RY8001 Concealed Hydraulic Hinge: Hidden, Self-Closing and Adjustable

Updated 2026-11-09 · RAYEN 雷茵

What does it do that other hinges do not?

Three jobs in one part. It is invisible with the door closed, like any concealed hinge. It closes the door by itself, with a hydraulic buffer. And it adjusts in three directions after hanging. Its listed features also include closing speed adjustable fast or slow with no tool needed, and shallow routing with no hydraulic tail rod.

The body is zinc alloy with aviation aluminium. The photos show six finishes: Brushed Gunmetal, Matt Black, True Gold, Brushed Brass, Polished Chrome and Matt White.

What does the door need?

• Thickness 40–60mm.
• A pocket on the door edge and the frame, with a routing section of 36.2 × 12.2mm.
• A routing edge distance of 5mm on the door leaf and 5mm on the frame. Check on the drawing which face it is taken from before you set the jig.
• A frame deep enough to take the frame half of the hinge.

How many does a door need?

The load depends on the set, so name it on the order.

• Two hydraulic hinges: up to 60kg.
• Two hydraulic hinges and one plain leaf: up to 80kg.
• Three hydraulic hinges: up to 90kg.

No door height is listed for these sets. For a tall door, send us the size and we confirm the set and the positions.

How does it compare with the rest of the series?

• RY8002: 175mm long, same loads, 180°, with a routing edge distance of 4–13mm on door and frame. Use it when the hinge must sit further from the face.
• RY8003: 175mm long, 28mm leaf, doors 35–60mm, 110°, 70kg on two hinges, the same either way up, left or right. Its features list rebated, aluminium-framed and wooden doors.
• RY8004: 175mm long, 28mm leaf, doors 35–60mm, 110°, holds open from 90° to 110°, with the same three loads as RY8001.

So RY8001 and RY8002 are the ones that open to 180°. RY8003 and RY8004 suit thinner doors, from 35mm, but stop at 110°.

A worked example

A hotel suite door is 50mm timber at 75kg, and the design wants it to stay open against the wall at about 150° during cleaning, with no hinge in view.

• RY8001 with two hydraulic and one plain leaf carries 80kg, takes a 50mm door, and holds open anywhere from 90° to 180°. It fits.
• Two hydraulic only stops at 60kg, which is too light.
• RY8003 and RY8004 stop at 110°, so they cannot reach the wall.

Order three hinges per door, two hydraulic and one plain, and give the finish once for all of them.

What should you check before fitting?

• That every hinge on the door is the same model and finish.
• The pocket depth in the frame, especially on aluminium or thin metal frames.
• Hinge positions on the door. They are not printed, so ask for them with the drawing.
• Closing speed. It adjusts without a tool, so set it after hanging, then fine-tune the three-way adjustment. The 3D adjustable hinge guide explains each direction.

Is it handed?

The RY8001 listing does not say. RY8003 is listed as fitting either way up, left or right, but that line is not on RY8001. So write the door hand on the order, and we confirm it against the drawing.

What is the next step?

Send the door drawing, thickness, weight and frame section to [email protected]. We return the RY8001 drawing and the hinge positions for your door. For a quick check on one door, WhatsApp the factory owner. The number is on the contact page.

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