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9957EO.1220.US28 Three Point Locking Device

9957EO.1220.US28 Three Point Locking Device | Image 1
MPN: 9957EO.1220.US28
Finishes: US28 Anodized Aluminium
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9957EO.1220.US28 Three Point Locking Device | Image 2
9957EO.1220.US28 Three Point Locking Device | Image 3
9957EO.1220.US28 Three Point Locking Device

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  • Product Description
  • Installation and Technical Information


Heavy Duty Three Point Locking Device - (suits doors <1220mm x <2134mm) Anodized Aluminium

The Quiet One®

A fluid dampener decelerates the touch bar on its return stroke and eliminates most noise associated with exit device operations. Furnished on all 99 Series Exit Devices

In accordance with BS EN 1125: 2008 Annexe A (informative) the device should be installed with the touch bar normally at a height between 900mm and 1100mm from the finished floor level when the door is in the secure position. Where it is known that the majority of the occupants of the premises will be young children, it is acceptable to reduce the fixing height accordingly.

Trade Customers - Ask us about trade terms/prices

  • Device Functions - Ships ready for functions; EO, DT & NL - for TP, K & L remove the NL drive screw from the reverse of the device
  • Device Lengths - This device suits doors to 1220mm, optional device suits doors to 915mm
  • Finishes - US28 (628) Anodized Aluminium. Alternative plated finishes are available to special order (consult Relcross for details)
  • Strikes - Ships with standard 299 roller strike, bottom strikes 248L-4 and 304L. Optional strikes are available to suit alternative frame details (consult the Relcross for details). 299 top roller strike with 21mm projection, used with conventional frames where a reveal >32mm exists. 248L-4 Bottom Strike for use with flat top thresholds. Since the strike projects by 10mm care should be taken to ensure installation does not pose a trip hazard. 304L Optional Bottom Strike for use where a mortice installation is desired. Please note - Both the 248L-4 & 304L Bottom Strikes are supplied as standard with all surface mounted vertical rod devices.
  • Dogging Feature - Hex Key Dogging keeps the latch bolt held back for free swinging operation. Options available to special order - CD Cylinder Dogging & LD Less Dogging
  • Fasteners - Includes fixings for both metal and timber doors 19mm 425 for bolt through fixings
  • Latch Bolt - Easy action friction free deadlocking latches cannot be depressed from the outside - with 19mm throw
  • PAS 1188-1:2009. Flood Protection Products. Specification. Part 1: Building Aperture Products
    Effective July 2014 and in association with our colleagues at Loddon Door Services Ltd, Relcross is pleased to announce that this product is certified for use on outward opening flood defence doors: Certificate: PAS 1188-1:2009. Flood protection products. Specification. Part 1: Building Aperture Products

    PAS 1188-1 applies to flood protection products used in the temporary sealing of building apertures and entrances to properties, in the event of static flood water rising up to a level between 600 mm and 900 mm above ground level.

Electric Options -

Optional Trim (for Outside Access)

add suffix -

DT - Dummy Trim
EO - Exit Only
K - Knob 
L - Lever
L-BE - Lever (Blank Escutcheon)
NL - Night Latch
NL-OP - Rim Cylinder (Optional Pull Required)
TP - Thumbpiece

Von Duprin | 99 Series Standard Trim | relcross door controls®  

UK Fire Certification in accordance with EN 1634-1:2000 (timber)
WFRC No. C132276 120mins, BS EN 1125: 2008


Important note - the addition of outside access devices restricts the fire certification to 60 minutes.

Von Duprin 98/99 Series Exit Hardware

98/99 Data Sheet

Best suited to heavy duty situations on perimeter and internal doors where architectural grade safe egress in panic emergency situations is a requirement.

This range of architectural grade escape devices includes the 98 Series with its smooth mechanism case and the established 99 Series with its familiar grooved design. The two styles are mechanically and dimensionally identical and provide a solution specifically for standard stile applications down to 89mm.

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Relcross Ltd (Relcross Door Controls)
Hambleton Avenue
SN10 2RT

t: 01380 729 600