This information is for guidance only and is not intended to form the basis for contract. All dimensions in mm. Gatelocks Types VL10, VL11, VL20, VL21, VL30, VL31, VL60, VL61 Publication Number GL011/1211 Application For use on lift landings, Dewhurst gatelocks are robustly designed dual-contact locks, with pre-locking features. The VL10/11/20 and VL21 are use with collapsible gates or sliding doors; the VL30/31 with single swing doors and the VL60/61 with double swing doors. The gatelocks are used in conjunction with a suitable retiring ramp (such as the Dewhurst Type FR21) and are adaptable for either right-hand or left-hand operation. Note: VL11, VL21 and VL61 Operation is in accordance with BS5655:Part1:1986 except for clause 7.7.3.1.1 and Appendix F1. For use as like-for-like replacement only, in accordance with BS5655:Parts 11 & 12:Clause 2.2. Operation As the door(s) close(s) the beak enters the lock, engaging with an insulated cam carrying a self-aligning contact that completes a circuit when the beak reaches a closed position. This circuit is in series with the retiring ramp and a call for the lift immediately causes the ramp to withdraw, allowing the lever to fall forward so that the locking plate engages, locking the beak(s) in position. This action also makes a second circuit which is the actual control-circuit interlock of the lift controller. Type Approval This new development of the VL10/20/30 locks is clearly identifiable by the moulded transparent polycarbonate covers and the transparent contact carrier. These are design improvements to the range implemented by Dewhurst plc to meet the B.S. Requirement that the lock contacts should be visible for insurance inspection purposes. The VL10/20/30 locks now comply with the type-examination requirements of EN81:Part1:1988, Appendix F.1. Landing Door Locking Devices. Metal covers are still available to order for the VL10/20/30 locks but locks with this option do not comply with BSEN81-1:1998 Construction The lock is housed in a substantial, die-cast frame, enclosed at front and back by two captive screws. The VL10/20/30/60 and 61Gatelocks beak and carriers are aluminium bronze castings, the VL11/21 and 31 Gatelocks beak and carriers are brass castings. The beak is chamfered for easy entry into the lock. Contacts Contacts are self-aligning with self-cleaning action and have a positive knock-off feature. Rating - VL10/20/60 locks 2A @ 240V a.c., 0.7 power factor 1A @ 240V d.c., inductive load with a time constant of 100ms Weights VL10 Gatelock = 2.36kg VL30 Gatelock = 2.4kg VL11 Gatelock = 1.6kg VL31 Gatelock = 1.6kg VL20 Gatelock = 2.45kg VL60 Gatelock = 10kg VL21 Gatelock = 1.6kg VL61 Gatelock = 6.4kg f you require further information on our gatelocks please ask for the following publication numbers: VL10 Gatelock - II063 VL30 Gatelock - II062 VL11 Gatelock - II051 VL31 Gatelock - II029 VL20 Gatelock - II054 VL60 Gatelock - II014 VL21 Gatelock - II030 VL61 Gatelock - II052 Dewhurst UK Manufacturing Ltd - Unit 9, Hampton Business Park - Feltham - TW13 6DB - UK Tel: +44 (0)20 8744 8200 - Fax: +44 (0)20 8744 8299 - Email: [email protected] - www.dewhurst.co.uk This information is for guidance only and does not form the basis for contract - Dimensions in mm