Tomoe: Different Types Of Butterfly Valves

By October 15, 2021Blog

Butterfly valves are a sort of quarter-turn valve with disc-shaped seating. When the valve is closed, the disc is perpendicular to the flow, and when the valve is open, it is parallel to the flow. Handles, gears, and mechanical/pneumatic actuation are all options for these valves. While butterfly Tomoe valves KSA are simple to operate, most individuals are unaware of the various varieties of butterfly valves available. Let us examine the different types of butterfly valves. 

Concentric Butterfly Valve: 

The most fundamental butterfly valve design is the concentric butterfly valve. The valve stem travels across the disc’s centerline in this construction, and a zero-offset valve is another name for this type of valve. Concentric butterfly valves serve low-pressure services.  

Wafer Type Butterfly Valve:

The valve body is surrounded by the flange bolts of a wafer-type butterfly valve situated between two pipe flanges. The most cost-effective butterfly valve is this one. Both the flanges and the valve body are secured with long bolts. A wafer butterfly valve seals against fluid flow pressure differences in both directions. The wafer butterfly valves are designed to defend against a tight seal and a two-way differential pressure. Because this type of valve lacks bolting holes, flanged pipes with bolts are used to secure the valve body in place. Wafer Tomoe valves SAUDI is easier to install than lug style valves, although valve and flange alignment can be more challenging. 

Lug Style Butterfly Valve:

The threaded lugs or inserts around the perimeter of the lug butterfly valve allow bolt passageways. A specific hole can be used to implement two sets of bolts without the use of a nut. During assembly, the lugs make this easy to match the two flanges slotting the lug valve. As a result, disconnecting one section of the pipe without taking the entire valve system seems to be quite simple with this layout. A lug-style valve is a versatile chemical handling option that can tolerate temperatures up to 200 degrees Celsius.

Flanged/Double Flanged Butterfly Valves:

The double flanged butterfly valve comprises a flanged body and elevated rims between two flanged pipes of the same size. This valve is utilized in heavy-duty situations where its strength and stiffness are advantageous. Controlling, regulating, and double-flanged butterfly valves do throttling flow. For dead-end service, it is known as one of the most durable seated valve designs. With the fixation of the gearbox, it controls the disc in different positions, this type of valve can be used as a shut-off mechanism.

Rubber Lined Butterfly Valves:

Butterfly valves with rubber linings are a type of valve that can isolate or regulate flow. The disc, which rests in the center of the valve body, is the closing mechanism. The shaft, which extends from the disc through the top of the valve body, connects the disc to a handle or actuator. The disc of a butterfly valve, unlike a ball valve, is always present in the flow, causing a pressure drop. Because of their smaller weight, butterfly valves may be shut off rapidly but require less support than a heavier ball valve.

Zero Offset Butterfly Valve:

The valve utilized in low-pressure and temperature services has a zero offset design, and the disc and shaft axes are concentric with the valve body in this configuration. The disc divides the flow into two halves, in the open position, with the disc in the center and parallel to the flow. A full seat is used in this type of valve, and when the disc deforms the soft seat, it seals the gap. 

Final Thought 

Butterfly valves can provide an affordable, long-term solution to flow control in big process plants, power plants, refineries, pulp, and paper production. Hence, the details mentioned above are the different types of butterfly valves, and you can buy them from TOMOE distributors.