3 inch gate valve

3 inch gate valve N10131009 is 200WOG (PN16) pressure rated, can be used in middle and low pressure pipelines, suitbale for most home applications and DIY plans. The model are available in NPT or BSP threads for customers in USA and Europe. As a professional brass gate valve manufacturer in China, we also offer 18 inch gate valve, 4 inch flanged gate valve, 1/2 inch gate valve price, one inch gate valve, mueller 8 inch gate valve, pvc gate valve 2 inch, 20 inch gate valve, magic 2 inch gate valve.

The use effect of 3 inch gate valve must be more concerned by many people. In practical application, it does have strong functional effect and advantages, which can meet the installation and use needs of industrial environment. 3 inch gate valve
 not only guarantees better quality of use, but also has very high safety and stability, so there is no need to worry about unexpected safety hazards, bringing you a worry-free and assured use experience.

3 inch gate valves have a long service life. As long as you choose the appropriate specifications and models, install and use them in the correct way, and ensure that various failures are avoided in practical applications, you can play a better use advantage. It can achieve a long service life, reduce the cost of use, and solve the troublesome problem of maintenance.

3 inch gate valves are suitable for water, oil, gas, steam, etc. Application areas: mechanical equipment, chemical equipment, general parts, industrial equipment, water supply and drainage equipment, papermaking equipment, pharmaceutical equipment, general equipment, petrochemical equipment, power equipment, metallurgical powder equipment, mining equipment, municipal, electronic industry, etc.

1. Clarify the use design of the 3 inch gate valve in the equipment or device, and determine the working conditions of the 3 inch gate valve: applicable medium, working pressure, working temperature, etc.

2. Determine the nominal diameter and connection method of the pipe connecting with the 3 inch gate valve: flange, thread, welding, ferrule, quick installation, etc.

3. Determine the way to operate the 3 inch gate valve: manual, electric, electromagnetic, pneumatic or hydraulic, electrical linkage or electro-hydraulic linkage, etc.

4. According to the medium conveyed by the pipeline, the working pressure and the working temperature, the materials of the shell and internal parts of the 3 inch gate valve are determined:

5Choose the type of 3 inch gate valve: closed-circuit 3 inch gate valve, regulating 3 inch gate valve, safety 3 inch gate valve, etc.

6. Determine the type of 3 inch gate valve: gate valve, globe valve, ball valve, butterfly valve, throttle valve, safety valve, pressure reducing valve, steam trap, etc.

7. Determine the parameters of the 3 inch gate valve: For the automatic 3 inch gate valve, first determine the allowable flow resistance, discharge capacity, back pressure, etc. according to different needs, and then determine the nominal diameter of the pipeline and the diameter of the valve seat hole.

8. Determine the geometric parameters of the selected 3 inch gate valve: structural length, flange connection form and size, the size of the 3 inch gate valve in the height direction after opening and closing, the size and number of bolt holes connected, the overall size of the 3 inch gate valve, etc. .

9. Use existing materials: 3 inch gate valve product catalog, 3 inch gate valve product samples, etc. to select appropriate 3 inch gate valve products.

1. The handwheel, handle and transmission mechanism are not allowed to be used for lifting, and bumping is prohibited.

2. The 3 inch gate valves should be installed straight (that is, the valve stem is in a straight position, and the handwheel is at the top).

3. 3 inch gate valve with the bypass valve should open the bypass valve before opening (to balance the pressure difference between the inlet and outlet and reduce the opening force).

4. 3 inch gate valve with transmission mechanism shall be installed according to the rules of the product instruction manual.

5. If the valve is frequently used, it should be smoothed at least once a month.

6. 3 inch gate valve is only used to fully open and fully close the medium on various pipelines or equipment, and is not allowed to be used for saving.

7. For 3 inch gate valves with handwheels or handles, auxiliary levers should not be added during operation (if the sealing is not tight, the sealing surface or other parts should be checked and corrected). The handwheel and handle are turned clockwise to be closed, and vice versa. 3 inch gate valve with drive mechanism should be used according to the rules of the product instruction manual.

The opening and closing part of 3 inch gate valve is the gate, and the movement direction of the gate is straight with the direction of the fluid. 3 inch gate valve can only be fully opened and fully closed, and cannot be adjusted or saved.

The gate has two sealing surfaces. The two sealing surfaces of the commonly used gate valve form a wedge shape. The wedge angle varies with the valve parameters, generally 5°, and 2° when the medium temperature is not high. The gate of the wedge gate valve can be made into a whole, called a rigid gate; it can also be made into a gate that can deform slightly to improve its manufacturability and compensate for the errors that occur during the processing of the sealing surface point of view. The plate is called an elastic gate. When 3 inch gate valve is closed, the sealing surface can be sealed only by the medium pressure, that is, relying on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. Most gate valves are forced to seal, that is, when the valve is closed, the gate should be pressed against the valve seat by strong external force to ensure the tightness of the sealing surface. The gate of 3 inch gate valve moves in a straight line with the valve stem, which is called a lifting rod gate valve, also known as a rising rod gate valve. Generally, there is a trapezoidal thread on the lifting rod. Through the nut at the top of the valve and the guide groove on the valve body, the rotary motion is changed into a linear motion, that is, the operating torque is changed into an operating thrust. When the valve is opened, when the height of the gate plate is equal to 1:1 times the diameter of the valve, the fluid channel is cleared, but this position cannot be monitored during operation. In actual use, the pole of the valve stem is used as a sign, that is, the position where it cannot be opened, as its full opening position. In order to take into account the locking phenomenon of temperature changes, generally open to the extreme position, and then rewind 1/2-1 circle, as the position of the fully open valve. Therefore, the full opening position of the valve is confirmed by the position of the gate, that is, the stroke. For some gate valves, the stem nut is set on the gate, and the handwheel rolls to drive the valve stem to roll, and the gate is raised. This kind of valve is called a rotating stem gate valve, or a dark stem gate valve.

Brass gate valve has super stability, strong quality and function, meets the installation requirements of various equipment and pipelines, and brings powerful functional advantages. The premise is to buy products from professional and regular brass gate valve manufacturers to get better quality Good user experience, so how to judge whether a manufacturer has professional qualifications?

First, compare the production and processing conditions of various manufacturers, and also understand the evaluation and reputation of the manufacturer in the entire industry. After determining these objective problems, you can understand the actual situation of different manufacturers. In order to determine whether the manufacturer meets the production needs, it can be determined whether the manufacturer has professional production and processing qualifications.

Second, in addition to judging the production and processing level of the manufacturer, it is also necessary to know whether the manufacturer has better after-sales service and whether it is reasonable in terms of price positioning. Comprehensive consideration of these customer problems can determine the specific service situation and understand. Whether the manufacturer meets your own needs, you can choose as many manufacturers as possible to compare their professionalism.

Third, to judge whether the brass gate valve manufacturer is professional, it is necessary to understand the above specific problems. You can understand whether the manufacturer has a better comparison of advantages in production and processing. Different types of manufacturers can choose to avoid being deceived by blind choices and bring more benefits. Good use effect, but also has a stronger after-sales service guarantee