Z541h Bevel Gear Gate Valve Stainless Steel Cast Steel

• Media: Water-Vapour Oil
• Driving Mode: Manual Pneumatic Electric
• Connection Form: Consideration Flange Welding
• Structure: Centre Sealing
• Seal Form: Hard Seal and Soft Seal
• Valve Stem: Normal
• Model NO.: Z541H
• Work Pressure: Low and High Pressure
• Working Temperature: Ultra Low Temperature (T<-100°C)
• Material of Seal Surface: Soft Sealed
• Valve Body: Casting
• Standard: DIN GB ANSI Bsw JIS
• Application: Industrial Usage, Water Industrial Usage, Household Usage
• Transport Package: Wooden Box
• Specification: DN15-DN800
• Trademark: xc
• Origin: China
• HS Code: 8481804090
• Production Capacity: 9999

Product Description

The opening and closing part of the gate valve is the gate plate, the direction of motion of the gate plate is perpendicular to the direction of the fluid, and the gate valve can only be fully opened and fully closed, and can not be adjusted and throttled. The gate has two sealing faces, the most commonly used mode of the gate valve two sealing faces form a wedge, the wedge Angle varies with the valve parameters, usually 50, the medium temperature is not high when 2°52'. The disc of the wedge valve can be made into a whole body, which is called the rigid disc; It can also be made to produce a micro deformation of the gate, in order to improve its processability, make up for the Angle of the sealing surface in the process of deviation, this gate is called elastic gate.
The type of gate valve, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, double gate type and elastic gate type; Parallel gate valve can be divided into single gate and double gate valve. According to the screw position of the valve stem, it can be divided into two kinds: open rod gate valve and dark rod gate valve.
When the gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, only rely on the medium pressure to press the sealing surface of the gate plate to the seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most of the gate valves are forced to seal, that is, when the valve is closed, it is necessary to rely on external forces to force the gate to the seat to ensure the sealing of the sealing surface.
The gate valve's gate plate moves in a straight line with the valve stem, which is called the lifting lever gate valve (also called the Ming lever gate valve). Usually there are trapezoidal threads on the lifting rod, through the nut at the top of the valve and the guide groove on the valve body, the rotating motion becomes a straight line movement, that is, the operating torque becomes the operating thrust.
When the valve is opened, when the lift height of the gate is equal to 1:1 times the diameter of the valve, the channel of the fluid is completely unimpeded, but during operation, this position can not be monitored. In actual use, the vertex of the valve stem is used as a sign, that is, the position of the opening cannot be moved, as its fully open position. In order to consider the temperature change, the phenomenon of locking is usually opened to the apex position, and then back 1/2-1 turns, as the position of the fully open valve. Therefore, the full open position of the valve is determined by the position of the ram (that is, the stroke >.
Some gate valve, the valve stem nut is located on the gate, the hand wheel rotation drives the valve stem to rotate, and the gate plate is lifted, this valve is called the rotating rod gate valve or the dark rod gate valve.
The working principle of manual gate valve:
Turn the hand wheel, through the hand wheel and the valve stem thread forward, back, lift or drop the valve plate connected with the valve stem, to achieve the role of opening and closing
Gate valves have the following advantages:
The fluid resistance is small, the sealing surface by the medium of the hand brush and erosion is small.
Less effort to open and close.
The flow of the medium is not limited, does not disturb the flow, does not reduce the pressure.
The shape is simple, the structure is short, the manufacturing process is good, and the application range is wide.
The disadvantages of gate valve are as follows:
The sealing surface between easy to cause erosion and abrasion, maintenance is more difficult.
The shape size is large, the opening needs a certain space, and the opening and closing time is long.
The structure is more complex.
The type of gate width, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, double gate type and elastic gate; Parallel gate valve can be divided into single gate and double gate valve. According to the screw position of the valve stem, it can be divided into two kinds: open rod gate valve and dark rod gate valve.
The installation and maintenance of gate valve should pay attention to the following matters:
Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
Double ram gate valves should be installed vertically (i.e. the stem is in a vertical position with the handwheel at the top).
Gate valves with bypass valves should be opened before opening (to balance the pressure difference between the inlet and outlet and to reduce the opening force).
The gate valve with the transmission mechanism shall be installed according to the instructions of the product.
Lubricate the valve at least once a month if it is used on and off frequently.
Structural features:
For a long time, the general gate valve used on the market generally has water leakage or rust phenomenon. The elastic seat seal gate valve produced by the introduction of European high-tech rubber and valve manufacturing technology has overcome the general gate valve poor seal, rust and other defects. The elastic seat seal gate valve uses the elastic disc to produce a small amount of elastic deformation compensation to achieve good sealing effect. The valve has the obvious advantages of light switch, reliable seal, good elastic memory and service life. It can be widely used in tap water, sewage, construction, petroleum, chemical industry, food, medicine, textile, electric power, ship, metallurgy, energy system and other body pipelines as a regulating and intercepting device used.
The characteristics of gate valve:
Light weight: the body is made of advanced ball black cast iron, the weight is reduced by about 20% to 30% compared with the traditional gate valve weight, convenient installation and maintenance.
Flat-bottom gate seat: the traditional gate valve is often in the water washing pipe because of foreign objects such as stones, wood blocks, cement, iron debris, debris and other sludge in the bottom groove of the valve, easy to cause the formation of water leakage phenomenon, elastic seat sealing gate valve bottom with the same flat bottom design of the pipe machine, not easy to cause debris deposition, so that the fluid is unimpeded.
The whole package: the gate adopts high-quality rubber for the whole inside and outside the rubber, Europe's first-class rubber vulcanization technology makes the vulcanized gate to ensure the precise geometric size, and the rubber and ductile casting gate is then reliable, not easy to fall off and elastic memory is good. water
Precision casting valve body: The valve body is precision cast, the precise geometry makes the valve body without any finishing inside to ensure the sealing of the valve.
Gate valve has the following advantages:
1, the fluid resistance is small, the sealing surface is brush and erosion of the medium is small.
2, less effort to open and close.
3, the medium flow is not limited, does not disturb the flow, does not reduce the pressure.
4, simple shape, short structure length, good manufacturing process, wide range of application.
The disadvantages of gate valve are as follows:
1, the sealing surface between easy to cause erosion and abrasion, maintenance is more difficult.
2. The shape size is large, the opening needs a certain space, and the opening and closing time is long.
3, the structure is more complex.
The type of gate width, according to the sealing surface configuration can be divided into wedge gate valve and parallel gate valve, wedge gate valve can be divided into: single gate type, double gate type and elastic gate type; Parallel gate valve can be divided into single gate and double gate valve. According to the screw position of the valve stem, it can be divided into two kinds: open rod gate valve and dark rod gate valve.
The installation and maintenance of gate valve should pay attention to the following matters:
1. Handwheel, handle and transmission mechanism are not allowed to be used for lifting, and collision is strictly prohibited.
2, the double gate valve should be installed vertically (that is, the valve stem is in a vertical position, and the handwheel is at the top).
3, the gate valve with a bypass valve should be opened before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force).
4. The gate valve with transmission mechanism shall be installed according to the provisions of the product instruction manual.
5, if the valve is often used on and off, lubricate at least once a month.