ISO Standard Bimetal Coil Spring for Auto Cooling System

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.

Bimetal coil spring consists of two or more metallic strips with different thermal expansion bonded together. When heated up, it bends in a pre-determined manner and can be used to monitor, measure and regulate temperature.

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.

Springs are preferred for measuring ambient temperatures (room temperature, sauna thermometer).

Thermostatic bi-metals 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

The bimetal  coil spring's  main applications are in the thermostats for heating chamber or fan clutch of the heavy vehicles and high-end cars.

The bimetal coil spring  is also widely used in temperature control device,  temperature protection device, temperature indicator system and temperature detection device of home appliances, temperature instruments, automobiles, machinery,etc.

Bimetal is also manufactured as disc material to very close tolerances which give a snap action at a given.

We are offering different type of thermostatic bimetals according to your demands.

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.

1. 16 years experiences and professional R&D team provides you professional development proposal and customized product.

2. 1.000.000 times fatigue testing ensures the reliable performance

3. From beginning to end, from sample to shipping, we can handle your entire project, which makes your business easier.

4. ISO certified, Supplier of Kohler CO, Exclusive supplier of China FAW Group Corporation, this is how we keep good quality and reliable cooperaion for global valued customers.

1. Confirming the product technical parameter and other details

2. Samples making, safety test and performance test

3. Client approve the sample and place order

4. Client makes the payment

5. Goods production, safety test and performance test

6. Arranging the shipment

7. Supplier arrange necessary documents and send copy of these documents

8. Tracing the goods until the client has received the goods

9. After-sale quality track