PIAA Radiator Valve
[Safety button type]
Prevents overheating/improves cooling effect for engine comfort
Radiator valves are part of a cooling system that prevents power down and ensures responsive and stable power even in extreme conditions such as long periods of time driving with a high rotation range of high power engines. Radiator valves play a very important role in this system.

[1] Enhance the cooling effect of your cooling system.
Cooling system that circulates around the engine to cool the internal combustion engine and cools the heat of the coolant water by radiator. Turn the radiator inside high pressure above atmospheric pressure (98 kPa). Because the radiators cooling effect (heat dissipation capability) is proportionate to the temperature of the coolant water.
The higher the temperature of the coolant water, the greater the radiator heat dissipation. The radiator valve boiling water at atmospheric pressure of 100 degrees Celsius is made to increase the pressure inside the radiator so it does not boil up until it reaches temperatures above 220 degrees Celsius, and the temperature difference between the outside air and the heat dissipation capacity is greatly increased.
As a result, the cooling system is kept to the limit.
[2] Perfectly maintains the cooling effect of your cooling system.
PIAA radiator valve reinforces the main pressure valve spring and always maintain the proper pressure inside the radiator to function the cooling system.
When the internal temperature rises, the main pressure valve activates and adjusts the pressure when it reaches high pressure.
When the internal temperature is reduced, negative pressure valve activates and adjusts the pressure.
This results in maintaining the cooling effect of the cooling system and backup the high performance and high power of the engine.

From the Manufacturer

PIAA Radiator Valve (Safety Button Type)

Equipped with a safety button to prevent the accident of hot water when opening.

A cooling system that prevents power down even in extreme conditions such as long periods of time riding and ensures response, stable and power.Radiator valves play an important role in this system.

Cooling system that circulates around the engine to cool internal combustion organs and cools hot water by radiator.The radiator valve has a high pressure inside the radiator, so it does not boil the cooling water until it reaches a temperature of over 120 degrees Celsius.As a result, the temperature difference between outside air increases the radiator heat dissipation capability, and the cooling system has been increased.

As the internal temperature rises, the main pressure valve operates and adjusts pressure when it is high pressure.Negative pressure valve operates when low pressure is reached with internal reduction.Radiator valve reinforces the mainstream valve spring and allows the pressure inside the radiator to be properly positioned.This results in maintaining the cooling effect of the cooling system and backup the high performance and high power of the engine.

	Safety Button Type SV51S	Safety Button Type SV52S	Safety Button Type SV53S	Safety Button Type SV54S	Safety Button Type SV55S	Safety Button Type SV56S
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Customer Reviews	4.0 out of 5 stars 6	4.3 out of 5 stars 19	4.5 out of 5 stars 106	4.2 out of 5 stars 87	4.2 out of 5 stars 33	4.3 out of 5 stars 149
Price	—	—	¥1,058¥1,058	—	¥1,600¥1,600	—
Item No.	SV51S	SV52S	SV53S	SV54S	SV55S	SV56S
Pressure Pressure Pressure	88 kPa	88 kPa	88 kPa	108 kPa	88 kPa	108 kPa
Fitment	Please check the radiator valve application chart.	Please check the radiator valve application chart.	Please check the radiator valve application chart.	Please check the radiator valve application chart.	Please check the radiator valve application chart.	Please check the radiator valve application chart.