What is a Hydraulic Union? Types, Standards and Choosing the Right

What is a Hydraulic Union? Types, Standards and Choosing the Right Fitting

What is a Hydraulic Union? Types, Standards and Choosing the Right Fitting

When it comes to pressure safety, sealing, and system efficiency in hydraulic systems, one of the first components that comes to mind is the hydraulic union. An incorrectly selected or inferior fitting; It can lead to oil leakage, pressure loss, equipment failure and serious occupational safety risks.

In this article, we discuss what a hydraulic union is, types of unions, international standards, and choosing the right union in technical details.

What is a Hydraulic Union?

Connecting equipment such as hydraulic fitting, hydraulic hose, pipe, valve, pump and cylinder; It is a fastener that provides a leak-proof connection under high pressure.

It usually takes on the following tasks:

Making fluid transmission safe

Providing pressure-resistant connection

Offering ease of maintenance and installation

Protecting the connection against vibration and shocks

Types of Hydraulic Fittings

Unions used in hydraulic systems are classified according to thread type, sealing method and usage area.

Hydraulic Unions by Thread Type

BSP (British Standard Pipe)

BSPP (straight thread)

BSPT (tapered thread)

Common in Europe and Turkey

NPT / NPTF

American standard

Tapered tooth structure

Sealing is provided through the thread

Metric Threaded Unions (DIN – ISO)

DIN 2353

ISO 8434

Ideal for industrial and heavy-duty applications

Unions by Sealing Type

O-ring fittings (ORFS – SAE J1453)

Fittings with conical surface (24°, 37° flare)

Metal-to-metal sealing fittings

In high-pressure and vibrating systems, hydraulic unions with O-rings are one of the most reliable solutions in terms of sealing.

Types of Hydraulic Fittings According to Structure

Straight fitting

Elbow gland (45° – 90°)

T fitting

Reduction union

Swivel fitting

Hydraulic Union Standards and Compressive Strength

Standard compliance is critical when selecting hydraulic fittings.

The most common standards are:

DIN 2353

ISO 8434

SAE J514 / J1453

EN 10226

Compressive strength of fittings;

Material (carbon steel, stainless steel)

Tooth form

Sealing type

Depends on manufacturing tolerances

A quality hydraulic union should be designed to withstand at least 4 times the maximum operating pressure of the system.

How to Choose the Right Hydraulic Union?

The following questions must be answered when choosing a hydraulic fitting:

How many bars is the working pressure?

What is fluid type? (Hydraulic oil, water-glycol, chemical, etc.)

What is the dental standard and size?

What are the vibration and temperature values?

Fixed or rotary union required?

Wrong fitting selection;

Hose burst

Oil leak

Pump and valve failures

Business shutdowns and cost increase

It can cause serious consequences such as.

Things to Consider in Hydraulic Union Installation

Teeth should never be cross-tightened

O-rings should be checked before installation

Proper tightening should be done with a torque wrench

Teflon or sealant should be preferred for non-standard uses

Conclusion: Hydraulic Union Small Part, Big Safety

Hydraulic unions, although small in size, are critical components for system safety. Fittings selected in the right standard, from the right material and in the right pressure class; It extends the lifespan of the hydraulic system and reduces operating costs.

If you are looking for hydraulic fittings, high pressure fittings or special size hydraulic fittings; You should definitely work with suppliers who can offer technical support and have quality certificates.

Hidroman Applications;

How are hydraulic fitting threads made? You can access the correct hydraulic equipment selection and programming methods by Hidroman engineers from the link below.

All hydraulic components required for your machine are offered to you from a single address. With 20 years of experience in hydraulic system engineering, strong collaborations with the world's distinguished brands and following new technologies in the sector, we offer you perfect and competitive solutions.

We produce special solutions for you.

Our Hydraulic System Engineers produce package solutions for you. Hydraulic Components such as Hydraulic Hose, Bent Pipe with Union, Connection Element, Pipe Clamps, Hydraulic Filters, Line Type Valves that your machine needs are determined on-site by our Engineers and all equipment suitable for your needs are listed after the necessary system calculations and offered to you as a package solution.

Our customers choose Hidroman companies due to the creativity and efficiency of our employees. We are committed to diversity, innovations, technology, and we invest in skills through training and development.

We understand you very well with our machine manufacturing experience dating back to 1950.

OUR BRANDS

We manufacture in many areas under the roof of Hidroman. We manage each product group and production groups separately to increase our service quality. For more information: www.hidroman.com.tr

As Seide Makina A.Ş., we establish Hydraulic Hose Production Lines with Fittings and Twisted Steel Drawn Pipe Production Lines with Fittings. For more information:

www.seidehydraulics.com

www.seidemachine.com

As Heben Makina, we produce mobile construction equipment with hydraulic systems.

As Hydraulic Market, we offer hydraulic equipment and services to our customers via the internet with our online sales platform in Türkiye. For more information: www.hidrolikmarket.com.tr

As Hydraulic Store, we offer hydraulic equipment and services to our customers via the internet with our online sales platform abroad.

As Pneumatic Market, we offer our customers pneumatic equipment and services over the internet with our online sales platform in Türkiye. For more information: www.pnomatikmarket.com

As Ata Hydraulic Cylinder, we manufacture hydraulic cylinders and perform hydraulic cylinder revisions.

