How to use flanged butterfly valve?

Large flanged butterfly valves are usually equipped with gearbox type actuator, where the handwheel is connected to the stem via a gearbox. This will reduce the force but at the same time reduce the speed of the operation. The flanged butterfly valve should be installed in the open position. If the flanged butterfly valve is closed during installation, the rubber seat will wedge against the valve disc and make it difficult to open.

 

What is the material of flanged butterfly valve?

What are the components of flanged butterfly valve?

How to use flanged butterfly valve?

 

What is the material of flanged butterfly valve?

The flanged butterfly valve is to adjust the flow rate and intercept the medium on the water supply and drainage and gas pipelines. Moreover, flanged butterfly valve can be opened and closed quickly by rotating 90° with simple operation. At the same time, the flanged butterfly valve has good fluid control characteristics.

The sealing structure of the flanged butterfly valve adopts PTFE, synthetic rubber and phenolic resin to form a composite valve seat, which makes the valve seat more elastic and stronger. At the same time, the flanged butterfly valve plate is fully covered with PTFE so that the butterfly plate has strong corrosion resistance.

Flanged butterfly valve body can be made of carbon steel, stainless steel, cart iron, ductile iron, cast bronze, DSS, nickel alloy, or titanium alloy. Flanged butterfly valve disc can be made of aluminum or stainless steel. The stem of flanged butterfly valve can be made of cast steel or stainless steel. The seat of flanged butterfly valve can be made of neoprene, PTFE, EPDM, NBR, viton, BUNA-N, Inconel, or stainless steel.

 

What are the components of flanged butterfly valve?

Flanged butterfly valve body: the body of the flanged butterfly valves fits two pipe flanges.

Flanged butterfly valve disk: The disk is the element that stops the flow. For improving flow, sealing, and operating torque, there are variations in disk design and orientation.

Flanged butterfly valve stem: The stem of the flanged butterfly valve consists of a one-piece or two-piece shaft design. Stem design shall prevent galling potential between similar corrosion-resistant materials.

Flanged butterfly valve Seat: To provide shutoff, the seat of a flanged butterfly valve utilizes an interference fit between the disk edge and the seat. The seat may be bonded, pressed, or locked into the body.

 

How to use flanged butterfly valve?

The flanged butterfly valve should be stored in a dry, ventilated room, and both ends of the valve channel should be blocked.

Flanged butterfly valves stored for a long time should be checked regularly to remove dirt. Special attention should be paid to the cleaning of the sealing surface of flanged butterfly valves to prevent damage to the sealing surface.

Before installation, carefully check whether the flanged butterfly valve mark is equal to the use requirement.

Before installation, check the flanged butterfly valve channel and sealing surface. If there is dirt, wipe it with a cleaning cloth.

During installation, the tightening force of the connecting bolts of flanged butterfly valve should be even and appropriate.

The flanged butterfly valve can be installed on horizontal and vertical pipelines. The installation position should ensure that it is easy to use, maintain and replace.

The use of the flanged butterfly valve should be checked regularly to check whether the sealing surface is worn or not and the gasket packing. If the damage fails, it should be repaired or replaced in time.

 

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