силиконовый резиновый рукав: свойства, применение и обслуживание

что такое силиконовая резиновая манжета?

Силиконовый резиновый рукав — это гибкое трубчатое покрытие, изготовленное из силиконовых эластомеров, предназначенное для защиты, изоляции и герметизации от воздействия окружающей среды для различных компонентов. Эти рукава обладают исключительной термостойкостью, химической стойкостью и электроизоляционными свойствами, что делает их идеальными для требовательных применений в различных отраслях промышленности.

applications of silicone rubber sleeves

the unique combination of properties makes silicone rubber sleeves suitable for numerous industrial and commercial applications:

1. electrical insulation

in high-voltage applications, silicone sleeves provide >1012 Ω·cm volume resistivity, preventing current leakage and arc tracking. they're used for:

• bus bar insulation in switchgear (up to 36 kv systems)

• transformer lead protection

• high-voltage cable joints and terminations

2. thermal management

with a thermal conductivity of 0.2-0.3 w/m·k, these sleeves are employed in:

• heat shrink applications for pipe insulation

• thermal barriers in automotive exhaust systems

• protective covers for industrial heating elements

3. chemical processing

the <0.5% weight change when exposed to harsh chemicals enables use in:

• pump and valve stem protection in chemical plants

• laboratory equipment shielding

• pharmaceutical processing line components

4. medical devices

medical-grade silicone sleeves (usp class vi compliant) serve as:

• protective covers for surgical instruments

• insulation for electrosurgical tools

• gripping surfaces for prosthetics

5. aerospace and defense

meeting mil-dtl-25988 specifications, these sleeves are critical for:

• wire harness protection in aircraft (with -65°c to 200°c operational range)

• missile guidance system component insulation

• satellite wiring protection against atomic oxygen

maintenance and care guidelines

proper maintenance extends silicone rubber sleeve lifespan beyond the typical 5-10 year service life:

cleaning procedures

• mechanical cleaning: use lint-free cloths with isopropyl alcohol (ipa) for surface contaminants

• ultrasonic cleaning: effective for intricate designs at 40-60 khz with ph-neutral solutions

• steam cleaning: suitable for food-grade applications at <140°c steam temperature

storage conditions

• maintain storage temperature between 10-25°c (50-77°f)

• relative humidity should be <65% rh

• keep away from ozone-generating equipment (storage life reduces by 30% at >0.1 ppm ozone)

performance monitoring

• conduct annual dielectric tests (minimum 15 kv/mm maintained)

• measure hardness changes (alert if shore a variation exceeds ±5 points)

• inspect for compression set (replace if >25% after 22h at 175°c per astm d395)

replacement indicators

• visible cracks exceeding 0.5 mm depth

• permanent deformation >15% of original dimensions

• surface resistivity dropping below 1010 Ω/sq