As Hydraulic Service, we are not only there for you in case of Hydraulic System Failures and Sudden Stops, but also ensure that your hydraulic system machines operate with more efficiency with our predictive maintenance work. For more information: www.hidrolikservis.com.tr

Customer - Supplier - Employee Collaboration on Sustainability
Great marketing is a powerful tool for change. We work with the world's leading expert brands on social and environmental issues, creating work that addresses stereotypes, changes minds and encourages healthier and more sustainable consumer choices.

Our ethical standards
We aim to create a consistent culture across Hidroman companies and locations, helping our employees apply high standards and make the right decisions. Respect for human rights is a fundamental principle for Hidroman and we apply rigorous privacy and data security standards.

Hydraulic Engineering Solutions That Suit Your Needs
Meet Hydraulic Component Kits that suit your needs!

We work to speed up your manufacturing with Good Engineering solutions.

With our ready-made kits, we undertake your stock costs and assembly costs, so your valuable time is yours. We think and implement everything so that you can produce better machines.

Perfect Solutions with Our Transparent Approach
With our transparent manufacturing approach, we open the doors of every stage of our production to you. Don't waste your valuable time on hydraulic components, we work to offer you good engineering solutions. Let us do all your work on hydraulic components, focus on your work without wasting time on your machine's hydraulic system improvements.

Value Added Service
· Independent application consultancy and engineering

· Active support with the selection of suitable components considering technical and economic criteria

· Analysis and optimization of the current design and development of the new system

· On-site assembly training and hydraulic seminars

Fast Supply
Meet our flexible customer-oriented solution methods; we produce special solutions for you so that you do not have problems with supply.

Our Strengths - Your Advantages
· We make the necessary machinery and equipment investments on your behalf to increase your efficiency and performance.

· We produce extra values by reducing the total cost.

We open branches for you, at your location, specifically for you and only to serve you.

Hidroman Makes a Difference with Its Customer-Focused After-Sales Service Approach!

Hidroman, which has a 20-year history in the Hydraulic System sector, offers an after-sales service approach focused on increasing customer satisfaction with maintenance contracts that aim to reduce the operating costs of its customers and increase efficiency.

Hidroman, the innovative brand of the Hydraulic Equipment sector, continues to make a difference with its after-sales services positioned in accordance with the needs of its customers as well as the services it offers before and after sales. Hidroman, which aims to provide uninterrupted and safe services to its customers with its operations throughout Turkey and Europe, defines a perfect customer experience as product reliability and after-sales service reliability.

Hidroman, which has made being with its customers throughout the life of the product in order to create brand loyalty a part of its corporate culture, organizes the services it offers within the scope of After-Sales Services under four main headings as supervision and assembly, commissioning, maintenance-repair and original spare parts supply. Supervision service; It covers consultancy and training services on issues such as efficient hydraulic equipment selection, rules to be considered for correct product installation and connection of the pump with other installation equipment. After the installation of the device, the commissioning service is also carried out by Hidroman’s expert technical staff.

In hydraulic equipment technologies used in many different areas, malfunctions may occur over time due to operating conditions. During the 10-year life of a piece of equipment, the initial investment cost and repair expenses constitute 10-15% of its total cost, while the remaining expenses are due to energy consumption. Hidroman examines all processes from the selection of the hydraulic system to all the equipment on which the hydraulic system will operate, and offers “efficient system solutions that aim to minimize energy consumption”.

In addition, with preventive and protective maintenance agreements, it aims to reduce the risk of failure of the device, extend its life and ensure that the device operates with high efficiency and low energy consumption.

Thanks to the advantages offered by Hidroman with preventive and protective maintenance services, the budget allocated by its customers for maintenance pays for itself in a short time.

In businesses where uninterrupted service is important, Hidroman intervenes in malfunctions in a short time and minimizes damages caused by labor losses. Offering its customers a 10-year original spare part guarantee in the hydraulic systems it sells, Hidroman delivers tested original spare parts from stock in case of malfunction, shortens malfunction periods and eliminates disruptions that may occur during this period.

Hidroman After-Sales Services department stated that they offer annual maintenance services in accordance with the needs of the business. It states that their aim with maintenance services is to increase hydraulic system efficiency, ensure continuous operation of the hydraulic system and to detect, monitor and prevent possible malfunctions in operating equipment and devices by using technological measurement, control, analysis and monitoring devices.

We aim to standardize the service provided by our authorized services by inspecting them at certain intervals. In addition, we follow the calibration processes of our technical equipment in line with quality certificates. We attach importance to communication channels to be established in order to increase customer satisfaction both in sales and service. We are at the service of our customers 24/7 with our competent services that can answer the questions of our customers who buy our products by trusting our brand. In order to measure the customer satisfaction rate, we organize surveys for our customers at certain intervals through our call center. As a result of the feedback we receive, we take action quickly to meet the expectations of our customers. The nature of the products and services in the market is changing rapidly with the effect of the digital transformation we are experiencing due to technological developments. For this reason, we see the development in our products and services as a constantly living process and we continue our improvement and development works without stopping.

What is a Hydraulic Union? Types, Standards and Choosing the Right Fitting

What is a Hydraulic Union? Types, Standards and Choosing the Right Fitting

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