Can the QF 10 valve and the CGA660 valve be docked?

Which is the best manufacturer of valves in Shanghai? There are many valve manufacturers in Shanghai, specifically which one is the best, in fact, it is very difficult, this depends on where you can evaluate it conveniently, each manufacturer produces different valve products, and the fields involved are also very different, for example, some are doing water systems, some are doing industrial systems, and industrial systems are divided into many fields, such as: electric power, chemical industry, petroleum, pharmaceuticals and many other fields.

Here is a brief introduction to a few companies, Shanghai Qizhong valve in the field of water system, Suzhou Neway valve, Shanghai Guanlong valve this unit is not bad, industrial valve field can also be.

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. Although the ranking may change due to time and market conditions, the following brands are generally considered to be one of the top brands in the valve industry: water system valves and industrial valves The following more influential first-line brands can be used as a reference, and the following are the top ten domestic first-line valve brand manufacturers in 2022-2023, but for reference only:

Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Suyan, Shentong, Su Valve, Nanfang, Jiang.

First, the word Yao. The above manufacturers are only estimates and references, and the specific situation may vary or fluctuate at any time due to changes in a series of factors such as changes in the market, the size of the competition pattern, and the stability of product quality. As an indispensable key device in industrial production and civil facilities, the quality and reputation of the valve brand directly affect the satisfaction and trust of users.

It is easy to maintain, the electric ones are dual-purpose flashlights, and the switching speed is slow.

Three. 2. Good effect on liquid medium and large diameter gas

It is affected by the fluctuation of air compressor pressure, is not affected by climate, and is susceptible to the influence of air compressor water content in the northern winter. It is not affected by the pressure of air compressed air: it has a good effect on gaseous media and small pipe diameter liquids, and the pneumatic valve uses compressed air as power

The cost is high, and the ** of gas dual-use is relatively high.

1) Advantages of electric valves. And pneumatic to hand. Shortcoming. Disadvantages、Not good in a humid environment。 The pneumatic valve opens and closes quickly.

2) Pneumatic valves have the advantages and high precision, but they need a stable air source and low cost, which causes the transmission part to freeze and not operate. Generally, pneumatics are faster than electric, and the actuator will have teeth jamming for a long time. Electric valves are used in some places with large pipe diameters, because pneumatics are difficult to do, but the stability of electric valves is not as good as pneumatic.

Electric valves use an electric motor to power them.

There is a difference in material and usage.

This A is set by the enterprise, and you need to ask the manufacturer what it means.

CGA series 330, 350 and other valves made of stainless steel can take a variety of carbon monoxide, hydrogen sulfide, chloromethane and other gases.

There is no hard and fast rule in this regard. But:

Direct connections are often detrimental to construction, operation, inspection and maintenance;

The mass of the valve is relatively large, and it is easy to cause stress failure in the case of large vibration, and the direct connection will exacerbate this situation.

Therefore, the above situation should be considered when the valve is directly connected.

GB 50235-2010 "Code for Construction of Industrial Metal Pipeline Engineering".

Valve installation. Before the valve is installed, the model should be checked according to the design document, and the installation direction should be determined according to the flow direction of the medium.

When the valve is flanged or threaded to the pipe, the valve should be installed in the closed state.

When the valve is welded to the pipe, the valve should be installed in the open state. The bottom layer of the butt weld should be argon arc welded, and anti-deformation measures should be taken for the valve.

The valve should be installed in a location that is easy to operate, inspect and service. The valve on the horizontal pipeline, its stem and transmission device should be installed according to the design regulations, and the action should be flexible.

All valves should be connected naturally and should not be strongly docked or subjected to external heavy loads. The tightening force of the flange connection bolt should be uniform.

The installation of the safety valve shall comply with the following provisions:

1 The safety valve should be installed vertically.

2. The outlet pipe of the safety valve should be connected to a safe place.

3. When the shut-off valve is set on the inlet and outlet pipeline, it should be sealed and locked in the fully open state.

When the industrial metal pipeline is put into trial operation, it should be in accordance with the current national standard "Safety Valve Safety Technical Supervision Regulations".

The relevant provisions of TSG ZF001 and the provisions of the design documents shall adjust the final setting pressure of the safety valve, and the adjustment record and seal shall be made.

It should be directly connected, but it can't be directly connected because of the installation location. For example, sometimes the flange valve is directly connected, and the bolt is not easy to on. Because the valves have a raised part, the bolt cannot pass through.

Or two butterfly valves, if they are directly connected, the two butterfly plates will meet, and the distance must be separated.

Yes, for example, the blowdown valve is connected directly to the valve in a group of two.

It is a gate valve made of low-pressure dark rod cast steel.

Replacing the traditional cast iron valve, the structure is compact, the design is reasonable, the valve rigidity is good, the channel is smooth, the flow coefficient is large, the flow coefficient is small, the structure is simple, and it is easy to maintain. The models are Z45H-10C, Z45H-16C, Z45H-25C. Its sealing surface is made of stainless steel and cemented carbide for a long service life.

