esters), weather resistance and ozone resistance, but poor cold resistance. Fluorine rubber is widely used in locomotives, Class B products and chemical plant seals. The working temperature ranges from - 20℃ to 260℃, and low temperature resistance type can be used to - 40℃, but the price is higher.
The solenoid valve is widely used in the pipeline of automatic system. The material of solenoid valves should be selected according to the medium characteristics, pressure and temperature in different working conditions. Then let us analyze how to select the material and sealing material of solenoid valve body combined with the use temperature of the medium.
Solenoid valve body materials
Under normal temperature, without corrosive fluid and under the general pressure of 0.8MPa, the solenoid valve body is chosen from cast iron, cast steel, cast copper, aluminum alloy, plastic and other materials. The solenoid valve body adopts cast steel, cast copper, copper aluminum alloy and stainless steel without corrosive fluid and under the general pressure from 0.8 to 5MPa at normal temperature. Stainless steel is selected for solenoid valves without corrosive fluid and above 5MPa pressure at room temperature.
Solenoid valve seal materials
1. Nitrile -butadiene rubber (NBR)
NBR is mainly produced by low temperature emulsion polymerization, which has excellent oil resistance, high wear resistance, good heat resistance and strong adhesion. Its shortcomings are poor low temperature resistance, poor ozone resistance, poor electrical performance and slightly low elasticity.
In addition, it has good water resistance, air tightness and strong adhesion properties. Nitrile-butadiene rubber (NBR) has excellent oil resistance, which is second only to polysulfide rubber and fluorine rubber. But it is not resistant to ozone and aromatic, halogenated hydrocarbon, ketone and ester solvents, so it is not suitable for insulating materials.
As an essential elastic material, it is widely used in the manufacture of various oil-resistant rubber products, oil-resistant gaskets, gaskets, sleeves, soft packaging, soft rubber hoses, printing and dyeing cots, cable rubber materials, etc., in the automotive, aviation, petroleum, copying and other industries. ATO solenoid valves mainly adopts NBR as seal materials.
NBR is mainly used to produce oil-resistant products, such as oil-resistant tubing, tape, rubber diaphragm and large oil bladders, etc. It is often used in the production of various oil-resistant molded products, such as o-rings, oil seals, leather bowls, diaphragms, valves, bellows, etc., and also used to make rubber sheets and wear -resistant parts.
2. Ethylene-Propylene-Diene Monomer (EPDM)
EPDM is a terpolymer of ethylene, propylene and non-conjugated diene. The main characteristic of EPDM is its superior resistance to oxidation, ozone and erosion. As EPDM belongs to the polyolefin family, it has excellent vulcanization properties. EPDM has the lowest proportion of all rubber. It can absorb a large number of fillers and oils and has little effect on its properties. Therefore, low-cost rubber compounds can be produced. This EPDM is used as the seal material of steam solenoid valve.
3. Fluororubber (FKM)
Fluororubber is superior to silicone rubber in high temperature, and has good chemical resistance, resistance to most oils and solvents (except ketones and esters), weather resistance and ozone resistance, but poor cold resistance. Fluorine rubber is widely used in locomotives, Class B products and chemical plant seals. The working temperature ranges from - 20℃ to 260℃, and low temperature resistance type can be used to - 40℃, but the price is higher.
Post a Comment:
You may also like:
