Throughout the renovation process, the decoration company often uses the customer's knowledge of the decoration to cleverly set up traps so that customers can suffer losses. Here are a few decoration companies commonly used decoration traps?
Decoration Common Pitfalls 1: Demolition (Project Name)
When a project was split into several projects, the unit price went down and the total price went up. This trap is a common trick for decoration companies.
Example: Dismantling Plastered Bricks into Walls Basement Treatment and Plastering Wall Tiles Two projects to separate emulsion paint into wall surface PuTTY and brush latex paint Two items Separate the triangle valve and metal hose in the toilet installation project Listed into two projects
Trap used in decoration II: Unit transformation
Change the item that should have been quoted in square meters to the price quoted in meters. Example: Door covers General decoration companies are only quoted, but some decoration companies are quoted by meters. Such a door cover becomes 5 meters, and the unit price goes down. The total price went up.
Decoration trap three: play on the amount of work
Many companies often use traps to get higher profits. For example, latex paint does not deduct the area of ​​door and window openings. The kitchen and bathroom tiles are counted in full shops, but when posted, they stick only to the places seen by their eyes. The back of the cupboard was not affixed with some intentional miscalculations and over-reported the amount of work. When it was discovered, some of the errors due to the calculation of the budget were due to deliberately underreporting the amount of work. The contract was negotiated at a low price, and the work was done halfway. Calculation error, request for additional payment
Decoration commonly used trap four: main material unit play pattern
Instead of brand-name products with a clear price, they are replaced with products that have no name, so that consumers do not know the price
Decoration commonly used trap five: reported high accessories prices
The research on the main materials by consumers is more detailed, and the price of accessories is not clear. Therefore, the decoration company designs traps for commonly used auxiliary materials.
Such as: latex paint accessories offer 6 yuan / square meter, and the actual price of 2 yuan / square meters
Six traps commonly used in renovations: prices of main materials and accessories are not reported separately
Decoration companies often use this trick to fish in troubled waters.
Such as: floor 200 yuan / square meter, including accessories, that decoration company may only take 150 yuan / square of the product used up, but also the United States its name is not even your accessories price
Trap 7: Repeat Calculation
The door installation is already included in the hinges. Flooring has already been counted in the floor nails. Then a project “hardware†is added at the end of the project. It is 3,000 yuan. When the budgetary says what materials it is, the answer is not known. This is the first few. The traps used by small companies in the year are less used now.
Entrance decoration study room decoration door price paint latex paint toilet window decoration find decoration company okay floor tile kitchen wall tile cabinet door kitchen cabinet door bathroom design bathroom wall tile bathroom floor tile bathroom door
A ball check valve is a check valve in which the closing member, the movable part to block the flow, is a spherical ball. In some ball check Valves, the ball is spring-loaded to help keep it shut. For those designs without a spring, reverse flow is required to move the ball toward the seat and create a seal. The interior surface of the main seats of ball check valves are more or less conically-tapered to guide the ball into the seat and form a positive seal when stopping reverse flow.
Ball check valves are often very small, simple, and cheap. They are commonly used in liquid or gel minipump dispenser spigots, spray devices, some rubber bulbs for pumping air, etc., manual air pumps and some other pumps, and refillable dispensing syringes. Although the balls are most often made of metal, they can be made of other materials, or in some specialized cases out of artificial ruby. High pressure HPLC pumps and similar applications commonly use small inlet and outlet ball check valves with both balls and seats made of artificial ruby, for both hardness and chemical resistance. After prolonged use, such check valves can eventually wear out or the seat can develop a crack, requiring replacement. Therefore, such valves are made to be replaceable, sometimes placed in a small plastic body tightly-fitted inside a metal fitting which can withstand high pressure and which is screwed into the pump head.
There are similar check valves where the disc is not a ball, but some other shape, such as a poppet energized by a spring. Ball check valves should not be confused with Ball Valves, which is a different type of valve in which a ball acts as a controllable rotor to stop or direct flow.
A diaphragm check valve uses a flexing rubber diaphragm positioned to create a normally-closed valve. Pressure on the upstream side must be greater than the pressure on the downstream side by a certain amount, known as the pressure differential, for the check valve to open allowing flow. Once positive pressure stops, the diaphragm automatically flexes back to its original closed position.
A swing check valve or tilting disc check valve is check valve in which the disc, the movable part to block the flow, swings on a hinge or trunnion, either onto the seat to block reverse flow or off the seat to allow forward flow. The seat opening cross-section may be perpendicular to the centerline between the two ports or at an angle. Although swing check valves can come in various sizes, large check valves are often swing check valves. The flapper valve in a flush-toilet mechanism is an example of this type of valve. Tank pressure holding it closed is overcome by manual lift of the flapper. It then remains open until the tank Drains and the flapper falls due to gravity. Another variation of this mechanism is the clapper valve, used in applications such firefighting and fire life safety systems. A hinged gate only remains open in the inflowing direction. The clapper valve often also has a spring that keeps the gate shut when there is no forward pressure. Another example is the backwater valve (for sanitary drainage system) that protects against flooding caused by return flow of sewage waters. Such risk occurs most often in sanitary drainage systems connected to combined sewerage systems and in rainwater drainage systems. It may be caused by intense rainfall, thaw or flood.
A stop-check valve is a check valve with override control to stop flow regardless of flow direction or pressure. In addition to closing in response to backflow or insufficient forward pressure (normal check-valve behavior), it can also be deliberately shut by an external mechanism, thereby preventing any flow regardless of forward pressure.
A lift-check valve is a check valve in which the disc, sometimes called a lift, can be lifted up off its seat by higher pressure of inlet or upstream fluid to allow flow to the outlet or downstream side. A guide keeps motion of the disc on a vertical line, so the valve can later reseat properly. When the pressure is no longer higher, gravity or higher downstream pressure will cause the disc to lower onto its seat, shutting the valve to stop reverse flow.
An in-line check valve is a check valve similar to the lift check valve. However, this valve generally has a spring that will 'lift' when there is pressure on the upstream side of the valve. The pressure needed on the upstream side of the valve to overcome the spring tension is called the 'cracking pressure'. When the pressure going through the valve goes below the cracking pressure, the spring will close the valve to prevent back-flow in the process.
A duckbill valve is a check valve in which flow proceeds through a soft tube that protrudes into the downstream side. Back-pressure collapses this tube, cutting off flow.
A pneumatic non-return valve.
Multiple check valves can be connected in series. For example, a double check valve is often used as a backflow prevention device to keep potentially contaminated water from siphoning back into municipal water supply lines. There are also double ball check valves in which there are two ball/seat combinations sequentially in the same body to ensure positive leak-tight shutoff when blocking reverse flow; and piston check valves, wafer check valves, and ball-and-cone check valves.
Check Valves, Water Check Valves, Brass Check Valves, Sanitary Check Valves
ZHEJIANG KINGSIR VALVE CO., LTD. , https://www.kingsirvalves.com