wafer butterfly valve Archives

Wafer butterfly valve installation instructions and steps

June 10, 2021

Wafer butterfly valve is one of the most common types of valves in industrial pipelines. The wafer butterfly valve itself has a relatively small structure. You only need to put the butterfly valve in the middle of the flanges at both ends of the pipeline, and use stud bolts to pass through the pipeline flange and the The clip-on butterfly valve is locked to control the fluid medium in the pipeline. Wafer butterfly valve is especially suitable for places with narrow space or short distance between pipelines. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body. Therefore, the pressure drop generated by the valve is very high. Small, so it has better flow control characteristics.

wafer type butterfly valve, with handle (13)

1. Instructions before installation of wafer butterfly valve:
1. Before installation and operation, use air spray to remove foreign objects on the piping, and clean the inner surface of the piping with clean water.
2. Carefully check whether the valve usage is consistent with its performance specifications; (temperature, pressure)
3. Check the valve channel and sealing surface for debris, and remove it in time;
4. The valve must be installed in time after unpacking, please do not loosen any fastening screws or nuts on the valve at will;
5. Wafer butterfly valves must use special butterfly valve flanges.
6. The electric butterfly valve can be installed on the pipeline at any angle. For the convenience of maintenance, it is recommended not to install it upside down.
7. When installing the butterfly valve flange, it must be ensured that the flange surface and the sealing rubber are aligned, the screws are evenly tightened, and the sealing surface must fit completely; if the screw tightening force is uneven, the rubber bumps will block the butterfly plate, or the top Staying on the butterfly plate causes leakage at the valve stem. To
2. The installation steps of the wafer butterfly valve: The correct installation of the wafer butterfly valve is related to the sealing degree of the butterfly valve, and whether it will leak or not, including the safety in working conditions. The user should understand the installation process.

wafer & lug type butterfly valve (7)

1. As shown, place the valve between the two pre-installed flanges, paying attention to the alignment of the bolt holes.
2. Gently insert four pairs of bolts and nuts into the flange holes, and tighten the nuts slightly to correct the flatness of the flange surface;
3. Fix the flange to the pipeline by spot welding;
4. Remove the valve;
5. Fully weld and fix the flange on the pipeline;
6. Install the valve after the welding port has cooled down. Ensure that the valve has enough space in the flange to prevent the valve from being damaged, and ensure that the valve plate has a certain degree of opening;
7. Correct the valve position and tighten the four pairs of bolts (be careful not to over tighten)
8. Open the valve to ensure that the valve plate can be opened and closed freely, and then slightly open the valve plate;
9. Tighten all nuts in cross balance;
10. Reconfirm that the valve can open and close freely. Note: Confirm that the valve plate does not touch the pipeline.
The installation of the wafer butterfly valve must be laid flat before installation, remember not to bump it at will, after it is drawn to the installation length during installation, in the design of the on-site pipeline, it is not possible without special permission Disassemble the wafer butterfly valve at will, this is what we need to know before installation. At the same time, everyone should know that the wafer butterfly valve can be installed in any position, but after the wafer butterfly valve is installed, the butterfly valve needs to be laid along the line, and a bracket is made for the wafer butterfly valve. Once the bracket is made, it will be used At that time, it is strictly forbidden to remove the bracket.
Related products: Electric wafer butterfly valve Pneumatic wafer butterfly valve

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

The structural characteristics and uses of the wafer butterfly valve

July 20, 2020

The structural characteristics and uses of the wafer type butterfly valve:

wafer type butterfly valve, NBR seat (11)

The unique design of three-way eccentricity enables frictionless transmission between the sealing surfaces and prolongs the service life of the valve.
The elastic seal is produced by torque.
The ingenious wedge-shaped design makes the valve have an automatic sealing function as the valve is closed and tighter, and the sealing surface has compensation and zero leakage.
Small size, light weight, light operation, easy to install.
Pneumatic and electric devices can be configured according to user requirements to meet the needs of remote control and program control.
The material of the replacement parts can be applied to various media, and the lining can be anticorrosive (lining F46, GXPP, PO, etc.)
Diversified continuous structure: butt clamp, flange, butt welding.

Used in the gas pipeline in the sulfuric acid industry: the inlet and outlet of the blower in front of the furnace, the inlet and outlet of the relay fan, the electric demisting series and the connecting valve, the inlet and outlet of the S02 main blower, the adjustment of the converter, the inlet and outlet of the preheater, etc. and the use of cut-off gas.
It is used in the sulfur burning, conversion and dry absorption sections of the sulfur-burning sulphuric acid plant. It is the preferred brand of valves for the sulphur-burning sulphuric acid plant. It is regarded by the majority of users as: good sealing performance, light operation, secondary corrosion, high temperature resistance, convenient operation, The flexible, safe and reliable butterfly valve has been widely used.
It is also widely used in: SO2, steam, air, gas, ammonia, CO2, oil, water, brine, lye, seawater, nitric acid, hydrochloric acid, sulfuric acid, phosphoric acid in the chemical, petrochemical, smelting, pharmaceutical, food and other industries It is used as a regulating and intercepting device on the pipeline of other medium.

