How to choose the appropriate hydraulic speed and suitable joint

Choosing the appropriate hydraulic speed and joint requires comprehensive consideration of application scenarios, performance requirements, and operational convenience. The following are the specific steps and key points:

1、 Clarify application scenarios and core requirements

Media Type

Hydraulic oil/lubricating oil: It is necessary to choose materials that are resistant to oil and corrosion (such as steel, stainless steel, brass).

Water/gas: Plastic or lightweight alloy joints can be used, but the pressure resistance level needs to be confirmed.

Chemical liquids: Special materials such as polytetrafluoroethylene (PTFE) lining, Hastelloy, etc. should be selected based on the characteristics of the medium.

Work pressure and temperature

Pressure range: Select the rated pressure of the joint based on the high pressure of the system (such as 10MPa, 35MPa, 60MPa, etc.), with a safety margin of 20% -30%.

Temperature range: High temperature environments (such as exceeding 120 ℃) require the use of high-temperature resistant (based on actual reports) sealing materials (such as fluororubber), while low-temperature environments (such as below -40 ℃) should avoid material embrittlement.

frequency of use

Frequent insertion and removal: Choose self-locking or sleeve type connectors to reduce the risk of wear and leakage.

Long term fixation: Threaded locking or welded joints can be used to improve stability.

2、 Matching of key performance parameters

Type of connector

Straight through type: suitable for straight pipelines with low flow resistance.

90 °/45 ° elbows: used for pipeline layouts with limited space.

Three way/multi way: scenarios that require diversion or merging.

Suitable speed for disconnection: equipment that requires frequent disassembly and assembly (such as hydraulic tools, test benches).

sealing form

O-ring seal: The structure is simple and the cost is low, but the sealing ring needs to be replaced regularly.

Flat seal: resistant to high pressure, suitable for high vibration environments.

Spherical seal: automatic centering, good anti eccentricity ability, suitable for precision and appropriate connection.

Material Selection

Carbon steel: cost-effective, suitable for general hydraulic systems.

Stainless steel: corrosion-resistant (based on actual reports), suitable for food, medicine, or marine environments.

Brass/Aluminum Alloy: Lightweight, suitable for low-pressure gas or water systems.

Plastic (such as POM, PA): resistant to chemical corrosion, but has lower pressure and temperature resistance.

3、 Convenience of operation and maintenance

insertion and extraction force

Choose a connector with moderate operating force to avoid damage or leakage caused by difficulty in plugging and unplugging.

A joint with a power assisted handle or lever can reduce the difficulty of operation.

Anti misoperation design

Key systems should use connectors with locating pins or irregular interfaces to prevent equipment damage caused by misconnection.

Visual identification

The joints of different pressure levels or media can be distinguished by color or labels for easy maintenance and management.

maintenance cost

Prioritize selecting joints with replaceable sealing rings and modular design to reduce long-term usage costs.

4、 Enron and Certification Standards

Certification requirements

Confirm that the connector complies with reputable standards (such as ISO 7241, DIN 24340) or industry standards (such as CE, ATEX explosion-proof (based on actual reports) certification).

The food and pharmaceutical industries require FDA or NSF certification.

Anran Design

High voltage connectors should be equipped with anti drop devices (such as safety locks and spring buckles).

Explosive environments require the use of anti-static (based on actual reports) materials or grounding designs.

5、 Summary of Selection Steps

List the requirements: medium, pressure, temperature, frequency, and spatial layout.

Filter connector types: match straight through, elbow, suitable speed for disconnection, etc. according to requirements.

Verify performance parameters: pressure/temperature tolerance, sealing form, material compatibility.

Evaluate operational convenience: insertion and removal force, anti misoperation, maintenance cost.

Confirm Enron certification: meets industry or regional standards.

Trial installation and testing: Verify performance in small-scale applications before large-scale adoption.