Petroleum Ultrasonic Tester Seals

Performance requirements

Petroleum ultrasonic detector seals must be able to operate under extreme conditions, including high temperatures and pressures. They need to have excellent chemical resistance and the ability to maintain performance at ultra-low temperatures. These seals effectively control wear and friction while maintaining precise tolerance control.

Testing capabilities

Seals need to meet specific test protocols, including high-pressure, high-temperature, low-leakage, and ultra-low-temperature testing. These tests ensure that the seals are able to maintain their performance and integrity under extreme conditions.

Material properties

The high-performance spring-loaded energy storage seals can operate in temperatures ranging from -253 °C to +365 °C, withstand pressures of up to 3,448 bar, and feature small, controlled friction and extensive chemical resistance. PTFE rotary lip seals and filler compounds are also widely used due to their wide temperature range and chemical resistance.

Material selection

Rubber

such as nitrile rubber (NBR), which has good oil resistance, wear resistance, and chemical corrosion resistance, can maintain sealing performance for a long time in the petroleum environment, and the price is relatively low and is one of the commonly used materials for the seal of petroleum ultrasonic detector.

Fluoroelastomer (FKM)

It has excellent high-temperature, oil, chemical, and aging resistance. It can maintain good elasticity and sealing performance in a wide range of temperatures. It is suitable for some petroleum ultrasonic detectors with high sealing requirements and harsh working environments.

Silicone rubber

It has good high and low-temperature resistance, ozone resistance, and electrical insulation, but its oil resistance is relatively poor. It is generally used in occasions with low oil resistance requirements but high-temperature adaptability requirements, such as some instruments working in cold or high-temperature environments.

Polyurethane rubber

It has high hardness, high strength, high wear resistance, and good oil resistance, but its hydrolysis resistance and temperature resistance are relatively limited, and it is often used in some sealing parts that need to withstand greater pressure and friction.

Common types

O-type sealing ring

It is a kind of annular seal with a circular cross-section, which has the advantages of simple structure, easy installation, and good sealing performance, and is widely used in various static seals and reciprocating motion sealing parts of petroleum ultrasonic detectors, such as the sealing of instrument shells, the sealing of probes and instrument connection parts, etc.

Rectangular sealing ring

The cross-section is rectangular, which is usually used in occasions that require a larger sealing area or higher sealing pressure, such as sealing large cavities inside the instrument or sealing in the hydraulic system with high pressure.

Lip sealing ring

It has one or more lip structures, which can better fit the sealing surface under pressure and achieve a good one-way or two-way sealing effect, and is often used for the sealing of rotating shafts or reciprocating motion shafts, such as the sealing of motor shafts and transmission rods in instruments.

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