OBP 20 PSI Chrome Top Header Tank or Radiator Pressure Cap OBPPC004
The OBP 20 PSI Chrome Top Header Tank or Radiator Pressure Cap OBPPC004 is a specialized automotive component designed to maintain optimal pressure within a vehicle’s cooling system. Featuring a durable chrome-plated finish, this cap offers both corrosion resistance and a polished, professional appearance. The cap is engineered to fit header tanks or radiators that require a 20 PSI pressure rating, helping to ensure the system operates efficiently by preventing coolant loss and maintaining the correct boiling point. Its robust construction typically includes a secure sealing mechanism to minimize leaks and withstand the demands of high-temperature environments. The OBPPC004 is suitable for use in a variety of automotive applications where a reliable and visually appealing pressure cap is needed, making it a practical choice for both performance and standard vehicles.
Header Tank or Radiator Pressure Cap
THIS IS A 20 PSI CAP
1. Seals the top of the radiator filler neck to prevent leakage.
2. Pressurizes system to raise boiling point of coolant.
3. Relieves excess pressure to protect against system damage.
4. In a closed system, it allows coolant flow into and from the coolant reservoir.
The radiator cap pressure valve consists of a spring-loaded disc that contacts the filler neck. The spring pushes the valve into the neck to form a seal. Under pressure, the boiling point of water increases. Normally water boils at 212°F. However, for every pound of pressure increase, the boiling point goes up 3°F.
If the engine overheats and the pressure exceeds the cap rating, the pressure valve opens. Excess pressure forces coolant out of the overflow tube and into the reservoir or onto the ground. This prevents high pressure from rupturing the radiator, gaskets, seals, or hoses.
CAUTION
Always remove the radiator cap slowly and carefully. Removing the radiator cap from a hot pressurized system can cause serious burns from escaping steam and coolant.