Hydraulic Banjo Fittings​

Structure principle and core advantages of hydraulic banjo fittings

1. Basic structure composition
Hollow bolt: center through-hole design (hole diameter 325mm)
Ring joint body: the outer diameter is usually 1.82.5 times of the bolt diameter.
Double-layer sealing gasket: annealed copper or special composite material.

2. Five technical advantages
1. 360°swivel connection: allows the pipeline to be positioned at any angle
2. Ultra-thin design: total thickness of only 1540mm (1/3 of conventional fittings)
3. Dual-channel flow: center hole + annular cavity double circulation
4. Pulse resistance: passed ISO 6803 standard 2 million times pulse test
5. No welding: bolt mechanical connection to avoid thermal deformation.

Common types of hydraulic banjo fittings

1. categorized by pressure level

2. Classified according to the form of interface
Straight: Standard ISO thread (M12 x 1.5 to M30 x 2)
Right angle type: 90° turn to save space
Tee type: T-shape manifold design (adjustable flow distribution ratio)

3. Special Function Models
Self-locking type: Built-in spring locking device (special for vibration environment)
Quick release type: with safety locking pin design (easy maintenance)
Temperature measurement: Integrated PT100 temperature sensor interface.

Price list of hydraulic banjo fittings in different sizes

hydraulic banjo fittings identification guide

1. Key identifying features
Material identification: laser engraved material code on the fitting body (e.g. “CuZn39Pb3” for leaded brass)
Flow marking: Arrow in the ring area to indicate flow direction
Stamp of approval: DIN/ISO standard number + pressure level (e.g. “DIN235363MPa”).

2. Performance verification methods
Seal test:
Pressurize to 1.5 times the working pressure
Leakage <0.1ml/min for 3 minutes at holding pressure

3. Dimensional test:
Verify the accuracy of bolt center hole by using through stop gauge
Tolerance of ring groove width ±0.05mm

hydraulic banjo fittings professional installation

1. Standard installation process

Clean the pipe connections (NAS 1638 Class 8).
② Sequential assembly: bolt → lower gasket → fitting body → upper gasket
③ Tighten crosswise in stages:
Step 1: 30% rated torque (e.g. 20N-m)
Step 2: 70% rated torque (e.g. 47N-m)
Step 3: 100% rated torque (67N-m±5%)

2. Critical Considerations
Torque control: over-torquing can cause plastic deformation of copper shims.
Gasket Replacement: Gaskets must be replaced with new ones for each disassembly.
Flow direction confirmation: Ensure that the arrow in the annular chamber is in the same direction as the flow direction.

Troubleshooting common problems with hydraulic banjo fittings

Leaking ports, what can be done?
Gasket not replaced/insufficient torque
Re-fit to standard torque

Insufficient flow, what can be done?
Ring chamber clogged with contaminants
Ultrasonic cleaning of joint body

Broken bolt, how to solve?
Fatigue damage/material defect
Change to alloy steel bolts

In space-constrained braking systems or servo-hydraulic installations, banjo fittings can save more than 40% of installation space compared to conventional fittings. It is recommended to check the sealing condition of the gasket every 2,000 operating hours, and special alloy gaskets are required for high temperature conditions (>120°C).

2025 Hydraulic Banjo Fittings​ Product Showcase, Prices as low as $0.15

(Special customization available, free samples)