Dorma C540 Privacy, Bedroom or Bath Keyless Lever Lockset

Yes, and it adjusts down for thinner leaves. The C540 cylindrical lockset covers doors 1-3/8 to 1-3/4 inches thick, so it handles both the 1-3/4 inch commercial standard and the 1-3/8 inch interior doors you still find in older apartment and hotel stock. Past 1-3/4 inches you are out of range. If some leaves in the same building run thicker, the Cal-Royal CAL20 privacy lock is rated 1-3/8 to 2 inches.

It works out of a 2-3/4 inch backset. The C540 is supplied with the 15230 latch, 2-3/4 inch backset with a 1 inch square corner faceplate, and the 5001 strike, ANSI 1-1/4 by 4-7/8 inches, square corners. A frame already cut for a 4-7/8 inch ANSI strike takes it with no new mortise. Where it will not work is a door bored on the 2-3/8 inch backset, the other common bore location: the crossbore sits an inch closer to the edge and the latch will not reach.

No. The C540 is the non-keyed function in the C500 line, ANSI/BHMA F76A, bed and bath privacy. There is no cylinder in it and no keyway to pin, so it is the wrong choice for any opening you need to secure or control access through. For keyed openings on the same job, the Orca Hardware OCL250 is a Grade 2 keyed entrance cylindrical lockset and the Marks USA 195RAB is a Grade 1 entry clutched lever supplied less core.

The Cal-Royal CAL20 is the Grade 1 counterpart to the Dorma C540. Both are privacy/bed/bath locksets, but the C540 is certified ANSI/BHMA Grade 2 while the CAL20 is a Grade 1 extra heavy duty privacy lock in the Calypso series. If the specification on the job calls for Grade 1 on restroom doors, the CAL20 meets that line item with the same privacy function the C540 provides.

The Dorma C540 chassis adjusts for doors 1-3/8 inch to 1-3/4 inch thick, so a 2 inch door is outside its range. The Cal-Royal CAL20, a Grade 1 privacy/bed/bath lock, is rated for doors 1-3/8 inch to 2 inch. If the opening also allows a knob rather than a lever, the Lockey 1600 heavy duty mechanical keyless knob lock covers 1-1/8 inch to 2 inch doors and has an adjustable backset. Measure the door leaf before ordering, because the thickness range is the first thing that rules a cylindrical chassis in or out.

No. They share the ANSI grade but not the function. The Dorma C540 is a Grade 2 privacy/bed/bath lockset, which means the lever locks the door for a bedroom or bathroom. The Orca Hardware OCL210 is a Grade 2 medium duty passage lockset, which latches the door but never locks it. Ordering the OCL210 for a restroom leaves the door with no privacy at all, and the two look nearly identical once installed, so confirm the function code before the order goes out.

The Dorma C540 is non-keyed, so an entry door needs a keyed chassis instead. The Orca Hardware OCL250 is a Grade 2 medium duty entrance cylindrical lockset, and the Stanley Security QCL150 is a Grade 2 entrance lever supplied less cylinder with a square 2-3/4 inch backset latch and a 4-7/8 inch by 1-1/4 inch ASA strike, which is the same backset and the same ANSI strike size the C540 uses. Ordering the QCL150 keeps the door and frame prep identical while adding the cylinder.

Hand follows the lever on the C540. Door hand direction depends on which lever you select, so have the swing of the opening settled before you order rather than after the box arrives. Three lever designs are offered: LC, LR and LG.

Grade 2 is a commercial rating, not a residential one. The C540 is certified to ANSI/BHMA A156.2 Series 4000 Grade 2 and the chassis is built for commercial traffic, which is the tier normally written for guest room, apartment and office bath doors. Grade 1 sits above it for high abuse openings. If your spec sheet calls out Grade 1 on privacy doors, the Cal-Royal CAL20 Calypso is a Grade 1 privacy lock.

No. A privacy lock like the C540 puts a lock on the inside of the door, which is what you want on a bath or bedroom and exactly what you do not want on a closet or corridor door someone can be shut behind. Use a passage function there instead: the Orca Hardware OCL210 is a Grade 2 passage cylindrical lockset, the Cal-Royal CAL30 is a Grade 1 passage lock fitting 1-3/8 to 2 inch doors, and the Marks USA 195N is a Grade 1 passage lever. Where the leaf is inactive and needs a lever for looks only, the Orca OCL2170 is a Grade 2 half dummy.

