ARMATUREN Butterfly Valve

ARMATUREN Butterfly Valve

A butterfly valve is a shut-off valve with a relatively simple construction. In the closed position, the disc blocks the valve bore while in open position, the disc is turned to allow flow. A quarter turn takes the valve from fully open to the fully closed position or the opposite, and thus the butterfly valve allows for quick opening and closure.

Butterfly valves are among the family of quarter-turn valves and work very similar to ball valves. The “butterfly” is a disk connected to a rod. It closes when the rod rotates the disc by a quarter turn to a position perpendicular to the flow direction. When the valve opens, the disk is rotated back to allow the flow.

Butterfly valves are used for on-off or modulating services and are popular due to their lightweight, small installation footprint, lower costs, quick operation and availability in very large sizes. These valves can be operated by handles, gears or automatic actuators.

Butterfly Valve Applications

Butterfly valves can be used across a wide range of applications. They perform well in large volume water applications and slurry applications. The following are some typical applications of Butterfly valves:

• Cooling water, air, gases, fire protection, etc.
• Slurry and similar services
• Vacuum service
• High-pressure and high-temperature water and steam services
• Compressed Air or Gas Applications

Advantages of Butterfly Valves

1. The compact design requires considerably less space, compared to the gate, globe, or other valves.
2. Light in weight.
3. Quick-acting
4. low-pressure drop and high-pressure recovery
5. Provide a bubble-tight service.

Disadvantages of a Butterfly Valve

Features

• Soft Sealing
• Maintenance-free
• Good flow characteristic due to excellent Zeta-values
• Seat material EPDM / NBR / FPM
• Double sealing of the stem
• Stainless steel disc
• Centrical disc bearing
• Nodular iron body

Specification

Medium:

• Coldwater
• warm water
• process water

Pressure

• PN16

Size

• DN10
• DN25
• DN32
• DN40
• DN50
• DN65
• DN80
• DN100
• DN125
• DN150
• DN200
• DN250
• DN300
• DN350
• DN400

Temperature

• -10°C – 100°C

Type

• Wafer
• Lug

Data Sheet