How do you take apart a butterfly valve?

Remove the plug and bushing from the bottom of the butterfly spindle. Turn the butterfly disc to the open position. Detach the seat from the butterfly disc by squeezing the seat until it can be pulled off the end of the butterfly spindle, then slide off the butterfly disc shaft end.

Are butterfly valves manual?

Butterfly valves can be operated manually by handles and gears or automatically by electric, pneumatic or hydraulic actuators. These devices allow precise rotation of the disc to positions ranging from fully open to fully closed.

What happens when you open the butterfly valve?

The butterfly valve is classified as a quarter-turn valve. It works like a ball valve for quick shutoff, but unlike a ball valve, the butterfly valve can also open and close incrementally. This difference means that the disc is always present in the flow and allows for a drop in pressure.

How do you rebuild a butterfly valve?

Follow the procedure below:

1. Turn the disc (2) to closed position.
2. Remove the taper pins (6) in the disc (2).
3. Remove the packing gland (7).
4. Remove the stem (4) by pulling it out through the valve top plate.
5. Remove the disc (2) from the valve body (1) by pulling or rolling the disc out of the seat bore.

Can butterfly valves be rebuilt?

Since 1984, we provide complete reconditioning and repair of butterfly valves, instrumentation, accessories and parts within the U.S. and abroad. Our Class-A repair & reconditioning process ensures that all of your butterfly valves are maintained and will operate at peak efficiency.

What is the flow direction in butterfly valve?

When speaking of flow direction. through a butterfly valve, the flow is. commonly described as either. toward the “seat side” or “non-seat. side” of the valve, or toward the “flat.

Is gasket required for butterfly valve?

The seat in a resilient-seated Butterfly valve usually extends around to both faces of the valve. As a result, no gaskets are required as these seats serve the function of a gasket. The seat material which extends past the face is compressed during installation and flows toward the centre of the valve seat.

How long do butterfly valves last?

The attached table shows the extended life expectancy of the Xtreme seat in a high performance butterfly valve. The rubber lined products operate without leaks from the 1,000 – 5,000 cycle range. An extremely high quality rubber liner may last up to 10,000 cycles.

How do you troubleshoot a butterfly valve?

Wash with water or a mild detergent if needed. Make sure there is no warpage of the flange or misalignment of the butterfly valve in relation to the flange. This is the most common cause of butterfly valve problems where it is not aligned with the flange/pipe correctly and the disc catches when trying to open/close.

Does a butterfly valve have packing?

The packing in these valves simply prevents dirt and dust from entering from outside the valve. A high performance butterfly valve uses a rigid PTFE, or metal seat, that is narrower than the valve body.

Why choose Tri-Clover LKB butterfly valves?

Either remotely controlled by an actuator or manually operated with a handle, the Tri-Clover LKB butterfly valve is designed to provide years of dependable service in sanitary stainless steel fluid handling systems. The LKB valves are built for use in a wide range of applications and working pressures.

Is there a manual for the Tri-Clover valves?

Thank you for purchasing a Tri-Clover Product! This manual contains disassembly and assembly instructions, maintenance procedures, and a complete parts list for all 761, 741, 762, 771 Air Actuated Valves, designed and manufactured by Tri-Clover, Inc., Kenosha, Wisconsin. READ THIS MANUAL carefully to learn how to service these valves.

Why choose Alfa Laval Tri-Clover butterfly valves?

Alfa Laval’s Tri-Clover LKB butterfly valve is designed for use in a broad spectrum of applications and working pressures. These FDA-compliant valves provide reliable performance and smooth operation.

How do I identify a Tri-Clover air-actuated valve?

Series 761 Available Valve Styles Each Tri-Clover Air-Actuated Valve is identified by a model number.