Tianjin Tanghaidongyang valve Co., Ltd. is one of the largest butterfly valve manufacturers in China, main products are butterfly valves, check valves. Main products: butterfly valve, lug type butterfly valve, wafer type butterfly valve, U-type butterfly valve, double flange butterfly valve, gate valves, check valves, globe valves, valve parts (Valve body, Valve disc, Valve shaft, Valve seat…)

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Comparison and analysis of the performance of the wafer butterfly valve

July 20, 2020

With the same nominal pressure and nominal diameter, ordinary which has better tightness and is not easy to leak? butterfly valve or gate valve?

wafer type butterfly valve, NBR seat (11)

The airtightness of the gate valve is better than that of the butterfly valve, but there are also manufacturers’ butterfly valves that have better airtightness.
The gate valve is large in size and takes up a lot of space.
The butterfly valve is small in size and takes up little space.

When selecting concretely, the temperature of the medium, the sealing of the valve and the packing should also be considered.
The specification stipulates that the butterfly valve with a nominal diameter greater than 50 is used.

Wafer butterfly valve is a national key new product. The high-performance manual butterfly valve adopts a double eccentric and a special oblique cone oval sealing structure. It solves the shortcoming of the traditional eccentric butterfly valve that the sealing surface is still in sliding contact friction at the moment of opening and closing 0°～10°, and the sealing surface of the butterfly plate is separated at the moment of opening, and the effect of sealing when the contact is closed is achieved to extend the service life and maximize the sealing performance.

Tanghai Valve is the best manufacturer of wafer-type butterfly valve in China. We produce the best quality products with competitive low prices.

13 gate-valve-5

Our products use advanced manufacturing technology, and strictly conform to API, DIN, BS, EN, GB and other international standards. The main products are butterfly valves, gate valves, check valves, globe valves, valve parts (Valve body, Valve disc, Valve shaft, Valve seat…), etc. Our products are widely used in various fields such as marine industry, shipbuilding, petrochemical, metallurgy, water treatment, fire fighting, water supply and drainage, etc. The company has won unanimous recognition and praise from customers with high quality and good reputation.

We have established long-term and stable business relationships with many multinational companies. Our products are exported to Europe, the United States, Australia, and the Middle East, Southeast Asia and other countries and regions. The quality of our products has been widely recognized by customers, and has been trusted and praised by customers. Gradually we have established a close technical partnership with customers from various countries.

We are committed to “Build a top valve enterprise; Be a reliable partner!”

Friends from all over the world are welcome to visit us for evaluation, guidance, and orders!

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

What is a wafer type butterfly valve

July 20, 2020

The butterfly valve plate of the wafer type butterfly valve is installed in the diameter direction of the pipeline. In the cylindrical passage of the butterfly valve body,

Wafer type butterfly valve with worm gear

the disc-shaped butterfly plate rotates around the axis, and the rotation angle is between 0°-90°. When the rotation reaches 90°, the valve is fully opened. This valve is generally installed horizontally. The wafer butterfly valve is simple in structure, small in size and light in weight, and consists of only a few parts. Moreover, it can be opened and closed quickly by rotating 90°, and the operation is simple. At the same time, the valve has good fluid control characteristics.

When the wafer type butterfly valve is in the fully open position, the thickness of the butterfly plate is the only resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. The butterfly valve has two sealing types: elastic seal and metal seal. Elastic sealing valve, the sealing ring can be embedded in the valve body or attached to the periphery of the butterfly plate.

Valves with metal seals generally have a longer life than valves with elastic seals, but it is difficult to achieve a complete seal. Metal seals can adapt to higher operating temperatures, while elastic seals have the defect of being limited by temperature.

If the wafer type butterfly valve is required to be used as a flow control, the main thing is to correctly select the size and type of the valve. The structure principle of the butterfly valve is especially suitable for making large diameter valves. Butterfly valves are not only widely used in general industries such as petroleum, gas, chemical, and water treatment, but also used in cooling water systems of thermal power stations.

Commonly used butterfly valves include wafer butterfly valves and flanged butterfly valves. Wafer type butterfly valve uses double-head bolts to connect the valve between two pipe flanges. Flange type butterfly valve has flanges on the valve, and bolts are used to connect the flanges at both ends of the valve to the pipe flanges.

Tianjin Tanghai Valve Manufacturing Co., Ltd. is one of the largest butterfly valve manufacturers in China, main products are butterfly valves, check valves. The Key products: butterfly valve, lug type butterfly valve, wafer type butterfly valve, U-type butterfly valve, double flange butterfly valve, gate valves, check valves, globe valves, valve parts (Valve body, Valve disc, Valve shaft, Valve seat…)

TH Valve is a professional manufacturer of butterfly valve, gate valve, check valve, globe valve, knife gate valve, ball valve with API, JIS, DIN standard, used in Oil, Gas, Marine industry, Water supply and drainage, fire fighting, shipbuilding, water treatment and other systems, with Nominal Diameter of DN50 to DN1200, NBR/EPDM/VITON, Certificates & Approvals: DNV-GL, Lloyds, DNV, BV, API, ABS, CCS. Standards: EN 593, API609, API6D

Posts

Wafer butterfly valve installation instructions and steps

The structural characteristics and uses of the wafer butterfly valve

Comparison and analysis of the performance of the wafer butterfly valve

What is a wafer type butterfly valve

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