Z45X concealed soft seal gate valve

The Z45X concealed soft seal gate valve usually has trapezoidal threads on the lifting rod. Through the valve nut and the guide groove on the valve body, the rotational motion is converted into linear motion, that is, the operating torque is converted into operating thrust. When opening the valve, when the lifting height of the gate is equal to 1:1 times the valve diameter, there is no obstruction to the fluid channel, but this position cannot be monitored during operation. In actual use, the vertex of the valve stem is used as a marker, that is, the position where it cannot be opened, as its fully open position. To consider the phenomenon of locking due to temperature changes, it is usually done by opening the valve to the top position and then reversing it by 1/2-1 turn as the position for fully opening the valve. Therefore, the fully open position of the valve is determined by the position stroke of the gate

The opening and closing component of Z45X concealed soft seal gate valve is the gate, and the movement direction of the gate is perpendicular to the fluid direction. The gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate valve has two sealing surfaces, and the two sealing surfaces of the commonly used mode gate valve form a wedge shape. The wedge angle varies with the valve parameters, usually 50 degrees, and 2 ° 52 degrees when the medium temperature is not high. The gate of a wedge gate valve can be made as a whole, called a rigid gate; It can also be made into a gate that can produce slight deformation to change its processability and compensate for the deviation of the sealing surface angle during the processing. This type of gate is called an elastic gate

The Z45X concealed soft seal gate valve, in addition to the advantages of an elastic seat seal gate valve, is commonly used for opening and closing in fire and industrial systems, and is generally installed at a higher height above the ground

Material introduction of Z45X concealed rod elastic seat sealing gate valve:

1. The valve body material should mainly be ductile iron, cast steel, stainless steel, 316L, and indicate the brand and actual physical and chemical testing data of the cast iron

Secondly, the valve stem material should strive for stainless steel stem (2CR13), and large-diameter valves should also have stainless steel embedded stem

Thirdly, the nut material is made of cast aluminum brass or cast aluminum bronze, and its hardness and strength are greater than those of the valve stem

4. The material of the valve stem liner should have a hardness and strength not greater than that of the valve stem, and should not form electrochemical corrosion with the valve stem and valve body when immersed in water

5. Material of sealing surface:

1. The Z45X concealed rod elastic seat sealing gate valve has different categories, sealing methods, and material requirements

2、 The material, fixing method, and grinding method of the copper ring for ordinary wedge gate valves should be specified

3、 Physical, chemical, and hygiene testing data for soft sealed gate valves and valve plate lining materials

6. Valve Shaft Packing

1. Due to the infrequent opening and closing of Z45X concealed rod elastic seat sealing gate valves in the pipeline network, it is required that the packing should not move for several years, and the packing should not age, maintaining the sealing effect for a long time;

2、 The valve shaft packing should also have good sealing performance when subjected to frequent opening and closing

3、 In view of the above requirements, the valve shaft packing should be kept unchanged for life or not disassembled or replaced at all

4、 If the packing needs to be replaced, the design of the pneumatic valve should consider measures for replacement under water pressure conditions

Features of Z45X concealed soft seal gate valve:

1、 The valve body material should mainly be cast iron, cast steel, and stainless steel, and the grade and actual physical and chemical testing data of the cast iron should be indicated

2、 The valve stem material should strive for stainless steel valve stems, and large-diameter valves should also have stainless steel embedded valve stems

3、 The nut material is made of cast aluminum brass or cast aluminum bronze, and its hardness and strength are greater than those of the valve stem

4、 The material of the valve stem liner should have a hardness and strength not greater than that of the valve stem, and should not form electrochemical corrosion with the valve stem and valve body when immersed in water

5、 Material of sealing surface

6、 Integral encapsulation: The valve adopts integral encapsulation, which has good coverage, accurate geometric dimensions, sealing, and long service life

7、 Lightweight: The valve is made of ductile iron, which is lightweight and easy to install

8、 Flat bottomed valve seat: The bottom adopts the same flat bottomed valve seat design as the water pipe, which is not easy to accumulate debris and is sealed

9、 Sex: The inner cavity is coated with epoxy resin to prevent corrosion and rust. It can not only be used for drinking, but also for sewage systems

10. O-ring sealing: The valve stem is sealed with three O-ring seals, which have low friction resistance, light opening and closing, and no water leakage

Technical parameters of Z45X concealed soft seal gate valve:

nominal diameter: DN40-DN400

pressure rating: 1.0MPa, 1.6MPa, 2.5MPa

valve body pressure resistance: 1.5MPa, 2.4MPa, 3.75MPa

sealing test: 1.1MPa, 1.76MPa, 2.75MPa

working temperature: 0-80 ℃

applicable media: water, oil, steam, etc.