EO-2 Functional Nut

The XYOON EO-2 function nut has passed ISO 9001:2015 and CE safety certifications. It is a sealing-type fastening component specifically designed for the EO-2 hydraulic connector system. It integrates precise threads, built-in elastic sealing rings, and anti-over-tightening positioning rings. It can withstand a maximum pressure of 40 MPa and fully complies with ISO 8434-1 and DIN 2353 standards. It provides reliable and leak-free connections in fields such as construction machinery, ships, and petrochemicals. The sealing ring can be replaced on-site, eliminating the need to discard the entire nut during maintenance.

Product Advantages

XYOON EO-2 Functional Nut is a core matching fastener specially designed for EO‑2 hydraulic pipe joint systems, which is widely used in medium‑pressure and high‑pressure hydraulic pipeline projects of construction machinery, ships, petrochemical and machine tools. It adopts an integrated structure of precision thread and elastic sealing, with a positioning ring design to ensure accurate assembly without over‑tightening, and can form a stable and reliable sealing connection with EO‑2 pipe joints and card sleeves. The installation of XYOON EO‑2 functional nut only needs two wrenches, no welding and no complicated tools, which greatly improves the assembly efficiency of the pipeline system. At the same time, its built‑in sealing ring can be replaced quickly, which reduces the later maintenance cost and ensures the long‑term stable operation of the hydraulic system.

It fully complies with ISO 8434-1 and DIN2353 standards, features high pressure resistance up to 40MPa, strong vibration resistance and easy installation without welding. It effectively eliminates hydraulic pipeline leakage, widely applied in construction machinery, shipbuilding and petrochemical fields, and supports non-standard customization to fit diverse industrial pipeline connection and assembly demands.

Technical Specifications

Certification And Quality Assurance

All EO‑2 functional nuts have passed ISO9001 quality management system certification, EU CE safety certification and SGS material testing certification, which meet international standards. The quality control runs through the whole production process: raw material incoming inspection → precision forming → heat treatment → thread finishing → surface treatment → 100% pressure and air tightness testing → finished product packaging. Each batch of products has a complete quality inspection report, and the factory pass rate is stable above 99.8%. We have a professional quality inspection team and precision testing equipment to ensure that each product meets the design and use requirements.

Why Choose EO-2 Functional Nut

Unlike standard hydraulic nuts that require sealant or torque guesswork, the EO2 Functional Nut integrates sealing and locking into one precision component. The built-in positioning ring ensures you achieve correct compression every time – no over-tightening, no under-tightening, no sealant mess. When maintenance is needed, simply replace the sealing ring rather than the entire nut, cutting downtime and spare parts costs. It's the smarter choice for hydraulic systems that demand both reliability and serviceability.

Global Market Presence

XYOON EO-2 Functional Nuts serve hydraulic system manufacturers, machinery builders, and pipeline assembly workshops across major industrial regions:

Europe: Germany, Italy, UK, France – machine tool hydraulics, heavy equipment

Southeast Asia: Malaysia, Thailand, Vietnam, Singapore – construction machinery, OEM assembly

Middle East: UAE, Saudi Arabia, Turkey – petrochemical pipelines, oilfield equipment

Domestic China: Nationwide – hydraulic system integrators, engineering machinery plants

We supply both standard and non-standard EO-2 nuts to meet diverse pipeline connection and assembly requirements.

Maintenance & Usage Recommendations

To ensure optimal performance and maximum service life of your XYOON EO-2 Functional Nuts, please follow these guidelines:

Installation

Use two wrenches – one to hold the joint body, one to tighten the nut. No special tools required.

Tighten until the positioning ring makes firm contact – this indicates correct compression has been achieved. Do not overtighten beyond this point.

No liquid sealant or thread tape is needed – the built-in sealing ring provides all necessary sealing.

Sealing Ring Replacement

The sealing ring is a field-replaceable consumable. Replace when signs of hardening, cracking, or leakage appear.

Replacement procedure: Remove nut → extract old sealing ring → insert new ring (NBR for general oil, FKM for high-temperature/chemical service) → reinstall nut.

Always keep spare sealing rings in stock for quick maintenance turnaround.

Routine Inspection

Visually inspect sealing rings during regular hydraulic system maintenance checks.

Check for any signs of thread damage or galling – replace nut if threads are compromised.

Verify that the positioning ring is intact – deformation indicates over-tightening in previous installation.

Storage

Store spare nuts and sealing rings in a cool, dry environment away from direct sunlight and ozone sources.

Keep sealing rings in sealed bags to prevent contamination and premature aging.

Service Life

Under normal operating conditions, each EO2 Functional Nut can be reused through multiple sealing ring replacement cycles.

The nut body itself is designed for long-term service – only the sealing ring requires periodic replacement.

For technical assistance or to order spare sealing rings, contact our support team.

FAQ

Q1: What makes EO-2 Functional Nut different from a standard hydraulic nut?

A: A standard nut provides only clamping force. The EO2 Functional Nut combines clamping with integrated sealing (built-in sealing ring) and positioning (anti-over-tightening ring) in one component. This eliminates the need for liquid sealant and prevents both under-tightening and over-tightening errors.

Q2: Can I replace the sealing ring myself?

A: Yes. The sealing ring is a field-replaceable consumable. Simply remove the nut, replace the old ring with a new one, and reinstall. No special tools required – each nut can be serviced multiple times over its lifespan.

Q3: What sealing ring materials are available?

A: Standard sealing rings are NBR (nitrile) for general hydraulic oil applications. FKM (Viton) is available for high-temperature or chemical-resistant requirements. Please specify your fluid type and temperature range when ordering.

Q4: Is this nut compatible with EO-2 joints from other brands?

A: Yes. Manufactured to ISO 8434-1 and DIN 2353, our EO-2 Functional Nuts are dimensionally interchangeable with standard EO-2 joint systems from other manufacturers worldwide.