The soft sealed open rod gate valve has not been closed

Here are some of the well-known brands recognized in the valve industry, which are widely recognized and have a high reputation. While rankings may vary depending on time and market conditions, the following brands are generally considered to be among the top brands in the valve industry:

The following influential first-line brands of water system valves and industrial valves can be used as a reference, but for reference only: Suzhou Neway Valve, Shanghai Guanlong Valve, Shanghai Qizhong Valve, Sanhua, Su Yan, 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.

These brands are known in the valve industry for their innovative technology, high-quality products and reliability. It is important to note that the market and industry are evolving rapidly, and different rankings may vary depending on time and region. For the most up-to-date ranking information, it is recommended to refer to industry reports, professional organizations or market research data for more detailed and accurate information.

Check CJ T 216-2013 "Soft Seal Gate Valve for Water Supply and Drainage".

There is no requirement for upper sealing in the standard.

Is there a reverse dress?

Small caliber can be worn upside down on 300 or more recommended cannot.

1.Integral lagging of the gate of the open rod soft seal gate valve adopts integral lagging of the gate, which has good coverage performance and accurate geometric size to ensure reliable sealing and service life.

2.Light weight: The valve body is made of ductile iron, which is light in weight and easy to install.

3.Flat bottom seat: The bottom adopts the same flat bottom seat design as the water pipe, which does not produce debris siltation and is more reliable sealing.

4.Corrosion resistance: The inner cavity of the gate valve is coated with non-toxic epoxy resin to prevent corrosion and rust, and can be used not only for raw drinking, but also for sewage systems.

5.Three "0" seals: The valve stem is sealed with three 0-type rings, which has low friction resistance, light switch and no water leakage.

There is no GB series of soft seal gate valves, and they are currently implemented: "CJ T 216-2013 Soft Seal Gate Valve for Water Supply and Drainage" standard.

There are many types of gate valves, the common ones are Flange cast steel gate valve Z41H, Z41Y stainless steel gate valve Z41W soft seal dark rod gate valve Z45x soft seal open rod gate valve Z41X cast steel flange gate valve Z41T Z45T threaded gate valve Z11T Z14T Z15x Z11H Z11Y Z11w knife gate valve Z73W Z73X Z73Y

In water supply and drainage and civil air defense engineering, there are more dark rod elastic seal gate valves. Compared with the traditional wedge or parallel double gate valve, this kind of gate valve has the following characteristics: 1. The valve body and valve cover of the soft seal gate valve are cast by precision casting method, formed at one time, no longer machined at all, no sealing copper ring is used, and non-ferrous metals are saved; 2. There is no pit at the bottom of the soft seal gate valve, no accumulation of slag, and the failure rate of the gate valve opening and closing is low; 3. The size of the soft sealing and rubber lining valve plate is uniform and the interchangeability is strong.

Therefore, the soft seal gate valve will be the development direction of the gate valve, and it is also a kind of valve that the water supply industry is willing to use.

1. For oil and natural gas transmission pipelines, plate gate valves with single or double gates are selected. If you need to clean the pipeline, choose a single gate or a double gate with a deflector hole and an open rod plate gate valve. 2. For the transportation pipeline and storage equipment of refined oil, the flat gate valve with single gate plate or double gate plate without diversion hole is selected.

3. For oil and natural gas exploitation wellhead devices, single or double gate valves with dark rod floating valve seats with diversion holes are selected, most of which are API6A standards. 4. For pipelines with suspended particle media, knife-type flat gate valves are selected. 5. For the city gas transmission pipeline, single gate or double gate plate soft sealing open rod flat gate valve is selected.

6. For urban water projects, single or double gate valves without diversion holes are selected.

Main Differences Between Open Rod Gate Valve and Dark Rod Gate Valve:

1. Open rod gate valve: the stem nut is on the valve cover or bracket, and when the gate is opened and closed, the stem nut is rotated to realize the lifting of the valve stem. This structure is beneficial to the lubrication of the valve stem and has a clear degree of opening and closing, so it is widely used.

2. Dark rod gate valve: the stem nut is in the valve body, which is in direct contact with the medium. When opening and closing the gate, it is achieved by rotating the valve stem.

The advantage of this construction is that the height of the gate valve is always the same, so the installation space is small, and it is suitable for large diameter or gate valves with limited installation space. This structure should be equipped with an opening and closing indicator to indicate the degree of opening and closing.

The disadvantage of this structure is that the stem thread not only cannot be lubricated, but also directly accepts the erosion of the medium and is easily damaged.

3. The lifting screw of the dark rod flange gate valve only rotates without moving up and down, and only one rod is exposed, and its nut is fixed on the ram, and the ram is lifted by the rotation of the screw, and there is no visible gantry; The lifting screw of the open rod flange gate valve is exposed, and the nut is close to the handwheel and is fixed (not rotating or axially moving), and the ram is lifted by rotating the screw, and the screw and the ram have only relative rotational motion without relative axial displacement, and the appearance is a door-shaped bracket.

4. The dark rod valve cannot see the lead screw, while the open rod can see the screw.

5. When the dark rod valve is switched, the steering wheel and the valve stem are connected together and relatively immovable, and it is driven by the valve stem to drive the valve disc to lift up and lower the gate to complete the opening and closing. Exposed rod valves raise or lower the disc through the threaded transmission between the stem and the steering wheel. To put it simply, the open rod valve is a valve disc that moves up and down together with the valve stem, and the steering wheel is always at a fixed point.

The first-class fire engineer examination memorizes the mantra of the bright rod gate valve and the dark rod gate valve.

Crown valve pushing.

The functionality is the same.

The only difference is that the open rod gate valve can be opened from the appearance, whether the valve is closed or open, the open rod is generally used for fire fighting, and it can be very clear that the first time to know whether the valve is open or closed, the dark rod must be tried manually.

The soft seal gate valve is a replacement product of the traditional low-pressure gate valve, the use of elastic ram to produce a small amount of deformation of the compensation effect, to achieve a good sealing effect, the valve has the obvious advantages of light switch, reliable sealing, good elastic memory and long service life, can be widely used in tap water, sewage, construction, food, electric power, medicine, metallurgy, textile, energy system and other fluid pipelines as a regulating and intercepting device.