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About OPK Fitting

OPK FITTING Hydraulic Equipment Factory is China Hydraulic Hose Suppliers and Hydraulic Hose Fittings Manufacturers. We are a professional domestic factory with extensive experience in the production of hydraulic pipes and fittings. Our managing scope relates to various fields such as hydraulic systems etc.; Including all kinds of materials with different pressure levels, flexible hydraulic hoses with various size criteria, hose fitting, adaptor, etc. They have been respectively applied in the hydraulic and fluid conveyance systems of industries, such as machinery, metallurgy petroleum, construction, ships, space-flight, agriculture, pharmaceutical, food, and so forth.
We provide ODM/OEM customization services for a wide range of high-pressure hydraulic fittings and hydraulic oil pipe fittings.
Over 10 years of experience.
A team of skilled design professionals and talent.
Excellent product quality and thoughtful customer service.

Our 10 years of customisation experience has created the OPK Fitting brand value.

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News

  • JIC Hydraulic Fittings: Sizes, Threads, vs NPT/ORFS, Selection and Installation
    Industry News 2026-09-03

    여러분의 손은 이미 그 차이를 알고 있습니다. JIC 수형 피팅은 JIC 암형 스위블과 금속 간 37° 플레어가 있는 시트에 부드럽게 나사산이 끼워져 있습니다. 동일한 수컷을 NPT 포트에 연결하면 나사산이 묶이거나 누출되거나 손상됩니다. 이 짧은 테스트는 JIC 유압 피팅이 인기 있고 오해받는 이유를 포착합니다. JIC는 공동 산업 협의회(Joint Industry Council)를 의미하며 형상은 SAE J514에 정의되어 있습니다. 평행 UNF 나사산과 37° 플레어 밀봉 표면. 유압 호스를 주문하거나 조립할 때 나...

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  • Hydraulic Fitting Threads: Identification Guide for NPT, JIC, ORFS, BSP, and Metric
    Industry News 2026-08-26

    새로 배달된 호스 조립품이 펌프 포트에 3번 회전한 후 결합된다고 가정해 보십시오. 조금 더 힘을 가하면 연결이 제대로 보이지만 시스템이 작동 압력에 도달하자마자 누출이 발생합니다. 현장 서비스에서 일치하지 않는 유압 피팅 스레드는 결함이 있는 호스보다 훨씬 더 자주 누출, 포트 벗겨짐 및 생산 시간 손실을 유발합니다. 스레드 계열과 이를 식별하는 방법을 이해하면 이러한 문제가 시작되기 전에 대부분의 문제를 해결할 수 있습니다. 유압 피팅 스레드가 중요한 이유 유압 피팅의 나사산은 부품을 함께 고...

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  • How to Identify Hydraulic Fittings: Thread Types, Standards & Sizing Guide
    Industry News 2026-08-20

    A hydraulic hose bursts on an excavator arm at mid-morning. The spare fitting in the toolbox looks exactly like the damaged one, but it will not thread on. Identifying hydraulic fittings correctly is what separates a 20-minute repair from a half-day hunt for the right adapter. Most hydra...

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Hydraulic Hose

1、What Is a Hydraulic Hose and Why Is It Important?

A hydraulic hose is a flexible tube designed to transport hydraulic fluid under high pressure within machinery and equipment. It plays a critical role in industries such as construction, agriculture, mining, and manufacturing. Hydraulic systems often operate at pressures ranging from 1,000 to over 5,000 PSI , making hose reliability essential for safety and performance.

These hoses are typically constructed with multiple layers, including an inner tube, reinforcement layers, and an outer protective cover. This design ensures durability, flexibility, and resistance to harsh environmental conditions.

2、What Are the Main Types of Hydraulic Hoses?

（1）Classification by Reinforcement

  • Wire Braided Hoses – Suitable for medium pressure applications
  • Spiral Wire Hoses – Designed for high-pressure systems above 4,000 PSI
  • Textile Reinforced Hoses – Lightweight and flexible

（2）Classification by Application

  • Industrial Hydraulic Hoses
  • Automotive Hydraulic Hoses
  • High-Temperature or Chemical-Resistant Hoses

Choosing the correct type ensures efficiency, safety, and longer service life in demanding environments.

3、How to Choose the Right Hydraulic Hose?

（1）Key Selection Criteria

  • Working Pressure – Should exceed system pressure by at least 25%
  • Temperature Range – Typically -40°C to 120°C
  • Fluid Compatibility – Prevents internal degradation
  • Flexibility and Bend Radius

（2）Comparison Table

Hydraulic Hose Types and Performance Comparison
Hose Type Pressure Range Application
Wire Braided 1,000–3,000 PSI General machinery
Spiral Wire 3,000–6,000 PSI Heavy equipment

4、How to Maintain Hydraulic Hoses for Long-Term Performance?

（1）Regular Inspection

Check for cracks, leaks, or bulging. Research indicates that over 60% of hose failures are due to external damage or improper maintenance.

（2）Correct Installation

Avoid twisting or exceeding the minimum bend radius, as this can reduce hose life by up to 50% .

（3）Company Introduction

Ningbo Force Auto Parts Co., Ltd. specializes in manufacturing high-quality hydraulic hoses, lifting slings, and industrial accessories. With advanced production technology and strict quality control, the company provides durable and reliable solutions to global customers, ensuring safety and efficiency in hydraulic systems.

5、Frequently Asked Questions (FAQs)

Q1: How long does a hydraulic hose typically last?

Most hydraulic hoses last between 3 to 5 years , depending on operating conditions and maintenance.

Q2: How do I know if a hydraulic hose is failing?

Signs include visible cracks, fluid leaks, reduced system pressure, and unusual bulging.

Q3: How can I improve hydraulic hose lifespan?

Follow proper installation guidelines, perform regular inspections, and use hoses rated for your system’s pressure and temperature.