Hydraulic door closer JNF ML.21.770 · EN 3–6

The Hydraulic door closer JNF ML.21.770 is a high-quality surface-mounted overhead closer from the Portuguese manufacturer JNF, designed for precise and quiet closing of doors in commercial and residential buildings.

The body is made of aluminium with a silver coated finish of matt appearance. The robust construction and the precise rack-and-pinion mechanism give a long and safe service life.

The closing force is adjustable from EN 3 to EN 6, so the closer covers doors up to 130 kg and up to 1250 mm wide, with an opening angle of up to 180°. Closing speed and latching action are set with valves, the force with the spring. The integrated back-check damps opening that is too fast and protects the door and the wall. The door closes quietly and under control, slamming is prevented and heat loss is reduced.

It is surface-mounted on left- or right-hand doors (DIN left and DIN right) with the screws supplied. Note: the closer is delivered without the arm – the arm has to be bought separately, depending on the desired opening and mounting method. The closer takes all JNF arms: the standard arm 21.105.AN, the slide arm 21.101.AN (anti-vandal) (closing force EN 2–4 with it) and the arm with hold-open 21.110.AN.

Product description

• Material: aluminium
• Colour: silver
• Finish: matt
• Type: surface-mounted hydraulic overhead door closer
• Mechanism: rack and pinion
• Brand: JNF

Technical specifications

• Closing force: EN 3–6 (adjustable via the spring)
• Max. door weight: 130 kg
• Max. door width: 1250 mm
• Opening angle: up to 180°
• Closing speed: adjustable via valve
• Latching action: adjustable via valve
• Back-check: integrated opening damping
• Door handing: suitable for DIN left and DIN right
• Mounting: surface-mounted, with screws (included)
• Certification: CE marking, EN 1154 (class 4 8 6/3 1 1 3), manufacturer's fire certificate
• Manufacturer's warranty: 10 years
• Dimensions: 275 × 62 × 45 mm

Application and use

• For homes, offices, public buildings and sanitary areas
• For fire doors – with the manufacturer's fire certificate
• For left- and right-hand doors, without changing any parts
• Back-check protects the door and the wall against opening too fast
• Quiet, controlled automatic closing without slamming

Package contents

• 1 hydraulic overhead door closer
• Mounting screws
• Mounting instructions
• The closer arm is not included – bought separately

Documentation

• JNF ML.21.770 mounting instructions (PDF)
• JNF ML.21.770 catalogue (PDF)
• JNF ML.21.770 technical data sheet (PDF)

Dimensions (in mm):

length 275 · height 62 · depth 45

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