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Wuhu Boton Automobile Parts Factory is a professional manufacturer with Boton brand and self-developement capacity. Our core competencies is thermostatic bimetal components, thermometer, jumping disc toys, heating chamber for engine carburetors, auto generator regulars,various auto glass lifter motor protector.
Our enterprise culture is Industry And Rejuvenation , Loyalty And Devotion .My own faith is Never late than never !
Custom Thermal Flat Coil Spring
Coiling of the thermostatic bimetal achieves greater “active length” within a small space, thus maximizing the possible displacement.
One end of the spiral /helical coil is permanently fixed .the loose end describes a rotary path in response to a change in temperature.
The choice between a spiral or a helical coil depends on the intended application.
Spirals are preferred for measuring ambient temperatures (room temperature, sauna thermometer).
Thermostatic bimetals have been standardized in a number of countries.
The relevant standards usually contain data on materials, their properties, dimensions, shapes
and tolerances, as well as test specification and, in some cases, references to other general test standards. Major standards are below:
Germany:
DIN1715 part 1 ,
thermostat metals ; Technical delivery conditions.
DIN1715 part 12,
thermostat metals ; Testing the specific thermal curvature.
SEW 385
Eisenlegierungen mit besonderer wärmeausdehnung
USA:
ASTM B 388
Standard specification for Thermostat Metal Sheet and Strip.
ASTM B 753
Standard specification for Thermostat Component Alloys.
ASTM B 106
Test Method for Flexivity of Thermostat Metals.
Japan:
JIS C 2530
Thermostat Metals for electric apparatus .
Russia:
GOST 10533
Cold-rolled thermostatic bimetallic strip. Specifications
GOST 10994
Precision alloys. Grades
China
GB/T 4461
Thermostatic bimetal strips
Brand : TB 208/110 | |
Composition | MnCu18Ni10/FeNi36 |
Specific thermal curvature/flexivity(20 to 130°C) | K=39.0 10-6 /k ±5% |
Specific thermal deflection (20 to 100°C) | α=20.8 10-6/k |
Electrical resistivity | ρ=1.10μΩm±5% |
Linearity range | -20 to 200°C |
Useful deflection temperature range | -70 to 250°C |
Recommended maximum operating temperature | 350°C |
Density(at 20°C) | γ=7.7g/cm2 |
Vickers hardness : high expansion side low expansion side | HV=180 to 260 HV=190 to 270 |
Modulus of elasticity (at 20°C) | E=145000MPa |
Permissible bending stress (at 20°C) | σperm =200 MPa |
Thermal conductivity (at 20°C) | λ=6W/m K |
Specific heat capacity (at 20°C) | C=0.46 KJ/Kg K |
Thermal deflection rate, is the ratio of angular rotation to temperature change,T is a measure of the coils thermal activity .
The equation D= (A2-A1) / (T 2—T1). Where A2 and A1 are angular positions at temperature T2 andT1 respectively.
Related Bimetals
Here are our bimetal sprils/ coils, bimetal strip and bimetallic jumping discs !
Our factory have perfect R&Ddepartment . your specified products can be produced according to your drawing or sample !
Our marketing:
overseas:BMW;AUDI;BENZ;NISSAN;TOYOTA;MITSUBISHI;HONDA;ISUZU;STEYR
domestic:No.1,No2, Brilliance Group, Jiang steam, Beiqi Fukuda, Baoding-greatwall,Cherokee,steyr , Yuchai, Isuzu
If you trust us ,we will be good partner . I hope to have successful cooperation with you. Contact me !!!!
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