Something about the door closer
2010-01-19

                                                                                           Something about the door closer 

             Today we pay attention to the security of the house. So we use the door closer to do that. A door closer is a mechanical device that closes a door, in general after someone opens it, or after it was automatically opened. There are two general styles of door closers: manual and automatic.

            Manual door closers come in two main forms, overhead and jamb mounted. Overhead door closers, such as those from Briton, Dorma and Geze, can be concealed or surface mounted, whereas jamb mounted closers, such as Perko-Powermatic, fit between the door and the door frame and are totally concealed when the door is closed.  

         A manual door closer stores the energy used in the opening of the door and releases it to close the door. To limit the speed at which the door closes, common door closers use hydraulic (oil-filled) dampers, although spring mechanisms may also be used. The speed at which the door closer closes the door may be adjustable by up to two set screws. These screws often adjust the sweep speed and the latch speed of the door. The latch speed is the speed that the door travels in the last third to 10 degrees as it closes and is often set fast so that the door can properly latch closed. The sweep speed is the speed which the door travels at along the first two thirds of its travel and is often set slower than the latch speed. Door closers which provide this two-stage action and close doors at a determined rate are called 'controlled' door closers.  

        Door closers are most commonly used on fire doors, which need to be closed in the case of fire to help prevent spread of the fire and smoke. Choosing a door closer can involve the consideration of a variety of criteria. In addition to the closer's performance in fire situations, other criteria may include resistance to opening forces (for use by disabled or infirm) as well as health, safety, durability, risk of vandalism/ligature and aesthetics.   

      An automatic door closer (more often called door opener) opens the door itself, typically under the control of a push button, motion detector or other device, and then closes it as well, typically employing a motion or proximity detector to determine when it is safe to close the door. Leading European manufacturers include Briton, Dorma, Geze and Samuel Heath.  

        In fact, we can see that the door closer has many different kinds. In today’s market, the manufactures have invented new products. They have many advantages in some ways. Let’s have a look at them.

 Telescopic door closer for heavy-duty applications 

     Taiwan – Massoud & Bros. Co. Ltd has launched model 5631, a heavy-duty closer suitable for metal and wooden doors.

       The telescopic product reaches a maximum length of 48cm. It employs step-on operation that holds and releases doors easily. A grooved stroke is said to improve the holding strength.

         The CE-certified model is available in versions with a standard conical or grooved tip. The housing is made of die-cast zinc. Aluminum, brown, black and brass finishes are offered. FOB Taiwan price is provided on inquiry. The minimum order is $5,000 worth, deliverable in 35 to 60 days after order confirmation. Massoud & Bros. was established in 1976. It also makes ball bearing wheels and rollers, door and cabinet locks, window fittings and fasteners.

         So the products of door closers have new technology to meet the customs needs. It is powerful in our life. Certainly here is some detail products information.

MPOWR MP-800 Rotary Door Closer 

Our Price: $38.00 286 Units In-Stock Part No: MPR-MP-800 Manufacturer: MPOWR Model No: 800 Quantity Discounts Quantity Amount 2 to 5 $36.10 6 or more $34.20 Formally known as the Ives C930 Rota-Closer, the MPOWR Model 800 is for use on lightweight interior, screen or storm doors. Small rotary closer regulates door closing speed. • Designed for interior, storm or screen doors up to 35 lbs. • Other uses includes laundry chutes, garbage chutes and metal storage compartments • Non-handed, works with both left and right-hand doors • Aluminum finish • Approximate product dimensions: 1-3/4" Dia. x 3"

MPOWR MP-805 Hydraulic Door Closer

 Our Price: $59.00 Inventory Due on 8/19/2008 Part No: MPR-MP-805 Manufacturer: MPOWR Model No: 805 Quantity Discounts Quantity Amount 2 to 5 $56.05 6 or more $53.10 The MPOWR Model 805 Power Closer is ideal for use on interior solid-core wood and metal doors (85 lbs. maximum) up to 3'-0" (width) and 7'-0" (height). • Hydraulic door closer for interior, solid core wood or medium weight metal doors. • UL/ULC listed, fire code approved • Full size template for easy installation • Gray powder-coat finish • Approximate product dimensions: 3-1/2" H x 2-3/4" W x 2" D

Residential Door Clsr Ivory Product Description Door Closers Residential Automatic - Hydraulic 30`` Max Door Width - 85 Lbs Max Door Weight Finish=Ivory Aluminum die cast body with steel arm to resist corrosion. Heat treated steel and pinion for smooth action and minimum wear. Compact size with decorative finished cover suits most interior and exterior applications. Product Details Price From: $25.49 Manufacturer: Mintcraft Hardware 1 Model Number: C101BHSAIV UPC Number: 050134901032  

          In a word, I think whether how well the products are, we need its secure. I know many door closer is gaining favor with increasing numbers of health authorities across the country, thanks to the many benefits that the closer’s concealment delivers to the health sector. We can believe their secure.