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Types of Hinges for uPVC Doors If your uPVC door is hanging or dropping it could be because of hinges To ensure that your uPVC doors work smoothly you may have to adjust the hinges or even replace them completely Hinges are made up of hinge leaves or flat plates along with knuckles and a hinge pin They permit the lateral or compression adjustment Butt Hinges There are a variety of kinds and sizes of hinges Each has distinct characteristics to meet different requirements for installation Butt hinges are an extremely useful kind of hardware that provides strength and durability for doors They are also available in a wide range of styles and finishes to match the style of the door or the installation area There are also special hinges to meet specific requirements like pivoting or fully concealed barrel hinges A butt hinge consists of two leaves that have three or more pins knuckles and a curved barrel The barrel or knuckle is the pivot point of the hinge It is typically connected to the leaves by screws Butt hinges are able support more weight than other hinges This is due to their bigger knuckle which provides more support for the leafs Butt hinges are more resistant to extreme temperatures since they are more able for expansion and contraction Furthermore Butt hinges are designed to be placed on recessed surfaces This means theyre not visible when the door is opened or closed This results in a smoother appearance and a more refined aesthetic They may need routing to create an even finish Butt hinges come with a disadvantages For example the amount of friction they produce can wear down the hinge over time To prevent this from happening it is recommended to clean and lubricate the hinges This will prevent friction from tearing the knuckles and ensure they function smoothly Some hinges with butts utilize a ball bearing between the knuckles in order to reduce friction They are perfect for heavyduty doors that experience frequent use These are also available with pins that are fixed making them ideal for doors that cant be opened by removing it Other types of butts hinges include a plain bearing lubricated with grease which reduces friction and allows the hinge to move with minimal force These are recommended for use on lighter items such as cabinet doors window hinge repairs can also be purchased with spinends that ensure the pin will remain in the correct position Butt hinges are typically used in residential settings but they are also used in industrial and commercial applications For instance they are employed in medical and research establishments to shield patients from contamination by neutrons and radiation and also for vault doors and security systems They are also used in the military and defense industry to secure armored vehicles as well as transporters They are typically constructed of stainless steel or brass for enhanced durability and resistance to corrosion Flag Hinges A hinge is a mechanical device that connects two pieces and allows them to move around a fixed location Hinges are typically made from metal and come in a variety of designs sizes and capacities of weight for various applications They are found on a wide range of items from doors to lids and enclosures and are available in a variety of styles to fit the design of the product There are various kinds of hinges commonly used on doors and uPVC windows These hinges include butt flag and continuous hinges Butt hinges support the sash that is on the door and provide the stability required to ensure smooth operation They also last a long time They are designed to be placed between the door frame and sash giving an unobtrusive clean appearance when closed They permit the door to open or close easily around the pin that connects the two hinges They also spread the weight of the sash evenly over time to ensure more efficient performance Butt hinges come in a variety of sizes and loads to fit various door sizes and weights The kind of hinge chosen will depend on the use and the desired level of performance and durability The capacity of the hinge to bear loads is determined by the quantity and duration of pressure applied to it A hinge that is strongerduty is needed for applications that require a lot of force Flag hinges are a common kind of hinge for doors and are suitable for a variety of door sizes and applications They are smaller and lighter than other hinges This makes them perfect for doors that weigh less They are also extremely robust and can stand up to an enormous amount of force making them an ideal choice for use in heavilytrafficked areas The first step to install the flag hinge is to mark the locations of the pinlocating and screw holes This can be done on the door sash and the hinge body Make the holes through using the fixing jig then screw the hinge onto the sash in a way that it is in line with the profile Make sure that the screws that are furthest from the hinge body are anchored to steel reinforcing instead of the wood of the sash to prevent damage to the sash or frame Then insert the hinge body pin through each of the slots that are used to locate the plate Secure it with the corresponding screws For the majority of applications using standard uPVC will require three hinges The top flag hinge should be placed 150mm above the top edge and the bottom middle and outer hinges should be placed evenly between them To verify the correct placement of the hinges the door sash must be closed and raised to its full height and you should be able see the hinges in their entire length when they are raised If not the hinges may be too separated The door will not function smoothly or securely