The Orca Hardware OCL240 is the nearest match, a Grade 2 medium duty privacy cylindrical lockset. Step up and the Cal-Royal CAL20 is a Grade 1 extra heavy duty privacy lock covering 1-3/8 to 2 inch doors, which is the one to reach for on a thicker leaf or a higher traffic opening. Watch what looks like a substitute but is not: the Marks USA 175RF is also a Grade 2 clutched lever on a 2-3/4 inch backset, but it is a storeroom function with a small format IC, so it is keyed and it will not give you the room side privacy lock.

Yes, two peers carry the privacy function on an electronic cylindrical chassis. The Schlage CO-100 is a Grade 1 heavy duty standalone electronic cylindrical lock with a privacy function and keypad, built for 1-3/4 inch doors. The Alarm Lock Trilogy 4100 is a Grade 1 electronic cylindrical lock with a privacy function and keypad for doors 1-5/8 inch to 1-7/8 inch. The Dorma C540 is a mechanical Grade 2 privacy lever that takes no batteries and no programming, and it adjusts for doors 1-3/8 inch to 1-3/4 inch, so the thinner doors in a building stay with the C540 while the electronic options need the heavier leaf.

The Dorma C540 is a non-keyed Grade 2 privacy lever, which suits bedrooms and restrooms but not a storeroom that has to stay locked and key-operated. The Marks USA 175RF SFIC is a Grade 2 storeroom clutched lever lockset supplied less core for a small format interchangeable core, with a 2-3/4 inch backset and an ANSI strike, matching the C540 backset. That combination lets one facility keep the same grade and the same door prep across privacy doors and locked service doors while the storeroom side runs on the site core system.

The Dorma C540 handles the privacy/bed/bath openings; hall and closet doors take a passage lever that latches without locking. The Cal-Royal CAL30 is a Grade 1 extra heavy duty passage lockset in the Calypso series rated for doors 1-3/8 inch to 2 inch, which is the passage companion to the Grade 1 CAL20 privacy lock. The Marks USA 195N is a Grade 1 Survivor series passage lever with an American lever and ADA compliant trim, which is the one to quote when the facility has an accessibility requirement on corridor doors.

They mean two different things. Keyless on the Dorma C540 means non-keyed: it is a privacy/bed/bath lever with no cylinder, locked from the inside of the room. Keyless on the Lockey 1600 means a heavy duty mechanical knob lock entered by code with an adjustable backset, and the Lockey 2830 is a mechanical pushbutton knob lock with an auto-locking passage function. Those are code entry knobs for controlling who gets through a door, while the C540 is a lever that simply gives a bedroom or bathroom privacy. If the requirement is access control without a key, the Lockey units answer it; if it is a private room, the C540 is the function being asked for.

Six finishes are offered: 605 bright brass, 606 satin brass, 613 oil rubbed bronze, 619 satin nickel, 625 bright chrome and 626 satin chrome. All three lever designs, LC, LR and LG, are available in every one of those six, so you can hold a finish constant across a floor and still change lever style, or hold the lever and match a finish already running in the building. 626 satin chrome is the usual commercial default.

Yes, that is what the series is set up for. The C540 is the privacy function, and the C500 key-in-lever family runs ten functions on the same high performance cylindrical chassis, so the bath doors, the offices and the storage rooms can carry the same lever design and the same finish while each opening gets the function it needs. The keyed functions in the family can also take an optional patented key system if you are building a restricted keyway for the property.

Use a dummy trim rather than a privacy lockset. The Dorma C540 is a working privacy/bed/bath lockset that ships with a 15230 2-3/4 inch backset latch and a 5001 ANSI 1-1/4 inch by 4-7/8 inch square corner strike, so it needs a bored door and a strike prep in the frame. The Orca Hardware OCL2170 is a Grade 2 half dummy lever, which is surface mounted trim with no latch and no strike prep, for pull-only leaves and closets.

The CENTRIOS CEB100 is a Grade 1 smart Bluetooth cylindrical lock with a privacy function, so it covers the same door use as the Dorma C540 while adding phone based credentialing. The C540 is the purely mechanical route: Grade 2, non-keyed, privacy/bed/bath, with nothing to pair, charge, or commission. On a multi-family or hospitality fleet the split usually falls the same way, with the C540 on interior bedroom and bath doors and the smart chassis reserved for doors that need an audit or remote credential.