[Video Introduction] Why is there a vent valve on a pressure gauge? What is its role?
WIKA pressure gauge
Many of WIKA's pressure gauges have a vent valve shaped like a yellow lever on the top of the case. I will explain what role it plays.
Many WIKA pressure gauges have a vent valve shaped like a yellow lever on the top of the case. The valve is closed upon delivery of the product, but in order for the pressure gauge to function correctly, the valve should be opened during the commissioning process. The internal pressure of a highly airtight pressure gauge can change due to temperature variations, such as direct sunlight. Changes in pressure within the case can lead to unacceptable deviations in the accuracy of the pressure gauge. Pressure compensation between the inside of the pressure gauge case and atmospheric pressure is performed by the vent valve. However, not all WIKA pressure gauges are equipped with a vent valve. If a higher protection rating is required, pressure compensation is performed through a diaphragm mounted on the back of the case. In pressure ranges above 16 bar, the measurement errors caused by pressure increases within the pressure gauge case can be ignored, and the pressure gauge operates within the specified accuracy. Why is the yellow lever closed? Pressure gauges are typically transported in a horizontal position. If the vent valve of a filled pressure gauge is left open, the filling liquid may leak out of the instrument. Please keep it closed during transport to prevent oil leakage.
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basic information
Many WIKA pressure gauges have a vent valve shaped like a yellow lever on the top of the case. The valve is closed when the product is delivered, but in order for the pressure gauge to function correctly, the valve should be opened during the commissioning process. The internal pressure of a highly airtight pressure gauge can change due to temperature variations, such as direct sunlight. Changes in pressure within the case can cause the accuracy deviation of the pressure gauge to become unacceptably large. Pressure compensation between the inside of the pressure gauge case and atmospheric pressure is performed by the vent valve. However, not all WIKA pressure gauges are equipped with a vent valve. If a higher protection rating is required, pressure compensation is done through a diaphragm mounted on the back of the case. In pressure ranges above 16 bar, the measurement error caused by pressure increases within the pressure gauge case can be ignored, and the pressure gauge operates within the specified accuracy. Why is the yellow lever closed? Pressure gauges are typically transported in a horizontal position. If the vent valve of a filled pressure gauge is left open, the filling liquid may leak out of the instrument. Please keep it closed during transport to prevent oil leakage.
Price information
3,000 yen to 500,000 yen Prices may vary depending on product specifications.
Price range
P2
Delivery Time
※2 to 3 months after placing the order
Applications/Examples of results
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Company information
"WIKA" is a global manufacturer of measurement instruments headquartered in Germany. For over 70 years, it has maintained a top-class market share in measurement instruments as a specialized manufacturer in the global market. It is the number one manufacturer in Europe for measurement instruments, including pressure gauges and thermometers, widely used in the manufacturing industry, such as plant equipment, and is among the top manufacturers in the world. Currently, it operates in over 40 countries worldwide and boasts a total workforce of 9,000 employees, making it a global company. The Japanese branch has seen a steady increase in performance and has a track record of transactions with major companies across a wide range of industries, including large heavy industry manufacturers. The brand power and product strength are so high that it is often said, "Measurement instruments are WIKA." With bases in over 40 countries, as Japanese companies become more active in expanding overseas, the demand has also increased, and the company's strength lies in its ability to handle everything, including follow-up after product installation. Because it offers a wide range of products not found in other competitors, it can provide comprehensive solutions to meet customer needs.