The use of flexible graphite filler, reliable sealing, light and flexible operation.

Z45T-10 is one of the sizes of Z45H-16C dark rod gate valve, the other is Z45-16(C).

JB T 308 provides.

The body material code of gray cast iron valves with nominal pressure less than or equal to is omitted in the preparation of the model.

Therefore, its valve body is made of gray cast iron, and the sealing surface is copper alloy.

Z45T is a gate valve (Z), a dark rod single ram (45), and a copper seal (T).

Cast iron, sealed inside is a copper alloy. Shanghai Yucheng Fluid specializes in the production of this thing, you can consult them 021-60706921

Z45T-10 refers to the gray cast iron valve with a nominal pressure of 1MPa. The meaning of its letters and numbers is:

z) indicates - gate valve;

4) indication - internal thread connection;

5) Representation-dark rod wedge rigid single ram;

t) Indication - The body is made of copper or copper alloy;

10) Indication - Nominal pressure 1 megapascal.

The opening and closing parts of the gate valve are the gate plate, the direction of movement of the gate plate is perpendicular to the fluid direction, and the gate valve can only be fully opened and closed, and can not be adjusted and throttled. The ram has two sealing faces, and the two sealing faces of the most commonly used mode gate valve form a wedge-shaped and wedge-shaped angle valve.

The body is made of gray cast iron, and the sealing surface is copper alloy.

It's a plug valve.

The plug valve is a shut-off or plunger-shaped rotary valve, which is a kind of valve that is opened or closed by rotating 90 degrees to make the channel port on the valve plug communicate or separate from the channel port on the valve body. The plug of a plug valve can be shaped in a cylindrical or conical shape. In cylindrical plugs, the channel is generally rectangular; Whereas, in a tapered plug, the channel is trapezoidal.

These shapes make the construction of the plug valve lightweight, but at the same time it incurs a certain loss. Plug valves are best suited for shut-off and turn-on media and shunt applications, but can sometimes be used for throttling depending on the nature of the application and the erosion resistance of the sealing surface.

Principle: The plug body with a through hole is used as the valve of the opening and closing parts. The plug body rotates with the valve stem to achieve opening and closing action.

Small, unpacked, plug valves are also known as "cockers". The plug body of the plug valve is mostly a cone (there is also a cylindrical body), which is matched with the conical orifice surface of the valve body to form a sealing pair. The plug valve is the earliest type of valve used, with simple structure, fast opening and closing, and low fluid resistance.

Ordinary plug valves rely on the direct contact between the finished metal plug body and the valve body to seal, so the sealing is poor, the opening and closing force is large, easy to wear, and usually can only be used in low pressure (not higher than 1 megapascal) and small diameter (less than 100 mm) occasions.

In accordance with the provisions of the JB T 308-2004 valve model preparation method

x== plug valve.

1== Connection form: internal thread.

3== Plug valve structure: straight flow channel, packing seal.

w== Sealing surface material: Body. That is, when the sealing material of the valve is the body material of the valve, -10== pressure level:

Gate valve Z45T-10: This valve is widely used in petroleum, chemical, pharmaceutical, electric power and other industries, and is used for opening and closing on the pipeline of steam, water and oil medium at nominal pressure.

Gate valve Z15-10: The direction of movement of the gate plate is perpendicular to the direction of the fluid, the gate valve can only be fully opened and closed, and the parameters of the door are different, usually 5°, and 2°52' when the medium temperature is not high. Improve its manufacturability and make up for the deviation of the sealing surface angle in the processing process.

The difference between the two gate valves is not only the above, but also that the Z45T-10 is flanged and the Z15-10 is threaded.

The former is flanged and the latter is threaded.

The valve connection form is not the same.

Z45T-10 is flange connection, Z15-10 is thread connection, but the valve connection form is different.

One is flange connection and the other is threaded connection.

QF-2A CO2 Bottle Valve.

The material is made of high-quality brass, specifications and models: QF-2A;

Medium: carbon dioxide;

Nominal pressure: 15MPa;

DN:7mm;

Outlet thread Qisen accompany: G5 8;

Connecting threads with gas cylinders: ;

Safety device temperature or pressure: 21.

PX-32 Argon Spring Bottle Valve:

Model: PX-32A

Applicable medium: argon, oxygen, hydrogen, nitrogen, air quietly.

Specifications 4 points.

Material: Copper. Adjustment range 0-150

Nominal flow rate 1 100 (l s).

Working pressure: 15MPa

DN: 4mm

Outlet thread: G5 8

Inlet thread: GB8335...

Safety Device Temperature or Pressure: None.

Neither the valve nor the faucet can be directly connected to the hose.

It must be connected to a hard line and then to a hose, and it must be at a pressure of no more than 5 atmospheres.

Standardized construction is absolutely not possible, and it must be connected to a section of pipe before it can be connected, because the connection will be too soft and the pipe will bend down.