локтайт 577

Loctite 577

Applications:Pipe sealing; Thread sealing
Breakaway torque, Steel, M10:33.0 N·m (295.0 in./lb.)
Цвет: желтый
Тип отверждения: Анаэробное отверждение
Key characteristics:Chemical resistant; Fluorescent; General purpose; Immediate low pressure sealing; Strength: medium strength; Surface contamination-tolerant; Temperature: high temperature; Thixotropic
Рабочая температура: от -55,0 °C до 150,0 °C (от -65,0 °F до 300,0 °F)
Физическая форма: паста
Recommended for use with:Metal; Metal: passive metal; Thread type: tapered
Viscosity, 20 RPM:25000.0 mPa·s

Обзор

Loctite 577 is a medium-strength anaerobic thread sealant предназначенный для metal pipe threads and fittings. It cures in the absence of air between metal surfaces and forms a tough, chemical-resistant polymer that seals and locks the thread interface.

Once cured, Loctite 577:

  • Помогает предотвратить утечки жидкостей и газов по спирали нити

  • Противостоит ослаблению от vibration, thermal cycling and pressure pulsation

  • Защищает резьбу от corrosion and galling over time

It replaces PTFE tape and traditional “pipe dopes” in many applications, providing cleaner assembly and more repeatable sealing performance.

Why choose Loctite 577?

1) Medium strength – sealed yet serviceable
Loctite 577 provides strong sealing while remaining removable with normal tools for maintenance or rework. It secures fittings against vibration but still allows disassembly during planned shutdowns.

2) Suitable for tapered and straight metal threads
The product is formulated for металлические нити on pipework, manifolds, valve bodies and fittings – whether tapered pipe threads or straight threads designed to seal in the flank area.

3) Thixotropic, non-drip formula
Loctite 577 is тиксотропный: it flows under shear during assembly but stays in place on the threads at rest. That means no running on vertical joints and minimal migration into internal passages.

4) Clean alternative to tape and paste
Unlike PTFE tape, Loctite 577 does not shred, bunch up, or extrude into valves and filters. It stays in the threads where it belongs, cutting down on contamination and rework.

5) One-part, room-temperature cure
Поставляется в виде single-component product, there is no mixing or ratio control. Apply directly from the bottle, assemble, and let it cure at ambient temperature.

Типичные области применения

Loctite 577 is widely used for metal threaded pipe connections в:

  • Гидравлические и пневматические системы – manifolds, cylinders, valve blocks, actuators

  • Plant utilities – compressed air, water, inert gases and general service lines

  • Pumps and compressors – suction and discharge pipework, lubrication and cooling lines

  • Process and industrial equipment – filters, heat exchangers, dryers, skids and machinery

Loctite 577 is intended for только металлические резьбы и не рекомендуется использовать для резьбы пластиковых труб или для работы с чистым кислородом / сильными окислителями.

How to Use Loctite 577

Шаг 1 – Подготовка поверхности

  • Clean threads to remove loose dirt, rust, old tape or sealant.

  • Вытрите heavy oil, grease and cutting fluids.

  • A light oil film is often tolerated, but cleaner metal gives more consistent sealing and strength.

Шаг 2 - Нанесите герметик

  • Shake the bottle briefly.

  • Применить непрерывная бусина of Loctite 577 around the male threads, covering the area that will be engaged.

  • Avoid flooding the first thread to reduce the chance of excess product entering the system.

Шаг 3 - Сборка и ориентация

  • Assemble the joint and tighten to the specified torque or to the correct orientation (for elbows, tees, gauges).

  • The thixotropic consistency helps the product stay in the threads during assembly.

Шаг 4 - отверждение и испытание под давлением

  • Оставьте соединение до тех пор, пока оно не наберет прочность.

  • Follow recommended times before pressure testing or putting the system into full service (larger diameters and colder conditions may need longer).

Шаг 5 - Разборка

  • During maintenance, fittings sealed with Loctite 577 are generally Снимается с помощью обычных ручных инструментов.

  • If the joint has been in service for a long time or at elevated temperature, extra leverage may be required, but the cured product typically helps prevent severe thread seizure.

Безопасность и обращение

Typical safety aspects for anaerobic sealants like Loctite 577:

  • Может вызвать раздражение кожи и глаз при контакте

  • Repeated or prolonged contact can cause сенсибилизация кожи у некоторых людей

  • Пары или туман могут вызвать легкое раздражение дыхательных путей в плохо проветриваемых помещениях

  • Неотвержденный продукт может быть вредные для водной флоры и фауны при неконтролируемом выбросе

Передовая практика

  • Использование в хорошо проветриваемый область.

  • Избегайте контакта с кожей и глазами; носите защитные очки и подходящий защитные перчатки.

  • Тщательно мойте руки после работы и перед едой или питьем.

  • Do not pour uncured sealant into drains or natural waterways.

  • Хранить в оригинальной, плотно закрытой упаковке в прохладное, сухое место, Вдали от тепла и прямых солнечных лучей.

Всегда следите за последними Паспорт безопасности (SDS) for Loctite 577 in your region.

Часто задаваемые вопросы

Q1: What is Loctite 577 used for?
Loctite 577 is used to lock and seal metal pipe threads and fittings, preventing leaks of liquids and gases and resisting vibration in industrial and plant systems.

Q2: How is Loctite 577 different from PTFE tape?
PTFE tape can shred, bunch up or extrude into valves and filters, and its performance depends heavily on installer technique. Loctite 577 cures into a solid polymer seal inside the threads, giving more consistent sealing and reducing the risk of stray tape fragments.

Q3: Is Loctite 577 removable?
Yes. Loctite 577 is a средней прочности sealant. Fittings can normally be disassembled using standard hand tools, making it suitable for systems that will be serviced in the future.

Q4: Can I use Loctite 577 on stainless steel and brass fittings?
Yes. Loctite 577 is suitable for steel, stainless steel, brass and many other metals commonly used in pipework and fittings. Always confirm compatibility for special alloys.

Q5: Is Loctite 577 suitable for plastic pipes or plastic fittings?
No. Anaerobic products like Loctite 577 are formulated for металлические нити and can cause stress cracking in some plastics. Use a sealant designed specifically for plastic piping when needed.

Q6: Can Loctite 577 handle high pressure?
When properly cured on correctly machined metal threads, Loctite 577 is designed for уплотнение высокого давления in many fluid and gas systems. Always validate performance in your own application and follow the pressure limits published in the Technical Data Sheet.

Q7: Do I still need thread tape if I use Loctite 577?
No. Loctite 577 is intended to replace PTFE tape or pipe dope in most metal-threaded joints. Using tape and sealant together is usually unnecessary and can interfere with correct sealing.

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