Frequently Asked Questions and Precautions for Ordering Doors and Windows Online, Frequently Asked Questions**
Sectional Door Accessories: motor 220V-380V, control box, spring break device, cable break device , aluminum alloy rope pulley, enhanced shaft bracket, air bag system, duplex enhanced guide wheel bracket.
Detail introduction for above main accessories
1.Motor and controller:
The garage door operator is designed for residential overhead sectional and tilt doors.
The operator memorizes the limit positions and unique braking system that slows the unit down at the end of its travel.
Rolling code remote control with max. 20 pcs hand transmitters.
The operator is equipped with a manual release lever which allows manual operation of the door in case of power failure.
The controller has a security LOCK function which prevents operation of the door from transmitter.
2.spring break device:
Sectional doors are hinged and they bend in the tracks as the door opens and closes. Many of these doors are counterbalanced with extension springs, also designated "stretch springs," and they have seven characteristics. The length is the measurement of all the coils pressed together. This, along with the inside diameter of the coils and wire size - the thickness of the wire from which the springs are made - determine the stretch, the distance the spring is extended - normally half the door height, and pull, the force the spring pulls when stretched its normal length. The type of ends determine how the ends of the spring are mounted. The initial tension is the percentage of pull needed to separate the coils. This is determined by the pitch with which the springs are wound. On sectional garage door springs this is normally 15 percent. For example a 100 pound pull spring requires 15 pounds of weight to separate the coils; when a door is open the two springs will support 15 pounds of door weight without any stretch.
Most extension springs are made of oil tempered wire. These are normally coated or painted. Some springs are made of galvanized wire.
3.able break device:
cable break device ,door hardware
adjustable bottom bracket .
the raw material hot plate
zinc plated
safety device
adjustable bottom bracket
the raw material hot plate
zinc plating
spring safety device ,2" and 3" safety device
once the cable is broken ,this devoice can keep the hurt away from the door falling
4.aluminum alloy rope pulley
Equipment: CNC stamping/punching machine, CNC bending machine, CNC cutting
machine, 5~250 tons punching machines, welding machine, polish machines...
Processed material: stainless steel: copper, carbon steel
Surface treatment: Hot galvanized, polishing
Making process:Stamping, deep drawing,bending, punching, laser cutting,threading,
welding, tapping, riveting, grinding
5.air bag system
It is a safety device. When the door is down to hit something, it will up automatically.
Operation pressure:<3mbar
Battery:CR2032*2
Battery lifetime>1 year
Emission frequency: 315MHZ
Emission power:<10mW
Receiver power source:12V
6.duplex enhanced guide wheel bracket
Determining the right type of sectional door roller for your garage door tracks can be a little confusing, especially when you do not know what you need to look for in a garage door roller. To simplify things, there are two primary things you need to be aware of. First are the actual dimensions of the roller, and second is purpose that you will be using the door for. You can read below about measuring your roller and choosing the right quality of material for your door.
Is there a risk in fixing the door and window online?
A: Our products are factory direct sales. Our factory belongs to the door and window service processing enterprise. There is a formal contract, which requires both parties to sign and pay the deposit contract. For those who are not at ease, they can inspect the craftsmanship and materials and equipment of the factory workers. Some people in the factory will receive explanations.
Can you save money by setting up windows on the Internet?
A: 100% can. All the prices of the shop are ex-factory prices, which are factory direct sales, and the cost of the building materials city exhibition hall is abandoned. No middlemen profit from it. And the price is reasonable.
What is the online purchase of windows and doors?
A: The procedure is to agree on the price, field measurement, contract signing, production, door-to-door installation and after-sales service.
I want to set the door and window, but how to pay the deposit?
A: The payment deposit method is cash payment. After the measurement is completed, firstly design drawings, customer confirmation, delivery deposit, start production, on-site installation, installation completion, settlement payment, and after-sales service.
Does it include installation?
A: The above prices include installation, and shipping charges in Beijing are also included. Foreign customers will charge the freight far and near, and the installation fee will be charged appropriately.
How to measure the size and calculate the door and window area?
Answer: The single window is less than 1 square meter and is calculated according to 1 square meter. The single door is less than 2 square meters and calculated according to 2 square meters. The rest is calculated according to the actual size.
Second, matters needing attention
1. The goods sold will not be returned. Please read the product function carefully before buying.
2. Doors and windows of the same city transaction, our company is free to measure and install for you.
3. Because of the special nature of the network, factors such as chromatic aberration are difficult to avoid, please be sure to ask the buyer before buying.
4. The product page and the picture are only a brief introduction to the product, and all the parameters of the product are subject to the actual product.
5. The product must be installed by a professional installer. We are not responsible for any damage caused by improper loading. Http://news.chinawj.com.cn Submission:
Other Door Accessories,Electronic Door Accessories,Automatic Door Accessories,High Speed Door Radar Detector
Shenzhen Hongfa Automatic Door Co., Ltd. , https://www.hfrollershutterdoor.com